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TEXAS INSTRUMENTS OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G handbook

1. Vo PP Maximum Peak to Peak Output Voltage V 1k 10k 100 k 1M 10M f Frequency Hz Figure 8 OP27A OP27E OP37A OP37E LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION VS TOTAL SUPPLY VOLTAGE 2500 2000 1500 1000 500 Avyp Differential Voltage Amplification V mV 0 10 20 30 40 50 Vcc Vcc Total Supply Voltage V Figure 10 Vo PP Maximum Peak to Peak Output Voltage V Ayp Differential Voltage Amplification V mV d TEXAS INSTRUMENTS 2 10 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP37 MAXIMUM PEAK TO PEAK OUTPUT VOLTAGE VS FREQUENCY 10k 100 k 1M 10M f Frequency Hz Figure 9 OP27A OP27E OP37A OP37E LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION VS LOAD RESISTANCE 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 0 1 1 10 100 RL Load Resistance kQ Figure 11 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989
2. 30 0 01 0 1 1 10 100 f Frequency Hz 0 1 uF 100 ko 10 0 LT1001 2 ko 00 22 uF gt 4 3 KQ e iC Oscilloscope Voltage 100 ko Rin 1 MQ OP27 OP37 Gain 50 000 e Device zi 2 2 uF 7 Under 4 7 uF 243kOQ o1 uF Test JI 110 kQ J NOTE All capacitor values are for nonpolarized capacitors only Figure 34 0 1 Hz to 10 Hz Peak to Peak Noise Test Circuit and Frequency Response d TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 17 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 APPLICATION INFORMATION When measuring noise on a large number of units a noise voltage density test is recommended A 10 Hz noise voltage density measurement correlates well with a 0 1 Hz to 10 Hz peak to peak noise reading since both results are determined by the white noise and the location of the 1 f corner frequency Figure 35 shows a circuit measuring current noise and the formula for calculating current noise 10kQ 100 Q 500 kQ Vno 130 nV 2 1 2 1 MQ x 100 500 kO Vno n Figure 35 Current Noise Test Circuit and Formula offset voltage adjustment The input offset voltage and temperature coef
3. Direct Replacements for PMI and LTC OP27 and OP37 Series Features of OP27A OP27C OP37A and OP37C Maximum Equivalent Input Noise Voltage 3 8 nV VHz at 1 kHz 5 5 nV VHz at 10 kHz e Very Low Peak to Peak Noise Voltage at 0 1 Hz to 10 Hz 80 nV Typ Low Input Offset Voltage 25 uV Max High Voltage Amplification 1 V uV Min Feature of OP37 Series Minimum Slew Rate 11 V us description The OP27 and OP37 operational amplifiers combine outstanding noise performance with excellent precision and high speed specifications The wideband noise is only 3 nV VHz and with the 1 f noise corner at 2 7 Hz low noise is maintained for all low frequency applications The outstanding characteristics of the OP27 and OP37 make these devices excellent choices for low noise amplifier applications requiring precision performance and reliability Additionally the OP37 is free of latch up in high gain large capacitive feedback configurations The OP27 series is compensated for unity gain The OP37 series is decompensated for increased bandwidth and slew rate and is stable down to a gain of 5 The OP27A OP27C OP37A and OP37C are characterized for operation over the full military temperature range of 55 C to 125 C The OP27E OP27G OP37E and OP37G are characterized for operation from 25 C to 85 C OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS
4. SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 JG OR P PACKAGE TOP VIEW Vio TRIM 1 8 Vio TRIM IN 7 Vcc IN 3 e oUT Vcc SUNG FK PACKAGE TOP VIEW Vio TRIM Pin numbers are for the JG and P packages AVAILABLE OPTIONS Viomax 25 C to 85 C 55 C to 125 C PRODUCTION DATA information is current as of publication date Products conform to specifications per the terms of Texas Instruments standard warranty Production processing does not necessarily include testing of all parameters 435 TEXAS PACKAGE OP27AJG OP27AFK OP37AJG OP37AFK Copyright 1994 Texas Instruments Incorporated INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 2 4 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED OPERATIONAL AMPLIFIER SLOS100B FEBRUARY 1989 REVISED AUGUST 1 OUT io St o LA Voc Vcc e C WE 260 e Q19 CN T e Bag E l MES X Qo IV N N o IT Q21 Q23 Q24 E e Q11 o Q2 Cy 120 uA e R E e TC1 120 pF for OP27 C1 15pF for OP37 schematic IN IN K Texa INSTRUMENTS 2 2 POSFICSARIGE IBEDB OM 8 85308 9S ILL DE AS X27 526543 OP27A OP27C OP27E OP
5. 1 Ta 25 C 8 0 2 4 6 8 10 12 t Time us Figure 30 Figure 31 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 15 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICS OP37 OP37 VOLTAGE FOLLOWER VOLTAGE FOLLOWER SMALL SIGNAL PULSE RESPONSE LARGE SIGNAL PULSE RESPONSE gt E gt 1 o o o o E E S E 5 5 o o 5 5 o o l 1 o o Vec 15V P Ay 25 Vec t15V C 15 pF TA 25 C 0 02 04 06 08 1 12 t Time us t Time us Figure 32 Figure 33 APPLICATION INFORMATION general The OP27 and OP37 series devices can be inserted directly onto OP07 OP05 uA725 and SE5534 sockets with or without removing external compensation or nulling components In addition the OP27 and OP37 can be fitted to uA741 sockets by removing or modifying external nulling components noise testing Figure 34 shows a test circuit for 0 1 Hz to 10 Hz peak to peak noise measurement of the OP27 and OP37 The frequency response of this noise tester indicates that the 0 1 Hz corner is defined by only one zero Because the time limit ac
6. EXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 2 11 POST OFFICE BOX 1443 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICST SUPPLY VOLTAGE REJECTION RATIO SLEW RATE VS VS FREQUENCY FREE AIR TEMPERATURE 160 20 T Vec 2 15V 140 TA C 18 RL gt 2 ko 120 100 Negative Supply SR Slew Rate V us S OP27 Ayp 2 1 ksvR Supply Voltage Rejection Ratio dB 0 0 1 10 100 1k 10k 100k 1M 10M 100M 50 25 0 25 50 75 100 125 f Frequency Hz TA Free Air Temperature C Figure 16 Figure 17 OP37 OP37 SLEW RATE SLEW RATE VS VS SUPPLY VOLTAGE LOAD RESISTANCE 19 Vec 2 15V Ayp 5 VO PP 20V TA 25 C o o 18 h gt gt 1 1 o o t t ke ko 17 EI E o Oo 1 1 ke k o Oo 16 15 3 t6 t9 t 12 15 t 18 t 21 0 1 1 10 100 Vcc Supply Voltage V f Frequency Hz Figure 18 Figure 19 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS 2 12 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST O
7. Vcc 4 V to 18 V 100 120 94 118 T Full range is 55 C to 125 C NOTES 3 Input offset voltage measurements are performed by automatic test equipment approximately 0 5 seconds after applying power 4 Long term drift of input offset voltage refers to the average trend line of offset voltage versus time over extended periods after the first 30 days of operation Excluding the initial hour of operation changes in Vio during the first 30 days are typically 2 5 uV see Figure 3 d TEXAS INSTRUMENTS 2 4 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 recommended operating conditions Supply voltage VCC Supply voltage VCC E215 V TA 25 C Common mode input voltage VIC V 15V T 55 C to 125 C Cco t15V A 59 C to 125 Operating free air temperature TA electrical characteristics at specified free air temperature Vcc 15 V unless otherwise noted OP37E a OP37G Ge eegen E Vo 0 Vig 0 Input offset voltage Rg 509 SeeNote3 Fulrange w a Average temperature caVIO coefficient of input Full range 1 8 ui offset voltage Long term drift of input hb Vic 20 Lee 3 m Vic 20 25 C V Common mode input n ICR voltage range E Full range
8. 1 bi 3 RL22kQ 12 13 8 VOM Peak output voltage swing RL gt 0 6 kQ 10 11 5 ALD Oka Vo 10V 1000 1800 D gt 1 kQ 1500 Large signal differential llo Input offset current ETC Input ETC current RL 20 6 KQ Vo 2 1 VCC 4V RL gt 2ko VvVo 10v Fullrange Common mode input CM resistance CMRR ratio AVD voltage amplification Supply voltage rejection KSVR ratio t Full range is 25 C to 85 C NOTES 3 Input offset voltage measurements are performed by automatic test equipment approximately 0 5 seconds after applying power 4 Long term drift of input offset voltage refers to the average trend line of offset voltage versus time over extended periods after the first 30 days of operation Excluding the initial hour of operation changes in Vio during the first 30 days are typically 2 5 uV see Figure 3 35 TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 5 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 OP27 operating characteristics over operating free air temperature range VCC 15 V OP27A OP27E OP27C OP27G PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP MAX SR Slew rate Ayp 1 D gt 2 kQ 17 28 17 28 Peak to peak equivalent f20 1 Hzto 10 Hz Rs 20 9 V
9. 27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 absolute maximum ratings over operating free air temperature range unless otherwise noted Supply voltage Voc see Note 1 2 eee eee II ee 22V Supply voltage Vcc see Note 1 sssrrriseipesinccsi isra niao iss u eiai e ia e aa 22 V INPULVOIAQe MI VCC Duration of output short Circuit m unlimited Differential input current see Note 2 25 mA Continuous power dissipation See Dissipation Rating Table Operating free air temperature range OP27A OP27C OP37A OP37C 55 C to 125 C OP27E OP27G OP37E OP37G 25 C to 85 C Storage temperature range 65 C to 150 C Lead temperature 1 6 mm 1 16 inch from case for 60 seconds JG or FK package 300 C Lead temperature 1 6 mm 1 16 inch from case for 10 seconds P package 260 C NOTES 1 All voltage values are with respect to the midpoint between Vcc and Vcc unless otherwise noted 2 The inputs are protected by back to back diodes Current limiting resistors are not used in order to achieve low noise Excessive input current will flow if a differential input voltage in excess of approximately 0 7 V is applied between the inputs unless some limiting resistance is used DISSIPATION RATING TABLE TA lt 25 C DERATING FACTOR TA 85 C TA 125 C POWER RAT
10. 37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 APPLICATION INFORMATION offset voltage and drift continued Thecircuitshown in Figure 38 measures offset voltage This circuit can also be used as the burn in configuration for the OP27 and OP37 with the supply voltage increased to 20 V R1 R3 10 kQ R2 200 Q and Ayp 100 R1 50 KQ R2 Vo 1000 V 100 0 o 1000 Vio R3 50 kQ 45V NOTE A Resistors must have low thermoelectric potential Figure 38 Test Circuit for Offset Voltage and Offset Voltage Temperature Coefficient unity gain buffer applications The resulting output waveform when R x 100 Q and the input is driven with a fast large signal pulse gt 1 V is shown in the pulsed operation diagram in Figure 39 Rf 2 8 V us Output OP27 Figure 39 Pulsed Operation During the initial fast feedthrough like portion of the output waveform the input protection diodes effectively short the output to the input and a current limited only by the output short circuit protection is drawn by the signal generator When Pe gt 500 Q the output is capable of handling the current requirements load current lt 20 mA at 10 V the amplifier stays in its active mode and a smooth transition occurs When Rf gt 2 kQ a pole is created with Rf and the amplifier s input capacitance creating additional phase shift and red
11. 9 REVISED AUGUST 1994 TYPICAL CHARACTERISTICST INPUT OFFSET CURRENT INPUT BIAS CURRENT VS VS FREE AIR TEMPERATURE FREE AIR TEMPERATURE 50 VCcCc 15V Vec 15V a 40 1 E t a o c 5 2 o a 30 2 g o a El sa 20 E OP27C G o OP37C G m 10 OP27A E OP37A E 0 75 50 25 0 25 50 75 100 125 75 50 25 0 25 50 75 100 125 TA Free Air Temperature C TA Free Air Temperature C Figure 4 Figure 5 COMMON MODE INPUT VOLTAGE RANGE LIMITS MAXIMUM PEAK OUTPUT VOLTAGE VS VS SUPPLY VOLTAGE LOAD RESISTANCE Negative Swing VICR 7 Common Mode Input Voltage Range Limits V Vom Maximum Peak Output Voltage V 0 5 10 15 20 0 1 1 10 Vcc Supply Voltage V RL Load Resistance kQ Figure 6 Figure 7 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 2 9 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICS OP27 MAXIMUM PEAK TO PEAK OUTPUT VOLTAGE VS FREQUENCY
12. ENT INPUT NOISE VOLTAGE VS SOURCE RESISTANCE 100 1k 10k Rs Source Resistance Figure 23 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 13 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICST OP27A OP27E OP37A OP37E OP27A OP27E OP37A OP37E EQUIVALENT INPUT NOISE VOLTAGE EQUIVALENT INPUT NOISE VOLTAGE vs vs TOTAL SUPPLY VOLTAGE FREE AIR TEMPERATURE 20 5 N Rs 20 0 N Vcec 15V E BW 1 Hz E Rs 209 gt TA 25 C gt BW 1 Hz c c o 15 L 4 s s f 1 kHz 3 10 2 3 f 1kHz 5 5 Q o E E t E o 2 S 5 m 2 3 3 l l gt gt 0 1 0 10 20 30 40 50 25 0 25 50 75 100 125 Vcc Vcc Total Supply Voltage V TA Free Air Temperature C Figure 24 Figure 25 OP27A
13. FFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 85 80 75 70 65 60 55 m Phase Margin 50 45 40 35 75 Vn Equivalent Input Noise Voltage uV TYPICAL CHARACTERISTICST OP27 PHASE MARGIN AND GAIN BANDWIDTH PRODUCT VS FREE AIR TEMPERATURE 11 Vec 15V 10 6 10 2 om 9 8 9 4 9 8 6 GBW f 100 kHz 8 2 7 8 7 4 7 50 25 0 25 50 75 100 125 TA Free Air Temperature C Figure 20 EQUIVALENT INPUT NOISE VOLTAGE VS BANDWIDTH 10 Vec t15V Rs 202 TA 25 C 0 1 0 01 0 1 1 10 Bandwidth kHz 0 1 Hz to frequency indicated Figu re 22 100 Gain Bandwidth Product MHz 80 75 m Phase Margin KA S OP37 PHASE MARGIN AND GAIN BANDWIDTH PRODUCT VS FREE AIR TEMPERATURE 85 80 75 70 GBW f 10 kHz 65 60 55 Gain Bandwidth Product MHz 50 45 40 50 25 0 25 50 75 100 125 Total Equivalent Input Noise Voltage nV MHz TA Free Air Temperature C Figure 21 TOTAL EQUIVAL
14. ING ABOVE T4 25 C POWER RATING POWER RATING PACKAGE 1050 mW 8 4 mW C 1375 mW 11 0 mW C 1000 mW 8 0 mW C d TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 3 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 recommended operating conditions Supply voltage VCC Supply voltage Voc Common mode input voltage Vic V Operating free air temperature TA 55 125 55 125 electrical characteristics at specified free air temperature Vcc 15 V unless otherwise noted OP37A L OP37C PARAMETER TEST CONDITIONS UNIT ce oh we Average temperature ay o coefficient of input Full range 1 8 uV C offset voltage Long term drift of input See Note 4 2 uV mo offset voltage 5 C EE llo Input offset current Vic 0 29 Lac Ip Input bias current Vo 0 Vic 0 Common mode input i voltage range 10 3 Full range to VICR Peak output voltage swing 1500 1500 RL21kQ Vo 10V RL 20 6 KQ Vo VCC 4V PRL gt 2kQ Vo 10V Emp E Large signal differential AVD voltage amplification RECH Vo 10V oHG 1000 1800 1500 Common mode input resistance TEN CMRR Common mode rejection um 126 120 i Supply voltage rejection
15. N PP input noise voltage See Figure 34 one 0 19 0 095 0 25 uy nV IHz OP37 operating characteristics over operating free air temperature range Vcc 15 V OP37A OP37E OP37C OP37G PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP MAX SR Slew rate AyD 2 5 RL22kQ 11 17 11 17 Peak to peak equivalent f20 1 Hz to 10 Hz Rg 209 VN PP input noise voltage See Figure 34 udi 0 09 0 25 a nV MHz Vn Equivalent input noise f 30 Hz Rs 200 31 45 33 56 voltage Gain bandwidth product 35 TEXAS INSTRUMENTS 2 6 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICS Table of Graphs vs Time after power on AVIO Change in input offset voltage vs Time long term drift i a nen soni eo ow Maximum peak ouputvotage vs Loadresitanes 7 EE vs Supply voltage AyD Differential voltage amplification vs Load resistance S vs Frequency 12 13 14 vs Temperature Slew rate vs Supply voltage vs Load resistance vs Bandwidth vs Source resistance Vn Equivalent input noise voltage vs Supply voltage vs Temperature vs Frequency DEE SS SE LE Small signal e 32 ulse response Large signal 31 33 35 TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 2 7 POS
16. OP27E OP37A OP37E EQUIVALENT INPUT NOISE VOLTAGE EQUIVALENT INPUT NOISE CURRENT vs vs FREQUENCY FREQUENCY 10 E Vec 15V X Vcc 15V gt Rs 209 BW 1 Hz z BW 1 Hz TA 25 C 1 TA 25 C 1 S 5 o o 2 2 o o z 1 N 2 a N E E B3 5 5 Im al c E E Hr 3 3 ei ei 1 f Corner 140 Hz c c gt 0 1 1 10 100 1000 10 100 1k 10k f Frequency Hz f Frequency Hz Figure 26 Figure 27 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS 2 14 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICST SHORT CIRCUIT OUTPUT CURRENT SUPPLY CURRENT VS VS ELAPSED TIME TOTAL SUPPLY VOLTAGE lt E 1 E 5 1 5 TA 125 C o o gt 2 2 T E 8 o6 1 o 9 0 1 2 3 4 5 5 15 25 35 45 t Time minutes Vcc Vcc Total Supply Voltage V Figure 28 Figure 29 OP27 OP27 VOLTAGE FOLLOWER VOLTAGE FOLLOWER SMALL SIGNAL LARGE SIGNAL PULSE RESPONSE PULSE RESPONSE 8 6 4 E gt 1 1 o 2 2 s P s o 5 5 e E 6 a 2 1 1 S 4 VCC 15 V _6 Ay z
17. REVISED AUGUST 1994 TYPICAL CHARACTERISTICS OP27 OP37 LARGE SIGNAL DIFFERENTIAL LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT VOLTAGE AMPLIFICATION AND PHASE SHIFT VS VS FREQUENCY FREQUENCY 25 80 60 80 a Vec t15V m Phase Shift Hu 1 ko 5 20 TA 25 C 100 5 50 100 E 3 2 2 15 120 40 120 Phase Shift z z zx S 10 mc 70 140 CS 30 140 E as d S as amp z 5 160 T 20 160 t e g e 2 0 180 10 180 a a 1 1 5 AvD 200 0 200 st 10 220 10 220 1 10 100 0 1 1 10 100 f Frequency Hz f Frequency MHz Figure 12 Figure 13 OP27A OP27E OP37A OP37E LARGE SIGNAL OP27A OP27E OP37A OP37E DIFFERENTIAL VOLTAGE AMPLIFICATION COMMON MODE REJECTION RATIO vs vs FREQUENCY FREQUENCY 140 140 m B Vcc 2 t15V 120 SB Vic 10 V 6 4 TA 25 C t 120 92 100 c 9 o g 2 100 D ka o 60 g OP37A E bd 1 40 E 80 o E E OP27A E a 20 1 1 60 a x gt 0 tc st z o 20 A0 0 31 1 10 100 1k 10k 1M 100 M 1k 10k 100k 1M 10M f Frequency Hz f Frenquency Hz Figure 14 Figure 15 Ra Ti
18. T OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 TYPICAL CHARACTERISTICST INPUT OFFSET VOLTAGE OF WARM UP CHANGE IN REPRESENTATIVE INDIVIDUAL UNITS INPUT OFFSET VOLTAGE VS VS FREE AIR TEMPERATURE ELAPSED TIME 100 Vec 15V Vec t15V 80 gt Ta 25 C OP27C 37C T gt 60 o o S OP27CP GP o 40 Sii d OP27A 37A 9 OP37CP GP c o Bs 9 5 o OP27E 37E 2 5 20 c amp E c o T 74 2 o OP27G 37G E AP EP gt 60 OP27C 37C o AP EP 1 o 80 gt lt 100 50 25 0 25 50 75 100 125 1 2 3 4 5 TA Free Air Temperature C Time After Power On minutes Figure 1 Figure 2 LONG TERM DRIFT OF INPUT OFFSET VOLTAGE OF REPRESENTATIVE INDIVIDUAL UNITS 0 2 u V mo Trend Line AVIO Change in Input Offset Voltage uV 0 1 2 3 4 5 6 7 8 Time months Figure 3 t Data for temperatures below 25 C and above 85 C are applicable to the OP27A OP27C OP37A and OP37C only d TEXAS INSTRUMENTS 2 8 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 198
19. e right to make changes to their products or to discontinue any product or service without notice and advise customers to obtain the latest version of relevant information to verify before placing orders that information being relied on is current and complete All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement including those pertaining to warranty patent infringement and limitation of liability TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty Specific testing of all parameters of each device is not necessarily performed except those mandated by government requirements CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH PERSONAL INJURY OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE CRITICAL APPLICATIONS TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER S RISK In order to minimize risks associated with the customer s applications adequate design and operating safeguards must be provided by the customer to minimize inherent or procedu
20. ficient of the OP27 and OP37 are permanently trimmed to a low level at wafer testing However if further adjustment of Vio is necessary using a 10 kO nulling potentiometer as shown in Figure 36 does not degrade the temperature coefficient ovo Trimming to a value other than zero creates an ajo of VIO 300 uV C For example if Vio is adjusted to 300 uV the change in oyjo is 1 uV C The adjustment range with a 10 kQ potentiometer is approximately 2 5 mV If a smaller adjustment range is needed the sensitivity and resolution of the nulling can be improved by using a smaller potentiometer in conjunction with fixed resistors The example in Figure 37 has an approximate null range of 200 uV 4 7 KQ 1kQ 15V Input Output Input 15V E Figure 36 Standard Input Offset Voltage Adjustment 15V Figure 37 Input Offset Voltage Adjustment With Improved Sensitivity offset voltage and drift Unless proper care is exercised thermoelectric effects caused by temperature gradients across dissimilar metals at the contacts to the input terminals can exceed the inherent temperature coefficient lt lt VIO of the amplifier Air currents should be minimized package leads should be short and the two input leads should be close together and at the same temperature d TEXAS INSTRUMENTS 2 18 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP
21. ral hazards Tl assumes no liability for applications assistance or customer product design TI does not warrant or represent that any license either express or implied is granted under any patent right copyright mask work right or other intellectual property right of TI covering or relating to any combination machine or process in which such semiconductor products or services might be or are used Tl s publication of information regarding any third party s products or services does not constitute Tl s approval warranty or endorsement thereof Copyright 1998 Texas Instruments Incorporated
22. ts as an additional zero to eliminate noise contributions from the frequency band below 0 1 Hz the test time to measure 0 1 Hz to 10 Hz noise should not exceed 10 seconds Measuring the typical 80 nV peak to peak noise performance of the OP27 and OP37 requires the following special test precautions 1 The device should be warmed up for at least five minutes As the operational amplifier warms up the offset voltage typically changes 4 uV due to the chip temperature increasing from 10 C to 20 C starting from the moment the power supplies are turned on In the 10 s measurement interval these temperature induced effects can easily exceed tens of nanovolts 2 For similar reasons the device should be well shielded from air currents to eliminate the possibility of thermoelectric effects in excess of a few nanovolts which would invalidate the measurements 3 Sudden motion in the vicinity of the device should be avoided as it produces a feedthrough effect that increases observed noise d TEXAS INSTRUMENTS 2 16 POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 APPLICATION INFORMATION 100 V He 90 B 80 70 60 50 40 Ayp Differential Voltage Amplification dB
23. ucing the phase margin A small capacitor 20 pF to 50 pF in parallel with R eliminates this problem d TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 2 19 POST OFFICE BOX 1443 9 HOUSTON TEXAS 77251 1443 OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G LOW NOISE HIGH SPEED PRECISION OPERATIONAL AMPLIFIERS SLOS100B FEBRUARY 1989 REVISED AUGUST 1994 APPLICATION INFORMATION 120 Noise Voltage nV 20 0 0 2 4 6 8 10 t Time seconds Type S Thermocouples 5 4 uV C at 0 C T 1 Cold Junction Circuitry To Gate Drive S Ayp 10 000 e 2 e Output ee e Typical d 100 ko Multiplexing 0 05 uF S FET Switches e e m H High Quality 109 Single Point Ground eee e e NOTE A If 24 channels are multiplexed per second and the output is required to settle to 0 1 accuracy the amplifier s bandwidth cannot be limited to less than 30 Hz The peak to peak noise contribution of the OP27 will still be only 0 11 uV which is equivalent to an error of only 0 02 C Figure 40 Low Noise Multiplexed Thermocouple Amplifier and 0 1 Hz To 10 Hz Peak to Peak Noise Voltage d TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 POST OFFICE BOX 1443 HOUSTON TEXAS 77251 1443 2 20 IMPORTANT NOTICE Texas Instruments and its subsidiaries TI reserve th

TEXAS INSTRUMENTS OP27A OP27C OP27E OP27G OP37A OP37C OP37E OP37G handbook

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