ANALOG DEVICES ADCMP341/ADCMP343 handbook
Contents
1. 2 5V Vp 2 5V Vpp 1 7V Vpp 1 7V T T 100 100 z z W W 72 w SG SG 2 2 o o amp 10 amp 10 2 o o 1 T 1 a 0 001 0 01 0 1 1 10 100 5 0 001 0 01 0 1 1 10 100 5 OUTPUT SINK CURRENT mA 8 OUTPUT SINK CURRENT mA 8 Figure 12 Supply Current vs Output Sink Current Figure 15 Supply Current vs Output Sink Current 10k Vpp 5 0V CURRENT IS GOING Vpp 3 3V Ta 125 C OUT OF THE DEVICE Vpop 2 5V iced 0v Vpp 17V 1k 1B T lt E 5 z H 100 E S S 3 a o TA 85 C gt e z m 10 n LE 2 1 a i z 1 E 0 1 RB 0 001 0 01 0 1 1 10 100 amp 0 3 5 OUTPUT SINK CURRENT mA E INPUT VOLTAGE V 2 Figure 13 Supply Current vs Output Sink Current Figure 16 Below Ground Input Bias Current 10 T T TA 125 C E TAS 4125 C E 1 5 Ta 85 C g S Ty 25 C S Ta 85 C o Ta 40 C a o lt E m m TA 25 C a E o n n z z CURRENT IS POSITIVE GOING INTO THE DEVICE CURRENT IS GOING INTO THE DEVICE Vpp 5V Vpp 5V 0V lt Vig lt 1V Vig gt 1V is 0 01 0 0 2 0 4 0 6 0 8 10 3 1 2 3 4 55 INPUT VOLTAGE V E INPUT VOLTAGE V 5 Figure 14 Low Level Input Bias Current Figure 17 High Level Input Bias Current Rev 0 Page 7 of 12 ADCMP341 ADCMP343 OUTPUT SATURATION VOLTAGE mV OUTPUT SATURATION VOLTAGE mV SHORT CIRCUIT CURRENT mA 1000 Ta 25 C Von BON Von 3 3V Vpp 2 5V Vp 1 8V2. ADCMP341 ADCMP343 LH NON INV LHINV HL NON INV HL INV T T EI z g a E d z 6 E H lt S e z E lt a ul g 7 D x INPUT OVERDRIVE mV 8 OUTPUT PULL UP RESISTOR k0 8 Figure 24 Propagation Delay vs Input Overdrive Figure 26 Rise and Fall Times vs Output Pull Up Resistor NON INV OUTA R1 22kQ 1 R2 2 2kQ i R3 6 2kQ ER INV OUTB Vin INA INB h 1 1 50 0mV CH2 5 00V M20 0us CHIS 7mV 2 2 00V CH2 500mV M100ms 8 CH3 5 00V 8 Figure 25 Noninverting and Inverting Comparators Propagation Delay Figure 27 Hysteresis Programmed to 513 mV at Top of Input String Hysteresis at ADCMP341 Pins 104 mV Rev 0 Page 9 of 12 ADCMP341 ADCMP343 APPLICATION INFORMATION The ADCMP341 ADCMP343 are dual low power comparators with a built in 400 mV reference that operates from 1 7 V to 5 5 V The comparators are 0 275 accurate with fully programmable hysteresis implemented using a new technique of a three resistor string on the input These open drain outputs are capable of sinking up to 40 mA COMPARATORS AND INTERNAL REFERENCE Each of the comparators has one input available externally the other comparator inputs are connected internally to the 400 mV reference The ADCMP3
3. 100 10 0 001 0 01 0 1 1 10 OUTPUT SINK CURRENT mA Figure 18 Output Saturation Voltage vs Output Sink Current 1000 Ta 85 C Vpp 5 0V Mons 3 3V Vpp 2 5V Mon 1 8V 100 10 1 0 001 0 01 0 1 1 10 OUTPUT SINK CURRENT mA Figure 19 Output Saturation Voltage vs Output Sink Current 0 2 4 OUTPUT VOLTAGE V Figure 20 Short Circuit Current vs Output Voltage 06500 017 06500 019 06500 021 Rev 0 Page 8 of 12 SHORT CIRCUIT CURRENT mA OUTPUT SATURATION VOLTAGE mV OUTPUT LEAKAGE CURRENT nA 1000 TA 40 C Vpp 5 0V Vp 3 3V Vpp 2 5V Mon 1 8V 100 10 0 001 0 01 0 1 1 10 OUTPUT SINK CURRENT mA Figure 21 Output Saturation Voltage vs Output Sink Current Ta 25 C TA 40 C OUTPUT VOLTAGE V Figure 22 Short Circuit Current vs Output Voltage OUTPUT VOLTAGE V Figure 23 Output Leakage Current vs Output Voltage 06500 018 06500 020 06500 022
4. the upper tap point of the resistor string Connect internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled by the output level on Comparator A The other input of Comparator A is connected to a 400 mV reference 3 INA_L Monitors Analog Input Voltage on Comparator A Connect to the lower tap point of the resistor string Connect internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled by the output level on Comparator A The other input of Comparator A is connected to a 400 mV reference 4 GND Ground 5 INB_L Monitors Analog Input Voltage on Comparator B Connect to the lower tap point of the resistor string Connect internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled by the output level on Comparator B The other input of Comparator B is connected to a 400 mV reference 6 INB_U Monitors Analog Input Voltage on Comparator B Connect to the upper tap point of the resistor string Connect internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled by the output level on Comparator B The other input of Comparator B is connected to a 400 mV reference 7 Von CAVA lysPinr a d 8 OUTB Open NY for Comparator B e Rev 0 Page 5 of 12 ADCMP341 ADCMP343 TYPICAL PERFORMANCE CHARACTERISTICS 404 FOUR TYPICAL PARTS Vp
5. 00 4 405 6 mV Voo 3 3 V 40 C lt TA 125 C 393 2 400 4 405 8 mV Voo 5 5 V 40 C Ta 125 C Threshold Voltage Accuracy 0 275 96 Ta 25 C Voo 3 3 V Threshold Voltage Temperature Coefficient 16 ppm C POWER SUPPLY Supply Current 6 5 9 yA Voo 1 7 V 7 0 10 uA Voo 5 5 V INPUT CHARACTERISTICS Input Bias Current 0 01 5 nA Voo 1 7 V Vin Voo 0 01 5 nA Voo 1 7 V Vin 0 1 V OPEN DRAIN OUTPUTS Output Low Voltage l T40 220 mV Vip 1 7 V lour 3 mA LA 140 220 nV M 5 5 V lour 2 5 mA Output Leakage Current E 601 1 LA r Voo 1 7 V Vout Mon 0 01 1 uA Voo 1 7 V Vour 5 5 V DYNAMIC PERFORMANCE High to Low Propagation Delay 10 us Voo 5 V Vor 400 mV Low to High Propagation Delay 8 us Voo 5 V Vou 0 9 X Voo Output Rise Time 0 5 us Voo 5 V Vo 0 1 to 0 9 x Voo Output Fall Time 0 07 us Voo 5 V Vo 0 1 to 0 9 x Voo TRL 100 KO Vo 2 V swing 10 mV input overdrive 3 Vin 40 mV overdrive R z 10kQ Rev 0 Page 3 of 12 ADCMP341 ADCMP343 ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS dd er Rating Oza is specified for the worst case conditions that is a device Vos 03Vto46V soldered in a circuit board for surface mount packages INA_U INA_L INB_U INB_L 0 3 V to 6V Table 3 Thermal Resistance OUTA OUTB 0 3V to 6 V Package Type Em Unit Operating Temperature Range 40 C to 125 C 8 Lead SOT 23 2115 C
6. 41 has two noninverting comparators and the ADCMP343 has two inverting comparators There are two input pins available to each comparator However these two input pins tINx_U INx_L connect to the same input leg of the comparator via a muxing system This is to provide fully programmable rising and falling trip points The output of the comparator determines which pin is connected to the input of the same comparator Using Figure 28 as an example when OUTA is high INA_U is connected to the comparator input When the input voltage drops and passes below the 400 mV reference the output goes low This in turn disconnects INA_U from the comparator and connects INA_L This leg of the string is at a lower voltage and thus instantaneously the effect of hysteresis is applied Therefore using a resistor string on the input asshown in Figure 28 the voltages for the rising and falling trip points can be programmed by selecting the appropriate resistors in the string POWER SUPPLY The ADCMP341 ADCMP343 are designed to operate from 1 7 V to 5 5 V A0 1 uF decoupling capacitor is recommended between Vppb and GND INPUTS The comparator inputs are limited to the maximum Von voltage range The voltage on these inputs can be above Vp but never above the maximum allowed Vpn voltage OUTPUTS The open drain comparator outputs are limited to the maximum specified Von voltage range regardless of the Von voltage These outputs are capable of
7. ANALOG Dual 0 275 Comparators and Reference with Programmable Hysteresis ADCMP341 ADCMP343 DEVICES FEATURES 400 mV 0 275 threshold User programmable hysteresis via resistor string Supply range 1 7 V to 5 5V Low quiescent current 6 5 pA typical Input range includes ground Low input bias current x5 nA maximum Open drain outputs Supports wired AND connections Input polarities ADCMP341 noninverting ADCMP343 inverting Small SOT 23 package APPLICATIONS Portable applications Li lon monitoring Handheld instruments LED relay driving Optoisolator driving Control systems e a GENERAL DESCRIPTION I f l The ADCMP341 ADCMP343 consist of two low power high accuracy comparators with a 400 mV reference in an 8 lead SOT 23 package Operating within a supply range of 1 7 V to 5 5 V the devices only draw 6 5 uA typical making them ideal for low voltage system monitoring and portable applications Hysteresis is determined using three resistors in a string configura tion with the upper and lower tap points connected to the INA_U and INA_L pins of each comparator respectively The state of the outputs of the comparators selects which pin is internally connected to the comparators input Therefore a change of state in the comparators output results in one of the inputs being switched in to the comparator and the other being switched out This provides the user with a fully flexible and accurate method of setting th
8. W Storage Temperature Range 65 C to 150 C Lead Temperature Soldering 10 sec 300 C ESD CAUTION Vapor Phase 60 sec 215 C ESD electrostatic discharge sensitive device Infrared 15 sec 220 C Charged devices and circuit boards can discharge A without detection Although this product features Stresses above those listed under Absolute Maximum Ratings patented or proprietary protection circuitry damage g ne may occur on devices subjected to high energy ESD may cause permanent damage to the device This is a stress i A Therefore proper ESD precautions should be taken to rating only functional operation of the device at these or any avoid performance degradation or loss of functionality other conditions above those indicated in the operational section of this specification is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability ANW D ALI Rev 0 Page 4 of 12 ADCMP341 ADCMP343 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS OUTA 1 e 8 OUTB INA U 2 ADCMP341 Von INA L 3 GND 4 TOP VIEW Not to Scale e INB U 5 NB L 06500 003 06500 004 Figure 4 ADCMP341 Pin Configuration Figure 5 ADCMP343 Pin Configuration Table 4 Pin Function Descriptions Pin No Mnemonic Description 1 OUTA Open Drain Output for Comparator A 2 INA_U Monitors Analog Input Voltage on Comparator A Connect to
9. e hysteresis One input of each comparator is internally connected to the reference The other input is available externally via an internal mux through pins XINA U or INA_L The state of the output determines which of these pins is connected at any one time The comparator outputs are open drain with the output stage sinking capability guaranteed greater than 5 mA over temperature The ADCMP341 has noninverting inputs and the ADCMP343 has inverting inputs The devices are suitable for portable commercial industrial and automotive applications Rev 0 Information fumished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties that may result from its use Specifications subject to change without notice No license is granted by implication or otherwise under any patent or patent rights of Analog Devices Trademarks and registered trademarks are the property of their respective owners FUNCTIONAL BLOCK DIAGRAMS Vpp QO ADCMP341 VINB INB L Q 06500 001 06500 002 R1 22kQ R2 2 2kO R3 6 2kO 06500 029 2 00V CH2 500mV M100ms Figure 3 Hysteresis programmed to 513 mV amp Vin on ADCMP34 One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 www analog com Fax 781 461 3113 2007 Analog Devices Inc All right
10. p 5V 50 402 40 30 400 20 PERCENT OF UNITS 398 10 RISING INPUT THRESHOLD VOLTAGE mV 0 396 40 20 0 20 40 60 80 100 120 TEMPERATURE C 394 395 396 397 398 399 400 401 402 403 404 405 406 RISING INPUT THRESHOLD VOLTAGE mV 06500 005 06500 006 Figure 6 Distribution of Rising Input Threshold Voltage Figure 9 Rising Input Threshold Voltage vs Temperature 401 S E uj 400 i 4 t TA 40 C O 399 t sss Tes gt Ty 25 C a m d Ty 85 C o z o 398 A Ta 125 C S o E E 397 D a I a H zZ Q 396 o E 395 x 17 22 27 32 37 42 47 52 578 15 16 17 18 19 20 21 22 23 24 25 8 SUPPLY VOLTAGE V Ed SUPPLY VOLTAGE V 8 Figure 7 Rising Input Threshold Voltage vs Supply Voltage Figure 10 Minimum Supply Voltage NO LOAD CURRENT T gt E EI E E z z WW Lu P 72 a t gt 2 o o 2 z n n n n 2 o o Tas 17 22 27 32 37 42 47 52 3 5 SUPPLY VOLTAGE V E SUPPLY VOLTAGE V 8 Figure 8 Quiescent Supply Current vs Supply Voltage Figure 11 Start Up Supply Current Rev 0 Page 6 of 12 ADCMP341 ADCMP343 1000 1000 Vpp 5 0V Vpp 5 0V Vp 3 3V Vp 3 3V Vpp
11. s reserved ADCMP341 ADCMP343 TABLE OF CONTENTS Feat res ee 1 Typical Performance Characteristics sse 6 Applications 25 irte teer ee 1 Application Iotormation eene 10 General Descriptions etes eet ger 1 Comparators and Internal Reference Een 10 Functional Block Diagrams sette 1 Power Supp lyin ede t Peter i ta evidens 10 REVISION History enee 2 Inputs cesse eoru ees cA eed 10 ele 3 RE 10 Absolute Maximum Ratings seen 4 Programming Hysteresis ee 10 Thermal Characteristics unenee 4 Layout Recommendations seen 10 BLUE euer 4 Outline Dimensions eerte a eb ie estate 11 Pin Configurations and Function Descriptions s ssssssss101 5 Ordering Guide ete e quant 11 REVISION HISTORY 2 07 Revision 0 Initial Version WA D ALI Rev 0 Page 2 of 12 ADCMP341 ADCMP343 SPECIFICATIONS Vpp 1 7 V to 5 5 V 40 C Ta 125 C unless otherwise noted Table 1 Parameter Min Typ Max Unit Test Conditions Comments THRESHOLD Threshold Voltage 396 6 400 4 404 3 mV Vop 1 7 V Ta 25 C 399 3 400 4 401 5 mV Voo 3 3 V Ta 25 C 398 5 400 4 402 2 mV Voo 5 5 V Ta 25 C 395 0 400 4 405 8 mV Voo 1 7 V 0 C lt Ta lt 70 C 397 4 400 4 403 4 mV Voo 3 3 V 0 C lt Ta lt 70 C 396 9 400 4 403 7 mV Voo 5 5 V 0 C lt Ta lt 70 C 391 2 400 4 407 7 mV Voo 1 7 V 40 C lt Ta 125 C 393 4 4
12. sinking up to 40 mA Outputs can be tied together to provide a common output signal PROGRAMMING HYSTERESIS When choosing the resistor values the input bias current must be considered as a potential source of error Begin by choosing a resistor value for R3 which takes into account the acceptable error introduced by the maximum specified input bias current To reduce this error the current flowing through the Resistor R3 should be considerably greater than the input bias current Ig gt gt I pias R3 is therefore R3 V Rer I R3 Now R2 can be calculated from the following R Visie E V FALLING V FALLING R2 R1 can then be calculated using the following equation Vonn Rl S RISING R2 Maer where Var is the specified on chip reference Isnsis the maximum specified input bias current R1 R2 and R3 are the three resistors as shown in Figure 28 In is the current flowing through R3 VraLuvc is the desired falling trip voltage and lower of the two Vrisine is the desired rising trip voltage and higher of the two 06500 027 Figure 28 Programming Hysteresis Example LAYOUT RECOMMENDATIONS Correct layout is very important to increase noise immunity Long tracks from the input resistors to the device can lead to noise being coupled onto the inputs To avoid this it is best to place the input resistors as close as possible to the device It is also recommended that a GND plane is used under
13. this layout The combination of small hysteresis and the use of a large R3 resistor further increases susceptibility to noise In this case a decoupling capacitor CA CB may be required on the INx_U node to help reduce any noise A recommended layout example can be seen in Figure 29 GND Vpp OUTA c1 OUTB INA INB RIA RIB R2A R2B R3A Ui R3B CA CB 2 Figure 29 Recommended Layout Example Rev 0 Page 10 of 12 ADCMP341 ADCMP343 OUTLINE DIMENSIONS e 2 90 BSC 1 60 BSC 2 80 BSC PIN 1 INDICATOR 0 65 BSC 115 0 90 j oasmax A 0 38 L 0 22 COMPLIANT TO JEDEC STANDARDS MO 178 BA Figure 30 8 Lead Small Outline Transistor Package SOT 23 145MAX 022 i 008 y re SEATING PLANE 0 RJ 8 Dimensions shown in millimeters 0 60 gt j e 045 0 30 ORDERING GUIDE Model Temperature Range Package Description Package Option Branding ADCMP341YRJZ REEL7 40 C to 125 C 8 Lead SOT 23 RJ 8 M8Y ADCMP343YRJZ REEL7 40 C to 125 C 8 Lead SOT 23 RJ 8 M91 Z Pb free part i Rev 0 Page 11 of 12 D ADCMP341 ADCMP343 NOTES INN D ALI 2007 Analog Devices Inc All rights reserved Trademarks and ANALOG registered trademarks are the property of their respective owners D06500 0 2 07 0 DEVICES www analo g com Rev 0 Page 12 of 12
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ANALOG DEVICES ADCMP341/ADCMP343 handbook