MAXIM MAX2057 handbook
Contents
1. MAXIM 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control 9 9 9 9 9 9 External Current Setting Resistors Provide Option for Operating VGA in Reduced Power Reduced able gain amplifier VGA is designed to operate in the 37dBm Constant OIP3 Over All Gain Settings put 1dB compression point of 23 8dBm The MAX2057 0 5dB Gain Flatness Over 100MHz Bandwidth range In addition the on chip analog attenuators yield features makes the 2057 an ideal for Two Gain Control Ranges 21dB and 42dB The MAX2057 is pin compatible with the MAX2056 Single 5V Supply Voltage layout is used for both frequency bands x 6mm x 0 8mm with an exposed pad Electrical per Mode General Description Features The MAX2057 general purpose high performance vari 1300MHz to 2700MHz RF Frequency Range 1300MHz to 2700MHz frequency range This device features 15 50 of gain 6dB of noise figure and an out 23 8dBm Output 1dB Compression Point also provides an exceptionally high OIP3 level of 15 5dB Typical Gain at Maximum Gain Setting 37dBm which is maintained over the entire attenuation infinite control and high attenuation accuracy over 6dB Noise Figure at Maximum Gain Setting Using selectable 21dB or 42dB control ranges Each of these 1 Attenuator DCS PCS cdma2000 W CDMA and PHS PAS trans Analog Gain Control mitter and power amplifier AGC circuits nalog Sonto 800 2 to 12. SUPPLY VOLTAGE vs RF FREQUENCY vs RF FREQUENCY 200 0 0 Ta 485 C E 8 3 E 5 5 5 E 190 s _ 3 amp 10 8 10 S N er N 5 B 45 15 Z 180 S 25 2 S 2 i gt 17 E a U E E 25 5 25 5 30 3 30 Ta 40 C 35 35 150 40 40 4750 4875 5 000 5125 5250 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 SUPPLY VOLTAGE V RF FREQUENCY MHz RF FREQUENCY MHz REVERSE ISOLATION GAIN vs GAIN CONTROL VOLTAGE GAIN vs RF FREQUENCY vs RF FREQUENCY 9 3 40 8 8 Ta 40 C B 5 7 E a B 35 2 g 5 TA 4325 z 5 S a Ta 85 6 2 30 9 25 40 1500 1700 1900 200 2300 2500 1500 1700 1900 2100 2300 2500 Venti V RF FREQUENCY MHz RF FREQUENCY MHz INPUT RETURN LOSS OUTPUT RETURN LOSS vs RF FREQUENCY vs RF FREQUENCY GAIN vs RF FREQUENCY 0 0 20 a 3 8 Ee MAXIMUM GAIN 5 3 5 3 45 5 QdB 1208 1508 1808 E 3 E E 10 GAIN REDUCTION S 10 a 10 15 Sd MAX GAIN z 2 2 5 S GAIN 3dB 6dB 9dB 1208 5 lt 25 25 AND 18dB GAIN REDUCTION et n S d E pom 608 GAIN REDUCTION 5 35 3dB GAIN REDUCTION 35 18dB GAIN REDUCTION 40 40 10 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz 4 AVLAZCLAM 1300MHz to 2700MHz Variable Gain Amp
3. VCNTL 1V to 4V Insertion Phase Change vs Gain Contro Note 1 Note 2 VCNTL 1V to 4V Total supply current reduces as R2 are increased Operating outside this range for extended periods may affect device reliability Limit pin input current to 40mA when Vcc is not present Operation outside this range is possible but with degraded performance of some parameters All limits include external component losses unless otherwise noted Noise figure increases by approximately for every 1dB of gain reduction f4 2100 2 2101 2 5dBm tone at OUT Switching time is measured from 50 of the control signal to when the RF output settles to x 1dB Note 3 Note 4 Note 5 Note 6 Note 7 MAXIM 3 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Typical Operating Characteristics One Attenuator Configuration Typical Application Circuit with one attenuator connected Vcc 5 0V R1 1 2kQ R2 2kQ fin 2100MHz maximum gain setting PouT 5dBm linearity measured at PouT 5dBm tone TA 25 C unless otherwise noted SUPPLY CURRENT INPUT RETURN LOSS OUTPUT RETURN LOSS vs
4. at www maxim ic com ZS0cXVM 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control ABSOLUTE MAXIMUM RATINGS Voe TO GIN VcNrL to GND with Voc applied Current into VcNrL pin Vcc grounded All Other Pins to 21 1 0 3V to Vcc 0 3V RF Input Power IN A ATTN_OUT OUT_A 20dBm RF Input Power AMP_IN natural convection OA dn re dune tod OJA 2 5bm s alHfloW iio reads etta atte ite Potts junction to exposed pad Operating Temperature Range Storage Temperature Range Junction Termpetratute cero Radio ie Lead Temperature soldering 10s Soldering Temperature reflow Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability DC ELECTRICAL CHARACTERISTICS Vcc 4 75V to 5 25V RF signals applied all input and output ports terminated with 500 TA 40 C to 85 C unless other wise noted Typical values are at Vcc 5
5. noted REVERSE ISOLATION INPUT RETURN LOSS OUTPUT RETURN LOSS vs RF FREQUENCY vs RF FREQUENCY vs RF FREQUENCY 0 5 g _ E amp 10 GAIN 8 10 a 6dB GAI S 8 15 S 15 5 z amp ce E EC 5 25 6dB 12dB 1808 24dB z 30dB GAIN REDUCTION 30 30 1208 1808 2448 3008 35 GAIN REDUCTION 35 40 40 1500 170 1900 2100 2300 2500 1500 170 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz REVERSE ISOLATION GAIN vs RF FREQUENCY vs RF FREQUENCY NOISE FIGURE vs RF FREQUENCY 20 80 11 0 3 MAXIMUM GAIN S 8 3 15 B B 10 5 5 3 70 3 3 10 30dB GAIN REDUCTIO 10 0 TA 85 C 2 amp 95 5 60 2 90 8 0 a 2 50 S 85 S 7 8 0 X 10 40 Qo TA 25 C 75 15 xX 70 30 MAXIMUM GAIN 20 6 5 30dB GAIN REDUCTION Ta 40 C 25 20 6 0 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz OUTPUT IP3 vs RF FREQUENCY OUTPUT IP2 vs RF FREQUENCY 40 5 75 E 70 E 6 36 z amp 60 z zZ 32 30 45 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500
6. to the ground plane of the board by using multiple vias under the device to provide the best RF and thermal conduction path Solder the exposed pad on the bottom of the device package to a PC board exposed pad Power Supply Bypassing Proper voltage supply bypassing is essential for high frequency circuit stability Bypass each Vcc pin with capacitors placed as close to the device as possible Place the smallest capacitor closest to the device Refer to the MAX2057 evaluation kit data sheet for more details Exposed Pad RF and Thermal Considerations The EP of the MAX2057 s 36 pin thin QFN EP package provides a low thermal resistance path to the die It is important that the PC board on which the IC is mounted be designed to conduct heat from this contact In addi tion the EP provides a low inductance RF ground path for the device The EP MUST be soldered to a ground plane on the PC board either directly or through an array of plated via holes Soldering the pad to ground is also critical for efficient heat transfer Use a solid ground plane wher ever possible 11 ZS0cXVM 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control 12 Pin Configuration Functional Diagram MAXIM MAX2057 ATTENUATION CONTROL CIRCUITRY Chip Information PROCESS BiCMOS Package Information For the latest package outline information and land patt
7. 000MHz VGA making this family of ampli Pin Compatible with MAX2056 800MHz to fiers ideal for applications where a common PC board 1000MHz RF VGA The MAX2057 operates from a single 5V supply and is available in a compact 36 pin thin QFN package 6mm formance is guaranteed over the extended 40 C to Lead Free Package Available 85 C temperature range Note Operation beyond this range is possible but has not been characterized Applications Station Transmitters and Power Amplifiers cdmaOne cdma2000 Base Station PARI TEMP RANGE EE Transmitters and Power Amplifiers MAX2057ETX 40 C to 85 C 36 Thin QFN EP 6 6 WCDMA LTE TD SCDMA and TD LTE Transmitters and Power Amplifiers 2057 40 C to 85 mm x omm PHS PAS Base Station Transmitters and Power Amplifiers EP Exposed pad Denotes a lead Pb free ROHS compliant package Transmitter Gain Control Tape ana reel package Receiver Gain Control Broadband Systems Automatic Test Equipment Pin Configuration Functional Diagram appear at end of data sheet Digital and Spread Spectrum Communication Systems Microwave Terrestrial Links cdmaOne is a trademark of CDMA Development Group cdma2000 is a registered trademark of Telecommunications Industry Association MAXIS Maxim Integrated Products 1 For pricing delivery and ordering information please contact Maxim Direct at 1 888 629 4642 or visit Maxim s website
8. 0V TA 25 C unless otherwise noted CONDITIONS MIN TYP MAX PARAMETER Supply Voltage 5 5 25 Supply Current R1 1 2kQ Note 1 R1 2kQ Note 1 Rset1 Current Rset2 Current R1 1 2kQ R2 2kQ Note 1 Gain Control Voltage Range Note 2 Gain Control Pin Input Resistance VCNTL 1V to 4 5V RECOMMENDED AC OPERATING CONDITIONS PARAMETER Frequency Range Note 3 AC ELECTRICAL CHARACTERISTICS CONDITIONS MIN TYP MAX UNITS 1300 2700 MHz Typical Operating Circuit with one attenuator connected Vcc 4 75V to 5 25V TA 40 C to 85 C fin 1700MHz to 2500MHz unless otherwise noted Typical values are at Vcc 5 0V R1 1 2kQ R2 2kQ Pour 5dBm fin 2100MHz 1V 500 system impedance second attenuator is not connected TA 25 C unless otherwise noted Note 4 PARAMETER CONDITIONS 25 5 0V fin 2100 25 Vcc 5 0V fin 1560 25 Vcc 5 0V fin 1500 25 5 0V fin 1450 25 C to 40 C Maximum Gain Variation Ta 25 C to 85 C MAXIM 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control AC ELECTRICAL CHARACTERISTICS continued Typical Operating Circuit with one attenuator connected Vcc 4 75V to 5 25V TA 40 C to 85 C fin 1700MHz to 2500MHz unless otherwise noted Typical values are at V
9. RF FREQUENCY MHz RF FREQUENCY MHz 8 MAXIM 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Pin Description FUNCTION 1 3 4 6 7 9 10 12 14 18 19 21 24 27 28 30 31 33 34 36 Ground Connect to the board s ground plane using low inductance layout techniques Second Attenuator Output Internally matched to 50Q over the operating frequency band Connect to IN through a DC blocking capacitor if greater than 21dB of gain control range is required No connection is required if the second attenuator is not used Power Supply Bypass each pin to GND with capacitors as shown in the Typical Application Circuit Place capacitors as close to the pin as possible Second Attenuator Input Internally matched to 500 over the operating frequency band Connect to a 509 RF source through a DC blocking capacitor if greater than 21dB of gain control range is required No connection is required if the second attenuator is not used Analog Gain Control Input Limit voltages applied to this pin to a 1V to 4 5V range when Vcc is present to ensure device reliability First Stage Amplifier Bias Current Setting Connect to GND through a 1 2kQ resistor Second Stage Amplifier Bias Current Setting Connect to GND through a 2kQ resistor RF Output Internally matched to 50Q over the operating frequency band Requires a DC blocking capacitor and a shunt matching capacitor Amplifier Inp
10. at has been optimized to provide high gain high IP3 low noise figure and low power consumption The bias current of each amplifier stage can be adjusted by individual external resistors to further reduce power consumption for applications that do not require high linearity MAXIM 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Table 1 Typical Application Circuit Component Values DESIGNATION VALUE TYPE icrowave capacitors 0402 icrowave capacitors 0402 C1 C3 C5 C7 C10 22pF C2 C4 C6 C8 C9 1000pF icrowave capacitors 0603 icrowave capaci 0402 4 196 resistor 04 4 C13 C14 C15 resistor 04 Applications Information Analog Attenuation Control A single input voltage at the VCNTL pin adjusts the gain of the MAX2057 Up to 21aB of gain control range is provided through a single attenuator At the maximum gain setting each attenuator s insertion loss is approxi mately 2 2dB With the single attenuator at the maximum gain setting the device provides a nominal 15 of cascaded gain and 6dB of cascaded noise figure If a larger gain control range is desired a second on chip attenuator can be connected in the signal path to provide an additional 21dB of gain control range With the second attenuator connected at the maximum gain setting the device typically exhibits 13 3dB of cascad ed gain Note that the VCNTL pin simultane
11. c 35 60 5 z 5 34 5 5 o S 34 S 55 32 33 50 30 32 45 0 5 10 15 20 6 3 0 3 6 9 1 1500 1700 1900 2100 2300 2500 ATTENUATION dB OUTPUT POWER PER TONE dBm RF FREQUENCY MHz MAXIM 5 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Typical Operating Characteristics continued One Attenuator Configuration Typical Application Circuit with one attenuator connected Vcc 5 0V R1 1 2kQ R2 2kQ fin 2100MHz maximum gain setting PouT 5dBm linearity measured at PouT 5dBm tone TA 25 C unless otherwise noted OUTPUT IP2 vs RF FREQUENCY INPUT IP2 vs ATTENUATION OUTPUT IP2 vs ATTENUATION 75 2 70 8 70 T 70 1 65 3 3 g 6 60 65 60 5 EZ 5 5 5 O 55 50 o 50 45 45 40 55 1500 170 1900 2100 2300 2500 0 5 10 15 20 0 5 10 15 20 RF FREQUENCY MHz ATTENUATION dB ATTENUATION dB OUTPUT P1dB vs RF FREQUENCY OUTPUT P1dB vs RF FREQUENCY 2057 toc22 MAX2057 t0c23 ans ues OUTPUT P1dB dBm B OUTPUT P1dB dBm B 20 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz 6 MAXIM 1300MH
12. cc 5 0V R1 1 2kQ R2 2kQ Pour 5dBm fin 2100 2 VCNTL 1V 500 system impedance second attenuator is not connected TA 25 C unless otherwise noted Note 3 PARAMETER CONDITIONS Reverse Isolation Noise Figure Output 1dB Compression Point Output 2nd Order Intercept Point From maximum gain to 15dB attenuation measured at f4 fo Note 6 Output 3rd Order Intercept Point From maximum gain to 15dB attenuation Note 5 Output 3rd Order Intercept Point Ta 25 C to 85 C ZS0cXVM Variation Over Temperature TA 25 C to 40 C 2nd Harmonic From maximum gain to 15dcB attenuation Pour 5dBm From maximum gain to 15dcB attenuation Pour 5dBm fin 1700MHz to 2200MHz VoNIL 1V to 4V fin 1450MHz to 1560MHz VoNIL 1V to 4V 3rd Harmonic One attenuator Two attenuators One attenuator Two attenuators RF Gain Control Range Maximum RF Gain Control Slope Maximum ieee vs gain control voltage Gain Flatness Over 100MHz Bandwidth Attenuator Switching Time Peak to peak for all settings 15dB attenuation change Note 7 Second attenuator IN_A OUT_A Entire band all gain settings Entire band all gain settings Input output 50Q lines de embedded Attenuator Insertion Loss Input Return Loss Output Return Loss Group Delay Group Delay Flatness Over 100MHz Bandwidth Group Delay Change vs Gain Contro Peak to peak
13. erns go to www maxim ic com packages Note that a or in the package code indicates RoHS status only Package drawings may show a different suffix character but the drawing pertains to the package regardless of RoHS status PACKAGE PACKAGE OUTLINE LAND TYPE CODE NO PATTERN NO 36 TQFN EP T3666 2 21 0141 90 0049 MAXIM 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Revision History REVISION REVISION DESCRIPTION PAGES NUMBER DATE CHANGED 0 1 05 Initial release Updated General Description Features Applications Ordering Information DC Electrical Characteristics AC Electrical Characteristics Detailed Description and Analog Attenuation Control sections and added Recommended AC Operating Conditions section Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product No circuit patent licenses are implied Maxim reserves the right to change the circuitry and specifications without notice at any time Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 13 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products Inc ZS0cXVM
14. lifier with Analog Gain Control Typical Operating Characteristics continued One Attenuator Configuration Typical Application Circuit with one attenuator connected Vcc 5 0V R1 1 2kQ R2 2kQ fin 2100MHz maximum gain setting PouT 5dBm linearity measured at PouT 5dBm tone TA 25 C unless otherwise noted ZS0cXVM REVERSE ISOLATION vs RF FREQUENCY NOISE FIGURE vs RF FREQUENCY NOISE FIGURE vs RF FREQUENCY 60 2 80 z 8 0 18dB GAIN REDUCTION 8 E 55 8 75 L 75 g 3 Ta 4859C 3 3 amp 50 70 70 4 75V S 45 iw 65 65 a a im Z 40 2 60 2 60 z 3 55 Ta Ta 425 C 55 MAXIMUM GAIN Voc 5 00V 30 50 50 Voc 5 25V 25 45 Ta 40 C 45 20 40 4 0 4500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz OUTPUT vs RF FREQUENCY OUTPUT vs RF FREQUENCY INPUT vs ATTENUATION 40 2 40 4 38 38 5 Ta 325 8 zm S 36 S 36 ES Eg g p a 5 gt 5 29 34 5 34 26 32 32 23 30 30 20 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 20 RF FREQUENCY MHz RF FREQUENCY MHz ATTENUATION dB OUTPUT vs ATTENUATION OUTPUT IP3 vs OUTPUT POWER OUTPUT IP2 vs RF FREQUENCY 40 38 75 2 5 E 37 2 70 3 36 6 2 36 RS 5 g Ed N
15. ously adjusts both on chip attenuators The VCNTL input voltage drives a high impedance load gt 50kQ It is suggested that a current limiting resistor be included in series with this connection to limit the input current to less than 40mA should the control volt age be applied when Vcc is not present series resis tor of greater than 2000 will provide complete protection for 5V control voltage ranges Limit VCNTL input voltages to a 1 0V to 4 5V range when Vcc is present to ensure the reliability of the device MAXIM Amplifier Bias Current The MAX2057 integrates a two stage amplifier to simul taneously provide high gain and high IP3 Optimal per formance is obtained when R1 and R2 are equal to 1 2 and 2kQ respectively The typical supply current is 180mA and the typical output IP3 is 37dBm under these conditions Increasing R1 and R2 from the nominal values of 1 2kQ and 2kQ reduces the bias current of each amplifier stage which reduces the total power consumption and IP3 of the device This feature can be utilized to further decrease power consumption for applications that do not require high Layout Considerations A properly designed PC board is an essential part of any RF microwave circuit Keep RF signal lines as short as possible to reduce losses radiation and induc tance For best performance route the ground pin traces directly to the exposed pad underneath the package This pad MUST be connected
16. ut Internally matched to 500 over the operating frequency band Connect to ATTN OUT through DC blocking capacitor ATTN OUT Attenuator Output Internally matched to 500 over the operating frequency band Connect to AMP IN through a DC blocking capacitor RF Input Internally matched to 500 over the operating frequency band Connect to a 500 RF source through a DC blocking capacitor if the second attenuator is not used Exposed Pad This pad affects RF performance and provides heat dissipation This pad MUST be MAXIM soldered evenly to the board s ground plane for proper operation ZS0cXVM 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control RF INPUT MAXI AVI MAX2057 ATTENUATION CONTROL CIRCUITRY RF OUTPUT 0 06in LONG FR4 500 C17 TRANSMISSION LINE NOTE CONNECT THE INPUT ACCORDING TO THE SOLID BOLD LINE IF ONE ATTENUATOR IS USED CONNECT THE INPUT ACCORDING TO THE BROKEN LINE IF TWO ATTENUATORS ARE USED Figure 1 Typical Application Circuit Detailed Description The MAX2057 general purpose high performance VGA with analog gain control is designed to interface with 50Q systems operating in the 1300MHz to 2700MHz frequency range The MAX2057 integrates two attenuators to provide 21dB 42dB of precision analog gain control as well 10 as a two stage amplifier th
17. z to 2700MHz Variable Gain Amplifier with Analog Gain Control Typical Operating Characteristics Two Attenuator Configuration Typical Application Circuit with two attenuators connected Vcc 5 0V R1 1 2kQ R2 2kQ fin 2100MHz maximum gain setting PouT 5dBm linearity measured at PouT 5dBm tone TA 25 C unless otherwise noted INPUT RETURN LOSS OUTPUT RETURN LOSS vs RF FREQUENCY vs RF FREQUENCY 0 5 0 5 E 5 E E E amp 10 5 10 Ta 40 C wm w B15 8 1 5 20 go TA 485 C E ur Ta 425 C E 2 Ty 485 C 3 Ta 25 S 30 35 35 40 40 1500 1700 1900 2100 2300 2500 1500 1700 1900 2100 2300 2500 RF FREQUENCY MHz RF FREQUENCY MHz GAIN vs GAIN CONTROL VOLTAGE GAIN vs RF FREQUENCY 15 s 17 amp TA 40 C 2 E 5 25 15 TA 85 C g 5 g 13 z z 5 5 15 11 25 9 25 7 10 15 20 25 30 35 40 1500 1700 1900 2100 2300 2500 Venti V RF FREQUENCY MHz AVLAXLAVI 7 ZS0cXVM 2057 1300MHz to 2700MHz Variable Gain Amplifier with Analog Gain Control Typical Operating Characteristics continued Two Attenuator Configuration Typical Application Circuit with two attenuators connected Vcc 5 0V R1 1 2kQ R2 2kQ fin 2100MHz maximum gain setting PouT 5dBm linearity measured at PouT 5dBm tone Ta 25 C unless otherwise
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MAXIM MAX2057 handbook