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MAX4073HAUT+T

hotMAX4073HAUT+T

MAX4073HAUT+T

For Reference Only

Part Number MAX4073HAUT+T
Manufacturer Maxim Integrated
Description IC OPAMP CUR SENS 1.6MHZ SOT23-6
Datasheet MAX4073HAUT+TDatasheet
Package SOT-23-6
In Stock 2296 piece(s)
Unit Price $ 0.9425 *
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MAX4073HAUT+T

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MAX4073HAUT+TSpecifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Datasheet MAX4073HAUT+TDatasheet
PackageSOT-23-6
Series-
Amplifier TypeCurrent Sense
Number of Circuits1
-3db Bandwidth1.6MHz
Current - Input Bias40µA
Voltage - Input Offset1mV
Current - Supply500µA
Voltage - Supply, Single/Dual (��)3 V ~ 28 V
Operating Temperature-40°C ~ 125°C
Mounting TypeSurface Mount
Package / CaseSOT-23-6
Supplier Device PackageSOT-23-6

MAX4073HAUT+TDatasheet

Page 1

Page 2

General Description The MAX4073 low-cost, high-side current-sense ampli- fier features a voltage output that eliminates the need for gain-setting resistors making it ideal for cell phones, notebook computers, PDAs, and other systems where current monitoring is crucial. High-side current moni- toring does not interfere with the ground path of the battery charger making the MAX4073 particularly useful in battery-powered systems. The input common-mode range of +2V to +28V is independent of the supply volt- age. The MAX4073’s wide 1.8MHz bandwidth makes it suitable for use inside battery-charger control loops. The combination of three gain versions and a selec- table external-sense resistor sets the full-scale current reading. The MAX4073 offers a high level of integra- tion, resulting in a simple and compact current-sense solution. The MAX4073 operates from a +3V to +28V single sup- ply and draws only 0.5mA of supply current. This device is specified over the automotive operating tem- perature range (-40°C to +125°C) and is available in a space-saving 5-pin SC70 package (half the size of the SOT23). For a similar device in a 6-pin SOT23 with a wider com- mon-mode voltage range (0 to +28V), see the MAX4173 data sheet. Applications Cell Phones Notebook Computers Portable/Battery-Powered Systems Smart Battery Packs/Chargers PDAs Power Management Systems PA Bias Control General System/Board-Level Current Monitoring Precision Current Sources Features ♦ Low-Cost, Compact, Current-Sense Solution ♦ Three Gain Versions Available +20V/V (MAX4073T) +50V/V (MAX4073F) +100V/V (MAX4073H) ♦ ±1.0% Full-Scale Accuracy ♦ 500µA Supply Current ♦ Wide 1.8MHz Bandwidth ♦ +3V to +28V Operating Supply ♦ Wide +2V to +28V Common-Mode Range Independent of Supply Voltage ♦ Automotive Temperature Range (-40°C to +125°C) ♦ Available in Space-Saving 5-Pin SC70 Package MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier Typical Operating Circuit 19-2048; Rev 1; 8/12 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. Ordering Information Pin Configurations appear at end of data sheet. PART TEMP. RANGE PIN-PACKAGE GAIN (V/V) TOP MARK MAX4073TAXK+T -40°C to +125°C 5 SC70 20 ACM MAX4073TAUT+T -40°C to +125°C 6 SOT23 20 AAUE MAX4073FAXK+T -40°C to +125°C 5 SC70 50 ACN MAX4073FAUT+T -40°C to +125°C 6 SOT23 50 AAUF MAX4073HAXK+T -40°C to +125°C 5 SC70 100 ACO MAX4073HAUT+T -40°C to +125°C 6 SOT23 100 AAUG +Denotes lead(Pb)-free/RoHS-compliant package. MAX4073T/F/H RSENSE ILOAD +2V TO +28V VSENSE VCC OUT VIN GND RS++3V TO +28V 0.1µF RS- LOAD/ BATTERY LOW-COST SWITCHING REGULATOR

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 2 Maxim Integrated ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VRS+ = +2V to +28V, VSENSE = (VRS+ - VRS-) = 0, VCC = +3V to +28V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) 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. VCC to GND............................................................-0.3V to +30V RS+, RS- to GND....................................................-0.3V to +30V OUT to GND ...............................................-0.3V to (VCC + 0.3V) Output Short-Circuit to GND ......................................Continuous Differential Input Voltage (VRS+ - VRS-) .................................±5V Current Into Any Pin..........................................................±20mA Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 2.27mW/°C above +70°C)............200mW 6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature ....................................................+260°C PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range VCC (Note 2) 3 28 V Common-Mode Input Range VCMR (Note 3) 2 28 V Common-Mode Rejection CMR VSENSE = 100mV, VCC = 12V 90 dB Supply Current ICC VCC = 28V 0.5 1.2 mA Leakage Current IRS+/IRS- VCC = 0V, VRS+ = 28V 0.05 1 µA IRS+ 20 60 Input Bias Current IRS- 40 120 µA Full-Scale Sense Voltage VSENSE VSENSE = (VRS+ - VRS-) 150 mV VSENSE = 100mV, VCC = 12V, VRS+ = 2V ±1.0 VSENSE = 100mV, VCC = 12V, VRS+ = 12V, TA = +25 oC ±1.0 ±5.0 VSENSE = 100mV, VCC = 12V, VRS+ = 12V, TA = TMIN to TMAX ±7.0 VSENSE = 100mV, VCC = 28V, VRS+ = 28V, TA = +25 oC ±1.0 ±5.0 VSENSE = 100mV, VCC = 28V, VRS+ = 28V, TA = TMIN to TMAX ±8.5 Total OUT Voltage Error (Note 4) VSENSE = 6.25mV (Note 5); VCC = 12V, VRS+ = 12V ±7.5 % Extrapolated Input Offset Voltage VOS VCC = VRS+ = 12V, VSENSE > 10mV 1.0 mV MAX4073T, VCC = 3V MAX4073F, VCC = 7.5VOUT High Voltage (VCC - VOH) VSENSE = 150mV MAX4073H, VCC = 15V 0.8 1.2 V

Page 4

MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 3Maxim Integrated ELECTRICAL CHARACTERISTICS (continued) (VRS+ = +2V to +28V, VSENSE = (VRS+ - VRS-) = 0, VCC = +3V to +28V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX4073T, VSENSE = 100mV 1.8 MAX4073F, VSENSE = 100mV 1.7 MAX4073H, VSENSE = 100mV 1.6 MHz Bandwidth BW VCC = 12V, VRS+ = 12V, CLOAD = 5pF MAX4073T/F/H VSENSE = 6.25mV (Note 5) 600 kHz MAX4073T 20 MAX4073F 50Gain AV MAX4073H 100 V/V TA = +25°C ±1.0 ±4.5 VCC = 12V, VRS+ = 12V, VSENSE = 10mV to 150mV, MAX4073T/F TA = TMIN to TMAX ±6.5 TA = +25°C ±1.0 ±4.5 Gain Accuracy ∆AV VCC = 12V, VRS+ = 12V, VSENSE = 10mV to 100mV, MAX4073H TA = TMIN to TMAX ±6.5 % VSENSE = 6.25mV to 100mV 400 OUT Settling Time to 1% of Final Value VCC = 12V VRS+ = 12V CLOAD = 5pF VSENSE = 100mV to 6.25mV 800 ns Output Resistance ROUT 12 kΩ VSENSE = 60mV, MAX4073T 70 78 VSENSE = 24mV, MAX4073F 70 85Power-Supply Rejection Ratio PSRR V C C = 3V to 28V VSENSE = 12mV, MAX4073H 70 90 dB Power-Up Time (Note 6) CLOAD = 5pF, VSENSE = 100mV 5 µs Saturation Recovery Time (Note 7) VCC = 12V, VRS+ = 12V, CLOAD = 5pF 5 µs Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 2: Inferred from PSRR test. Note 3: Inferred from OUT Voltage Error test. Note 4: Total OUT Voltage Error is the sum of the gain and offset errors. Note 5: 6.25mV = 1/16 of 100mV full-scale sense voltage. Note 6: Output settles to within 1% of final value. Note 7: The device will not experience phase reversal when overdriven.

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 4 Maxim Integrated 0.43 0.46 0.45 0.44 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0 105 15 20 25 30 SUPPLY CURRENT vs. SUPPLY VOLTAGE M A X 4 0 7 3 t o c0 1 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (m A ) VSENSE = 6.25mV MAX4073H MAX4073F MAX4073T 0.5 0.8 0.7 0.6 0.9 1.0 1.1 1.2 1.3 1.4 1.5 0 105 15 20 25 30 SUPPLY CURRENT vs. SUPPLY VOLTAGE M A X 4 0 7 3 t o c0 2 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (m A ) VSENSE = 100mV MAX4073H MAX4073F MAX4073T 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 -50 0 25-25 50 75 100 125 SUPPLY CURRENT vs. TEMPERATURE M A X 4 0 7 3 t o c0 3 TEMPERATURE (˚C) S U P P LY C U R R EN T (m A ) VSENSE = 0 VCC = +28V 0.47 0.49 0.48 0.51 0.50 0.53 0.52 0.54 0 10 155 20 25 30 SUPPLY CURRENT vs. VRS+ VOLTAGE M A X 4 0 7 3 t o c0 4 VRS+ (V) S U P P LY C U R R EN T (m A ) VSENSE = 6.25mV MAX4073H MAX4073F MAX4073T -1.0 -0.4 -0.6 -0.8 -0.2 0 0.2 0.4 0.6 0.8 1.0 0 105 15 20 25 30 TOTAL OUTPUT ERROR vs. SUPPLY VOLTAGE M A X 4 0 7 3 t o c0 7 SUPPLY VOLTAGE (V) TO TA L O U TP U T ER R O R ( % ) VSENSE = 100mV MAX4073F MAX4073H MAX4073T 0.60 0.90 0.80 0.70 1.00 1.10 1.20 1.30 1.40 1.50 1.60 0 105 15 20 25 30 SUPPLY CURRENT vs. VRS+ VOLTAGE M A X 4 0 7 3 t o c0 5 VRS+ (V) S U P P LY C U R R EN T (m A ) VSENSE = 100mV MAX4073H MAX4073F MAX4073T 0 0.3 0.2 0.1 0.5 0.4 0.9 0.8 0.7 0.6 1.0 -50 -25 0 25 50 75 100 125 OUTPUT HIGH VOLTAGE (VCC - VOH) vs. TEMPERATURE M A X 4 0 7 3 t o c0 6 TEMPERATURE (°C) V C C - V O H ( V ) VSENSE = 150mV -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 0 105 15 20 25 30 TOTAL OUTPUT ERROR vs. SUPPLY VOLTAGE M A X 4 0 7 3 t o c0 8 SUPPLY VOLTAGE (V) TO TA L O U TP U T ER R O R ( % ) VSENSE = 6.25mV Typical Operating Characteristics (VCC = +12V, VRS+ = +12V, VSENSE = 100mV, CL = 5pF, TA = +25°C, unless otherwise noted.) -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 0 105 15 20 25 30 TOTAL OUTPUT ERROR vs. COMMON-MODE VOLTAGE M A X 4 0 7 3 t o c0 9 COMMON-MODE VOLTAGE (V) TO TA L O U TP U T ER R O R ( % )

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 5Maxim Integrated -1.0 -0.6 -0.8 -0.2 -0.4 0.2 0 0.4 0.8 0.6 1.0 -50 0 25-25 50 75 100 125 150 TOTAL OUTPUT ERROR vs. TEMPERATURE M A X 4 0 7 3 t o c1 0 TEMPERATURE (°C) TO TA L O U TP U T ER R O R ( % ) VCC = +12V VCC = +28V GAIN ACCURACY vs. TEMPERATURE M A X 4 0 7 3 t o c1 1 -2.0 -1.5 -0.5 -1.0 1.0 1.5 0.5 0 2.0 G A IN A C C U R A C Y ( % ) -50 0 25-25 50 75 100 125 TEMPERATURE (°C) VSENSE = (10mV - 100mV) 100 1000 5 10 15 20 25 35 30 40 45 0.1 1 10 SMALL-SIGNAL GAIN vs. FREQUENCY M A X 4 0 7 3 t o c1 2 FREQUENCY (kHz) G A IN ( dB ) 0 10,000 MAX4073H MAX4073F MAX4073T Typical Operating Characteristics (continued) (VCC = +12V, VRS+ = +12V, VSENSE = 100mV, CL = 5pF, TA = +25°C, unless otherwise noted.) 100 20 0.1 10 100 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 40 30 50 60 70 80 90 M A X 4 0 7 3 t o c1 3 FREQUENCY (kHz) P S R R ( dB ) 1 1000 MAX4073H MAX4073F MAX4073T 1µs/div MAX4073T SMALL-SIGNAL TRANSIENT RESPONSE VSENSE 2.5mV/div OUT 50mV/div 95mV 100mV 2V 1.9V MAX4073 toc14 1µs/div MAX4073F SMALL-SIGNAL TRANSIENT RESPONSE VSENSE 2.5mV/div OUT 125mV/div 95mV 100mV 5V 4.75V MAX4073 toc15 1µs/div MAX4073H SMALL-SIGNAL TRANSIENT RESPONSE VSENSE 2.5mV/div 95mV 100mV 10V 9.5V MAX4073 toc16 OUT 250mV/div

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 6 Maxim Integrated Typical Operating Characteristics (continued) (VCC = +12V, VRS+ = +12V, VSENSE = 100mV, CL = 5pF, TA = +25°C, unless otherwise noted.) 1µs/div MAX4073T LARGE-SIGNAL TRANSIENT RESPONSE VSENSE 45mV/div OUT 0.9V/div 6.25mV 100mV 2V 0.120V MAX4073 toc17 1µs/div MAX4073F LARGE-SIGNAL TRANSIENT RESPONSE VSENSE 45mV/div OUT 2.35V/div 6.25mV 100mV 5V 0.3V MAX4073 toc18 1µs/div MAX4073H LARGE-SIGNAL TRANSIENT RESPONSE VSENSE 45mV/div OUT 4.7V/div 6.25mV 100mV 10V 0.6V MAX4073 toc19 1µs/div MAX4073T OVERDRIVE RESPONSE VSENSE 100mV/div OUT 600mV/div 50mV 250mV VOH 1V MAX4073 toc20 VCC = +3V 1µs/div MAX4073T STARTUP DELAY VCC 2V/div OUT 1V/div 0 4V 2V 0 MAX4073 toc21 VCC = 0 to +4V

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Detailed Description The MAX4073 high-side current-sense amplifier fea- tures a +2V to +28V input common-mode range that is independent of supply voltage. This feature allows the monitoring of current out of a battery as low as +2V and also enables high-side current sensing at voltages greater than the supply voltage (VCC). The MAX4073 operates as follows: current from the source flows through RSENSE to the load (Figure 1). Since the internal-sense amplifier’s inverting input has high impedance, negligible current flows through RG2 (neglecting the input bias current). Therefore, the sense amplifier’s inverting-input voltage equals VSOURCE - (ILOAD)(RSENSE). The amplifier’s open-loop gain forces its noninverting input to the same voltage as the inverting input. Therefore, the drop across RG1 equals (ILOAD)(RSENSE). Since IRG1 flows through RG1, IRG1 = (ILOAD)(RSENSE) / RG1. The internal current mirror multiplies IRG1 by a current gain factor, β, to give IRGD = β ✕ IRG1. Solving IRGD = β ✕ (ILOAD)(RSENSE)/ RG1. Assuming infinite output impedance, VOUT = (IRGD) (RGD). Substituting in for IRGD and rearranging, VOUT = β ✕ (RGD/RG1)(RSENSE ✕ ILOAD). The parts gain equals β ✕ RGD/RG1. Therefore, VOUT = (GAIN) (RSENSE) (ILOAD), where GAIN = 20V/V for MAX4073T, GAIN = 50V/V for MAX4073F, and GAIN = 100V/V for MAX4073H. Set the full-scale output range by selecting RSENSE and the appropriate gain version of the MAX4073. Applications Information Recommended Component Values The MAX4073 senses a wide variety of currents with different sense resistor values. Table 1 lists common resistor values for typical operation of the MAX4073. Choosing RSENSE To measure lower currents more accurately, use a large value for RSENSE. The larger value develops a higher-sense voltage that reduces offset voltage errors of the internal op amp. Typical sense voltages range between 10mV and 150mV. In applications monitoring very high currents, RSENSE must be able to dissipate the I2R losses. If the resistor’s rated power dissipation is exceeded, its value may drift or it may fail altogether, causing a differential voltage across the terminals in excess of the absolute maxi- mum ratings (±5V). If ISENSE has a large high-frequency component, mini- mize the inductance of RSENSE. Wire-wound resistors have the highest inductance, metal-film resistors are MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 7Maxim Integrated Pin Description PIN SOT23 SC70 NAME FUNCTION 1, 2 2 GND Ground 3 3 VCC Supply Voltage Input. Bypass to GND with a 0.1µF capacitor. 4 4 RS+ Power-Side Connection to the External Sense Resistor 5 5 RS- Load-Side Connection to the External Sense Resistor 6 1 OUT Voltage Output. VOUT is proportional to VSENSE. Output impedance is approximately 12kΩ. RSENSE VSOURCE +2V TO +28V +3V TO +28V RGD = 12kΩ VOUT IRG1 IRGD ILOAD RG1 RG2 RS-RS+ OUT GND TO LOAD/BATTERY VCC CURRENT MIRROR A1 MAX4073T/F/H Figure 1. Functional Diagram

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 8 Maxim Integrated somewhat better, and low-inductance metal-film resis- tors are best suited for these applications. For VSENSE = 100mV, full-scale output voltage can be 2V, 5V, or 10V depending on the gain. For proper oper- ation, ensure VCC exceeds the full-scale output voltage by 1.2V (see Output High Voltage (VCC - VOH) vs. Temperature in the Typical Operating Characteristics). Using a PCB Trace as RSENSE If the cost of RSENSE is an issue and accuracy is not critical, use the alternative solution shown in Figure 2. This solution uses copper PC board traces to create a sense resistor. The resistivity of a 0.1-inch-wide trace of 2-ounce copper is approximately 30mΩ/ft. The resis- tance-temperature coefficient of copper is fairly high (approximately 0.4%/°C), so systems that experience a wide temperature variance must compensate for this effect. In addition, do not exceed the maximum power dissipation of the copper trace. For example, the MAX4073T (with a maximum load cur- rent of 10A and an RSENSE of 5mΩ) creates a full-scale VSENSE of 50mV that yields a maximum VOUT of 1V. RSENSE in this case requires about 2 inches of 0.1 inch- wide copper trace. Output Impedance The output of the MAX4073 is a current source driving a 12kΩ resistance. Resistive loading added to OUT reduces the output gain of the MAX4073. To minimize output errors for most applications, connect OUT to a high-impedance input stage. When output buffering is required, choose an op amp with a common-mode input range and an output voltage swing that includes ground when operating with a single supply. The op amp’s supply voltage range should be at least as high as any voltage the system may encounter. The percent error introduced by output loading is deter- mined with the following formula: where RLOAD is the external load applied to OUT. Current Source Circuit Figure 3 shows a block diagram using the MAX4073 with a switching regulator to make a current source. % 100 R 12k R 1ERROR LOAD LOAD = Ω + − ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ MAX4073T VSENSE RSENSE +3V TO +28V 0.1µF RS+ + 0.3in COPPER INPUT LOAD/BATTERY 0.3in COPPER0.1in COPPER RS- GND OUT VCC _ Figure 2. MAX4073T Connections Showing Use of PC Board Figure 3. Current Source MAX4073T/F/H RSENSE ILOAD +2V TO +28V VSENSE VCC OUT VIN GND RS++3V TO +28V 0.1µF RS- LOAD/ BATTERY LOW-COST SWITCHING REGULATOR

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MAX4073T/F/H Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier 9Maxim Integrated Table 1. Recommended Component Values 10.0100 5.050 2.0 10 10 20 10.0100 5.050 2.0 5 20 20 10.0100 5.050 2.0 1 100 20 10.0100 5.0501000 CURRENT-SENSE RESISTOR RSENSE (mΩ) 20 GAIN 2.0 0.1 FULL-SCALE OUTPUT VOLTAGE (FULL-SCALE VSENSE = 100mV) VOUT (V) FULL-SCALE LOAD CURRENT ILOAD (A) 5 RS-GND GND RS+VCC 1 6 OUT MAX4073T/F/H 2 3 4 SOT23 GND VCC 1 5 RS-OUT MAX4073T/F/H SC70 + + 2 3 4 TOP VIEW RS+ Pin Configurations Chip Information PROCESS: Bipolar

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February 17, 2020

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December 23, 2019

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hotMAX4073HAUT+T MAX4040ESA Maxim Integrated, IC OPAMP GP 90KHZ RRO 8SOIC, 8-SOIC (0.154", 3.90mm Width), - View
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