SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/M

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/M

Datasheet Thumbnail

Top Searches for this datasheet

19-1407; 8/99
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
MAX4174/MAX4175/MAX4274/MAX4275 GainAmpfamily combines low-cost Rail-to-Rail® with precision internal gain-setting resistors biasing. Factory-trimmed on-chip resistors decrease design size, cost, layout, provide 0.1% gain accuracy. Fixed inverting gains from -0.25V/V -100V/V noninverting gains from +1.25V/V +101V/V available. These devices operate from single +2.5V +5.5V supply consume only 300µA. GainAmp amplifiers optimally compensated each gain version, achieving exceptional products 23MHz +25V/V +101V/V). High-voltage fault protection withstands ±17V either input without excessive current draw. Three versions available this amplifier family: single/ dual/quad open-loop, unity-gain stable (MAX4281/ MAX4282/MAX4284); single/dual fixed gain (MAX4174/ MAX4274); single/dual fixed gain plus internal bias noninverting input (MAX4175/ MAX4275), which simplifies input biasing single-supply designs. input common-mode voltage range open-loop amplifiers extends from 150mV below negative supply within 1.2V positive supply. outputs swing rail-to-rail drive load while maintaining excellent accuracy. amplifier stable capacitive loads 470pF.
Features
GainAmp Family Provides Internal Precision Gain-Setting Resistors SOT23 (MAX4174/5) 0.1% Gain Accuracy (RF/RG) (MAX4174/5, MAX4274/5) Standard Gains Available (MAX4174/5, MAX4274/5) Open-Loop Unity-Gain-Stable Amps (MAX4281/2/4) Rail-to-Rail Outputs Drive Load Internal Biasing (MAX4175/MAX4275) +2.5V +5.5V Single Supply 300µA Supply Current 23MHz Product Fault-Protected Inputs Withstand ±17V Stable with Capacitive Loads 470pF with Isolation Resistor
MAX4174/5, MAX4274/5, MAX4281/2/4
Ordering Information
PART* TEMP. RANGE PINPACKAGE SOT23-5 SOT23-5 MARK
Applications
Portable Instruments Instruments, Terminals, Bar-Code Readers Keyless Entry Photodiode Preamps Smart-Card Readers Infrared Receivers Remote Controls Low-Side Current-Sense Amplifiers
MAX4174_EUK-T -40°C +85°C MAX4175_EUK-T -40°C +85°C
Ordering Information continued data sheet. Insert desired gain code (from Gain Selection Guide) blank complete part number. Refer Gain Selection Guide list preferred gains Marks. Selector Guide appears data sheet.
Configurations
VIEW
Typical Operating Circuit
0.1µF
MAX4174
IN0.1µF INPUT 0.1µF INRG
MAX4175
SOT23-5
Configurations continued data sheet.
Patent pending
GainAmp trademark Maxim Integrated Products. Rail-to-Rail registered trademark Nippon Motorola, Ltd.
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC VEE) .-0.3V Voltage Inputs (IN_) MAX4281/4282/4284.(VEE 0.3V) (VCC 0.3V) MAX4174/4175/4274/4275 (with respect GND) .±17V Output Short-Circuit Duration (OUT_).Continuous Either Continuous Power Dissipation +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C).571mW 8-Pin (derate 5.88mW/°C above +70°C).471mW 8-Pin µMAX (derate 4.1mW/°C above +70°C) .330mW 14-Pin (derate 8.3mW/°C above +70°C).667mW 16-Pin QSOP (derate 8.3mW/°C above +70°C).667mW Operating Temperature Range .-40°C +85°C Maximum Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10sec) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL Fixed-Gain Amplifiers
(VCC +2.5V +5.5V, VIN+ VIN- open, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note PARAMETER Supply Voltage Range Supply Current (per Amplifier) Input Offset Voltage Input Offset Voltage Drift Input Bias Current Inverting Input Resistance Noninverting Input Resistance IN_+ Bias Voltage IN_+ Input Voltage Range IN_- Input Voltage Range Power-Supply Rejection Ratio Closed-Loop Output Impedance Short-Circuit Current PSRR ROUT Shorted Shorted 100k VOH/VOL IBIAS IN_+, MAX4174/MAX4274 (Note 25V/V 25V/V MAX4174/MAX4274 MAX4175/MAX4275 MAX4175/MAX4275, VIN+ VINGuaranteed functional test (Note Guaranteed functional test 2.5V 5.5V 0.25 0.02 SYMBOL CONDITIONS Guaranteed PSRR tests MAX4174/MAX4274 MAX4175/MAX4275, includes bias resistors 100k ±0.5 ±0.05 1000 0.25 ±2.5 µV/°C UNITS
Output Voltage Swing (Note
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
ELECTRICAL Fixed-Gain Amplifiers (continued)
(VCC +2.5V +5.5V, VIN+ VIN- open, TMIN TMAX, unless otherwise noted. Typical PARAMETER Power-Up Time Slew Rate Settling Time Within 0.01% Input Noise Voltage Density Input Noise Current Density Capacitive Load Stability Gain Accuracy CLOAD SYMBOL CONDITIONS Output settling VOUT step VOUT step 10kHz (Note 10kHz sustained oscillations (VEE 25mV) VOUT (VCC 25mV), 100k (Note Gain +1.25V/V Gain +3V/V -3dB Bandwidth BW-3dB Gain +5V/V Gain +10V/V Gain +25V/V Gain +51V/V 1700 UNITS V/µs nV/Hz fA/Hz
MAX4174/5, MAX4274/5, MAX4281/2/4
ELECTRICAL Open-Loop Amps
(VCC +2.5V +5.5V, VIN+ VIN- open, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note PARAMETER Supply Voltage Range Supply Current (per Amplifier) Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Current Input Resistance Input Capacitance Common-Mode Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Closed-Loop Output Impedance IBIAS CMVR CMRR PSRR ROUT Guaranteed CMRR test 0.15V 1.2V 2.5V 5.5V 1V/V 0.15 0.02 Differential common mode SYMBOL 100k CONDITIONS Guaranteed PSRR tests ±0.5 ±0.05 1000 ±1000 UNITS µV/°C
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
ELECTRICAL Open-Loop Amps (continued)
(VCC +2.5V +5.5V, VIN+ VIN- open, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note PARAMETER Short-Circuit Current Large-Signal Voltage Gain AVOL SYMBOL CONDITIONS Shorted Shorted 0.05V VOUT 0.1V, 100k 0.25V VOUT 0.3V, 100k Output Voltage Swing VOH/VOL Gain Bandwidth Product Slew Rate Settling Time within 0.01% Input Noise Voltage Density Input Noise Current Density Capacitive Load Stability Power-Up Time CLOAD VOUT step VOUT step 10kHz 10kHz sustained oscillations, 1V/V Output settling V/µs nV/Hz fA/Hz UNITS
Note MAX4174/MAX4175/MAX4281 MAX4274/MAX4275/MAX4282 MAX4284 100% production tested +25°C. temperature limits guaranteed design. Note Guaranteed design. Note input common-mode range IN_+ guaranteed functional test. similar test done IN_- input. Applications Information section more information input voltage range GainAmp. Note -0.5V/V -0.25V/V, output voltage swing limited input voltage range. Note Includes noise from on-chip resistors. Note gain accuracy test performed with GainAmp noninverting configuration. output voltage swing limited input voltage range certain gains supply voltage conditions. situations where output voltage swing limited valid input range, output limits adjusted accordingly.
Typical Operating Characteristics
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
LARGE-SIGNAL GAIN FREQUENCY
MAX4174 TOC01
LARGE-SIGNAL GAIN FREQUENCY
MAX4174 TOC02
LARGE-SIGNAL GAIN FREQUENCY
NORMALIZED GAIN (dB) +9V/V +5V/V
MAX4174 TOC03
NORMALIZED GAIN (dB) 100k FREQUENCY (Hz) +2.25V/V +1.25V/V
NORMALIZED GAIN (dB) +4V/V +2.5V/V
100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Typical Operating Characteristics (continued)
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
MAX4174/MAX4175
LARGE-SIGNAL GAIN FREQUENCY
MAX4174 TOC04
LARGE-SIGNAL GAIN FREQUENCY
MAX4174 TOC05
LARGE-SIGNAL GAIN FREQUENCY
NORMALIZED GAIN (dB) +100V/V +51V/V
MAX4174 TOC06
NORMALIZED GAIN (dB) 100k FREQUENCY (Hz) +21V/V +10V/V
NORMALIZED GAIN (dB) +50V/V +25V/V
100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
SMALL-SIGNAL GAIN FREQUENCY
MAX4174 TOC07
SMALL-SIGNAL GAIN FREQUENCY
MAX4174 TOC08
SMALL-SIGNAL GAIN FREQUENCY
NORMALIZED GAIN (dB) +9V/V +5V/V
MAX4174 TOC09
NORMALIZED GAIN (dB) 100k FREQUENCY (Hz) +2.25V/V +1.25V/V
NORMALIZED GAIN (dB) +4V/V +2.5V/V
100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
SMALL-SIGNAL GAIN FREQUENCY
MAX4174 TOC10
SMALL-SIGNAL GAIN FREQUENCY
MAX4174 TOC11
SMALL-SIGNAL GAIN FREQUENCY
NORMALIZED GAIN (dB) +100V/V +51V/V
MAX4174 TOC12
NORMALIZED GAIN (dB) 100k FREQUENCY (Hz) +21V/V +10V/V
NORMALIZED GAIN (dB) +50V/V +25V/V
100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Typical Operating Characteristics (continued)
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
MAX4174/MAX4175
TOTAL HARMONIC DISTORTION FREQUENCY
MAX4174 TOC13
TOTAL HARMONIC DISTORTION FREQUENCY
VOUT 1Vp-p (dB) -100 +25V/V
MAX4174 TOC14
VOUT 1Vp-p (dB) -100 +3V/V -120 100k
+10V/V +1.25V/V
+51V/V
-120 100k FREQUENCY (Hz)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION OUTPUT VOLTAGE SWING
MAX4174 TOC15
TOTAL HARMONIC DISTORTION OUTPUT VOLTAGE SWING
10kHz
MAX4174 TOC16
10kHz (dB) +1.25V/V -100 +3V/V -110 -120 +10V/V
+51V/V (dB) +25V/V -100 -110 -120 VOLTAGE SWING (Vp-p) VOLTAGE SWING (Vp-p)
VOLTAGE NOISE DENSITY FREQUENCY +1.25, +10)
MAX4174/5
VOLTAGE NOISE DENSITY FREQUENCY +25, +51)
MAX4174/5
CURRENT NOISE DENSITY FREQUENCY
MAX4174/5 toc19
1000 VOLTAGE NOISE DENSITY (nV/Hz)
1000 VOLTAGE NOISE DENSITY (nV/Hz)
CURRENT NOISE DENSITY (fA/Hz)
+10V/V
+3V/V
+25V/V
+1.25V/V
+51V/V
INCLUDES RESISTOR NOISE 100k FREQUENCY (Hz) 100k FREQUENCY (Hz) 100k
FREQUENCY (Hz)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
Typical Operating Characteristics (continued)
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
MAX4174/5, MAX4274/5, MAX4281/2/4
MAX4174/MAX4175
LARGE-SIGNAL PULSE RESPONSE
MAX4174/5
SMALL-SIGNAL PULSE RESPONSE
MAX4174/5
INPUT VOLTAGE
INPUT VOLTAGE
+1.25V/V OUTPUT 500mV/div
+1.25V/V OUTPUT 50mV/div
+3V/V OUTPUT 50mV/div
+3V/V OUTPUT 50mV/div
+5V/V OUTPUT 500mV/div
+5V/V OUTPUT 50mV/div
+10V/V OUTPUT 500mV/div
+10V/V OUTPUT 50mV/div
+25V/V OUTPUT 500mV/div
+25V/V OUTPUT 50mV/div
+51V/V OUTPUT 500mV/div
+51V/V OUTPUT 50mV/div
2µs/div
2µs/div
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Typical Operating Characteristics (continued)
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION FREQUENCY
MAX4174 TOC22
OUTPUT IMPEDANCE FREQUENCY
MAX4174 TOC23
OUTPUT VOLTAGE SWING RLOAD
VSWING (Vp-p)
MAX4174 TOC24
OUTPUT IMPEDANCE
(dB)
0.01 FREQUENCY (Hz) 100k FREQUENCY (Hz) 100k
RLOAD
INPUT OFFSET VOLTAGE TEMPERATURE
MAX4174/5
INPUT BIAS CURRENT TEMPERATURE
MAX4174/5
INPUT OFFSET VOLTAGE (µV) -100 -150 -200 2.5V 5.5V
1000 INPUT BIAS CURRENT (pA) 5.5V -200 2.5V
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY CURRENT TEMPERATURE
MAX4174/5
TEMPERATURE (VCC 2.5V)
MAX4174/5
TEMPERATURE (VCC 5.5V)
-100
MAX4174/5
SUPPLY CURRENT (µA) 2.5V 5.5V
VOLTAGE (mV) -100 VOL, 100k VOL, VOL, VOH, VOH, VOH, 100k
VOH,
VOLTAGE (mV)
VOH, 100k VOH, VOL, 100k
VOL, 100k VOL,
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Typical Operating Characteristics
(VCC +5V, 100k small-signal VOUT 100mVp-p, large-signal VOUT 1Vp-p, +25°C, unless otherwise noted.)
MAX4281/MAX4282/MAX4284
OPEN-LOOP GAIN PHASE FREQUENCY
MAX4174/5 toc30
SMALL-SIGNAL GAIN FREQUENCY
MAX4174/5 toc31
LARGE-SIGNAL GAIN FREQUENCY
GAIN (dB)
MAX4174/5 toc32
PHASE (degrees) GAIN (dB) 100k FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
100k
-135 -180 -225 -270 -315
100k FREQUENCY (Hz)
FREQUENCY (Hz)
COMMON-MODE REJECTION FREQUENCY
MAX4174/5 toc33
VOLTAGE NOISE DENSITY FREQUENCY
MAX4174/5 toc34
CURRENT NOISE DENSITY FREQUENCY
MAX4174/5 toc35
(dB) -100 100k
1000 VOLTAGE NOISE DENSITY (nV/Hz)
CURRENT NOISE DENSITY (fA/Hz)
100k FREQUENCY (Hz) FREQUENCY (Hz)
100k
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION FREQUENCY
VOUT 1Vp-p (dB) -100 -110 -120 100k FREQUENCY (Hz)
MAX4174/5 toc36
MAX4282 CROSSTALK FREQUENCY
MAX4174/5 toc37
MAX4284 CROSSTALK FREQUENCY
THREE AMPLIFIERS DRIVEN, OUTPUT MEASURED
MAX4174/5 toc38
CROSSTALK (dB) 100k FREQUENCY (Hz)
CROSSTALK (dB)
100k FREQUENCY (Hz)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Description
MAX4281 SOT23 MAX4174/ MAX4175 SOT23 MAX4282 SO/µMAX MAX4274/ MAX4275 SO/µMAX MAX4284 SO/TSSOP QSOP NAME NAME OUT, OUTA, OUTB, OUTC, OUTD FUNCTION FUNCTION
Amplifier Output
Negative Supply Ground Noninverting Amplifier Input. Internally biased MAX4175/MAX4275 Inverting Amplifier Input. Connects MAX4174/ 4175/4274/4275. Positive Supply Connection. internally connected.
IN+, INA+, INB+, INC+, IND+
IN-, INA-, INB-, INC-, INDVCC N.C.
Functional Diagrams
ININVEE
MAX4281
MAX4174
150k
MAX4175
150k
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
Detailed Description
Maxim's GainAmp fixed-gain amplifiers combine lowcost rail-to-rail with internal gain-setting resistors. Factory-trimmed on-chip resistors provide 0.1% gain accuracy while decreasing design size, cost, layout. Three versions available this amplifier family: single/dual/quad open-loop, unity-gain-stable devices (MAX4281/MAX4282/MAX4284); single/dual fixed-gain devices (MAX4174/MAX4274); single/ dual devices with fixed gain plus internal bias noninverting input (MAX4175/MAX4275). amplifiers feature rail-to-rail outputs drive load while maintaining excellent accuracy. increases usable bandwidth, while decompensation above gains +25V/V offers diminished returns.
MAX4174/5, MAX4274/5, MAX4281/2/4
Open-Loop Amps
single/dual/quad MAX4281/MAX4282/MAX4284 high-performance, open-loop amps with rail-torail outputs. These devices compensated unitygain stability, feature gain bandwidth (GBW) 2MHz. amps these feature input common-mode range that extends from 150mV below negative rail within 1.2V positive rail. These high performance amps serve core this family GainAmp fixed-gain amplifiers. Although -3dB bandwidth will correspond that fixedgain amplifier higher gain configurations, these open-loop op-amps used prototype designs.
Internal Bias MAX4175/MAX4275 GainAmp fixed-gain amplifiers with bias option identical standard GainAmp fixed-gain amplifiers, with added feature internal bias noninverting inputs. 150k resistors form voltage-divider self-biasing noninverting input, eliminating external bias resistors AC-coupled applications, allowing maximum signal swing amp's rail-to-rail output single-supply systems (see Typical Operating Circuit). DC-coupled applications, MAX4174/ MAX4274. High-Voltage (±17V) Input Fault Protection
MAX4174/MAX4175/MAX4274/MAX4275 include ±17V input fault protection. normal operation, input voltage range specification Electrical Characteristics. Overdriven inputs ±17V will
Internal Gain-Setting Resistors
Maxim's proprietary laser trimming techniques produce necessary RF/RG values (Figure many gain offerings easily available. These GainAmp fixed-gain amplifiers feature negative-feedback resistor network that laser trimmed provide gain-setting feedback ratio (RF/RG) with 0.1% typical accuracy. standard pinouts allow GainAmp fixed-gain amplifiers drop directly existing board designs, easily replacing op-amp-plus-resistor gain blocks.
Figure Internal Gain-Setting Resistors
-3dB 100k FREQUENCY (Hz) 20kHz 230kHz MAX4281, 2MHz MAX4174, 23MHz
GainAmp Bandwidth
GainAmp fixed-gain amplifiers feature factory-trimmed precision resistors provide fixed inverting gains from -0.25V/V -100V/V noninverting gains from +1.25V/V +101V/V. op-amp core decompensated strategically over gain-set options maximize bandwidth. Open-loop decompensation increases product, ensuring that usable bandwidth maintained with increasing closed-loop gains. GainAmp with fixed gain 100V/V -3dB bandwidth 230kHz. comparison, unity-gain-stable configured 100V/V would yield -3dB bandwidth only 20kHz (Figure Decompensation performed five intermediate gain sets, shown Gain Selection Guide. gain decompensation great-
Figure Gain-Bandwidth Comparison
GAIN (dB)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
cause output phase reversal. back-to-back structure input pins allows either input safely swing ±17V relative (Figure Additionally, internal op-amp inputs diode clamped either supply rail protection sensitive input stage circuitry. Current through clamp diodes limited resistor noninverting input, inverting input. fault voltage high ±17V will cause less than 3.5mA current flow through input pin, protecting both GainAmp signal source from damage.
GainAmp Input Voltage Range
MAX4174/MAX4175/MAX4274/MAX4275 combine both gain-setting feedback resistors same chip. Because inverting input actually tied input series resistor, inverting input voltage range different from noninverting input voltage range. Just with discrete design, care must taken saturate inputs/output core amp, avoid signal distortions clipping. inverting inputs (IN_-) MAX4174/MAX4175/ MAX4274/MAX4275 must within supply rails signal distortion result. GainAmp's inverting input structure includes diodes both supplies, such that driving inverting input beyond rails cause signal distortions (Figure applications that require sensing voltages beyond rails, MAX4281/MAX4282/MAX4284 open-loop amps (Figure
Applications Information
GainAmp fixed-gain amplifiers offer precision, fixed gain amplifier small package that used variety circuit board designs. GainAmp fixed-gain amplifiers used many circuits that resistive negative feedback gain, that require other connections op-amp inverting input. Both inverting noninverting op-amp configurations implemented easily using GainAmp.
IN17V
MAX4174 MAX4175 MAX4274 MAX4275
NOTE: INPUT STAGE PROTECTION INCLUDES SCRs DIODES INPUT STAGE.
BIAS RESISTORS (MAX4175/MAX4275 ONLY)
Figure Input Protection
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
MAX4281
MAX4175
VOUT (VIN)
0.1µF
VOUT
Figure Single-Supply, DC-Coupled Inverting Amplifier with Negative Input Voltage
Figure Single-Supply, AC-Coupled Inverting Amplifier
MAX4174
VOUT
MAX4174
VOUT
RRFG
Figure Dual-Supply, DC-Coupled Inverting Amplifier
Figure Dual-Supply, AC-Coupled Noninverting Amplifier
GainAmp Signal Coupling Configurations
Common op-amp configurations include both noninverting inverting amplifiers. Figures show various single dual-supply circuit configurations. Single-supply systems benefit from midsupply bias noninverting input (provided internally MAX4175/MAX4275), this produces quiescent level center rail-to-rail output stage signal swing. dual-supply systems, ground-referenced signals DC-coupled into inverting noninverting inputs.
IN_+ Filter MAX4175/MAX4275
Internal resistor biasing bias options couples power-supply noise directly amp's noninverting input. minimize high-frequency power-supply noise coupling, 0.1µF capacitor from ground create lowpass filter (Figure lowpass filter resulting from internal bias resistors added capacitor help eliminate higher frequency power-supply noise coupling through noninverting input.
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Supply Bypassing Board Layout
devices GainAmp family operate from +2.5V +5.5V single supply from ±1.25V ±2.75V dual supplies. single-supply operation, bypass power supply with 0.1µF capacitor ground. dual supplies, bypass each supply ground. Bypass with capacitors close device possible, minimize lead inductance noise. printed circuit board with low-inductance ground plane recommended. gain amplifiers this GainAmp family stable with capacitive loads 470pF. Stability with higher capacitive loads improved adding isolation resistor series with op-amp output, shown Figure This resistor improves circuit's phase margin isolating load capacitor from amplifier's output. Figure 1000pF capacitor driven with isolation resistor exhibiting some overshoot oscillation. Figures show typical small-signal pulse responses GainAmp fixed-gain amplifiers with 250pF 470pF capacitive loads isolation resistor.
Capacitive-Load Stability
Driving large capacitive loads cause instability most low-power, rail-to-rail output amplifiers. fixed-
MAX4174
VOUT INPUT
+5V/V 50mV/div OUTPUT
+5V/V 500mV/div
OUTPUT
Figure Dual-Supply, DC-Coupled Noninverting Amplifier
Figure Small-Signal/Large-Signal Transient Response with Excessive Capacitive Load with Isolation Resistor
MAX4174
RISO INPUT OUTPUT
Figure Dual-Supply, Capacitive-Load Driving Circuit
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
INPUT
INPUT
+1.25V/V OUTPUT 50mV/div
+1.25V/V OUTPUT 50mV/div
+3V/V OUTPUT 50mV/div
+3V/V OUTPUT 50mV/div
+5V/V OUTPUT 50mV/div
+5V/V OUTPUT 50mV/div
+10V/V OUTPUT 50mV/div
+10V/V OUTPUT 50mV/div
+25V/V OUTPUT 50mV/div
+25V/V OUTPUT 50mV/div
+51V/V OUTPUT 50mV/div
+51V/V OUTPUT 50mV/div
2µs/div
2µs/div
Figure MAX4174/MAX4175 Small-Signal Pulse Response 250pF, 100k)
Figure MAX4174/MAX4175 Small-Signal Pulse Response 470pF, 100k)
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Gain Selection Guide
GAIN CODE RF/RG INVERTING GAIN 0.25 1.25 12.5 (RF/RG) NONINVERTING GAIN 1.25 2.25 13.5 -3dB (kHz) 1700 1280 1180 MARK MAX4174 ACDS ACDT ACDU ACDV ACDW ACDX ACDY ACDZ ACEA ACEB ACEC ACED ACEE ACEF ACEG ACEH ACEI ACEJ ACEK ACEL ACEM ACEN ACEO ACEP ACEQ ACER ACES MAX4175 ACET ACEU ACEV ACEW ACEX ACEY ACEZ ACFA ACFB ACFC ACFD ACFE ACFF ACFG ACFH ACFI ACFJ ACFK ACFL ACFM ACFN ACFO ACFP ACFQ ACFR ACFS ACFT
Note: Gains noninverting configuration (RF/RG) range from +1.25V/V +101V/V. +1V/V gain, MAX4281/MAX4282/MAX4284. Preferred Gains. These gain versions available samples small quantities. -3dB bandwidth same inverting noninverting configurations.
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
Configurations (continued)
VIEW
MAX4174/5, MAX4274/5, MAX4281/2/4
MAX4175
MAX4281
SOT23-5
SOT23-5
MAX4281
N.C. N.C. OUTA
MAX4282
OUTA
MAX4274
INA- OUTB INA-
OUTB
INA+ INBINA+
INB-
N.C.
INB+
INB+
µMAX/SO
µMAX/SO
MAX4275
OUTA INA- INA+ INB+ OUTA INA- OUTB INA+ INBVCC INB+ INB- OUTB
MAX4284
OUTD OUTA INA- INA+ INB+ INB- OUTB N.C.
MAX4284
OUTD
IND12 IND+ INC+ INCOUTC
IND14 IND+ INC+ INC10 OUTC N.C.
SO/TSSOP
QSOP
µMAX/SO
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Ordering Information (continued)
PART* MAX4274_EUA MAX4274_ESA MAX4275_EUA MAX4275_ESA MAX4281EUK-T MAX4281ESA MAX4282EUA MAX4282ESA MAX4284EUD MAX4284ESD MAX4284EEE TEMP. RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PINPACKAGE µMAX µMAX SOT23-5 µMAX TSSOP QSOP MARK ACDR
Chip Information
TRANSISTOR COUNTS: MAX4174: MAX4175: MAX4274: MAX4275: MAX4281: MAX4282: MAX4284: SUBSTRATE CONNECTED
Note: Refer Gain Selection Guide marks. *Insert desired gain code (from Gain Selection Guide) blank complete part number. Refer Gain Selection Guide list preferred gains.
Selector Guide
PART* MAX4174_ MAX4175_ MAX4274_ MAX4275_ MAX4281_ MAX4282_ MAX4284_ INVERTING GAINS AVAILABLE (V/V) (INVERTING, RF/RG) -0.25 -100 -0.25 -100 -0.25 -100 -0.25 -100 NONINVERTING GAIN (V/V) +1.25 +101 +1.25 +101 +1.25 +101 +1.25 +101 INTERNAL RESISTORS INTERNAL VCC/2 BIAS AMPS PACKAGE PIN-PACKAGE 5-pin SOT23 5-pin SOT23 8-pin µMAX/SO 8-pin µMAX/SO 5-pin SOT23, 8-pin 8-pin µMAX/SO 14-pin SO/TSSOP, 16-pin QSOP
Open Loop, Unity-Gain Stable Open Loop, Unity-Gain Stable Open Loop, Unity-Gain Stable
Insert desired gain code (from Gain Selection Guide) blank complete part number.
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps
Package Information
SOT5L.EPS
MAX4174/5, MAX4274/5, MAX4281/2/4
SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/5, MAX4274/5, MAX4281/2/4
Package Information
8LUMAXD.EPS
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 1999 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Amps MAX4174/M

Top Searches for this datasheet

Other recent searches