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Analog Devices Inc./Maxim Integrated MAX4197ESA
- Part No.:
- MAX4197ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4197ESA.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
MAX4197ESA from Maxim Integrated is a fixed-gain, rail-to-rail, micropower instrumentation amplifier with G = +100V/V, 115dB DC common-mode rejection at 25°C, ±50µV input offset voltage (G ≥ +100V/V), and 93µA quiescent current. It operates from a single +2.7V to +7.5V supply and is used in precision sensor signal conditioning for thermocouples, bridge transducers, and 4–20mA loop transmitters.
For engineers reviewing the MAX4197ESA datasheet, MAX4197ESA pinout, MAX4197ESA application, or MAX4197ESA equivalent, this page delivers verified technical context, gain-accurate specifications, SO-8 package details, real-world use scenarios, and two validated alternative parts - all grounded in the official MAX4194–MAX4197 datasheet Rev 2 (May 2015).
Technical Context
The MAX4197ESA implements a three-op-amp topology with on-chip 25kΩ feedback resistors and internal gain-setting network for fixed +100V/V operation. Its input stage supports common-mode voltages from VEE − 0.2V to VCC − 1.1V, and its rail-to-rail output stage delivers ≤30mV swing margin into 25kΩ loads.
It features active shutdown (SHDN pin) reducing supply current to 8µA, input bias current of 6nA (typ), and 0.05% gain error at +25°C. The device is specified across −40°C to +85°C and uses thin-film resistor trimming for stable gain temperature coefficient (±15ppm/°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V, fixed via internal laser-trimmed resistors - eliminates external gain-setting components and layout sensitivity. |
| Input Offset Voltage | ±50µV (max, TA = −40°C to +85°C, G = +100V/V) - enables sub-0.1mV measurement accuracy in low-level sensor interfaces. |
| DC Common-Mode Rejection | 90dB (min, TA = −40°C to +85°C) - rejects ground noise and supply ripple in single-supply industrial sensing. |
| Supply Current | 93µA (typ, VCC = +5V) - supports >1-year battery life in portable medical or field instrumentation. |
| Shutdown Current | 8µA (typ) - allows power-gating during idle cycles without sacrificing wake-up speed (0.5ms enable time). |
| Input Voltage Range | VEE − 0.2V to VCC − 1.1V - accepts signals down to 200mV below ground, critical for unipolar sensor outputs. |
| −3dB Bandwidth | 3.1kHz (G = +100V/V) - sufficient for DC–1kHz transducer signals including thermocouple and strain gauge outputs. |
| Output Swing | Within 30mV of rails (RL = 25kΩ to VCC/2) - maximizes dynamic range in low-voltage ADC interfacing. |
Pinout & Package
MAX4197ESA is housed in an 8-pin SO (Small Outline) package per outline 21-0041, RoHS-compliant, with 1.27mm pitch and standard JEDEC SOIC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference voltage input | Sets output common-mode level; tied to VCC/2 for symmetric swing or adjusted for level-shifting ADC inputs. |
| 2 (IN−) | Inverting input | Differential input node; high-impedance (1000MΩ) for minimal loading of bridge or thermocouple sources. |
| 3 (IN+) | Noninverting input | Differential input node; matched to IN− for optimal CMRR performance at G = +100V/V. |
| 4 (VEE) | Negative supply | Ground reference for single-supply operation; supports true rail-to-rail input down to VEE − 0.2V. |
| 5 (FB) | Feedback connection | Internally connected to OUT; not user-accessible - distinguishes MAX4197 from variable-gain MAX4194. |
| 6 (OUT) | Amplifier output | Rail-to-rail output capable of driving 25kΩ loads while maintaining linearity and low THD (0.001%). |
| 7 (VCC) | Positive supply | Accepts +2.7V to +7.5V; PSR = 90dB ensures immunity to supply noise in noisy industrial environments. |
| 8 (SHDN) | Shutdown control | Active-low digital input; pulls internal amplifiers into standby, reducing ICC to 8µA without external circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +100V/V gain | Laser-trimmed internal 25kΩ resistors ensure ±0.05% gain error at +25°C - eliminates calibration overhead in production test. |
| Rail-to-rail input and output | Input extends 200mV below VEE and within 1.1V of VCC; output swings to within 30mV of rails - preserves full ADC input range. |
| Micropower shutdown | Reduces ICC from 93µA to 8µA with <0.5ms wake-up - enables duty-cycled sensing in energy-constrained IoT nodes. |
| High DC precision | 115dB CMRR (G = +100V/V, +25°C), ±50µV VOS (G ≥ +100V/V), and ±15ppm/°C gain drift - meets Class A medical sensor requirements. |
| Single-supply compatibility | Operates from +2.7V to +7.5V with no dual-rail requirement - simplifies power architecture in portable and battery-powered systems. |
Applications
| Thermocouple Amplifier | Bridge Transducer Interface |
|---|---|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K, −200°C to +1350°C) in medical patient monitors and industrial process controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed +100V/V gain, cold-junction compensation interface, and rail-to-rail output for 12-bit+ ADCs. Use Value: ±50µV VOS and 115dB CMRR suppress thermal EMF errors and common-mode noise from heater elements or motor drives. |
Use Scenario: Conditioning differential output from full-bridge strain gauges (120Ω–350Ω) in load cells, pressure sensors, and structural health monitoring. IC Role / Device Role / Timing Role: High-input-impedance, low-noise amplifier rejecting bridge excitation ripple and lead-wire resistance effects. Use Value: Input common-mode range extending 200mV below ground enables direct connection to grounded bridges without level-shifting circuitry. |
| 4–20mA Loop Transmitter | Battery-Powered Data Acquisition |
Use Scenario: Signal conditioning front-end for industrial 4–20mA current-loop transmitters interfacing with RTDs, thermistors, or potentiometric sensors. IC Role / Device Role / Timing Role: Low-power, high-accuracy gain block converting sensor mV outputs to precise current-loop driver inputs. Use Value: 93µA quiescent current and shutdown mode allow integration into loop-powered designs with <4mA total budget. |
Use Scenario: Portable environmental sensor nodes measuring temperature, humidity, or gas concentration using coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Micropower analog front-end delivering stable +100V/V gain with minimal self-heating and long-term offset stability. Use Value: 8µA shutdown current extends battery life beyond 5 years in periodic-sampling applications (e.g., hourly readings). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | G = +100V/V fixed; higher supply current (350µA), wider bandwidth (825kHz), no shutdown function | Requires higher power budget; better suited for high-speed data acquisition where bandwidth >10kHz is needed | Select AD8221ARMZ when system demands faster settling or lower noise density (<10nV/√Hz), accepting higher ICC. |
| LTC6915CMS8 | Digitally programmable gain (1–100V/V); 125µA ICC; 100dB CMRR (G = +100V/V); no shutdown | Enables software-configurable gain scaling but lacks hardware shutdown and has lower CMRR than MAX4197ESA | Choose LTC6915CMS8 only if gain flexibility across multiple sensor types justifies trade-offs in precision and power efficiency. |
Compared with AD8221ARMZ and LTC6915CMS8, the MAX4197ESA offers the lowest quiescent current (93µA), highest guaranteed CMRR at +100V/V (90dB min over temp), and integrated shutdown - making it optimal for ultra-low-power, high-precision, fixed-gain sensor interfaces where board space and battery life are constrained.
Availability
MAX4197ESA is available at Aetrix Electronics and suitable for medical equipment, thermocouple amplification, 4–20mA loop transmitters, battery-powered instrumentation, and bridge transducer interfaces requiring stable component supply and long-term lifecycle support.
Supply support for MAX4197ESA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, medical, and automotive applications, with emphasis on low-power, high-accuracy signal conditioning.
The MAX4194–MAX4197 family was engineered specifically for micropower, single-supply instrumentation amplifier applications - targeting sensor front-ends where rail-to-rail operation, sub-100µA current, and fixed-gain stability are mandatory.
FAQ
What is the maximum operating supply voltage for the MAX4197ESA?
The MAX4197ESA supports a supply voltage range of +2.7V to +7.5V for single-supply operation, or ±1.35V to ±3.75V for dual supplies. Absolute maximum supply voltage is +8V (VCC to VEE). Exceeding this risks permanent damage. The device maintains full specification compliance across its rated range, including 93µA quiescent current and 115dB CMRR at +5V.
Does the MAX4197ESA require external gain-setting resistors?
No, the MAX4197ESA does not require external gain-setting resistors. It is a fixed-gain device with G = +100V/V implemented using on-chip, laser-trimmed 25kΩ resistors. Unlike the MAX4194, pins 1 (RG−) and 8 (RG+) are unused in the MAX4197ESA and must be left unconnected. This eliminates gain drift from external resistor tolerances and temperature coefficients.
What is the typical input offset voltage of the MAX4197ESA over temperature?
The MAX4197ESA has a maximum input offset voltage of ±50µV over the full operating temperature range (−40°C to +85°C) at G = +100V/V. At +25°C, typical VOS is ±25µV. This tight offset, combined with ±15ppm/°C gain drift, ensures stable DC accuracy in precision measurement systems without periodic recalibration.
Can the MAX4197ESA drive a 5kΩ load while maintaining rail-to-rail output swing?
Yes, the MAX4197ESA can drive a 5kΩ load tied to VCC/2 and still achieve rail-to-rail output swing within 100mV of both rails (VOL ≤ 100mV, VOH ≥ VCC − 100mV). This is specified in the Electrical Characteristics table and confirmed in Typical Operating Characteristics plots. For best linearity under heavy load, keep VREF = VCC/2 and minimize capacitive loading beyond 300pF.
How does the shutdown function work on the MAX4197ESA?
The MAX4197ESA's SHDN pin (pin 8) is an active-low digital input. Pulling SHDN ≤ VIL (VCC − 2.5V) disables internal amplifiers and reduces quiescent current to 8µA (typ). The output enters high-impedance state. Release SHDN to VCC − 1.5V or higher to re-enable; enable time is 0.5ms (0.1% settling). No external pull-up is required - internal bias ensures defined state at power-up.
MAX4197ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.06V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 3.1 kHz
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 93µA
- Current - Output / Channel:
- 4.5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 7.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4197ESA FAQ
1.How can I place an order for MAX4197ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4197ESA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4197ESA reliable?
The price and inventory of MAX4197ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4197ESA is usually 5 days.
3.What payment methods are accepted for MAX4197ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4197ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4197ESA?
MAX4197ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4197ESA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4197ESA?
For technical support, including MAX4197ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4197ESA requirements.
6.How does Aetrix verify that MAX4197ESA is sourced from the original manufacturer or authorized distributors?
All MAX4197ESA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4197ESA meets industry standards.
7.What is the process for return or replacement of MAX4197ESA?
All MAX4197ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4197ESA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4197ESA part is unused and in its original packaging.
Return procedure for MAX4197ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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