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Analog Devices Inc./Maxim Integrated MAX4131ESA+T
- Part No.:
- MAX4131ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4131ESA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
MAX4131ESA+T from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, single-supply precision signal conditioning. It delivers 10MHz gain-bandwidth, 900µA quiescent current per amplifier, ±0.20mV typical input offset voltage (25°C), and full rail-to-rail swing into 250Ω loads - enabling high-fidelity analog front-ends in battery-powered data-acquisition systems.
For engineers reviewing the MAX4131ESA+T datasheet, MAX4131ESA+T pinout, MAX4131ESA+T application, or MAX4131ESA+T equivalent, key selection criteria include shutdown functionality (25µA), capacitive-load stability up to 160pF, operation down to +2.7V supply, and SO-8 package compatibility with legacy layouts and automated assembly.
Technical Context
The MAX4131ESA+T employs a dual-input-stage architecture (NPN/PNP) to achieve rail-to-rail common-mode input range extending 200mV beyond VEE and VCC, with seamless transition near VCC/2 to minimize CMRR degradation. Its unity-gain-stable, voltage-feedback topology supports stable operation with 160pF capacitive loads without external compensation.
It features an active shutdown control (SHDN pin) that places the output in high-impedance state and reduces supply current to ≤40µA (–40°C to +85°C), while maintaining fast enable/disable timing (tON = 1µs, tOFF = 0.2µs at VCC = 3V). Input protection includes 1kΩ series resistors and back-to-back diodes limiting differential input voltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 10MHz - enables stable closed-loop operation up to ~1MHz at AV = 10, suitable for anti-aliasing and sensor amplification. |
| Supply Current per Amplifier | 900µA at VCC = 2.7V - supports >100-hour operation on coin-cell batteries in portable instrumentation. |
| Input Offset Voltage (25°C) | ±0.20mV - ensures <0.01% gain error in 20-bit ADC front-ends with 5V full-scale reference. |
| Rail-to-Rail Output Swing | Within 25mV of rails into 250Ω load at VCC = 5V - maximizes dynamic range in single-supply 3.3V/5V systems. |
| Shutdown Supply Current | ≤40µA over –40°C to +85°C - enables ultra-low-power sleep modes in always-on monitoring nodes. |
| Capacitive-Load Stability | Stable with up to 160pF - eliminates need for isolation resistors when driving ADC input capacitance or long traces. |
| Slew Rate | 4V/µs - supports clean 10kHz sine-wave reproduction with <0.003% THD at 2VP-P. |
Pinout & Package
MAX4131ESA+T is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, RoHS-compliant lead finish, and JEDEC MS-012AC outline. The package supports reflow soldering per J-STD-020 and provides thermal resistance θJA = 170°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads directly; high-impedance during shutdown. |
| 2 | IN− | Inverting input - accepts feedback network; protected by 1kΩ series resistor and diode clamps. |
| 3 | IN+ | Noninverting input - accepts sensor/reference signals; rail-to-rail common-mode range (VEE −0.2V to VCC +0.2V). |
| 4 | VEE | Negative supply - connect to GND for single-supply operation; serves as reference for rail-to-rail output swing. |
| 5 | VCC | Positive supply - operates from +2.7V to +6.5V; requires 0.1µF ceramic + ≥1µF bulk bypassing. |
| 6 | N.C. | No connection - not internally bonded; leave unconnected or ground for mechanical stability (not required). |
| 7 | SHDN | Shutdown control - logic-high (≥2.0V) or open enables amplifier; logic-low (≤0.8V) disables with 25–40µA ICC. |
| 8 | N.C. | No connection - not internally bonded; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 2.7V–6.5V supply range - preserves signal headroom in low-voltage microcontroller interfaces. |
| 10MHz GBWP + 4V/µs SR | Supports high-speed sensor buffering (e.g., piezoelectric, strain gauge) without phase lag or slew-induced distortion. |
| 25µA shutdown current | Reduces system standby power by >97% vs active mode - critical for energy-harvesting and battery-life-critical designs. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output states when inputs exceed supply rails - improves robustness in noisy environments. |
| Stable with 160pF capacitive load | Eliminates need for output isolation resistors when driving SAR ADC inputs or long PCB traces - simplifies layout. |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous acquisition of thermistor, RTD, or ECG signals powered by CR2032 or Li-ion cells. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between sensor bridge and 16–20-bit SAR ADC, operating at 3.3V single supply. Use Value: Rail-to-rail I/O and 0.2mV VOS preserve measurement resolution; 900µA ICC extends battery life to >1 year in 1Hz sampling mode. |
Use Scenario: Front-end amplification for wearable pulse oximetry or glucose monitor analog channels. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding programmable-gain amplifier and ADC in compact wearable PCB. Use Value: 22nV/√Hz input noise and <0.003% THD ensure clinical-grade signal fidelity; shutdown mode cuts idle power during sensor sleep cycles. |
| Industrial Process Transmitters | Low-Voltage Test Equipment |
Use Scenario: 4–20mA loop-powered transmitter conditioning temperature or pressure sensor outputs. IC Role / Device Role / Timing Role: Rail-to-rail output driver interfacing with DAC-controlled current source, operating from 3.3V auxiliary rail. Use Value: Output swing within 25mV of rails ensures full 16-bit DAC code utilization; 10MHz GBWP supports fast calibration routines. |
Use Scenario: Portable oscilloscope probe amplifier or handheld multimeter input stage. IC Role / Device Role / Timing Role: High-speed, low-offset buffer isolating DUT from meter input impedance and protecting against overvoltage transients. Use Value: Input protection (1kΩ + diodes) withstands ±10V differential faults; 160pF load stability allows direct connection to scope input capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.02µV/°C TCVOS vs. MAX4131ESA+T's ±2µV/°C; higher 350µA ICC; no shutdown. | Better DC accuracy for <1Hz sensor apps; unsuitable where shutdown or 10MHz BW is required. | Choose OPA333AIDBVR only if sub-µV drift dominates over bandwidth and power constraints. |
| AD8605ARTZ-REEL7 | Higher 10MHz GBWP same; lower 1pA IB vs. 150nA; no shutdown; 500µA ICC; SO-8 compatible. | Superior for high-impedance pH or photodiode sensors; lacks shutdown for intermittent operation. | Choose AD8605ARTZ-REEL7 when ultra-low input bias current is mandatory and shutdown is unnecessary. |
Compared with OPA333AIDBVR and AD8605ARTZ-REEL7, MAX4131ESA+T uniquely balances 10MHz bandwidth, rail-to-rail I/O, integrated shutdown, and SO-8 compatibility - making it optimal for cost-sensitive, battery-operated signal chains requiring both speed and power gating.
Availability
MAX4131ESA+T is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, and industrial process transmitters requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX4131ESA+T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4130–MAX4134 family was designed specifically for precision, low-voltage, single-supply signal conditioning - targeting data-acquisition systems where rail-to-rail operation, low power, and robust input/output drive are essential.
FAQ
What is the maximum operating supply voltage for MAX4131ESA+T?
The MAX4131ESA+T supports a maximum supply voltage of +6.5V between VCC and VEE. Absolute maximum rating is 7.5V, but operation above +6.5V violates specifications and risks parametric noncompliance. For dual-supply use, it operates from ±1.35V to ±3.25V. Always observe derating curves in the datasheet for continuous power dissipation at elevated temperatures.
Does MAX4131ESA+T support true rail-to-rail input common-mode range?
Yes, MAX4131ESA+T supports rail-to-rail input common-mode voltage range from VEE −0.2V to VCC +0.2V at TA = −40°C to +85°C. This is achieved via complementary NPN/PNP input pairs with extended switchover region near VCC/2, ensuring stable operation even when inputs approach or slightly exceed supply rails - critical for sensor interfaces in low-voltage systems.
Can MAX4131ESA+T drive a 250Ω load while maintaining rail-to-rail output swing?
Yes, MAX4131ESA+T is explicitly characterized to drive 250Ω loads with rail-to-rail output swing: at VCC = 5V, VOH is within 25mV of VCC and VOL is within 190mV of VEE. At VCC = 2.7V, output swing remains within 30mV of VEE and 240mV of VCC into 250Ω - enabling full dynamic range utilization in 3.3V and 5V data-acquisition channels.
What is the shutdown behavior of MAX4131ESA+T?
When SHDN is pulled low (≤0.8V), MAX4131ESA+T enters shutdown mode: supply current drops to ≤40µA over temperature, and the output transitions to high-impedance state. The amplifier resumes normal operation within 1µs after SHDN rises above 2.0V. No external pull-up is required - floating SHDN defaults to enabled state due to internal biasing.
Is MAX4131ESA+T stable with capacitive loads, and what is the limit?
Yes, MAX4131ESA+T is unity-gain stable and characterized for capacitive-load stability up to 160pF with no external compensation. This is verified across all operating conditions (VCC = 2.7V to 6.5V, –40°C to +85°C). Driving larger capacitive loads (e.g., >200pF) requires an isolation resistor (e.g., 39Ω) in series with the output to maintain phase margin and prevent peaking or oscillation.
MAX4131ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4131ESA+T FAQ
1.How can I place an order for MAX4131ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4131ESA+T 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 MAX4131ESA+T reliable?
The price and inventory of MAX4131ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4131ESA+T is usually 5 days.
3.What payment methods are accepted for MAX4131ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4131ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4131ESA+T?
MAX4131ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4131ESA+T 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 MAX4131ESA+T?
For technical support, including MAX4131ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4131ESA+T requirements.
6.How does Aetrix verify that MAX4131ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4131ESA+T 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 MAX4131ESA+T meets industry standards.
7.What is the process for return or replacement of MAX4131ESA+T?
All MAX4131ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4131ESA+T, 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 MAX4131ESA+T part is unused and in its original packaging.
Return procedure for MAX4131ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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