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Analog Devices Inc./Maxim Integrated MAX4237AEUA-T
- Part No.:
- MAX4237AEUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4237AEUA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,091
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Product details
Overview
The MAX4237AEUA-T from Maxim Integrated is a high-precision, rail-to-rail output operational amplifier optimized for low-noise, low-input-bias-current applications with single +3V/+5V supply operation. It features 7.5MHz gain-bandwidth product (AV ≥ 5V/V), 20µV max input offset voltage at +25°C (Grade A), 1pA input bias current, and shutdown mode reducing quiescent current to 0.1µA. It is used in electrochemical sensor front-ends and thermocouple amplifiers requiring stable DC accuracy.
For engineers reviewing the MAX4237AEUA-T datasheet, MAX4237AEUA-T pinout, MAX4237AEUA-T application, or MAX4237AEUA-T equivalent, key selection criteria include guaranteed 20µV offset (Grade A), 2µV/°C drift, rail-to-rail output swing into 1kΩ, ground-sensing input common-mode range extending to VEE − 0.15V, and 200pF capacitive load stability without external compensation.
Technical Context
The MAX4237AEUA-T employs a CMOS input stage enabling ultra-low 1pA input bias current and 14nV/√Hz input voltage noise density. Its architecture supports stable closed-loop operation at gains ≥5V/V, delivering 7.5MHz GBWP and 1.3V/µs slew rate while maintaining >100dB open-loop gain over temperature.
It integrates a dedicated SHDN pin that forces output into high-impedance state and reduces ICC to <0.1µA. Input common-mode range spans (VEE − 0.15V) to (VCC − 1.2V), and output swings within 150mV of rails into 1kΩ - enabling full dynamic range utilization in single-supply +3V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - enables stable closed-loop gain ≥5V/V with sufficient phase margin for precision signal conditioning |
| Input Offset Voltage (max) | 20µV at +25°C (Grade A) - ensures ≤0.04% error in 500mV full-scale sensor outputs |
| Offset Voltage Drift (max) | 2µV/°C - limits drift-induced error to <170µV across −40°C to +85°C industrial range |
| Input Bias Current | 1pA - prevents significant voltage error across >1GΩ source impedances (e.g., piezoelectric sensors) |
| Rail-to-Rail Output Swing | Within 150mV of VCC/VEE into 1kΩ - maximizes usable output range in +3V single-supply systems |
| Shutdown Quiescent Current | 0.1µA - extends battery life in portable instrumentation during idle periods |
| Capacitive Load Stability | 200pF - allows direct driving of ADC input capacitance or long PCB traces without oscillation |
Pinout & Package
MAX4237AEUA-T is packaged in an 8-pin µMAX (3mm × 3mm, 0.8mm height) with exposed pad for thermal performance. Pin 1 is marked by a dot; pin numbering follows standard µMAX convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | High-impedance in shutdown; rail-to-rail swing into 1kΩ; drives ADC inputs or downstream buffers |
| 2 (VEE) | Negative supply / GND reference | Connect to system ground in single-supply mode; bypass with 0.1µF capacitor for PSRR optimization |
| 3 (IN+) | Noninverting input | CMOS input with 1pA bias; accepts signals down to VEE − 0.15V (ground-sensing capability) |
| 4 (IN−) | Inverting input | Differential pair input; matched to IN+ for <20µV offset and >102dB CMRR |
| 5 (N.C.) | No connection | Not internally bonded; leave unconnected; no routing or grounding required |
| 6 (SHDN) | Shutdown control | Logic-low (≤0.3×VCC) disables amplifier and places OUT in high-Z; requires pull-up for normal operation |
| 7 (N.C.) | No connection | Not internally bonded; leave unconnected; no routing or grounding required |
| 8 (VCC) | Positive supply | Operates from +2.4V to +5.5V; bypass with 0.1µF capacitor near pin to suppress supply noise |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset voltage drift | 2µV/°C max (Grade A) - maintains calibration integrity over extended temperature excursions in field-deployed sensors |
| Ground-sensing input stage | Input common-mode range includes VEE − 0.15V - enables direct interfacing to transducers referenced to system ground |
| Shutdown with high-Z output | 0.1µA ICC and tri-stated output - eliminates loading on downstream circuitry during power-gating sequences |
| Single-supply rail-to-rail output | Swings within 150mV of VCC/VEE into 1kΩ - preserves >94% of +3V supply range for analog signal headroom |
| Low-frequency noise performance | 0.2µVP-P (0.1Hz–10Hz) - critical for DC-coupled electrochemical measurements where 1/f noise dominates |
Applications
| Strain Gauge Signal Conditioning | Piezoelectric Sensor Interface |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil or semiconductor strain gauges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Primary instrumentation amplifier stage providing gain, offset trimming, and drive capability for 24-bit sigma-delta ADCs. Use Value: 20µV max offset and 2µV/°C drift minimize zero-point drift; 1pA input bias avoids bridge imbalance errors from high-resistance gauge elements. |
Use Scenario: Charge-to-voltage conversion for piezoelectric accelerometers and acoustic emission sensors generating pico-coulomb-level charge pulses. IC Role / Device Role / Timing Role: Low-bias-current integrator front-end converting transducer charge into proportional voltage with minimal leakage-induced droop. Use Value: 1pA input bias enables >100s time constants with 1nF feedback capacitors; rail-to-rail output maximizes dynamic range for pulse amplitude measurement. |
| Thermocouple Amplification | Electrochemical Sensor Front-End |
|
Use Scenario: Cold-junction-compensated amplification of µV-level Seebeck voltages from K-type or J-type thermocouples in industrial temperature monitoring. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage rejecting common-mode noise while preserving microvolt-level signal integrity. Use Value: 102dB CMRR and 120dB PSRR suppress line-frequency interference and supply ripple; 14nV/√Hz noise floor resolves <100nV signal increments. |
Use Scenario: Transimpedance amplification of nanoamp-level currents from pH electrodes, dissolved oxygen sensors, and glucose biosensors. IC Role / Device Role / Timing Role: Ultra-high-impedance current-to-voltage converter with guarded input traces and low input capacitance (7.5pF). Use Value: 1pA input bias prevents polarization errors in potentiostatic circuits; 0.2µVP-P low-frequency noise enables stable DC baseline for ppm-level gas concentration detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | 17µV max offset (25°C), 0.1µV/°C drift, 350nA input bias, unity-gain stable, 350kHz GBWP | Lower bandwidth and higher input bias limit use in fast piezoelectric pulse response or high-impedance electrochemical sensing | Select when ultra-low drift dominates over bandwidth and input current requirements |
| LTC2050CS5#TRMPBF | 5µV max offset (25°C), 0.05µV/°C drift, 30pA input bias, unity-gain stable, 3MHz GBWP | Higher input bias than MAX4237AEUA-T disqualifies it for >10GΩ source impedances; superior drift suits metrology-grade calibration | Select when sub-10µV offset and <0.1µV/°C drift are mandatory, and 1pA bias is not required |
Compared with OPA333AIDBVR and LTC2050CS5#TRMPBF, the MAX4237AEUA-T uniquely balances 1pA input bias, 20µV/2µV/°C Grade A specifications, and 7.5MHz bandwidth - making it optimal for battery-powered, high-impedance sensor interfaces demanding both speed and DC precision.
Availability
MAX4237AEUA-T is available at Aetrix Electronics and suitable for strain gauge instrumentation, piezoelectric sensor interfaces, and electrochemical sensor front-ends requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4237AEUA-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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4236/MAX4237 family was engineered for high-accuracy, low-power sensor signal conditioning - specifically targeting applications where chopper-stabilized amplifiers introduce unwanted switching artifacts or increased noise.
FAQ
What is the maximum guaranteed input offset voltage for MAX4237AEUA-T at +25°C?
The MAX4237AEUA-T is Grade A specified with a maximum input offset voltage of 20µV at +25°C, tested and guaranteed per Maxim's production test flow for the 8-pin µMAX package. This value is confirmed in the Electrical Characteristics table under "Input Offset Voltage (VOS)" for SO-8/µMAX packages, and applies directly to the MAX4237AEUA-T variant.
Does MAX4237AEUA-T support single-supply operation, and what is its minimum supply voltage?
Yes, the MAX4237AEUA-T supports true single-supply operation from +2.4V to +5.5V. Its minimum supply voltage is 2.4V, verified across the full −40°C to +85°C operating range. At 2.4V, it maintains rail-to-rail output swing, 1pA input bias current, and functional shutdown mode - enabling compatibility with Li-ion battery-powered systems.
What is the capacitive load drive capability of MAX4237AEUA-T, and is external compensation required?
The MAX4237AEUA-T is stable driving up to 200pF capacitive loads without external compensation, as specified in both SO-8 and µMAX package electrical characteristics tables. This capability allows direct connection to ADC input capacitors or long PCB traces, eliminating the need for isolation resistors or feedback network adjustments in most data acquisition designs.
How does the shutdown function affect the output state of MAX4237AEUA-T?
When the SHDN pin is pulled low (≤0.3×VCC), the MAX4237AEUA-T enters shutdown mode, reducing quiescent current to <0.1µA and forcing the output into a high-impedance (tri-state) condition. This prevents loading of downstream circuitry and eliminates signal contention - a critical feature in multiplexed sensor systems or power-gated subsystems.
Is MAX4237AEUA-T pin-compatible with other members of the MAX4236/MAX4237 family in the µMAX package?
Yes, all MAX4236/MAX4237 variants in the 8-pin µMAX package (e.g., MAX4236AEUA, MAX4237BEUA) share identical pinouts per the Pin Description table. The MAX4237AEUA-T uses pins 1–4 and 6–8 identically; pins 5 and 7 are N.C. and electrically isolated - ensuring drop-in replacement between grade and gain variants without layout changes.
MAX4237AEUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.3V/µs
- Gain Bandwidth Product:
- 7.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4237AEUA-T FAQ
1.How can I place an order for MAX4237AEUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237AEUA-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 MAX4237AEUA-T reliable?
The price and inventory of MAX4237AEUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237AEUA-T is usually 5 days.
3.What payment methods are accepted for MAX4237AEUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237AEUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237AEUA-T?
MAX4237AEUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237AEUA-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 MAX4237AEUA-T?
For technical support, including MAX4237AEUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237AEUA-T requirements.
6.How does Aetrix verify that MAX4237AEUA-T is sourced from the original manufacturer or authorized distributors?
All MAX4237AEUA-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 MAX4237AEUA-T meets industry standards.
7.What is the process for return or replacement of MAX4237AEUA-T?
All MAX4237AEUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237AEUA-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 MAX4237AEUA-T part is unused and in its original packaging.
Return procedure for MAX4237AEUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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