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Analog Devices Inc./Maxim Integrated MAX4237AESA-T
- Part No.:
- MAX4237AESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4237AESA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
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Product details
Overview
The MAX4237AESA-T from Maxim Integrated is a high-precision, rail-to-rail output operational amplifier optimized for low-noise, low-input-bias-current signal conditioning in single-supply systems. It features 20 µV max input offset voltage (Grade A), 2 µV/°C max offset drift, 1 pA input bias current, and 7.5 MHz gain-bandwidth product for closed-loop gains ≥5 V/V - enabling high-accuracy amplification of piezoelectric sensor outputs, thermocouple signals, and electrochemical transducer voltages.
For engineers reviewing the MAX4237AESA-T datasheet, MAX4237AESA-T pinout, MAX4237AESA-T application, or MAX4237AESA-T equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world use cases in battery-powered instrumentation, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The MAX4237AESA-T uses a CMOS input stage to achieve ultra-low input bias current (1 pA) and low voltage noise (14 nV/√Hz), making it suitable for high-impedance sensor interfaces where charge leakage must be minimized. Its ground-sensing input (common-mode range extends to VEE − 0.15 V) and rail-to-rail output (within 150 mV of rails into 1 kΩ) support full dynamic range utilization on +3 V or +5 V single supplies.
This device is internally compensated for stable operation at closed-loop gains ≥5 V/V, with 7.5 MHz GBWP and 1.3 V/µs slew rate. The integrated shutdown function reduces quiescent current to 0.1 µA and places the output in high-impedance state - critical for power-constrained portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 20 µV (max) at +25°C - ensures minimal DC error in precision DC-coupled amplifiers like thermocouple front-ends. |
| Offset Voltage Drift | 2 µV/°C (max) - maintains accuracy across industrial temperature range (−40°C to +85°C) without recalibration. |
| Input Bias Current | 1 pA (typ) - enables use with high-impedance sources (e.g., piezoelectric sensors, pH electrodes) without significant signal loss. |
| Gain-Bandwidth Product | 7.5 MHz - supports stable amplification at gain ≥5 V/V for bandwidth-critical sensor signal chains (e.g., strain gauge bridge outputs). |
| Rail-to-Rail Output Swing | Within 150 mV of supply rails into 1 kΩ - maximizes usable output voltage range on +3 V or +5 V single supplies. |
| Quiescent Supply Current | 350 µA (typ) in active mode; 0.1 µA in shutdown - enables multi-year battery life in portable instrumentation with duty-cycled operation. |
| Capacitive Load Drive | Stable with up to 200 pF - accommodates PCB trace capacitance and filtering networks without oscillation. |
Pinout & Package
MAX4237AESA-T is supplied in an 8-pin SO (SOIC-N) package with standard 150-mil width and 1.27 mm pitch. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - rail-to-rail capable, high-impedance in shutdown mode when SHDN = low. |
| 2 | IN− | Inverting input - differential pair input with 1 pA bias current; requires matched layout for optimal CMRR. |
| 3 | IN+ | Noninverting input - same high-impedance characteristics as IN−; used for reference or sensor signal routing. |
| 4 | VEE | Negative supply pin - connect to GND in single-supply operation; bypass with 0.1 µF capacitor to ground. |
| 5 | N.C. | No internal connection - leave unconnected; no electrical function or thermal path. |
| 6 | VCC | Positive supply input - operates from +2.4 V to +5.5 V; bypass with 0.1 µF capacitor near pin. |
| 7 | SHDN | Active-low shutdown control - logic low (≤0.3 × VCC) disables amplifier and reduces ICC to 0.1 µA. |
| 8 | N.C. | No internal connection - leave unconnected; not used for thermal dissipation or grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset voltage drift | 2 µV/°C max (Grade A) - eliminates need for system-level temperature compensation in field-deployed sensors. |
| Ground-sensing input stage | Common-mode range includes VEE − 0.15 V - allows direct interfacing to transducers referenced to ground in single-supply configurations. |
| Shutdown mode with Hi-Z output | 0.1 µA quiescent current + high-impedance output - prevents loading of downstream circuitry during sleep cycles. |
| High open-loop gain | 110 dB min (RL = 100 kΩ) - ensures <0.01% gain error in unity-gain buffer or low-gain instrumentation stages. |
| Low-frequency noise performance | 0.2 µVp-p (0.1 Hz to 10 Hz) - preserves signal integrity in slow-varying electrochemical and thermocouple measurements. |
Applications
| Strain Gauge Signal Conditioning | Piezoelectric Sensor Interface |
|---|---|
Use Scenario: Amplifying low-level mV-level differential output from a Wheatstone bridge under mechanical load. IC Role / Device Role / Timing Role: Precision noninverting amplifier with gain ≥5 V/V, rejecting common-mode bridge imbalance and supply ripple. Use Value: 20 µV offset and 2 µV/°C drift prevent false strain readings due to thermal gradients; rail-to-rail output fully utilizes ADC input range. |
Use Scenario: Charge-to-voltage conversion for accelerometers and acoustic transducers generating high-impedance, low-charge signals. IC Role / Device Role / Timing Role: Ultra-high-impedance transimpedance amplifier front-end with minimal input current loading. Use Value: 1 pA input bias current minimizes signal attenuation and time-constant errors; 7.5 MHz GBWP supports wideband vibration analysis. |
| Thermocouple Amplifier Stage | Battery-Powered Electrochemical Sensor |
Use Scenario: Cold-junction compensation and linearization of µV-level thermocouple outputs in portable temperature loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier input stage with programmable gain and reference buffering. Use Value: 0.2 µVp-p low-frequency noise preserves microvolt-level thermal EMF resolution; shutdown mode extends coin-cell battery life. |
Use Scenario: Amperometric detection of analyte concentration via current output from glucose or gas sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA–nA sensor currents into measurable voltage with minimal offset-induced baseline shift. Use Value: 20 µV max offset ensures accurate zero-current baseline; 1 pA input bias avoids sensor polarization errors in long-duration assays. |
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 |
|---|---|---|---|
| OPA333AIDR | 17 µV max offset (25°C), 0.1 µV/°C drift, 350 kHz GBWP, no shutdown pin | Limited bandwidth restricts use in fast transient sensing; lacks shutdown for ultra-low-power modes | Prefer for sub-100 kHz DC-coupled applications where lowest drift outweighs speed and power control needs |
| ADA4522-1ARZ | 2.5 µV max offset (25°C), 0.015 µV/°C drift, 3 MHz GBWP, no shutdown | Superior DC precision but lower bandwidth; higher supply current (420 µA) and no power-down capability | Choose when nanovolt-level stability is mandatory and 3 MHz bandwidth suffices; avoid where shutdown or >5 V/V gain is required |
Compared with OPA333AIDR and ADA4522-1ARZ, the MAX4237AESA-T uniquely balances 7.5 MHz bandwidth, 20 µV/2 µV/°C precision, 1 pA input bias, and integrated shutdown - making it optimal for battery-powered, wideband, high-impedance sensor systems requiring both accuracy and power agility.
Availability
MAX4237AESA-T is available at Aetrix Electronics and suitable for strain gauge instrumentation, piezoelectric transducer interfaces, and battery-powered electrochemical sensor designs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX4237AESA-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, medical, and communications applications.
The MAX4236/MAX4237 family was designed specifically for ultra-precision, low-power, single-supply sensor signal conditioning - targeting applications where input bias current, offset drift, and rail-to-rail output swing critically impact measurement fidelity.
FAQ
What is the maximum operating supply voltage for the MAX4237AESA-T?
The MAX4237AESA-T supports a supply voltage range of +2.4 V to +5.5 V on VCC relative to VEE (GND in single-supply mode). Absolute maximum rating is +6 V (VCC − VEE); operation beyond +5.5 V voids guaranteed specifications and risks reliability degradation over time. Always bypass VCC and VEE with 0.1 µF ceramic capacitors placed within 2 mm of the pins.
Does the MAX4237AESA-T support rail-to-rail input operation?
No, the MAX4237AESA-T does not support rail-to-rail input. Its input common-mode voltage range extends from (VEE − 0.15 V) to (VCC − 1.2 V), meaning it can sense down to 0.15 V below ground but cannot accept inputs within 1.2 V of the positive rail. This ground-sensing capability enables true single-supply operation with grounded sensors, but high-side signal monitoring requires level-shifting.
How does the shutdown function affect the output impedance of the MAX4237AESA-T?
When the SHDN pin is pulled low (≤0.3 × VCC), the MAX4237AESA-T disables its output stage and places the OUT pin in a high-impedance state - measured at <10 nA leakage over 0 V to VCC. This prevents loading of downstream circuitry (e.g., ADC inputs or multiplexers) during sleep, unlike op amps that default to tri-state or undefined output behavior in disable mode.
Can the MAX4237AESA-T drive a 100 pF capacitive load without compensation?
Yes, the MAX4237AESA-T is specified to remain stable with capacitive loads up to 200 pF without external compensation. This is confirmed in the Electrical Characteristics table under "Capacitive Load Stability" for both SO-8 and µMAX packages. For loads >200 pF, a series resistor (10–50 Ω) between OUT and the load is recommended to maintain phase margin.
What is the typical input voltage noise density of the MAX4237AESA-T at 1 kHz?
The MAX4237AESA-T has a typical input voltage noise density of 14 nV/√Hz at 1 kHz, as specified in the Electrical Characteristics tables for both SO-8 and SOT23-6 packages. This value is consistent across Grade A and B variants and remains stable over the full −40°C to +85°C operating range, supporting low-noise amplification of weak sensor signals.
MAX4237AESA-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:
- 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-SOIC
MAX4237AESA-T FAQ
1.How can I place an order for MAX4237AESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237AESA-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 MAX4237AESA-T reliable?
The price and inventory of MAX4237AESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237AESA-T is usually 5 days.
3.What payment methods are accepted for MAX4237AESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237AESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237AESA-T?
MAX4237AESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237AESA-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 MAX4237AESA-T?
For technical support, including MAX4237AESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237AESA-T requirements.
6.How does Aetrix verify that MAX4237AESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4237AESA-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 MAX4237AESA-T meets industry standards.
7.What is the process for return or replacement of MAX4237AESA-T?
All MAX4237AESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237AESA-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 MAX4237AESA-T part is unused and in its original packaging.
Return procedure for MAX4237AESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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