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Analog Devices Inc./Maxim Integrated MAX4237AESA
- Part No.:
- MAX4237AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4237AESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,673
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Product details
Overview
MAX4237AESA 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 +3V/+5V systems. It features 20µV max input offset voltage (Grade A), 2µV/°C max offset drift, 1pA input bias current, 7.5MHz gain-bandwidth product (for AV ≥ 5V/V), and shutdown mode with 0.1µA quiescent current - ideal for piezoelectric sensor front-ends and battery-powered instrumentation.
For engineers reviewing the MAX4237AESA datasheet, MAX4237AESA pinout, MAX4237AESA application, or MAX4237AESA equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world use cases in electrochemical and strain gauge systems, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The MAX4237AESA employs a CMOS input stage enabling ultra-low input bias current (1pA) and ground-sensing input common-mode range (VEE − 0.15V to VCC − 1.2V). Its internal architecture supports stable closed-loop operation at gains ≥ 5V/V, delivering 7.5MHz GBWP and 1.3V/µs slew rate while maintaining rail-to-rail output swing (≤150mV from rails into 1kΩ).
It integrates a dedicated SHDN pin that forces output into high-impedance state and reduces ICC to <0.1µA. The device is fully specified over −40°C to +85°C, with Grade A SO-8 variants 100% tested for 20µV max VOS and 2µV/°C max TCVOS at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - enables stable amplification of signals up to ~1.5MHz at AV = 5V/V with <0.1dB gain flatness. |
| Input Offset Voltage (max) | 20µV at +25°C (Grade A) - ensures ≤0.0004% error in 5V full-scale precision measurement paths. |
| Offset Voltage Drift (max) | 2µV/°C - contributes ≤160µV total drift across −40°C to +85°C operating range. |
| Input Bias Current | 1pA typical - preserves signal integrity in high-impedance sensor interfaces (e.g., >1GΩ piezoelectric transducers). |
| Rail-to-Rail Output Swing | Within 150mV of VCC/VEE into 1kΩ - maximizes dynamic range in +3V/+5V single-supply data acquisition stages. |
| Quiescent Current | 350µA normal mode / 0.1µA shutdown - supports µA-level power budgeting in always-on sensor nodes. |
| Capacitive Load Drive | 200pF stable - allows direct driving of ADC input capacitors or long PCB traces without external isolation. |
Pinout & Package
MAX4237AESA is supplied in an 8-pin SO (SOIC-N) surface-mount package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N.C.) | No Connection | Not internally bonded; must remain unconnected on PCB. |
| 2 (IN−) | Inverting Input | Differential input node; accepts feedback network for closed-loop gain ≥5V/V configuration. |
| 3 (IN+) | Noninverting Input | High-impedance sensor interface point; supports ground-referenced inputs down to VEE − 0.15V. |
| 4 (VEE) | Negative Supply | Connect to GND in single-supply operation; bypass with 0.1µF capacitor for noise suppression. |
| 5 (N.C.) | No Connection | Not internally bonded; must remain unconnected on PCB. |
| 6 (OUT) | Amplifier Output | Rail-to-rail voltage source; enters high-Z state during shutdown (SHDN = low). |
| 7 (VCC) | Positive Supply | Accepts +2.4V to +5.5V; bypass with 0.1µF capacitor near pin for PSRR optimization. |
| 8 (SHDN) | Shutdown Control | Active-low logic input; VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC; 4µs recovery time to active mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | 2µV/°C max (Grade A) - eliminates recalibration needs in industrial temperature-varying environments. |
| Ground-sensing input | Common-mode range extends to VEE − 0.15V - enables direct interfacing with 0V-referenced sensors like thermocouples. |
| Shutdown functionality | 0.1µA quiescent current + high-Z output - permits dynamic power gating in multi-channel sensor arrays. |
| Single-supply rail-to-rail output | Swings within 150mV of VCC/VEE into 1kΩ - preserves >94% of full-scale range in +3V systems. |
| Low-frequency noise | 0.2µVP-P (0.1Hz–10Hz) - critical for DC-stable amplification of slow-varying electrochemical signals. |
Applications
| Strain Gauge Signal Conditioning | Piezoelectric Sensor Front-End |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil or semiconductor strain gauges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (gain ≥ 5V/V) with ultra-low input current to prevent bridge imbalance errors. Use Value: 20µV max VOS and 2µV/°C drift ensure ≤0.004% full-scale error stability over industrial temperature range. |
Use Scenario: Charge-to-voltage conversion and amplification of high-impedance piezoelectric elements in vibration and impact sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier input stage with 1pA IB to minimize signal attenuation and low-frequency droop. Use Value: 0.2µVP-P 0.1Hz–10Hz noise enables resolution of sub-mV mechanical events without AC coupling. |
| Thermocouple Amplifier | Battery-Powered Portable Instrumentation |
|
Use Scenario: Cold-junction compensation and linear amplification of µV-level thermocouple outputs (e.g., Type K, J) in temperature monitoring systems. IC Role / Device Role / Timing Role: Ground-sensing, low-drift op amp configured as differential amplifier with matched resistor networks. Use Value: Input common-mode range including VEE allows direct connection to thermocouple junctions referenced to system ground. |
Use Scenario: Analog front-end for handheld multimeters, gas detectors, or environmental sensors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power, high-accuracy signal conditioner enabling >10-year shelf life via 0.1µA shutdown current. Use Value: 350µA active ICC and 7.5MHz GBWP support fast settling (<1µs) for multiplexed multi-sensor readouts. |
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 | 17µV max VOS, 0.1µV/°C drift, 350kHz GBWP, no shutdown pin | Limited bandwidth restricts use in fast-settling or higher-frequency sensor interfaces | Select when ultra-low drift dominates over speed and shutdown is unnecessary |
| LTC2050CS8#PBF | 3µV max VOS, 0.05µV/°C drift, 3MHz GBWP, 1.5V/µs slew rate, shutdown capable | Higher supply current (1.1mA) and cost; requires dual supply for optimal CMRR | Select when sub-5µV offset and <0.1µV/°C drift justify higher power and BOM cost |
Compared with OPA333AIDR and LTC2050CS8#PBF, the MAX4237AESA uniquely balances 20µV/2µV/°C precision, 7.5MHz bandwidth, 0.1µA shutdown, and SO-8 compatibility - making it optimal for space-constrained, battery-aware, medium-speed precision analog front-ends.
Availability
MAX4237AESA is available at Aetrix Electronics and suitable for strain gauge signal conditioning, piezoelectric sensor front-ends, and battery-powered portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX4237AESA 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 high-performance analog and mixed-signal ICs for precision sensing, power management, and communications.
The MAX4236/MAX4237 family targets high-accuracy, low-power signal conditioning in single-supply industrial and portable measurement systems - emphasizing ultra-low offset, near-zero input current, and rail-to-rail operation.
FAQ
What is the maximum stable closed-loop gain for MAX4237AESA?
The MAX4237AESA is specified for stable operation at closed-loop gains greater than 5V/V. This is a key distinction from the unity-gain-stable MAX4236 variant. Gain configurations below 5V/V may exhibit peaking or instability, especially with capacitive loads. Always verify phase margin using the open-loop gain/phase plots in the MAX4237AESA datasheet under your specific supply voltage and load conditions.
Does MAX4237AESA support true single-supply operation from +3V?
Yes, MAX4237AESA operates from +2.4V to +5.5V single supply. Its input common-mode range extends to VEE − 0.15V (i.e., −0.15V when VEE = GND), and its rail-to-rail output swings within 150mV of both rails into 1kΩ. At +3V supply, this delivers >2.7V output span - sufficient for driving 12-bit+ SAR ADCs without level-shifting circuitry.
How does the shutdown function affect the output state of MAX4237AESA?
When the SHDN pin is pulled low, the MAX4237AESA disables its internal circuitry, 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 DC path errors. Recovery to active mode takes 4µs (typical) with RL = 1kΩ, as confirmed in the MAX4237AESA electrical characteristics table.
Is the 20µV maximum input offset voltage guaranteed over temperature for MAX4237AESA?
No - the 20µV maximum input offset voltage (VOS) is guaranteed only at +25°C for Grade A SO-8 packages like MAX4237AESA. Over the full −40°C to +85°C range, max VOS is ±150µV. However, the 2µV/°C maximum offset drift (TCVOS) is 100% tested for Grade A SO-8 devices, enabling accurate worst-case VOS calculation across temperature.
Can MAX4237AESA drive a 1000pF capacitive load?
No - MAX4237AESA is characterized for stable operation with up to 200pF capacitive load (CLOAD), per the Electrical Characteristics table. Driving 1000pF directly risks oscillation or excessive overshoot. For larger loads, add an isolation resistor (e.g., 10–50Ω) between MAX4237AESA output and the capacitance, or use a dedicated buffer stage.
MAX4237AESA 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:
- 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 FAQ
1.How can I place an order for MAX4237AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237AESA 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 reliable?
The price and inventory of MAX4237AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237AESA is usually 5 days.
3.What payment methods are accepted for MAX4237AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237AESA?
MAX4237AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237AESA 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?
For technical support, including MAX4237AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237AESA requirements.
6.How does Aetrix verify that MAX4237AESA is sourced from the original manufacturer or authorized distributors?
All MAX4237AESA 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 meets industry standards.
7.What is the process for return or replacement of MAX4237AESA?
All MAX4237AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237AESA, 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 part is unused and in its original packaging.
Return procedure for MAX4237AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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