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Analog Devices Inc./Maxim Integrated MAX4237BESA
- Part No.:
- MAX4237BESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4237BESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,525
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Product details
Overview
The MAX4237BESA 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 7.5MHz gain-bandwidth product (AV ≥ 5V/V), 1pA input bias current, 200µV max input offset voltage at +25°C (Grade B), and 4.5µV/°C max offset drift - enabling accurate amplification of microvolt-level sensor outputs such as piezoelectric or electrochemical transducers.
For engineers reviewing the MAX4237BESA datasheet, MAX4237BESA pinout, MAX4237BESA application, or MAX4237BESA equivalent, this device is selected where ultra-low input current, ground-sensing input range, shutdown capability (<0.1µA), and stable operation with 5V/V minimum closed-loop gain are required in space-constrained SO-8 designs.
Technical Context
The MAX4237BESA uses a CMOS input stage to achieve 1pA input bias current and rail-to-rail output swing within 150mV of rails into 1kΩ. Its input common-mode range extends from VEE − 0.15V to VCC − 1.2V, supporting true ground-sensing operation in +3V/+5V single-supply configurations.
It employs internal compensation for stability at closed-loop gains ≥ 5V/V, delivering 7.5MHz GBWP and 1.3V/µs slew rate. Shutdown mode disables the amplifier, reducing quiescent current to <0.1µA and placing the output in high-impedance state with 4µs recovery time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - supports stable closed-loop gain ≥ 5V/V up to ~1.5MHz signal bandwidth |
| Input Offset Voltage (max) | 200µV at +25°C (Grade B) - enables DC-coupled amplification of sub-millivolt sensor signals without nulling circuitry |
| Offset Voltage Drift (max) | 4.5µV/°C - ensures ≤ ±0.38mV total offset shift over −40°C to +85°C operating range |
| Input Bias Current | 1pA typical - prevents significant error voltage across high-impedance sources (e.g., >1GΩ piezoelectric sensors) |
| Supply Voltage Range | +2.4V to +5.5V - compatible with standard 3.3V and 5V logic rails without level-shifting |
| Quiescent Current | 350µA normal mode / 0.1µA shutdown - suitable for battery-powered instrumentation with duty-cycled sensing |
| Rail-to-Rail Output Swing | Within 150mV of rails into 1kΩ - maximizes dynamic range in single-supply data acquisition front-ends |
Pinout & Package
MAX4237BESA is supplied in an 8-pin SO (Small Outline) package with exposed pad (SOIC-N), pin-compatible with industry-standard SO-8 footprints. Thermal performance is enhanced by the exposed die paddle, requiring solder connection to PCB ground plane per Maxim layout guidelines.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output terminal - rail-to-rail capable, high-impedance in shutdown mode |
| 2 | IN− | Inverting input - high-impedance CMOS node; sensitive to stray capacitance and EMI |
| 3 | IN+ | Noninverting input - matched to IN− for optimal common-mode rejection |
| 4 | VEE | Negative supply pin - connect to GND in single-supply operation; bypass with 0.1µF capacitor |
| 5 | N.C. | No internal connection - leave unconnected; not electrically tied to die |
| 6 | VCC | Positive supply input - operate from +2.4V to +5.5V; bypass with 0.1µF capacitor |
| 7 | N.C. | No internal connection - leave unconnected; not electrically tied to die |
| 8 | SHDN | Active-low shutdown control - pull to VEE (GND) to enter <0.1µA quiescent mode; must not float |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typical - eliminates voltage error across high-impedance sensor elements and feedback networks |
| Ground-sensing input range | Extends to VEE − 0.15V - allows direct interface to 0V-referenced transducers without level-shifting circuitry |
| Shutdown mode | 0.1µA quiescent current with high-Z output - enables power-gating in multi-channel sensor arrays |
| Capacitive load drive | Stable with up to 200pF - supports direct driving of ADC input capacitors or long PCB traces without isolation resistors |
| Low-frequency noise | 0.2µVP-P (0.1Hz–10Hz) - critical for precision DC measurements in strain gauge and thermocouple applications |
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 rail-to-rail output for 12–24-bit ADCs. Use Value: 200µV max offset and 4.5µV/°C drift minimize calibration burden across industrial temperature ranges; 1pA bias current prevents bridge imbalance errors. |
Use Scenario: Charge-to-voltage conversion for high-impedance piezoelectric accelerometers and acoustic sensors. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance transimpedance amplifier with integrated shutdown for burst-mode sensing. Use Value: 1pA input bias current enables use of minimal feedback capacitance, preserving signal bandwidth and SNR in vibration monitoring systems. |
| Electrochemical Sensor Front-End | Battery-Powered Instrumentation |
|
Use Scenario: Amplifying nanoamp-level currents from pH, dissolved oxygen, or glucose sensors using three-electrode configurations. IC Role / Device Role / Timing Role: Transimpedance amplifier with guarded input and low input current to avoid sensor polarization errors. Use Value: 1pA bias current and 0.2µVP-P low-frequency noise ensure accurate measurement of sub-picoamp sensor currents without signal degradation. |
Use Scenario: Precision analog front-end in portable multimeters, gas detectors, and handheld environmental monitors. IC Role / Device Role / Timing Role: Single-supply signal conditioner enabling >10-year battery life via shutdown-controlled duty cycling. Use Value: 350µA active current and 0.1µA shutdown current allow microcontroller-triggered wake-up for periodic sensor sampling without compromising accuracy. |
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 offset (A-grade), 0.1µV/°C drift, 350kHz GBWP, no shutdown pin | Limited bandwidth restricts use in fast-sampling sensor interfaces; lacks shutdown for ultra-low-power systems | Select when lowest drift dominates over bandwidth and shutdown requirements |
| ADA4522-1ARZ | 2.5µV max offset, 0.015µV/°C drift, 3MHz GBWP, zero-drift architecture | Chopper-stabilized design introduces switching artifacts; unsuitable for charge-sensitive piezo interfaces | Select for ultra-low drift DC applications where chopper noise is acceptable and bandwidth suffices |
Compared with OPA333AIDR and ADA4522-1ARZ, the MAX4237BESA provides higher bandwidth and integrated shutdown while maintaining competitive offset and drift - making it uniquely suited for battery-powered, wideband, high-impedance sensor signal chains requiring both precision and power control.
Availability
MAX4237BESA is available at Aetrix Electronics and suitable for strain gauge interfaces, piezoelectric sensor front-ends, and electrochemical measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4237BESA 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 MAX4237BESA belongs to Maxim's precision op amp product line, engineered for sensor signal conditioning where ultra-low input current, ground-sensing capability, and rail-to-rail output are essential in single-supply environments.
FAQ
What is the maximum input offset voltage specification for MAX4237BESA at +25°C?
The MAX4237BESA (Grade B) has a maximum input offset voltage of 200µV at +25°C, as guaranteed in the SO-8 package electrical characteristics table. This value is tested and specified across the full −40°C to +85°C operating range, with worst-case drift limited to 4.5µV/°C. The MAX4237BESA maintains this performance without chopper stabilization, avoiding switching noise in sensitive analog paths.
Does MAX4237BESA support single-supply operation, and what is its input common-mode range?
Yes, the MAX4237BESA supports single-supply operation from +2.4V to +5.5V. Its input common-mode voltage range extends from VEE − 0.15V to VCC − 1.2V - meaning it operates down to −0.15V when VEE = GND, enabling true ground-sensing capability. This allows direct interfacing with 0V-referenced sensors like strain gauges and thermocouples without level-shifting circuitry.
What is the minimum closed-loop gain required for stable operation of MAX4237BESA?
The MAX4237BESA is internally compensated for stable operation at closed-loop gains of 5V/V or greater. Unlike the unity-gain-stable MAX4236 variant, the MAX4237BESA achieves its 7.5MHz gain-bandwidth product only when configured with AV ≥ 5. Attempting unity-gain use may result in peaking or oscillation; the MAX4237BESA datasheet explicitly specifies "stable for closed-loop gains greater than 5V/V".
How does the shutdown function work on MAX4237BESA, and what is its recovery time?
The MAX4237BESA enters shutdown mode when the SHDN pin is pulled low (≤ 0.3 × VCC). In this state, quiescent current drops below 0.1µA and the output enters a high-impedance state. Recovery occurs within 4µs after SHDN is raised to ≥ 0.7 × VCC, as measured with RL = 1kΩ. The MAX4237BESA requires no external pull-up on SHDN but must never be left floating to prevent erratic behavior.
Is MAX4237BESA pin-compatible with other op amps in the MAX4236/MAX4237 family?
Yes, the MAX4237BESA shares identical SO-8 pinout with MAX4236AESA, MAX4236BESA, MAX4237AESA, and all µMAX variants. Pin functions (OUT, IN−, IN+, VEE, N.C., VCC, N.C., SHDN) are consistent across the family. However, the MAX4237BESA differs electrically from MAX4236 variants in gain stability (≥5V/V vs. unity-gain), GBWP (7.5MHz vs. 1.7MHz), and slew rate (1.3V/µs vs. 0.3V/µs), requiring schematic verification before substitution.
MAX4237BESA 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
MAX4237BESA FAQ
1.How can I place an order for MAX4237BESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237BESA 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 MAX4237BESA reliable?
The price and inventory of MAX4237BESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237BESA is usually 5 days.
3.What payment methods are accepted for MAX4237BESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237BESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237BESA?
MAX4237BESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237BESA 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 MAX4237BESA?
For technical support, including MAX4237BESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237BESA requirements.
6.How does Aetrix verify that MAX4237BESA is sourced from the original manufacturer or authorized distributors?
All MAX4237BESA 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 MAX4237BESA meets industry standards.
7.What is the process for return or replacement of MAX4237BESA?
All MAX4237BESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237BESA, 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 MAX4237BESA part is unused and in its original packaging.
Return procedure for MAX4237BESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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