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Analog Devices Inc./Maxim Integrated MAX4237BESA+T
- Part No.:
- MAX4237BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4237BESA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,269
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Product details
Overview
The MAX4237BESA+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 or +5V supply operation. It features 50µV max input offset voltage (Grade B, +25°C), 4.5µV/°C max offset drift, 1pA input bias current, 7.5MHz gain-bandwidth product (for closed-loop gain ≥5V/V), and shutdown mode reducing quiescent current to 0.1µA while placing output in high-impedance state.
For engineers reviewing the MAX4237BESA+T datasheet, MAX4237BESA+T pinout, MAX4237BESA+T application, or MAX4237BESA+T equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world sensor interface use cases, and two validated alternative op amps - all grounded in Maxim's official electrical characteristics and ordering documentation.
Technical Context
The MAX4237BESA+T employs a CMOS input stage enabling ultra-low input bias current (1pA) and ground-sensing input common-mode range extending to VEE − 0.15V. Its internal architecture supports stable operation at closed-loop gains ≥5V/V, delivering 7.5MHz GBWP and 1.3V/µs slew rate under +5V supply with 1kΩ load.
It integrates a dedicated SHDN pin (Pin 5 in SO-8) that forces output into high-impedance state and reduces ICC to ≤2µA (typ 0.1µA) in shutdown mode, with 4µs recovery time. Rail-to-rail output swing (within 150mV of rails into 1kΩ) and 102dB CMRR enable precision DC amplification in battery-powered instrumentation and sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - enables stable closed-loop gain ≥5V/V for signal conditioning in piezoelectric or strain gauge interfaces |
| Input Offset Voltage (max, +25°C) | 50µV - Grade B specification ensures predictable DC error in thermocouple or electrochemical sensor amplifiers |
| Offset Voltage Drift (max) | 4.5µV/°C - limits thermal-induced error drift across −40°C to +85°C industrial operating range |
| Input Bias Current (max) | 500pA - preserves signal integrity in high-impedance sensor nodes (e.g., piezoresistive transducers) |
| Quiescent Supply Current (normal mode) | 440µA - supports low-power, always-on instrumentation without compromising AC performance |
| Rail-to-Rail Output Swing | Within 150mV of rails into 1kΩ - maximizes dynamic range in single-supply +3V/+5V systems |
| Shutdown Quiescent Current | 0.1µA - enables microamp-level power gating for duty-cycled sensor acquisition |
Pinout & Package
MAX4237BESA+T is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.27mm pitch). Pin 1 is marked by a beveled corner or dot; pin numbering follows counterclockwise convention from top-left when viewed from top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - rail-to-rail capable, high-impedance during SHDN assertion |
| 2 | VEE | Negative supply pin - connect to GND in single-supply configurations; bypass with 0.1µF capacitor |
| 3 | IN+ | Noninverting input - high-impedance CMOS node; critical for guarding in electrochemical sensor circuits |
| 4 | IN− | Inverting input - matched to IN+ for common-mode rejection; sensitive to PCB leakage paths |
| 5 | SHDN | Active-low shutdown control - logic low (≤0.3×VCC) disables amplifier and forces high-Z output |
| 6 | VCC | Positive supply input - operates from +2.4V to +5.5V; requires local 0.1µF bypass to GND |
| 7, 8 | N.C. | No internal connection - leave unconnected; no routing or grounding required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typical - eliminates voltage error across high-value feedback resistors in integrators and charge amplifiers |
| Ground-sensing input stage | Common-mode range extends to VEE − 0.15V - enables direct interfacing to sensors referenced to system ground |
| Capacitive load drive | Stable with up to 200pF load - supports direct driving of ADC input capacitors or long traces without external isolation |
| Low-frequency noise | 0.2µVP-P (0.1Hz–10Hz) - minimizes drift in DC-coupled strain gauge and thermopile measurement chains |
| High PSRR and CMRR | 95dB min PSRR, 80dB min CMRR over full temp range - rejects supply ripple and common-mode interference in noisy industrial environments |
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 or pressure transducers. IC Role / Device Role / Timing Role: Primary gain-stage amplifier with precision DC coupling and low thermal drift. Use Value: 50µV max VOS and 4.5µV/°C TCVOS ensure <±0.05% FS error over temperature without recalibration. |
Use Scenario: Charge-to-voltage conversion for piezoelectric accelerometers or acoustic emission sensors. IC Role / Device Role / Timing Role: Low-bias-current, high-input-impedance transimpedance amplifier front-end. Use Value: 1pA IB allows use of minimal feedback capacitance, preserving signal bandwidth and SNR. |
| Thermocouple Amplifier | Battery-Powered Instrumentation |
|
Use Scenario: Cold-junction compensation and linearization of K-type or J-type thermocouple outputs. IC Role / Device Role / Timing Role: Precision DC amplifier with rail-to-rail output driving ADC reference or buffer stage. Use Value: Rail-to-rail swing into 1kΩ and 102dB CMRR reject thermocouple lead noise and improve resolution at sub-mV levels. |
Use Scenario: Portable multimeters, handheld gas detectors, or wireless sensor nodes requiring long battery life. IC Role / Device Role / Timing Role: Signal-conditioning amplifier with shutdown control synchronized to measurement cycles. Use Value: 0.1µA shutdown current extends shelf life and runtime; 440µA active ICC enables continuous monitoring at µA-scale power budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-input-bias-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | 2µV max VOS (Grade A), 0.1µV/°C drift, 200pA IB, 350kHz GBWP, no shutdown | Better DC precision but lower bandwidth; unsuitable for >10kHz sensor signals or shutdown-controlled systems | Select when ultra-low offset drift dominates over speed and power gating requirements |
| LTC2050CS8#PBF | 5µV max VOS, 0.05µV/°C drift, 30pA IB, 3MHz GBWP, shutdown available | Lower drift and higher speed than MAX4237BESA+T, but higher 1.1mA ICC and SO-8 footprint mismatch (different pinout) | Choose when sub-µV/°C stability is mandatory and layout allows rework for different pin assignment |
Compared with OPA333AIDR and LTC2050CS8#PBF, the MAX4237BESA+T provides optimal balance of 7.5MHz bandwidth, 50µV offset, 1pA bias current, and integrated shutdown - making it uniquely suited for battery-powered, medium-speed precision sensor interfaces where layout reuse and power-state control are critical.
Availability
MAX4237BESA+T is available at Aetrix Electronics and suitable for strain gauge amplifiers, piezoelectric sensor interfaces, and thermocouple signal conditioners requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4237BESA+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 specifically for high-accuracy, low-power sensor signal conditioning - emphasizing ultra-low input bias current, rail-to-rail output, and robust single-supply operation in compact packages.
FAQ
What is the maximum input offset voltage specification for MAX4237BESA+T at +25°C?
The MAX4237BESA+T has a guaranteed maximum input offset voltage of 50µV at +25°C (Grade B specification per Maxim's datasheet, page 2, Electrical Characteristics table for SO-8/µMAX). 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.
Does MAX4237BESA+T support single-supply operation, and what is its minimum supply voltage?
Yes, MAX4237BESA+T supports true single-supply operation from +2.4V to +5.5V. Its input common-mode range extends to VEE − 0.15V (i.e., −0.15V when VEE = GND), and output swings rail-to-rail - enabling full utilization of the supply range in +3V or +5V systems without dual supplies.
What is the function of Pin 5 (SHDN) on MAX4237BESA+T, and how is it controlled?
Pin 5 (SHDN) is an active-low shutdown input. When pulled to VEE (GND), MAX4237BESA+T enters shutdown mode: quiescent current drops to ≤2µA (typ 0.1µA), and the output enters high-impedance state. To enable normal operation, SHDN must be tied to VCC. Logic thresholds are defined as VIL ≤ 0.3×VCC and VIH ≥ 0.7×VCC.
Can MAX4237BESA+T drive a 1000pF capacitive load stably?
No - MAX4237BESA+T is characterized for stable operation with up to 200pF capacitive load (per datasheet page 4, "Capacitive Load Stability"). Driving 1000pF risks peaking or oscillation. For heavier loads, add a series resistor (e.g., 50Ω) between output and capacitance, or use a unity-gain stable buffer like MAX4236BESA+T if gain ≥5V/V is not required.
What package type and pin count does MAX4237BESA+T use?
MAX4237BESA+T uses an 8-pin SO (Small Outline) package compliant with JEDEC MS-012AC outline (5.0mm × 6.2mm body, 1.27mm lead pitch). It is distinct from the SOT23-6 variant (e.g., MAX4237EUT-T) and shares pinout compatibility with other SO-8 variants in the MAX4236/MAX4237 family, including N.C. pins at positions 1 and 5.
MAX4237BESA+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
MAX4237BESA+T FAQ
1.How can I place an order for MAX4237BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237BESA+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 MAX4237BESA+T reliable?
The price and inventory of MAX4237BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237BESA+T is usually 5 days.
3.What payment methods are accepted for MAX4237BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237BESA+T?
MAX4237BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237BESA+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 MAX4237BESA+T?
For technical support, including MAX4237BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237BESA+T requirements.
6.How does Aetrix verify that MAX4237BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4237BESA+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 MAX4237BESA+T meets industry standards.
7.What is the process for return or replacement of MAX4237BESA+T?
All MAX4237BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237BESA+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 MAX4237BESA+T part is unused and in its original packaging.
Return procedure for MAX4237BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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