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Analog Devices Inc./Maxim Integrated MAX4237EUT+T
- Part No.:
- MAX4237EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4237EUT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
The MAX4237EUT+T from Maxim Integrated is a high-precision, rail-to-rail output operational amplifier optimized for single-supply +3V/+5V systems with closed-loop gain ≥5V/V. It delivers 7.5MHz gain-bandwidth, 1.3V/µs slew rate, ultra-low 1pA input bias current, and 200pF capacitive load stability. Its ground-sensing input and shutdown mode (0.1µA quiescent current) make it ideal for battery-powered instrumentation and sensor front-ends.
For engineers reviewing the MAX4237EUT+T datasheet, MAX4237EUT+T pinout, MAX4237EUT+T application, or MAX4237EUT+T equivalent, this page provides verified specifications, SOT23-6 package details, real-world use cases in electrochemical and piezoelectric sensing, and validated alternative options for precision op amp selection.
Technical Context
The MAX4237EUT+T uses a CMOS input stage enabling 1pA input bias current and rail-to-rail output swing within 150mV of rails into 1kΩ. Its internal architecture supports stable operation at closed-loop gains ≥5V/V without external compensation, unlike the unity-gain-stable MAX4236 variant.
It features a shutdown function controlled by the SHDN pin (logic low disables amplifier, places output in high-impedance state), with 4µs recovery time and 1µs shutdown delay. Input common-mode range extends to VEE − 0.15V, enabling true ground-sensing capability in single-supply configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - enables stable amplification of signals up to ~1.5MHz at gain=5, suitable for fast sensor signal conditioning |
| Input Bias Current | 1pA (max) - preserves signal integrity in high-impedance sensor interfaces like piezoelectric transducers |
| Offset Voltage (Grade B) | 50µV (max) at +25°C - ensures minimal DC error in precision DC-coupled measurement paths |
| Offset Drift | 5.5µV/°C (max) - maintains accuracy across industrial temperature range (−40°C to +85°C) |
| Quiescent Current | 350µA (normal mode), 0.1µA (shutdown) - supports ultra-low-power operation in portable instrumentation |
| Rail-to-Rail Output | Swings to within 150mV of VCC/VEE into 1kΩ - maximizes dynamic range on +3V/+5V supplies |
| Capacitive Load Drive | 200pF - allows direct driving of ADC input capacitors or long PCB traces without instability |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, JEDEC MO-178 compatible. Requires 0.1µF bypass capacitor on VCC and VEE pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail voltage swing; high-impedance during shutdown |
| 2 (VEE) | Negative Supply / Ground Reference | Supports single-supply operation when tied to GND; input common-mode extends below this rail |
| 3 (IN+) | Noninverting Input | High-impedance CMOS node; accepts signals down to VEE − 0.15V |
| 4 (IN−) | Inverting Input | High-impedance CMOS node; matched to IN+ for low offset and drift |
| 5 (SHDN) | Shutdown Control Input | Active-low logic: VIL ≤ 0.3×VCC disables amplifier; VIH ≥ 0.7×VCC enables |
| 6 (VCC) | Positive Supply Input | Operates from +2.4V to +5.5V; bypassing mandatory for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA max - eliminates leakage-induced errors in high-Z sensor nodes and integrators |
| Ground-sensing input stage | VCM extends to VEE − 0.15V - enables direct interface to 0V-referenced transducers without level-shifting |
| Stable at gain ≥5V/V | No external compensation required - simplifies design vs. unity-gain-stable alternatives |
| Low-noise performance | 14nV/√Hz @ 1kHz, 0.2µVp-p (0.1–10Hz) - preserves SNR in microvolt-level sensor outputs |
| Fast shutdown recovery | 4µs enable time - supports duty-cycled power management in portable devices |
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 gain-stage amplifier with precision DC coupling and low thermal drift. Use Value: 50µV max offset and 5.5µV/°C drift minimize zero-point drift over temperature; rail-to-rail output fully utilizes 12-bit+ ADC input range on +3V supply. |
Use Scenario: Charge-to-voltage conversion and amplification of high-impedance piezoelectric transducer outputs in vibration and impact sensors. IC Role / Device Role / Timing Role: Low-bias-current, low-noise transimpedance amplifier front-end. Use Value: 1pA input bias prevents charge leakage; 14nV/√Hz noise floor preserves weak transient signals; shutdown mode reduces system standby power. |
| 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 capacitance (7.5pF). Use Value: Ultra-low input bias avoids baseline shift; 200pF capacitive load drive accommodates electrode cable capacitance; shutdown cuts quiescent current to 0.1µA between measurements. |
Use Scenario: Precision analog signal chain in handheld multimeters, portable gas detectors, or field-deployable environmental monitors. IC Role / Device Role / Timing Role: General-purpose precision op amp for filtering, buffering, and level-shifting in low-power mixed-signal systems. Use Value: 350µA supply current extends battery life; +2.4V to +5.5V operation supports Li-ion, coin-cell, or alkaline sources; SOT23-6 footprint minimizes PCB area. |
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 | Unity-gain stable (1.6MHz GBW), 0.1µV/°C max drift, 25µV max offset (A-grade), no shutdown pin | Lacks shutdown function; better drift spec but lower bandwidth limits AC response | Choose when lowest drift is critical and shutdown is unnecessary |
| ADA4522-1ARMZ | Zero-drift architecture (0.005µV/°C), 3MHz GBW, 1.8V to 5.5V supply, no shutdown | Superior DC accuracy but lower bandwidth and no power-down capability | Prefer for ultra-stable DC measurements where 7.5MHz bandwidth is excessive |
Compared with OPA333AIDBVR and ADA4522-1ARMZ, the MAX4237EUT+T uniquely combines 7.5MHz bandwidth, shutdown functionality, and SOT23-6 packaging-making it optimal for battery-powered, medium-speed precision sensing where power gating and space constraints matter.
Availability
MAX4237EUT+T is available at Aetrix Electronics and suitable for strain gauge signal conditioning, piezoelectric sensor interfaces, and electrochemical sensor front-ends requiring stable component supply across industrial temperature ranges.
Supply support for MAX4237EUT+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 demanding industrial, medical, and communications applications.
The MAX4236/MAX4237 family targets high-accuracy, low-power sensor signal conditioning-specifically engineered for ground-sensing, rail-to-rail operation on +3V/+5V supplies with minimal offset and drift.
FAQ
What is the maximum stable closed-loop gain for the MAX4237EUT+T?
The MAX4237EUT+T is specified for stable operation at closed-loop gains greater than 5V/V. Unlike the MAX4236EUT+T, it is not unity-gain stable and requires minimum gain ≥5 to ensure phase margin and prevent oscillation. This is confirmed in the Ordering Information table and Electrical Characteristics section of the datasheet.
Does the MAX4237EUT+T support single-supply operation?
Yes, the MAX4237EUT+T operates from a single +2.4V to +5.5V supply. Its input common-mode range extends to VEE − 0.15V (enabling ground-sensing), and its rail-to-rail output swings within 150mV of both rails into a 1kΩ load-making it ideal for +3V and +5V single-supply systems.
What is the purpose of the SHDN pin on the MAX4237EUT+T?
The SHDN pin on the MAX4237EUT+T is an active-low shutdown control. When pulled to VEE (GND), it reduces quiescent current to less than 0.1µA and places the output in a high-impedance state. Pulling SHDN to VCC enables normal operation. The shutdown recovery time is 4µs, and shutdown delay is 1µs.
Is the MAX4237EUT+T pin-compatible with other op amps in the same package?
No, the MAX4237EUT+T has a proprietary SOT23-6 pinout (OUT, VEE, IN+, IN−, SHDN, VCC) that differs from standard op amp pinouts like the LMV321 or OPA333. Direct replacement requires PCB layout modification. Always verify pin functions using the official MAX4237EUT+T datasheet before substitution.
What grade is the MAX4237EUT+T, and how does it affect specifications?
The MAX4237EUT+T is a Grade B device, meaning its input offset voltage is guaranteed ≤50µV at +25°C and ≤600µV over −40°C to +85°C, with offset drift ≤5.5µV/°C. Grade A versions (e.g., MAX4237AEUA) offer tighter specs (20µV max offset, 2µV/°C drift) but are only available in µMAX and SO packages-not SOT23-6.
MAX4237EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- 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:
- SOT-6
MAX4237EUT+T FAQ
1.How can I place an order for MAX4237EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237EUT+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 MAX4237EUT+T reliable?
The price and inventory of MAX4237EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237EUT+T is usually 5 days.
3.What payment methods are accepted for MAX4237EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237EUT+T?
MAX4237EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237EUT+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 MAX4237EUT+T?
For technical support, including MAX4237EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237EUT+T requirements.
6.How does Aetrix verify that MAX4237EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4237EUT+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 MAX4237EUT+T meets industry standards.
7.What is the process for return or replacement of MAX4237EUT+T?
All MAX4237EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237EUT+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 MAX4237EUT+T part is unused and in its original packaging.
Return procedure for MAX4237EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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