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Analog Devices Inc./Maxim Integrated MAX4237AEUA
- Part No.:
- MAX4237AEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4237AEUA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:5,567
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Product details
Overview
The MAX4237AEUA from Maxim Integrated is a high-precision, rail-to-rail output operational amplifier optimized for low-voltage, low-power instrumentation applications. It features 20µV max input offset voltage (Grade A), 2µV/°C max offset drift, 1pA input bias current, 7.5MHz gain-bandwidth product (for closed-loop gain ≥5V/V), and shutdown mode drawing <0.1µA. It operates from +2.4V to +5.5V single supply and is used in thermocouple amplifiers and electrochemical sensor front-ends.
For engineers reviewing the MAX4237AEUA datasheet, MAX4237AEUA pinout, MAX4237AEUA application, or MAX4237AEUA equivalent, key selection criteria include guaranteed Grade A offset performance at +25°C and over temperature, stable operation at AV ≥5V/V, rail-to-rail output swing into 1kΩ, ground-sensing input common-mode range, and µMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4237AEUA employs a CMOS input stage enabling ultra-low input bias current (1pA) and high input resistance (>1000MΩ), critical for piezoelectric and electrochemical sensor interfaces where leakage must be minimized. Its architecture supports stable closed-loop gains ≥5V/V without external compensation, delivering 7.5MHz GBWP and 1.3V/µs slew rate under +5V supply.
It integrates a dedicated SHDN pin that forces output into high-impedance state and reduces quiescent current to <0.1µA - essential for battery-powered instrumentation requiring intermittent operation. Input common-mode range extends to VEE − 0.15V, enabling true ground-sensing capability in single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 20µV at +25°C (Grade A): ensures minimal DC error in precision gain stages and sensor signal conditioning. |
| Offset Drift (max) | 2µV/°C: maintains accuracy across industrial temperature range (−40°C to +85°C) without recalibration. |
| Gain-Bandwidth Product | 7.5MHz at AV ≥5V/V: enables stable high-speed amplification of low-noise sensor signals with minimal phase margin loss. |
| Input Bias Current | 1pA typical: prevents signal degradation in high-impedance transducer interfaces (e.g., piezoelectric sensors). |
| Rail-to-Rail Output Swing | Within 150mV of rails into 1kΩ: maximizes dynamic range in +3V/+5V systems, improving ADC utilization. |
| Shutdown Quiescent Current | <0.1µA: extends battery life in portable instrumentation by disabling amplifier while preserving high-Z output. |
| Supply Voltage Range | +2.4V to +5.5V single supply: supports direct integration with Li-ion, coin-cell, and regulated 3.3V/5V rails. |
Pinout & Package
The MAX4237AEUA is housed in an 8-pin µMAX package (pin-compatible with SO-8), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. Bypassing VCC and VEE with 0.1µF capacitors near the pins is required for stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail voltage swing; high-impedance during shutdown when SHDN = low. |
| 2 (VEE) | Negative Power Supply | Connect to GND in single-supply operation; requires local 0.1µF bypass to ground. |
| 3 (IN+) | Noninverting Input | High-impedance CMOS node; accepts input down to VEE − 0.15V for ground-referenced sensing. |
| 4 (IN−) | Inverting Input | Matches IN+ in bias current and offset; used for feedback network connection in standard configurations. |
| 5 (N.C.) | No Connection | Not internally bonded; leave unconnected per datasheet - no routing or grounding required. |
| 6 (SHDN) | Shutdown Control Input | Active-low logic: ≤0.3×VCC disables amplifier; ≥0.7×VCC enables normal operation (1–3µA input current). |
| 7 (VCC) | Positive Supply Input | Accepts +2.4V to +5.5V; requires local 0.1µF bypass capacitor to minimize supply noise coupling. |
| 8 (N.C.) | No Connection | Not internally bonded; electrically isolated - must remain floating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset voltage grade | 20µV max at +25°C (A-grade): eliminates need for manual nulling in strain gauge and thermocouple circuits. |
| Ground-sensing input stage | Common-mode range includes VEE − 0.15V: enables direct interface to 0V-referenced sensors without level-shifting circuitry. |
| Capacitive load drive | Stable with up to 200pF load: supports direct driving of ADC input capacitors or long traces without isolation resistors. |
| Low-frequency noise | 0.2µVp-p (0.1Hz–10Hz): preserves signal integrity in slow-response electrochemical and pH sensor measurements. |
| CMRR and PSRR | 102dB CMRR / 120dB PSRR (typ): rejects power 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 and pressure transducers. IC Role / Device Role / Timing Role: Precision noninverting amplifier with fixed gain ≥5V/V, leveraging MAX4237AEUA's low drift and high CMRR to reject bridge excitation noise. Use Value: 20µV offset and 2µV/°C drift ensure measurement stability over temperature; rail-to-rail output fully utilizes 16-bit ADC input range. |
Use Scenario: Charge-to-voltage conversion for high-impedance piezoelectric accelerometers and acoustic emission sensors. IC Role / Device Role / Timing Role: Ultra-low-bias-current transimpedance amplifier with integrator topology, minimizing capacitance-dependent signal decay. Use Value: 1pA input bias current allows use of minimal feedback capacitance, preserving bandwidth and SNR in vibration monitoring systems. |
| Thermocouple Amplifier Front-End | Electrochemical Sensor Readout |
Use Scenario: Cold-junction compensation and linear amplification of µV-level thermocouple outputs (e.g., Type K, J) in industrial temperature controllers. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier input stage, often paired with reference junction sensor and digital correction. Use Value: 14nV/√Hz input voltage noise and 0.2µVp-p low-frequency noise prevent thermal EMF resolution loss in sub-0.1°C measurement systems. |
Use Scenario: Amperometric detection of analyte concentration in glucose meters, gas sensors, and environmental monitors using working electrode current. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA–nA currents into measurable voltage, operating in low-power shutdown between sampling intervals. Use Value: Shutdown current <0.1µA extends coin-cell lifetime; 1pA bias current avoids baseline shift in low-current biosensor applications. |
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 | Zero-drift chopper architecture; 10µV max offset, 0.1µV/°C drift; higher 350kHz GBWP but limited to AV ≥1V/V. | Better drift performance but unsuitable for stable AV ≥5V/V configurations; higher 1.6µA quiescent current vs. 350µA normal / 0.1µA shutdown. | Select OPA333AIDBVR only if ultra-low drift dominates over gain stability and shutdown current requirements. |
| LTC2050CS5#TRMPBF | Zero-drift design; 5µV max offset, 0.05µV/°C drift; unity-gain stable; 1.5MHz GBWP; no shutdown pin. | Lacks integrated shutdown function; requires external enable circuitry; larger SOT23-5 footprint vs. µMAX-8; no rail-to-rail output swing spec. | Choose LTC2050CS5#TRMPBF when absolute lowest offset/drift is mandatory and shutdown functionality can be implemented externally. |
Compared with OPA333AIDBVR and LTC2050CS5#TRMPBF, the MAX4237AEUA uniquely combines guaranteed Grade A offset performance, stable operation at AV ≥5V/V, integrated shutdown with high-Z output, and rail-to-rail swing - making it optimal for battery-powered, high-gain sensor signal chains where layout area and power sequencing matter.
Availability
MAX4237AEUA is available at Aetrix Electronics and suitable for strain gauge instrumentation, piezoelectric sensor interfaces, and thermocouple amplifier designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4237AEUA 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 are critical system constraints.
FAQ
What is the maximum guaranteed input offset voltage for MAX4237AEUA at +25°C?
The MAX4237AEUA is Grade A qualified, with a maximum input offset voltage of 20µV at +25°C, tested and guaranteed across all production units in the µMAX-8 package. This specification is explicitly confirmed in the Electrical Characteristics table for SO-8 and µMAX-8 packages, and applies directly to the MAX4237AEUA ordering option.
Does MAX4237AEUA support unity-gain stable operation?
No, the MAX4237AEUA is not unity-gain stable. It is specified for stable closed-loop operation only at gains ≥5V/V, with a 7.5MHz gain-bandwidth product under that condition. For unity-gain applications, the MAX4236 variant (1.7MHz GBWP, unity-gain stable) should be selected instead - the MAX4237AEUA will oscillate if configured for AV = 1V/V.
What is the shutdown behavior of MAX4237AEUA, and how fast does it recover?
When the SHDN pin is pulled low (≤0.3×VCC), the MAX4237AEUA reduces quiescent current to <0.1µA and places the output in a high-impedance state. Recovery to full operation takes 4µs (typical) with RL = 1kΩ, as measured from SHDN rising edge to output settling within final value. The shutdown delay time is 1µs (typical).
Can MAX4237AEUA operate from a +3.3V single supply?
Yes, the MAX4237AEUA is fully specified for operation from +2.4V to +5.5V single supply. At +3.3V, it maintains all key performance parameters including 20µV max offset (Grade A), 2µV/°C max drift, rail-to-rail output swing (within 150mV of rails into 1kΩ), and 7.5MHz GBWP at AV ≥5V/V - making it ideal for modern 3.3V embedded systems.
Is the µMAX-8 package of MAX4237AEUA pin-compatible with SO-8?
Yes, the MAX4237AEUA in µMAX-8 shares identical pin numbering and function mapping with the SO-8 version (MAX4237AESA). Pin 1 = OUT, Pin 2 = VEE, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = N.C., Pin 6 = SHDN, Pin 7 = VCC, Pin 8 = N.C. Layouts designed for SO-8 can accommodate µMAX-8 with footprint adaptation but no signal re-routing.
MAX4237AEUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-uMAX/uSOP
MAX4237AEUA FAQ
1.How can I place an order for MAX4237AEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237AEUA 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 MAX4237AEUA reliable?
The price and inventory of MAX4237AEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237AEUA is usually 5 days.
3.What payment methods are accepted for MAX4237AEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237AEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237AEUA?
MAX4237AEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237AEUA 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 MAX4237AEUA?
For technical support, including MAX4237AEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237AEUA requirements.
6.How does Aetrix verify that MAX4237AEUA is sourced from the original manufacturer or authorized distributors?
All MAX4237AEUA 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 MAX4237AEUA meets industry standards.
7.What is the process for return or replacement of MAX4237AEUA?
All MAX4237AEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237AEUA, 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 MAX4237AEUA part is unused and in its original packaging.
Return procedure for MAX4237AEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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