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Analog Devices Inc./Maxim Integrated MAX4237EUT
- Part No.:
- MAX4237EUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4237EUT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
The MAX4237EUT 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 7.5MHz gain-bandwidth product (AV ≥ 5V/V), 1pA input bias current, 200µV max input offset voltage (SOT23-6, Grade B), and shutdown mode reducing quiescent current to 0.1µA - ideal for battery-powered electrochemical sensor front-ends and thermocouple amplifiers.
For engineers reviewing the MAX4237EUT datasheet, MAX4237EUT pinout, MAX4237EUT application, or MAX4237EUT equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, real-world use cases in precision analog sensing, and validated alternative op amps with documented functional trade-offs.
Technical Context
The MAX4237EUT employs a CMOS input stage enabling ultra-low 1pA input bias current and 7.5MHz GBWP at minimum closed-loop gain of 5V/V. Its input common-mode range extends to VEE − 0.15V, supporting ground-sensing operation, while rail-to-rail output swing delivers ±150mV headroom into 1kΩ load at VCC = +5V.
Shutdown control via SHDN pin forces output into high-impedance state with 4µs recovery time and 1µs shutdown delay. The device is specified across −40°C to +85°C and tested per A/B grade limits for offset voltage (20µV/50µV max) and drift (2µV/°C or 4.5µV/°C max) in SOT23-6 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5MHz - supports stable closed-loop gain ≥5V/V with sufficient phase margin for sensor signal conditioning. |
| Input Bias Current | 1pA (typ) - enables high-impedance piezoelectric and electrochemical sensor interfacing without signal degradation. |
| Input Offset Voltage | 50µV (max, Grade B, +25°C) - ensures <0.1% error in 50mV full-scale strain gauge outputs. |
| Offset Voltage Drift | 4.5µV/°C (max, Grade B) - limits thermal-induced error to <0.45mV over 100°C industrial temperature span. |
| Rail-to-Rail Output Swing | Within 150mV of rails into 1kΩ - maximizes dynamic range in +3V single-supply instrumentation. |
| Quiescent Current | 350µA (normal mode), 0.1µA (shutdown) - extends battery life in portable sensor nodes with periodic wake-up. |
| Capacitive Load Drive | 200pF - allows direct connection to ADC input capacitors or long PCB traces without oscillation. |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, JEDEC MO-178AA compliant. Requires 0.1µF ceramic bypass capacitor on VCC and VEE pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | High-impedance during shutdown; drives 1kΩ load to within 150mV of supply rails. |
| 2 (VEE) | Negative Supply / Ground Reference | Accepts 0V in single-supply mode; input common-mode extends to VEE − 0.15V. |
| 3 (IN+) | Noninverting Input | CMOS input with 1pA bias current; connects directly to high-Z sensor sources. |
| 4 (IN−) | Inverting Input | Used for feedback network attachment; matched to IN+ for optimal CMRR. |
| 5 (SHDN) | Shutdown Control Input | Logic-compatible (VIH = 0.7×VCC); must not float - tie to VCC for active operation. |
| 6 (VCC) | Positive Supply Input | Operates from +2.4V to +5.5V; bypassing critical for noise-sensitive precision applications. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA enables >100GΩ source impedance interfacing without measurable DC error. |
| Ground-sensing input stage | Common-mode range includes VEE − 0.15V, allowing direct connection to 0V-referenced transducers. |
| Shutdown mode with Hi-Z output | Reduces system power to 0.1µA while isolating downstream circuitry from amplifier output. |
| Low-frequency noise performance | 0.2µVp-p (0.1Hz–10Hz) minimizes drift in DC-coupled integrators and thermocouple amplifiers. |
| High PSRR and CMRR | 95dB PSRR and 80dB CMRR (min, over temp) reject supply and common-mode interference in noisy 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 sensors. IC Role / Device Role / Timing Role: Precision noninverting amplifier with fixed gain ≥5V/V, leveraging MAX4237EUT's low offset drift and rail-to-rail output to maximize SNR. Use Value: 4.5µV/°C max TCVOS ensures <0.45mV error over full industrial temperature range, preserving calibration integrity. |
Use Scenario: Charge-to-voltage conversion for high-impedance piezoelectric accelerometers and acoustic sensors. IC Role / Device Role / Timing Role: Low-bias-current transimpedance amplifier with feedback capacitor; uses MAX4237EUT's 1pA IB to minimize leakage-induced baseline shift. Use Value: Enables sub-1pF feedback capacitance selection, improving low-frequency response and reducing noise gain. |
| Thermocouple Amplifier Front-End | Battery-Powered Electrochemical Sensor |
Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in portable test equipment. IC Role / Device Role / Timing Role: High-accuracy instrumentation amplifier input stage; exploits MAX4237EUT's 50µV max VOS and 7.5MHz GBWP for fast settling. Use Value: 350µA quiescent current enables >1-year battery life in AA-powered handheld meters with 10s measurement intervals. |
Use Scenario: Amperometric detection of glucose or dissolved oxygen using enzyme-based electrodes. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level electrode current to measurable voltage; relies on MAX4237EUT's ultra-low input current and noise. Use Value: 0.2µVp-p low-frequency noise ensures resolution of <10pA current steps in medical-grade analyzers. |
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 | 17µV max VOS (A-grade), 350kHz GBWP, no shutdown, SC70-5 package | Lacks shutdown and higher GBWP; better for ultra-low-offset DC apps where speed is secondary | Select when absolute lowest offset (<17µV) is required and shutdown is unnecessary. |
| ADA4522-1ARMZ | 2.5µV max VOS (A-grade), zero-drift architecture, 3MHz GBWP, SOIC-8 only | Zero-drift eliminates 1/f noise and long-term drift but adds switching artifacts; incompatible SOT23 footprint | Choose for microvolt-level stability over time/temperature where layout space permits SOIC-8. |
Compared with OPA333AIDBVR and ADA4522-1ARMZ, the MAX4237EUT uniquely balances 7.5MHz bandwidth, 1pA input bias, integrated shutdown, and SOT23-6 size - making it optimal for space-constrained, battery-operated precision sensor nodes requiring both speed and ultra-low input current.
Availability
MAX4237EUT is available at Aetrix Electronics and suitable for strain gauge signal conditioning, piezoelectric sensor interfaces, and battery-powered electrochemical sensor designs requiring stable component supply across industrial temperature ranges.
Supply support for MAX4237EUT 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 for ultra-precision DC-coupled signal chains in low-power, single-supply instrumentation - targeting applications where chopper-stabilized noise or drift would compromise accuracy.
FAQ
What is the maximum stable closed-loop gain for MAX4237EUT?
The MAX4237EUT is internally compensated for stable operation at closed-loop gains ≥5V/V. Unlike the unity-gain-stable MAX4236EUT, it achieves 7.5MHz gain-bandwidth product only when configured with gain ≥5. Using it at lower gains risks instability and peaking in frequency response. Always verify phase margin in final layout with 200pF capacitive load.
Does MAX4237EUT support true single-supply operation down to +2.4V?
Yes, MAX4237EUT operates from +2.4V to +5.5V single supply, with input common-mode range extending to VEE − 0.15V (i.e., −0.15V when VEE = 0V) and rail-to-rail output swing. At +2.4V supply, output still swings within 150mV of rails into 1kΩ, enabling full-scale signal utilization in low-voltage portable systems.
How does the shutdown function affect output state in MAX4237EUT?
When SHDN is pulled low, MAX4237EUT disables its internal circuitry, reducing quiescent current to 0.1µA and placing the OUT pin in a high-impedance state - electrically disconnecting it from downstream circuitry. This prevents loading or back-driving of connected stages, unlike op amps that force output to a rail or undefined voltage during shutdown.
What is the guaranteed input offset voltage specification for MAX4237EUT?
The MAX4237EUT (SOT23-6 package, unspecified grade) has a maximum input offset voltage of 600µV over the full −40°C to +85°C temperature range. At +25°C, the limit is 50µV for Grade B and 20µV for Grade A versions. The MAX4237EUT part number corresponds to Grade B in SOT23-6, so 50µV max at +25°C applies unless otherwise marked.
Can MAX4237EUT drive heavy capacitive loads without oscillation?
Yes, MAX4237EUT is characterized for stable operation with up to 200pF capacitive load at the output, per manufacturer testing. This allows direct connection to sampling ADC inputs, long PCB traces, or EMI filtering networks without external isolation resistors. For loads >200pF, add a series resistor (e.g., 10–50Ω) between OUT and the capacitor to maintain phase margin.
MAX4237EUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- 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:
- SOT-23-6
MAX4237EUT FAQ
1.How can I place an order for MAX4237EUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4237EUT 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 reliable?
The price and inventory of MAX4237EUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4237EUT is usually 5 days.
3.What payment methods are accepted for MAX4237EUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4237EUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4237EUT?
MAX4237EUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4237EUT 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?
For technical support, including MAX4237EUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4237EUT requirements.
6.How does Aetrix verify that MAX4237EUT is sourced from the original manufacturer or authorized distributors?
All MAX4237EUT 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 meets industry standards.
7.What is the process for return or replacement of MAX4237EUT?
All MAX4237EUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4237EUT, 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 part is unused and in its original packaging.
Return procedure for MAX4237EUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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