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Analog Devices Inc./Maxim Integrated MAX4238AUT#G16
- Part No.:
- MAX4238AUT#G16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4238AUT#G16.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,677
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Product details
Overview
The MAX4238AUT#G16 from Maxim Integrated is a unity-gain stable, ultra-high-precision operational amplifier featuring 0.1µV typical input offset voltage, 10nV/°C drift, 1MHz gain-bandwidth product, rail-to-rail output, and 600µA supply current. It operates from a single 2.7V to 5.5V supply and is specified over the full automotive temperature range (−40°C to +125°C), making it ideal for high-accuracy sensor signal conditioning in electronic scales and medical instrumentation.
For engineers reviewing the MAX4238AUT#G16 datasheet, MAX4238AUT#G16 pinout, MAX4238AUT#G16 application, or MAX4238AUT#G16 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated SOT23-6 pin configuration, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX4238AUT#G16 employs patented autocorrelating zeroing to continuously measure and cancel input offset and 1/f noise-enabling near-zero DC error over time and temperature. Its ground-sensing input architecture supports single-supply operation with common-mode voltage extending to GND − 0.05V.
This amplifier uses BiCMOS process technology (821 transistors) and features an active-low shutdown input that reduces supply current to 0.1µA while placing the output in high-impedance state. It achieves 150dB open-loop gain, 140dB PSRR, and 140dB CMRR at +25°C, with guaranteed performance down to −40°C and up to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 0.1µV typ (2.5µV max over −40°C to +85°C); enables sub-16-bit ADC interface without calibration. |
| Offset Drift | 10nV/°C max; contributes only 100nV error over 10°C ambient shift-critical for thermocouple front-ends. |
| Gain-Bandwidth Product | 1MHz; supports stable unity-gain operation with <1µs settling to 0.0015% for 16-bit precision. |
| Supply Current | 600µA typ at 5.5V; allows battery-powered instrumentation with >1-year runtime on coin cell. |
| Output Swing | Rail-to-rail into 1kΩ load (VOL ≤ 50mV above GND, VOH ≥ VCC − 50mV); maximizes dynamic range with single supply. |
| Input Noise (0.01–10Hz) | 1.5µVP-P; preserves resolution in low-frequency strain gauge and pressure sensor outputs. |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive and industrial control environments. |
Pinout & Package
MAX4238AUT#G16 is housed in a RoHS-compliant, lead-free 6-pin SOT23 package (pkg code U6FH-6), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads and thermal pad exposed on bottom (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output; rail-to-rail capable into 1kΩ; high-impedance during SHDN = low. |
| 2 | GND | Analog ground reference; must be low-impedance connection to minimize noise coupling. |
| 3 | IN+ | Noninverting input; ground-sensing-accepts common-mode voltages down to GND − 0.05V. |
| 4 | IN− | Inverting input; matched to IN+ for optimal CMRR; sensitive to PCB layout parasitics. |
| 5 | SHDN | Active-low shutdown control; logic-low (<0.7V) disables amplifier and reduces ICC to 0.1µA. |
| 6 | VCC | Positive supply input; accepts 2.7V–5.5V; bypass capacitor required at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Autocorrelating Zeroing Architecture | Eliminates 1/f noise and long-term drift-no external calibration needed across lifetime and temperature. |
| Rail-to-Rail Output Stage | Delivers full 0V–VCC swing into 1kΩ, preserving 16-bit ADC effective resolution with single 3.3V supply. |
| Ground-Sensing Input | Accepts input signals referenced to GND (e.g., bridge sensors), enabling true single-supply front-end design. |
| 0.1µA Shutdown Mode | Reduces system standby power by >99.9%-essential for portable medical devices with intermittent measurement cycles. |
| 140dB PSRR / CMRR | Rejects supply ripple and common-mode interference in noisy industrial environments without additional filtering. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltage from K-type thermocouples in HVAC controllers. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset cancellation before 16-bit sigma-delta ADC. Use Value: 0.1µV offset and 10nV/°C drift ensure ±0.1°C accuracy over −20°C to +85°C ambient without software correction. |
Use Scenario: Buffering mV-output Wheatstone bridges in industrial load cells and torque sensors. IC Role / Device Role / Timing Role: Low-noise, high-CMRR instrumentation amplifier front-end with rail-to-rail output drive. Use Value: 1.5µVP-P (0.01–10Hz) noise and 140dB CMRR reject bridge imbalance and EMI, preserving 24-bit resolution. |
| Electronic Scale Front-End | Medical ECG/EEG Analog Front-End |
|
Use Scenario: High-gain amplification of microvolt-level strain gauge outputs in precision bench scales. IC Role / Device Role / Timing Role: First-stage gain block with auto-zeroing to eliminate thermal EMF errors in solder joints and traces. Use Value: Near-zero drift ensures repeatability within 0.001% full scale over 8-hour production runs without recalibration. |
Use Scenario: Low-noise, DC-coupled amplification of biopotential signals in portable patient monitors. IC Role / Device Role / Timing Role: Single-supply, ground-referenced input amplifier driving anti-alias filter and ADC. Use Value: 2.7V–5.5V operation and rail-to-rail output enable compact 3.3V-powered designs with >100dB SNR at 10Hz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4238AUT-T | Same die, non-RoHS SOT23-6 package (U6F-6); no lead exemption marker; identical electrical specs. | Not suitable for RoHS-compliant medical or automotive programs requiring lead-free materials documentation. | Select MAX4238AUT#G16 when lead-free compliance and traceability per JEDEC J-STD-609A Class 2 are mandatory. |
| OPA333AIDBVR | 17µV max offset (vs. 2.5µV), 0.1µV/°C drift (vs. 0.01µV/°C), 350kHz GBW (vs. 1MHz); same SOT23-6 footprint. | Lacks ground-sensing input-requires dual supply or level-shifting for GND-referenced sensors. | Choose OPA333AIDBVR only if cost sensitivity outweighs 16-bit accuracy requirements and single-supply GND sensing is not needed. |
Compared with MAX4238AUT-T, MAX4238AUT#G16 adds RoHS/lead-exempt compliance for regulated markets; compared with OPA333AIDBVR, it delivers 10× lower offset, 10× lower drift, and ground-sensing capability-enabling direct interface to unipolar sensors without external bias networks.
Availability
MAX4238AUT#G16 is available at Aetrix Electronics and suitable for electronic scales, medical instrumentation, and automotive cabin temperature sensing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4238AUT#G16 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The MAX4238 series targets ultra-precision DC signal conditioning-specifically engineered to replace chopper-stabilized amplifiers in space-constrained, single-supply systems where offset, drift, and 1/f noise limit measurement fidelity.
FAQ
What is the maximum operating temperature for the MAX4238AUT#G16?
The MAX4238AUT#G16 is fully specified and tested over −40°C to +125°C, with guaranteed performance including 3.5µV max input offset and 140dB PSRR at the extremes. This makes the MAX4238AUT#G16 suitable for under-dash automotive modules and industrial motor control enclosures where ambient temperatures exceed 100°C.
Does the MAX4238AUT#G16 require external compensation capacitors?
No-the MAX4238AUT#G16 is unity-gain stable and requires no external compensation. Its internal compensation ensures phase margin >60° at unity gain with 100pF load capacitance. External 100nF ceramic bypass capacitor between VCC and GND is mandatory for supply decoupling but not for stability.
Can the MAX4238AUT#G16 drive a 10kΩ load rail-to-rail?
Yes-the MAX4238AUT#G16 delivers rail-to-rail output swing into 10kΩ (VOL ≤ 10mV, VOH ≥ VCC − 10mV). However, for 1kΩ loads, output swing degrades to VOL ≤ 50mV and VOH ≥ VCC − 50mV. Always verify load-dependent headroom in final layout using the Electrical Characteristics table on page 4 of the MAX4238AUT#G16 datasheet.
How does the shutdown mode affect output state in the MAX4238AUT#G16?
When SHDN is pulled low, the MAX4238AUT#G16 disables its internal clock and amplifier core, reducing supply current to 0.1µA and placing the OUT pin in high-impedance state-neither sourcing nor sinking current. This prevents loading of downstream circuitry and eliminates DC path through the amplifier during sleep modes.
Is the MAX4238AUT#G16 pin-compatible with other SOT23-6 op-amps like the OPA333?
Pinout matches standard SOT23-6 op-amp configuration (VCC, IN−, IN+, GND, OUT, SHDN), but functionality differs: SHDN is unique to MAX4238AUT#G16 and absent in OPA333. Direct replacement requires verifying that SHDN is either tied high or accommodated in PCB routing-otherwise, unintended shutdown may occur.
MAX4238AUT#G16 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:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 0.35V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 0.1 µV
- Current - Supply:
- 600µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX4238AUT#G16 FAQ
1.How can I place an order for MAX4238AUT#G16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4238AUT#G16 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 MAX4238AUT#G16 reliable?
The price and inventory of MAX4238AUT#G16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4238AUT#G16 is usually 5 days.
3.What payment methods are accepted for MAX4238AUT#G16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4238AUT#G16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4238AUT#G16?
MAX4238AUT#G16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4238AUT#G16 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 MAX4238AUT#G16?
For technical support, including MAX4238AUT#G16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4238AUT#G16 requirements.
6.How does Aetrix verify that MAX4238AUT#G16 is sourced from the original manufacturer or authorized distributors?
All MAX4238AUT#G16 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 MAX4238AUT#G16 meets industry standards.
7.What is the process for return or replacement of MAX4238AUT#G16?
All MAX4238AUT#G16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4238AUT#G16, 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 MAX4238AUT#G16 part is unused and in its original packaging.
Return procedure for MAX4238AUT#G16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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