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Analog Devices Inc./Maxim Integrated MAX4239AUT/V+T
- Part No.:
- MAX4239AUT/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4239AUT/V+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,638
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Product details
Overview
MAX4239AUT/V+T from Maxim Integrated is a decompensated, ultra-high-precision operational amplifier optimized for high-resolution sensor signal conditioning. It delivers 6.5MHz gain-bandwidth product, 10V/V minimum stable gain, 0.1µV typical input offset voltage, and rail-to-rail output swing on a single 2.7V–5.5V supply - enabling accurate front-end amplification in automotive-grade electronic scales and thermocouple interfaces.
For engineers reviewing the MAX4239AUT/V+T datasheet, MAX4239AUT/V+T pinout, MAX4239AUT/V+T application, or MAX4239AUT/V+T equivalent, key selection criteria include its AEC-Q100 qualification, 10nV/°C max offset drift over –40°C to +125°C, 1.5µVP-P (0.01Hz–10Hz) input noise, shutdown current of 0.1µA, and SOT23-6 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The MAX4239AUT/V+T employs patented autocorrelating zeroing architecture that continuously samples and cancels input offset and 1/f noise, eliminating drift over time and temperature. Its decompensated design requires closed-loop gain ≥10V/V for stability and achieves 6.5MHz GBWP with 1.6V/µs slew rate at 5V supply.
This amplifier features ground-sensing inputs, rail-to-rail output driving capability into 1kΩ loads, and an active-low shutdown pin (SHDN) that places the output in high-impedance state while reducing supply current to 0.1µA - supporting low-power wake-up architectures in battery-backed automotive instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - enables stable amplification up to 100kHz at AV = 65, suitable for anti-aliasing filtering before 16-bit ADCs |
| Input Offset Voltage (max) | 3.5µV over –40°C to +125°C - ensures ≤0.002% full-scale error in 16-bit systems with ±10mV input range |
| Offset Drift (max) | 10nV/°C - contributes only 100nV error across 10°C ambient shift, critical for uncalibrated automotive cabin sensors |
| Input Noise (0.01Hz–10Hz) | 1.5µVP-P - preserves resolution in DC-coupled strain gauge bridges where sub-microvolt signals dominate |
| Supply Current (active) | 600µA - allows continuous operation in always-on vehicle subsystems without exceeding 100µW per channel budget |
| Shutdown Current | 0.1µA - supports >10-year battery life in parked-mode tire pressure monitoring or seat occupancy detection |
| Minimum Stable Gain | 10V/V - mandates external gain-setting network design with RF/RIN ≥ 9, preventing oscillation in precision transducer interfaces |
Pinout & Package
MAX4239AUT/V+T is supplied in a RoHS-compliant, lead(Pb)-free 6-pin SOT23 package (package code U6FH+6), with exposed pad not present. Thermal resistance θJA is 134.4°C/W on multilayer board, supporting operation up to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Rail-to-rail voltage source capable of sourcing/sinking 40mA; connects directly to ADC input or next-stage filter |
| 2 (GND) | Analog Ground Reference | Primary return path for input bias currents and output load; must be tied to clean analog ground plane |
| 3 (IN+) | Noninverting Input | High-impedance CMOS node (1pA bias); accepts differential or single-ended sensor signals with ground-sensing capability |
| 4 (IN−) | Inverting Input | Matches IN+ in impedance and leakage; used with feedback network to set closed-loop gain ≥10V/V |
| 5 (SHDN) | Active-Low Shutdown Control | Logic input requiring <0.7V for shutdown; pulls output to high-Z and halts internal zeroing clock to minimize current |
| 6 (VCC) | Positive Supply Rail | Accepts 2.7V–5.5V; powers internal autozero circuitry and output stage; bypass capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified (Grade 1) | Validated for automotive applications from –40°C to +125°C ambient, including engine bay and passenger cabin environments |
| Autocorrelating zeroing architecture | Eliminates 1/f noise and long-term drift by dynamically canceling input offset every 10–15kHz, without chopper-induced intermodulation |
| Rail-to-rail output (1kΩ load) | Swings within 35mV of rails at VCC = 5V, maximizing dynamic range into successive approximation register (SAR) ADCs |
| Ground-sensing input common-mode range | Operates with inputs down to –0.05V (below GND), enabling direct connection to bridge sensors referenced to system ground |
| Low 0.1µA shutdown current | Reduces quiescent power to negligible levels during sleep modes, meeting ISO 16750-2 parasitic drain requirements |
Applications
| Automotive Cabin Temperature Sensing | Electronic Brake Force Distribution |
|---|---|
|
Use Scenario: Monitoring NTC thermistor voltage in HVAC control modules under wide ambient temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Precision DC amplifier buffering thermistor divider output before 16-bit SAR ADC sampling at 100Hz. Use Value: 3.5µV max offset and 10nV/°C drift ensure ≤0.1°C measurement error without calibration, satisfying UNECE R100 thermal accuracy requirements. |
Use Scenario: Amplifying millivolt-level signals from brake line pressure transducers during ABS activation cycles. IC Role / Device Role / Timing Role: Low-noise, fast-settling gain stage (AV = 100) driving ADC with 1.7ms 14-bit settling time. Use Value: 1.5µVP-P noise floor preserves resolution of 100kPa–2MPa pressure ranges; 6.5MHz GBWP supports transient response to 10kHz pressure spikes. |
| Onboard Battery Cell Voltage Monitoring | Seat Occupancy Detection via Strain Gauges |
|
Use Scenario: Measuring individual Li-ion cell voltages (±5mV full-scale) in 12S BMS modules with isolated CAN communication. IC Role / Device Role / Timing Role: High-CMRR buffer isolating cell stack from noisy digital domains while rejecting common-mode ripple. Use Value: 140dB PSRR and 115dB CMRR at +85°C suppress switching noise from adjacent DC-DC converters, ensuring <1mV measurement uncertainty. |
Use Scenario: Conditioning microvolt-level Wheatstone bridge outputs from seat-mounted strain gauges detecting occupant weight and posture. IC Role / Device Role / Timing Role: Ultra-low-drift instrumentation front-end with AV = 500, feeding 20-bit delta-sigma ADC in airbag control unit. Use Value: 0.1µV typical offset and 10nV/°C drift enable <0.5kg classification accuracy across vehicle lifetime without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARJZ-REEL7 | Unity-gain stable (1MHz GBWP), 1µV max offset at +125°C, no shutdown pin, same SOT23-6 package | Lacks AEC-Q100 qualification and active shutdown; suited for industrial but not automotive safety-critical use | Select when gain ≤1V/V is acceptable and automotive qualification is unnecessary |
| TSV912IQ2T | 2.4MHz GBWP, 1.5mV max offset at +125°C, rail-to-rail I/O, no zero-drift architecture | Higher offset and drift limit resolution in 16-bit+ systems; not suitable for uncalibrated thermocouple or strain gauge interfaces | Select for cost-sensitive non-precision applications where 12-bit accuracy suffices |
Compared with AD8628ARJZ-REEL7 and TSV912IQ2T, the MAX4239AUT/V+T uniquely combines AEC-Q100 Grade 1 qualification, 3.5µV max offset over full automotive temperature range, and integrated shutdown - making it the only option for calibrated, low-power, high-accuracy sensor front-ends in ASIL-B compliant systems.
Availability
MAX4239AUT/V+T is available at Aetrix Electronics and suitable for automotive cabin sensing, brake pressure monitoring, battery cell voltage measurement, and seat occupancy detection requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for MAX4239AUT/V+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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4238/MAX4239 product line targets ultra-precision DC-coupled sensor interfaces where near-zero offset, minimal drift, and low 1/f noise are mandatory - especially in automotive and medical instrumentation.
FAQ
What is the operating temperature range for MAX4239AUT/V+T?
The MAX4239AUT/V+T is rated for –40°C to +125°C ambient operation and is AEC-Q100 qualified (Grade 1). This specification is validated across all electrical parameters including input offset voltage (3.5µV max), offset drift (10nV/°C), and PSRR (120dB min), ensuring reliable performance in under-hood and passenger compartment automotive environments where the MAX4239AUT/V+T is commonly deployed.
Does MAX4239AUT/V+T require external compensation components?
No, the MAX4239AUT/V+T is internally compensated for minimum closed-loop gain of 10V/V and does not require external capacitors or resistors for stability. Its decompensated architecture delivers 6.5MHz GBWP while maintaining ≥60° phase margin at AV = 10V/V with 100pF load capacitance - simplifying layout in compact SOT23-6 implementations where the MAX4239AUT/V+T is used for strain gauge or thermocouple signal conditioning.
How does the shutdown mode affect output behavior in MAX4239AUT/V+T?
When SHDN is pulled low, the MAX4239AUT/V+T disables its internal zeroing clock and places the output in high-impedance state - not tri-state, but true high-Z with leakage <2µA. This prevents loading of downstream circuits during sleep, and recovery to active operation takes 4.3ms to achieve 16-bit accuracy (0.0015%), as specified in the MAX4239AUT/V+T electrical characteristics table for startup time at AV = 10.
Is MAX4239AUT/V+T compatible with single-supply 3.3V systems?
Yes, the MAX4239AUT/V+T operates from 2.7V to 5.5V, making it fully compatible with 3.3V single-supply systems. At VCC = 3.3V, its rail-to-rail output swings within 35mV of each rail into 1kΩ, delivering >3.2V of usable dynamic range. Input common-mode range extends to –0.05V, allowing direct interface with ground-referenced sensors - a key capability confirmed in the MAX4239AUT/V+T datasheet's VCM specification.
What package variant does MAX4239AUT/V+T use, and is it RoHS-compliant?
The MAX4239AUT/V+T uses the 6-pin SOT23 package with top mark "ACRX", designated by package code U6FH+6. The "+" suffix confirms it is lead(Pb)-free and RoHS-compliant per EU Directive 2011/65/EU. Its thermal resistance (θJA = 134.4°C/W on multilayer board) and footprint match industry-standard SOT23-6 land patterns (land pattern number 90-0175), ensuring drop-in compatibility in existing automotive PCB designs using the MAX4239AUT/V+T.
MAX4239AUT/V+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:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 6.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4239AUT/V+T FAQ
1.How can I place an order for MAX4239AUT/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4239AUT/V+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 MAX4239AUT/V+T reliable?
The price and inventory of MAX4239AUT/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4239AUT/V+T is usually 5 days.
3.What payment methods are accepted for MAX4239AUT/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4239AUT/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4239AUT/V+T?
MAX4239AUT/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4239AUT/V+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 MAX4239AUT/V+T?
For technical support, including MAX4239AUT/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4239AUT/V+T requirements.
6.How does Aetrix verify that MAX4239AUT/V+T is sourced from the original manufacturer or authorized distributors?
All MAX4239AUT/V+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 MAX4239AUT/V+T meets industry standards.
7.What is the process for return or replacement of MAX4239AUT/V+T?
All MAX4239AUT/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4239AUT/V+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 MAX4239AUT/V+T part is unused and in its original packaging.
Return procedure for MAX4239AUT/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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