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Analog Devices Inc./Maxim Integrated MAX4239ATT+T
- Part No.:
- MAX4239ATT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4239ATT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,137
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Product details
Overview
MAX4239ATT+T from Maxim Integrated is a decompensated, ultra-high-precision operational amplifier optimized for high-gain, low-noise 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 amplification of microvolt-level thermocouple or strain gauge signals in industrial instrumentation.
For engineers reviewing the MAX4239ATT+T datasheet, MAX4239ATT+T pinout, MAX4239ATT+T application, or MAX4239ATT+T equivalent, key selection criteria include its 10nV/°C offset drift, 1.5µVP-P (0.01Hz–10Hz) input noise, AEC-Q100-qualified automotive variant availability, and TDFN-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4239ATT+T employs patented autocorrelating zeroing architecture to continuously measure and cancel input offset and 1/f noise - eliminating long-term drift over temperature and time without chopper-induced intermodulation distortion. Its pseudorandom autozero clock (10kHz–15kHz) minimizes spectral artifacts while maintaining DC precision.
This decompensated amplifier requires closed-loop gain ≥10V/V for stability and achieves 6.5MHz GBWP with 1.6V/µs slew rate. It features ground-sensing inputs, rail-to-rail output driving 1kΩ loads, active-low shutdown (0.1µA), and operates across –40°C to +125°C - supporting high-accuracy ADC buffering in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - enables stable amplification at AV = 10V/V with sufficient phase margin for precision closed-loop designs. |
| Input Offset Voltage (max) | 3.5µV over –40°C to +125°C - ensures sub-LSB error in 16-bit systems with ≤13mV full-scale input range. |
| Offset Drift | 10nV/°C - limits thermal-induced error to 100nV over 10°C ambient shift, critical for uncalibrated sensor front-ends. |
| Input Noise (0.01Hz–10Hz) | 1.5µVP-P - preserves resolution of µV-level thermocouple outputs without requiring external filtering. |
| Supply Current | 600µA (active), 0.1µA (shutdown) - supports battery-powered portable instrumentation with low-quiescent-power sleep modes. |
| Output Swing (RL = 1kΩ) | VOL = 35mV, VOH = VCC – 35mV - delivers true rail-to-rail dynamic range for maximum ADC utilization with single-supply operation. |
| Common-Mode Range | VGND – 0.05V to VCC – 1.4V - allows direct interfacing to grounded sensors like strain gauges without level-shifting circuitry. |
Pinout & Package
MAX4239ATT+T is packaged in a 6-pin TDFN-EP (3mm × 3mm × 0.8mm) with exposed paddle (EP) that must be connected to GND for thermal and EMI performance. The package supports high-density layout and meets JEDEC JESD51-7 thermal standards (θJA = 42°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for supply, input, and output currents; EP must be soldered to GND plane for optimal thermal dissipation and noise immunity. |
| 2 - IN− | Inverting input | Differential input node; low 1pA bias current enables high-impedance sensor interfaces without significant loading error. |
| 3 - IN+ | Noninverting input | Differential input node; ground-sensing capability allows direct connection to grounded transducers like load cells. |
| 4 - OUT | Amplifier output | Rail-to-rail output capable of sourcing/sinking 40mA; high 140dB CMRR/PSRR rejects supply and common-mode interference. |
| 5 - SHDN | Active-low shutdown control | Pull low to enter 0.1µA standby; pull high to VCC for normal operation - enables power-gating in multi-channel data acquisition systems. |
| 6 - VCC | Positive supply | Single 2.7V–5.5V supply input; internal regulation ensures stable performance across wide input voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Autocorrelating zeroing architecture | Eliminates 1/f noise and drift without chopper ripple, enabling true DC precision in µV-level measurements. |
| Rail-to-rail output stage | Delivers full dynamic range into 1kΩ loads, maximizing effective resolution of 12–16-bit SAR and delta-sigma ADCs. |
| Ground-sensing input topology | Accepts common-mode voltages down to VGND – 0.05V, simplifying interface to grounded bridge sensors without bias networks. |
| AEC-Q100 qualified variants available | Automotive-grade versions (e.g., MAX4239AUT/V+T) support under-hood applications requiring extended temperature and reliability validation. |
| Low 10nV/°C offset drift | Reduces calibration frequency in field-deployed equipment - maintains accuracy over wide ambient operating ranges. |
Applications
| Thermocouple Signal Conditioning | Strain Gauge Amplification |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltage from K-type thermocouples across –40°C to +125°C industrial environments. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with zero-drift offset correction. Use Value: 0.1µV typical offset and 10nV/°C drift enable ±0.1°C measurement accuracy without periodic recalibration. |
Use Scenario: Boosting mV-level differential output from 350Ω Wheatstone bridge strain gauges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Low-noise, ground-sensing op-amp configured as difference amplifier with AV = 100V/V. Use Value: 1.5µVP-P (0.01Hz–10Hz) noise floor preserves microstrain resolution; rail-to-rail output drives ADC reference rails directly. |
| Medical Instrumentation Front-End | Electronic Scale Analog Signal Chain |
|
Use Scenario: Biopotential signal amplification in portable ECG/EMG devices requiring ultra-low DC drift and minimal 1/f noise. IC Role / Device Role / Timing Role: First-stage DC-coupled amplifier with active-low shutdown for power cycling between patient measurements. Use Value: 0.1µA shutdown current extends battery life; 140dB CMRR rejects 50/60Hz mains interference in unshielded clinical settings. |
Use Scenario: High-resolution weight measurement in retail and industrial scales using 24-bit delta-sigma ADCs. IC Role / Device Role / Timing Role: Low-drift buffer between load cell and sigma-delta modulator, rejecting thermal EMF errors. Use Value: 3.5µV max offset over –40°C to +125°C ensures <0.001% full-scale error across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Unity-gain stable (1MHz GBWP), 1µV max offset over –40°C to +125°C, no shutdown pin. | Lacks active-low shutdown and minimum gain constraint; better suited for unity-gain buffers than high-gain sensor stages. | Select AD8628ARZ when simplicity and guaranteed unity-gain stability outweigh need for 6.5MHz bandwidth or power gating. |
| LTC2057HMS8#PBF | Zero-drift op-amp with 5MHz GBWP, 1.5µV max offset over –40°C to +125°C, shutdown current 1.5µA. | Higher shutdown current and no AEC-Q100 automotive qualification; different pinout prevents drop-in replacement. | Choose LTC2057HMS8#PBF where lower cost and broader vendor availability are prioritized over 0.1µA shutdown or automotive compliance. |
Compared with AD8628ARZ and LTC2057HMS8#PBF, the MAX4239ATT+T uniquely combines 6.5MHz bandwidth at AV ≥ 10V/V, 0.1µA shutdown, AEC-Q100 variants, and TDFN-6 footprint - making it optimal for compact, high-gain, low-power sensor interfaces demanding long-term DC stability.
Availability
MAX4239ATT+T is available at Aetrix Electronics and suitable for thermocouple signal conditioning, strain gauge amplification, medical instrumentation front-ends, electronic scale analog signal chains, and automotive sensor modules requiring stable component supply across extended temperature ranges.
Supply support for MAX4239ATT+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, mixed-signal, and power management ICs for industrial, medical, and automotive applications - emphasizing precision, reliability, and integration.
The MAX4238/MAX4239 family targets ultra-high-precision DC-coupled signal conditioning, specifically addressing µV-level offset, nV/°C drift, and 1/f noise challenges in sensor front-ends for instrumentation and measurement systems.
FAQ
What is the minimum stable gain for MAX4239ATT+T?
The MAX4239ATT+T is decompensated and requires a minimum closed-loop gain of 10V/V for stability, as confirmed in the Electrical Characteristics table and Applications Information section. Operating below this gain risks oscillation due to insufficient phase margin. This differs from the unity-gain stable MAX4238ATT+T, which supports AV = 1V/V.
Does MAX4239ATT+T support rail-to-rail input operation?
No - the MAX4239ATT+T features ground-sensing inputs (VCM down to VGND – 0.05V) but does not support rail-to-rail input common-mode range. Its upper common-mode limit is VCC – 1.4V, as specified in the Electrical Characteristics table. This design enables direct interface to grounded sensors while maintaining precision near the negative rail.
What is the thermal performance of the TDFN-6 package for MAX4239ATT+T?
The MAX4239ATT+T in TDFN-6 package has θJA = 42°C/W on a multilayer board and θJC = 9°C/W, per JEDEC JESD51-7 testing. With 600µA supply current and 5.5V supply, power dissipation is ~3.3mW - resulting in <0.14°C junction rise above ambient, ensuring stable operation without heatsinking in typical PCB layouts.
Can MAX4239ATT+T drive a 10kΩ load with rail-to-rail output swing?
Yes - the MAX4239ATT+T delivers rail-to-rail output swing into 10kΩ loads: VOL ≤ 10mV and VOH ≥ VCC – 10mV at TA = +25°C, per the Electrical Characteristics table. At higher temperatures (–40°C to +125°C), output swing degrades slightly to VOL ≤ 20mV and VOH ≥ VCC – 20mV, still preserving >99% of full-scale range.
Is MAX4239ATT+T qualified for automotive applications?
The base MAX4239ATT+T is not automotive-qualified, but Maxim offers the pin-compatible MAX4239AUT/V+T variant, explicitly AEC-Q100 qualified for Grade 1 (–40°C to +125°C) operation. Both share identical electrical specifications and TDFN-6 packaging; only the marking and qualification documentation differ - enabling seamless migration for automotive designs.
MAX4239ATT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- 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:
- 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:
- 6-TDFN (3x3)
MAX4239ATT+T FAQ
1.How can I place an order for MAX4239ATT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4239ATT+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 MAX4239ATT+T reliable?
The price and inventory of MAX4239ATT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4239ATT+T is usually 5 days.
3.What payment methods are accepted for MAX4239ATT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4239ATT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4239ATT+T?
MAX4239ATT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4239ATT+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 MAX4239ATT+T?
For technical support, including MAX4239ATT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4239ATT+T requirements.
6.How does Aetrix verify that MAX4239ATT+T is sourced from the original manufacturer or authorized distributors?
All MAX4239ATT+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 MAX4239ATT+T meets industry standards.
7.What is the process for return or replacement of MAX4239ATT+T?
All MAX4239ATT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4239ATT+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 MAX4239ATT+T part is unused and in its original packaging.
Return procedure for MAX4239ATT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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