My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4239ATT+
- Part No.:
- MAX4239ATT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4239ATT+.pdf
- Description:
- MAX4239 ULTRA-LOW OFFSET/DRIFT,
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4239ATT+ 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 - enabling accurate amplification of microvolt-level signals from strain gauges and thermocouples in single-supply industrial instrumentation.
For engineers reviewing the MAX4239ATT+ datasheet, MAX4239ATT+ pinout, MAX4239ATT+ application, or MAX4239ATT+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions for TDFN-EP package, and two confirmed alternative parts with documented functional trade-offs for precision DC-coupled measurement systems.
Technical Context
The MAX4239ATT+ uses patented autocorrelating zeroing to continuously measure and cancel input offset and 1/f noise - achieving 0.1µV typical VOS and 10nV/°C drift over –40°C to +125°C. Its decompensated architecture requires closed-loop gain ≥10V/V for stability, delivering 6.5MHz GBWP while maintaining 140dB CMRR and PSRR at DC.
It features ground-sensing inputs, rail-to-rail output (35mV headroom at 1kΩ load), active-low shutdown (0.1µA quiescent current), and operates from 2.7V to 5.5V. The TDFN-EP package includes an exposed paddle tied to GND for thermal and noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - enables stable 10V/V amplification up to ~650kHz without phase margin degradation. |
| Input Offset Voltage (TYP) | 0.1µV - reduces DC error to <0.001% FS in 100mV full-scale 16-bit systems over temperature. |
| Offset Drift | 10nV/°C - contributes only 100nV error across 10°C ambient shift, critical for uncalibrated field instruments. |
| Supply Current | 600µA - supports battery-powered portable instrumentation with >1-year runtime on coin cell. |
| Shutdown Current | 0.1µA - allows deep sleep between sensor readings without external power switches. |
| CMRR / PSRR | 140dB each - rejects common-mode noise from shared grounds and supply ripple in mixed-signal PCBs. |
| Output Swing (1kΩ) | VOL = 35mV, VOH = VCC–35mV - preserves >99% dynamic range when driving 12-bit+ SAR ADCs directly. |
Pinout & Package
MAX4239ATT+ is housed in a 6-pin TDFN-EP (3mm × 3mm × 0.8mm) package with exposed paddle (EP) that must be soldered to GND for optimal thermal dissipation and EMI immunity. Pin 1 is marked with "+ANH" top-side marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Drives ADC input or next-stage filter; rail-to-rail swing ensures full utilization of ADC reference range. |
| 2 (GND) | Ground Reference | Primary return path for signal and power; connects to EP for lowest impedance ground loop. |
| 3 (IN+) | Noninverting Input | High-impedance (1pA IB) node for low-leakage sensor interfaces like thermocouples and bridge transducers. |
| 4 (IN−) | Inverting Input | Accepts feedback network; matched to IN+ for minimal input bias current-induced offset. |
| 5 (SHDN) | Active-Low Shutdown Control | Pull low to disable amplifier and reduce ICC to 0.1µA; no external pull-up required if always active. |
| 6 (VCC) | Positive Supply | Accepts 2.7V–5.5V; internal regulation enables stable operation across Li-ion or regulated 3.3V rails. |
| EP | Exposed Thermal Pad | Must be soldered to solid GND plane; improves θJA by 18.2°C/W and reduces thermal drift contribution. |
Key Features
| Feature | Design Value |
|---|---|
| Autocorrelating Zeroing Architecture | Eliminates 1/f noise and long-term drift - enables true DC accuracy without periodic recalibration. |
| Rail-to-Rail Output Stage | Delivers 35mV min. headroom at 1kΩ load - avoids clipping when buffering ±100mV bridge outputs into 3.3V ADCs. |
| Ground-Sensing Inputs | Operates with inputs down to VGND − 0.05V - supports direct connection to low-side current shunts or grounded sensors. |
| Low 1.5µVP-P Noise (0.01–10Hz) | Enables resolution of sub-microvolt signals in slow-scan applications like load cell weighing and medical bio-potential sensing. |
| 140dB CMRR at DC | Rejects interference from shared ground paths in multi-channel data acquisition systems with common reference planes. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from Type-K thermocouples across –40°C to +125°C industrial environments. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with auto-zero correction for drift-free cold-junction compensation. Use Value: 0.1µV offset and 10nV/°C drift ensure <±0.1°C measurement uncertainty without software calibration over full temperature range. |
Use Scenario: Conditioning mV-level differential outputs from 350Ω Wheatstone bridges in electronic scales and pressure transducers. IC Role / Device Role / Timing Role: High-gain (AV ≥ 10V/V), low-noise buffer stage before 24-bit sigma-delta ADCs. Use Value: 6.5MHz GBWP supports fast settling (<2.3ms for 16-bit) after bridge excitation switching, enabling high-throughput weigh cycles. |
| Medical Instrumentation Front-End | High-Accuracy Electronic Scales |
|
Use Scenario: Amplifying low-amplitude bio-signals (ECG, EMG) with minimal DC drift and 1/f noise in portable diagnostic devices. IC Role / Device Role / Timing Role: First-stage DC-stable amplifier with shutdown control for power-gated analog front-ends. Use Value: 0.1µV offset and 1.5µVP-P (0.01–10Hz) noise preserve signal integrity below 1µV thresholds required for clinical-grade detection. |
Use Scenario: Digitizing millivolt outputs from precision load cells in Class III legal-for-trade weighing systems. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage ensuring metrological compliance under varying ambient conditions. Use Value: 3.5µV max offset over –40°C to +125°C eliminates temperature-induced zero-point drift exceeding OIML R76 limits. |
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 VOS at +25°C, no shutdown pin. | Lacks active shutdown and minimum-gain constraint - suitable for unity-gain buffers but not high-speed, high-gain sensor interfaces. | Select AD8628ARZ only when gain ≤ 1V/V and shutdown is unnecessary; MAX4239ATT+ preferred for AV ≥ 10V/V with low-power cycling. |
| LTC2057HS5#TRMPBF | Zero-drift op-amp with 0.5µV max VOS, 2MHz GBWP, shutdown capability, but 5-pin SOT23 package limits layout flexibility. | Lower GBWP restricts bandwidth in fast-settling 16-bit+ systems; smaller package complicates thermal management for continuous operation. | Choose LTC2057HS5#TRMPBF for space-constrained designs where 2MHz suffices; MAX4239ATT+ offers 3.25× higher GBWP and superior thermal pad for sustained accuracy. |
Compared with AD8628ARZ and LTC2057HS5#TRMPBF, the MAX4239ATT+ uniquely combines 6.5MHz GBWP, guaranteed 10V/V minimum gain stability, integrated shutdown, and TDFN-EP thermal performance - making it the only option qualified for high-accuracy, high-bandwidth, low-power sensor front-ends requiring metrological traceability.
Availability
MAX4239ATT+ is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, medical instrumentation front-ends, high-accuracy electronic scales, and precision ADC buffering requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for MAX4239ATT+ 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 precision, power, and interface applications in industrial, medical, and communications systems.
The MAX4238/MAX4239 family targets ultra-high-precision DC-coupled measurement systems where near-zero offset, ultra-low drift, and 1/f noise cancellation are mandatory - especially in uncalibrated, wide-temperature, battery-operated instrumentation.
FAQ
What is the minimum stable gain for MAX4239ATT+ and why does it matter?
The MAX4239ATT+ requires a minimum closed-loop gain of 10V/V for stability due to its decompensated internal architecture. Operating below this gain risks oscillation or excessive overshoot. This differs from unity-gain stable amplifiers like the MAX4238, and must be enforced in PCB layout and feedback network design to ensure reliable 6.5MHz bandwidth performance in the MAX4239ATT+.
How does the autocorrelating zeroing technique in MAX4239ATT+ improve long-term accuracy?
The MAX4239ATT+ uses patented autocorrelating zeroing to sample and cancel input offset voltage and 1/f noise in real time - reducing drift to 10nV/°C and eliminating aging effects. Unlike chopper-stabilized amps, its pseudorandom clock (10–15kHz) minimizes intermodulation distortion, making the MAX4239ATT+ ideal for precision DC measurements where calibration intervals exceed months or years.
Can MAX4239ATT+ drive a 12-bit SAR ADC directly, and what output swing can I expect?
Yes, the MAX4239ATT+ can directly drive 12-bit SAR ADCs. With RL = 1kΩ, its rail-to-rail output delivers VOL = 35mV and VOH = VCC – 35mV - preserving >99% of full-scale range for 3.3V or 5V supplies. This eliminates need for level-shifting stages and maintains SNR integrity in the MAX4239ATT+ signal chain.
What is the role of the exposed paddle (EP) on the MAX4239ATT+ TDFN package?
The exposed paddle (EP) on the MAX4239ATT+ TDFN-EP package must be soldered to a GND plane to provide low-thermal-resistance heat dissipation (18.2mW/°C derating) and reduced ground impedance. Leaving EP floating degrades PSRR, increases thermal drift, and risks instability - proper EP grounding is essential for achieving the MAX4239ATT+'s specified 140dB PSRR and 10nV/°C drift performance.
Does MAX4239ATT+ support single-supply operation, and what is its common-mode input range?
Yes, the MAX4239ATT+ operates from a single 2.7V to 5.5V supply. Its ground-sensing inputs accept common-mode voltages from VGND – 0.05V to VCC – 1.4V, enabling direct interfacing with low-side current shunts, grounded thermocouples, and bridge transducers without level-shifting circuitry - a key enabler for simplified, high-accuracy single-supply sensor nodes using the MAX4239ATT+.
MAX4239ATT+ 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-EP (3x3)
MAX4239ATT+ FAQ
1.How can I place an order for MAX4239ATT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4239ATT+ 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+ reliable?
The price and inventory of MAX4239ATT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4239ATT+ is usually 5 days.
3.What payment methods are accepted for MAX4239ATT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4239ATT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4239ATT+?
MAX4239ATT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4239ATT+ 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+?
For technical support, including MAX4239ATT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4239ATT+ requirements.
6.How does Aetrix verify that MAX4239ATT+ is sourced from the original manufacturer or authorized distributors?
All MAX4239ATT+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX4239ATT+?
All MAX4239ATT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4239ATT+, 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+ part is unused and in its original packaging.
Return procedure for MAX4239ATT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4239ATT+ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
