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Analog Devices Inc./Maxim Integrated MAX40087AUT+T
- Part No.:
- MAX40087AUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX40087AUT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
MAX40087AUT+T from Analog Devices is a single-channel, decompensated, low-noise operational amplifier optimized for gain ≥ 5V/V stable operation. It delivers 42MHz gain-bandwidth product, 10V/µs slew rate, ultra-low input bias current (0.3pA typ), 4.2nV/√Hz input voltage noise density at 30kHz, and 0.00035% THD+N into 1kΩ - enabling high-fidelity signal conditioning in transimpedance amplifiers and precision sensor interfaces.
For engineers reviewing the MAX40087AUT+T datasheet, MAX40087AUT+T pinout, MAX40087AUT+T application, or MAX40087AUT+T equivalent, this page provides verified electrical specifications, validated SOT23-6 pin mapping, real-world TIA and pH probe use cases, and two confirmed alternative op amps with documented performance trade-offs.
Technical Context
The MAX40087AUT+T employs a decompensated architecture requiring minimum closed-loop gain of +5V/V to ensure stability, distinguishing it from unity-gain-stable variants like MAX40079. Its 42MHz GBWP and 10V/µs slew rate support fast settling in high-speed DAC output buffering and wideband imaging front-ends.
It features rail-to-rail output swing (within 80mV of rails into 1kΩ), input common-mode range extending to ground, and integrated ESD protection with 60Ω series resistors on both inputs - enabling robust interfacing with high-impedance sources such as photodiodes and reference electrodes without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 42MHz minimum - enables stable closed-loop gain ≥ +5V/V with sufficient phase margin for precision wideband applications. |
| Slew Rate | 10V/µs - supports fast transient response in DAC output amplification and ADC driver stages without slewing-induced distortion. |
| Input Voltage Noise Density | 4.2nV/√Hz at 30kHz - ensures minimal added noise when amplifying low-level signals from pH probes or strain gauges. |
| Input Bias Current | 0.3pA typical - preserves signal integrity in transimpedance amplifiers with feedback resistors >100MΩ. |
| THD+N | 0.00035% (–109dB) at 1kHz, 1kΩ load - meets dynamic range requirements for 16-bit data acquisition systems. |
| Supply Voltage Range | +2.7V to +5.5V - compatible with modern low-voltage microcontroller I/O domains and battery-powered instrumentation. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin sensors and industrial process control environments. |
Pinout & Package
MAX40087AUT+T is housed in a 6-pin SOT23 package (package code U6+1, outline 21-0058), measuring 2.9mm × 1.6mm × 1.1mm, with RoHS-compliant matte tin lead finish and 0.95mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Rail-to-rail capable; sinks/sourses ±20mA; swings within 80mV of VDD/VSS into 1kΩ load. |
| 2 - VSS | Negative supply | Connect to 0V in single-supply systems; input common-mode range extends below VSS by 0.1V. |
| 3 - IN+ | Non-inverting input | High-impedance node (1000GΩ); accepts DC-coupled signals down to ground level. |
| 4 - IN− | Inverting input | Protected by 60Ω series resistors and back-to-back diodes; differential input rating ±6V (transient). |
| 5 - SHDN | Shutdown control | Active-low; pulls supply current to 0.4µA and places output in high-impedance state when driven low. |
| 6 - VDD | Positive supply | Accepts 2.7V–5.5V; PSRR >90dB DC ensures immunity to digital supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated stability | Guaranteed stable only for closed-loop gain ≥ +5V/V - enables higher bandwidth than unity-gain alternatives without sacrificing phase margin. |
| Ultra-low input current noise | 0.5fA/√Hz - critical for preserving SNR in high-Z current-sensing applications like photodiode TIAs. |
| Integrated shutdown | Reduces quiescent current to 0.4µA while disabling output - essential for power-constrained portable medical devices. |
| Rail-to-rail output stage | Delivers full dynamic range across 2.7V–5.5V supplies - eliminates need for level-shifting in low-voltage data acquisition. |
| Input overvoltage protection | ±6V transient rating on inputs with internal 60Ω current-limiting resistors - reduces external protection component count in harsh environments. |
Applications
| Transimpedance Amplifier (TIA) | pH Probe Interface |
|---|---|
Use Scenario: Converting photocurrent from a silicon photodiode (10pF–100pF junction capacitance) into a precise voltage signal for optical sensing. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with feedback resistor up to 1GΩ; configured for gain ≥ +5V/V to maintain 42MHz bandwidth and stability. Use Value: 0.3pA input bias current prevents DC error accumulation; 4.2nV/√Hz noise density preserves weak-signal resolution at 10kHz bandwidth. | Use Scenario: Buffering mV-level output from glass electrode pH sensors in lab-grade analyzers and water quality monitors. IC Role / Device Role / Timing Role: Unity-gain voltage follower with ultra-high input impedance (>1000GΩ) and rail-to-rail output swing. Use Value: Input bias current <0.3pA avoids electrolyte polarization errors; –40°C to +125°C operation supports sterilization cycles. |
| ADC Driver | DAC Output Amplifier |
Use Scenario: Driving SAR ADC inputs (e.g., AD7980) requiring low THD+N and fast settling to 16-bit accuracy. IC Role / Device Role / Timing Role: Low-distortion buffer between analog source and ADC sample capacitor; operates at AV = +5V/V to leverage full 42MHz GBW. Use Value: 0.00035% THD+N ensures no harmonic corruption of 1kHz sine wave inputs; 2µs 0.01% settling time matches 1MSPS sampling. | Use Scenario: Amplifying and level-shifting unbuffered DAC outputs (e.g., AD5662) to drive 0–5V actuator control lines. IC Role / Device Role / Timing Role: Gain-of-2 non-inverting amplifier with shutdown capability during system sleep modes. Use Value: Shutdown current <0.4µA minimizes standby power; rail-to-rail output ensures full 0–5V compliance with 3.3V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, high-input-impedance operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40079AUT+T | Unity-gain stable; 10MHz GBWP; 3V/µs slew rate; same 0.3pA IB and 4.2nV/√Hz en. | Preferred for unity-gain buffers, pH probes, and low-bandwidth TIAs where stability at AV = +1 is required. | Select MAX40079AUT+T when gain < +5V/V is needed; MAX40087AUT+T is superior for AV ≥ +5V/V with higher speed demands. |
| OPA377AIDBVR | Unity-gain stable; 10MHz GBWP; 2.5V/µs slew rate; 0.2pA IB; 7.5nV/√Hz en at 1kHz. | Better input bias current but higher voltage noise; lacks shutdown pin and specified operation beyond +85°C. | Choose OPA377AIDBVR for cost-sensitive, commercial-temp applications needing lowest IB; MAX40087AUT+T remains preferred for extended temperature and low-noise TIA designs. |
Compared with MAX40079AUT+T, MAX40087AUT+T trades unity-gain stability for 4.2× higher bandwidth and 3.3× faster slew rate - making it optimal for gain ≥ +5V/V signal chains. Against OPA377AIDBVR, it offers guaranteed –40°C to +125°C operation, integrated shutdown, and lower voltage noise at 30kHz, at the expense of slightly higher input bias current.
Availability
MAX40087AUT+T is available at Aetrix Electronics and suitable for transimpedance amplifiers, pH probe interfaces, and precision DAC output amplification requiring stable component supply across automotive, industrial, and medical design cycles.
Supply support for MAX40087AUT+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets.
The MAX40087AUT+T belongs to the MAX400xx family of ultra-low-input-bias-current, low-noise op amps - engineered specifically for high-impedance sensor signal conditioning, including photodiode TIAs, electrochemical sensors, and medical biosignal acquisition.
FAQ
What is the minimum stable gain for MAX40087AUT+T?
The MAX40087AUT+T is decompensated and requires a minimum closed-loop gain of +5V/V for stable operation. Attempting unity-gain or gain-of-2 configurations may cause oscillation or excessive ringing. This is explicitly defined in the Electrical Characteristics table under "Phase Margin" and "Gain Margin" conditions for AV = +5 versions. Always verify stability with actual load and PCB parasitics using the recommended feed-forward compensation capacitor CZ when RG||RF exceeds 5kΩ.
Does MAX40087AUT+T support true rail-to-rail input common-mode range?
The MAX40087AUT+T supports rail-to-rail *output* swing but its input common-mode voltage range extends from VSS – 0.1V to VDD – 1.5V over temperature - meaning it includes ground but does not reach VDD. This allows ground-referenced sensor inputs (e.g., pH electrodes, shunt current sense) while maintaining CMRR >87dB. The input stage is not designed for direct VDD-referenced signals without external attenuation or level shifting.
Can MAX40087AUT+T be used in transimpedance amplifier circuits?
Yes, MAX40087AUT+T is explicitly recommended for transimpedance amplifier (TIA) applications in its datasheet, especially where higher bandwidth (>10MHz) and gain ≥ +5V/V are acceptable. Its 0.3pA input bias current minimizes DC error with large feedback resistors (e.g., 100MΩ–1GΩ), and its 42MHz GBWP enables stable operation with photodiode capacitances up to ~10pF when properly compensated. Use CZ = 10 × (RF/RG) pF for optimal phase margin.
What is the shutdown current specification for MAX40087AUT+T?
The shutdown supply current for MAX40087AUT+T is 0.4µA maximum, as specified in the Electrical Characteristics table under "Shutdown Supply Current (ISHDN)" with SHDN = GND. During shutdown, the output enters a high-impedance state, and all internal bias currents are reduced. This feature is exclusive to the single-channel variants (MAX40079/MAX40087) and is not available on dual or quad versions of the family.
Is MAX40087AUT+T qualified for automotive applications?
MAX40087AUT+T is rated for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements per Analog Devices' qualification report for the MAX400xx family. It is suitable for under-hood and cabin automotive applications including battery monitoring, exhaust gas sensing, and HVAC sensor interfaces - provided board-level ESD and EMC design guidelines are followed per Application Note AN1891.
MAX40087AUT+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:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 42 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 2.5mA
- 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-6
MAX40087AUT+T FAQ
1.How can I place an order for MAX40087AUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40087AUT+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 MAX40087AUT+T reliable?
The price and inventory of MAX40087AUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40087AUT+T is usually 5 days.
3.What payment methods are accepted for MAX40087AUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40087AUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40087AUT+T?
MAX40087AUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40087AUT+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 MAX40087AUT+T?
For technical support, including MAX40087AUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40087AUT+T requirements.
6.How does Aetrix verify that MAX40087AUT+T is sourced from the original manufacturer or authorized distributors?
All MAX40087AUT+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 MAX40087AUT+T meets industry standards.
7.What is the process for return or replacement of MAX40087AUT+T?
All MAX40087AUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40087AUT+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 MAX40087AUT+T part is unused and in its original packaging.
Return procedure for MAX40087AUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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