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Analog Devices Inc./Maxim Integrated MAX40088AUT+T
- Part No.:
- MAX40088AUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX40088AUT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX40088AUT+T from Maxim Integrated is a decompensated, gain-of-5 stable, low-noise operational amplifier optimized for high-fidelity signal conditioning in precision analog systems. It delivers 42MHz gain-bandwidth product, 10V/µs slew rate, ultra-low input voltage-noise density (4.2nV/√Hz at 30kHz), <1pA typical input bias current, and rail-to-rail output swing - enabling high-speed, low-distortion buffering in 16-bit DAC outputs and transimpedance amplifiers.
For engineers reviewing the MAX40088AUT+T datasheet, MAX40088AUT+T pinout, MAX40088AUT+T application, or MAX40088AUT+T equivalent, this page provides verified specifications, validated SOT23-6 pin mapping, real-world use cases in medical instrumentation and sensor interfaces, and two confirmed alternative op amps with documented functional trade-offs.
Technical Context
The MAX40088AUT+T is a BiCMOS decompensated op amp requiring minimum closed-loop gain of 5V/V for stability, achieving 42MHz GBW and 80° phase margin. Its input stage features ultra-low input bias current (<1pA typ) and dual noise optimization: 4.2nV/√Hz voltage noise at 30kHz and 0.5fA/√Hz current noise - critical for high-impedance photodiode and strain gauge interfaces.
It supports single-supply operation from +2.7V to +5.5V with input common-mode range extending to ground and rail-to-rail output swing within 30mV of supplies into 1kΩ. Shutdown mode reduces supply current to ≤1.7µA while placing output in high-impedance state - essential for power-constrained portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz - enables stable closed-loop operation at ≥5V/V gain with sufficient loop gain for precision filtering and anti-aliasing. |
| Slew Rate | 10V/µs - supports fast settling (2µs to 0.01%) for 2V step signals in high-resolution DAC buffer applications. |
| Input Voltage-Noise Density | 4.2nV/√Hz at 30kHz - ensures minimal added noise in audio and medical front-end amplification where SNR >110dB is required. |
| Input Bias Current | <1pA (typ) - preserves accuracy in high-Z sensor interfaces (e.g., piezoelectric transducers, pH electrodes) without significant offset drift. |
| THD+N | -110dB (20kHz, 1kΩ load) - meets distortion requirements for 16-bit data converters operating up to Nyquist frequency. |
| Supply Voltage Range | +2.7V to +5.5V - compatible with Li-ion battery-powered systems and industrial 3.3V/5V rails without level-shifting. |
| Shutdown Current | ≤1.7µA - allows microamp-level power gating in duty-cycled sensor nodes without external switches. |
Pinout & Package
MAX40088AUT+T is packaged in a 6-pin SOT23 (Package Code U6+1A, Outline 21-0058) with exposed pad thermal performance optimized for PCB heat dissipation on four-layer boards (θJA = 115°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VSS) | Negative supply / ground reference | Must be connected to system ground; supports single-supply operation and defines input common-mode lower bound (to −0.1V). |
| 2 (IN+) | Non-inverting input | High-impedance node (1000GΩ) for precision voltage sensing; accepts DC-coupled inputs down to ground. |
| 3 (OUT) | Amplifier output | Rail-to-rail capable (within 30mV of VSS/VDD into 1kΩ); drives capacitive loads up to 200pF without oscillation. |
| 4 (IN−) | Inverting input | 10pF input capacitance requires feed-forward compensation (CZ) when feedback resistance exceeds 5kΩ to maintain phase margin. |
| 5 (SHDN) | Active-low shutdown control | Pulled high to VDD for normal operation; sinking ≤1µA when asserted low places output in high-Z state and cuts supply current to ≤1.7µA. |
| 6 (VDD) | Positive supply | Requires local 0.1µF ceramic + 4.7µF bulk decoupling; supports operation up to +5.5V with 90dB PSRR (DC). |
Key Features
| Feature | Design Value |
|---|---|
| Gain-of-5 stability | Enables 42MHz bandwidth with higher loop gain than unity-gain op amps - improving AC accuracy and reducing gain error at high frequencies. |
| Ultra-low 1/f voltage noise | 1.7µVP-P (0.1Hz–10Hz) - minimizes baseline wander in ECG and EEG amplifiers where DC stability and low-frequency fidelity are critical. |
| EMI rejection ratio | 55dB (900MHz–2.4GHz) - suppresses RF interference from cellular/WiFi sources in automotive and portable medical devices. |
| Rail-to-rail output with 20mA drive | Delivers ±20mA source/sink current while maintaining DC accuracy - eliminates need for external output buffers in driving ADC reference drivers or active filters. |
| AEC-Q100 qualified | Rated for automotive powertrain applications (−40°C to +125°C) with guaranteed parametric performance across full temperature range. |
Applications
| ADC Buffers | DAC Output Amplifiers |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs with 16-bit resolution and sampling rates up to 1MSPS. IC Role / Device Role / Timing Role: Precision voltage follower/buffer isolating ADC input from source impedance and minimizing charge kickback. Use Value: Input bias current <1pA prevents code-dependent offset errors; 42MHz GBW ensures flat frequency response through Nyquist band. |
Use Scenario: Amplifying unbuffered voltage outputs of 16-bit DACs (e.g., MAX5541) in programmable power supplies and calibration equipment. IC Role / Device Role / Timing Role: Low-distortion output driver delivering rail-to-rail swing with <0.00035% THD+N at 20kHz. Use Value: 10V/µs slew rate settles 2V steps in 2µs to 0.01%, preserving DAC monotonicity and dynamic linearity. |
| Transimpedance Amplifiers | Medical Instrumentation |
Use Scenario: Converting photocurrent from low-light photodiodes in pulse oximeters and spectroscopy systems. IC Role / Device Role / Timing Role: High-gain TIA front-end with ultra-low input current noise (0.5fA/√Hz) and wide bandwidth. Use Value: Sub-picoamp input bias avoids saturation; 42MHz GBW supports fast optical pulse detection with minimal phase lag. |
Use Scenario: Front-end amplification in portable ECG/EEG monitors requiring DC-coupled, low-drift, low-noise signal chains. IC Role / Device Role / Timing Role: Ground-sensing, rail-to-rail op amp for biopotential acquisition with input CM range including 0V. Use Value: No phase reversal under overdrive; 1.7µVP-P 0.1Hz–10Hz noise ensures clean baseline for arrhythmia detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1612AIDR | Unity-gain stable (1.2MHz GBW), lower voltage noise (1.1nV/√Hz), but 10× higher input bias current (±10pA). | Better for ultra-low-noise audio; unsuitable for high-Z sensor interfaces requiring sub-pA bias. | Select OPA1612AIDR only when voltage noise dominates and gain ≥1 is acceptable; avoid for transimpedance or piezo applications. |
| ADA4898-1ARZ | Unity-gain stable (65MHz GBW), higher slew rate (85V/µs), but higher supply current (10mA) and no shutdown mode. | Preferred for high-speed oscilloscope front-ends; not viable for battery-powered or thermally constrained designs. | Choose ADA4898-1ARZ when speed and drive strength outweigh power and integration needs; MAX40088AUT+T remains optimal for portable, low-power precision systems. |
Compared with OPA1612AIDR and ADA4898-1ARZ, the MAX40088AUT+T uniquely balances 42MHz bandwidth, sub-pA bias, integrated shutdown, and AEC-Q100 qualification - making it the only option among the three suitable for automotive-grade, battery-operated, high-impedance sensor signal chains requiring both speed and ultra-low leakage.
Availability
MAX40088AUT+T is available at Aetrix Electronics and suitable for medical instrumentation, automotive powertrain monitoring, and precision DAC/ADC interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX40088AUT+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 precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The MAX40075/MAX40088 family targets high-dynamic-range signal chains requiring simultaneous low noise, low distortion, and rail-to-rail operation - especially in space-constrained, low-power systems interfacing with 16-bit+ data converters.
FAQ
What is the minimum stable gain for MAX40088AUT+T?
The MAX40088AUT+T is gain-of-5 stable, meaning it requires a minimum closed-loop gain of 5V/V (non-inverting) or −5V/V (inverting) for unconditional stability. Attempting unity-gain configurations will cause peaking or oscillation. This decompensation enables its 42MHz gain-bandwidth product and 10V/µs slew rate - key differentiators versus unity-gain alternatives like the MAX40075AUT+T.
Does MAX40088AUT+T support true rail-to-rail input operation?
No - the MAX40088AUT+T features rail-to-rail *output* swing but has an input common-mode voltage range from −0.1V to (VDD − 1.5V). While it includes ground in its input range (enabling low-side current sensing), it cannot accept inputs at the positive rail. This design trades input rail-to-rail capability for ultra-low input bias current and noise performance.
How does the shutdown mode affect the output state of MAX40088AUT+T?
When SHDN is pulled low, the MAX40088AUT+T disables its internal circuitry and places the output terminal in a high-impedance (Hi-Z) state - effectively disconnecting it from the load. This prevents loading of downstream circuits during sleep modes. Supply current drops to ≤1.7µA, and the amplifier resumes normal operation within 13µs after SHDN returns high.
Is MAX40088AUT+T suitable for driving 50Ω transmission lines?
No - the MAX40088AUT+T is not designed for 50Ω line driving. Its output stage delivers ±20mA into resistive loads but lacks the current drive and bandwidth headroom needed for clean 50Ω termination. For such applications, dedicated high-speed line drivers (e.g., THS3201) are recommended. The MAX40088AUT+T excels instead at driving 1kΩ+ loads, ADC inputs, and capacitive sensor interfaces.
What decoupling capacitors are required for stable operation of MAX40088AUT+T?
The MAX40088AUT+T requires a 0.1µF ceramic capacitor placed as close as possible to the VDD pin, plus a 4.7µF bulk capacitor (tantalum or ceramic) at the board-level power entry point. This dual-stage decoupling suppresses high-frequency noise and transient supply droop. Failure to implement both capacitors may degrade PSRR, increase THD+N, and induce instability under dynamic load conditions.
MAX40088AUT+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:
- -
- -3db Bandwidth:
- 42 MHz
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 2.5mA
- Current - Output / Channel:
- -
- 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
MAX40088AUT+T FAQ
1.How can I place an order for MAX40088AUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40088AUT+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 MAX40088AUT+T reliable?
The price and inventory of MAX40088AUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40088AUT+T is usually 5 days.
3.What payment methods are accepted for MAX40088AUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40088AUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40088AUT+T?
MAX40088AUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40088AUT+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 MAX40088AUT+T?
For technical support, including MAX40088AUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40088AUT+T requirements.
6.How does Aetrix verify that MAX40088AUT+T is sourced from the original manufacturer or authorized distributors?
All MAX40088AUT+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 MAX40088AUT+T meets industry standards.
7.What is the process for return or replacement of MAX40088AUT+T?
All MAX40088AUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40088AUT+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 MAX40088AUT+T part is unused and in its original packaging.
Return procedure for MAX40088AUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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