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Analog Devices Inc. AD8691WAUJZ-R7
- Part No.:
- AD8691WAUJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AD8691WAUJZ-R7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
AD8691WAUJZ-R7 from Analog Devices is a single-channel, rail-to-rail output, CMOS operational amplifier optimized for automotive-grade signal conditioning in low-noise, low-power applications. It delivers 10 MHz gain bandwidth, 8 nV/√Hz voltage noise density at 1 kHz, 400 µV typical offset voltage, and operates from 2.7 V to 6 V single supply across −40°C to +125°C. It is used in photodiode amplification and battery-powered medical instrumentation.
For engineers reviewing the AD8691WAUJZ-R7 datasheet, AD8691WAUJZ-R7 pinout, AD8691WAUJZ-R7 application, or AD8691WAUJZ-R7 equivalent, key selection criteria include its automotive qualification, 5-lead TSOT package footprint, rail-to-rail output swing within 25 mV of rails (IL = 1 mA), and guaranteed 6 µV/°C max offset drift over temperature.
Technical Context
The AD8691WAUJZ-R7 employs a CMOS input stage enabling 1 pA maximum input bias current and 2.5 pF differential input capacitance, supporting high-impedance sensor interfacing without significant loading. Its unity-gain stable architecture achieves 65° phase margin with 10 MHz GBP and 5 V/µs slew rate under 2 kΩ load.
Designed for single-supply operation, it features rail-to-rail output swing (25 mV low-side, 2.66 V high-side at VS = 2.7 V, IL = 1 mA) and common-mode input range extending 0.3 V beyond V–, enabling direct coupling in 3 V systems. It meets AEC-Q100 stress testing requirements for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports direct integration into 3.3 V and 5 V automotive subsystems without level-shifting. |
| Gain Bandwidth Product | 10 MHz - enables stable closed-loop operation up to ~1 MHz with gain ≥10 for filter and sensor signal chain stages. |
| Input Offset Voltage | 0.4 mV typical (25°C), 3.0 mV max (−40°C to +125°C) - ensures <1 LSB error in 12-bit ADC front-ends with gain ≤5. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - critical for preserving SNR in photodiode transimpedance amplifiers and precision sensor buffers. |
| Input Bias Current | 1 pA maximum - prevents leakage-induced errors in pH sensors, piezoelectric elements, and high-Z electrode interfaces. |
| Output Drive Capability | ±20 mA short-circuit current, 25 mV VOL @ 1 mA - drives 2 kΩ loads while maintaining rail-to-rail swing in portable medical devices. |
| Offset Drift | 2 µV/°C to 12 µV/°C (AD8691-specific) - ensures <1.2 mV total offset shift over full automotive temperature range. |
Pinout & Package
AD8691WAUJZ-R7 is housed in a 5-lead Thin Small Outline Transistor (TSOT) package (JEDEC MO-193-AB compliant), measuring 2.90 mm × 1.60 mm × 0.95 mm (max height), with gull-wing leads for surface-mount assembly and thermal resistance θJA = 207°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Capable of rail-to-rail swing (25 mV above V–, 2.66 V below V+ at VS = 2.7 V, IL = 1 mA); drives capacitive loads up to 200 pF stably. |
| 2 - V– | Negative supply / ground reference | Connects to system ground or negative rail; common-mode input extends 0.3 V below this pin. |
| 3 - +IN | Non-inverting input | CMOS input with 1 pA max bias current; differential capacitance 2.5 pF enables stable high-frequency feedback networks. |
| 4 - –IN | Inverting input | Matches +IN in bias current and capacitance; used for precision closed-loop configurations including transimpedance and difference amplifiers. |
| 5 - V+ | Positive supply | Accepts 2.7 V to 6 V; PSRR of 95 dB minimizes supply ripple coupling into output at DC–100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers 25 mV to rail on low side and 2.66 V on high side at VS = 2.7 V, enabling full dynamic range utilization in 3 V systems. |
| Automotive qualification | AEC-Q100 qualified (Grade 1: −40°C to +125°C), with controlled manufacturing and reliability reporting per automotive requirements. |
| Low input bias current | 1 pA maximum allows direct connection to high-impedance sources (e.g., photodiodes, glass electrodes) without signal degradation. |
| Low noise performance | 8 nV/√Hz voltage noise density at 1 kHz and 1.6 µV p-p (0.1 Hz–10 Hz) preserves resolution in precision analog front-ends. |
| Unity-gain stability | Guaranteed stable with gain ≥1 and 2 kΩ load; no external compensation required for standard buffer or gain-of-two configurations. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current signals from silicon photodiodes in automotive ambient light sensors or rain/light detection modules. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal added noise and offset error. Use Value: 1 pA input bias current prevents diode leakage from dominating signal; 8 nV/√Hz noise maintains >80 dB SNR at 100 kHz bandwidth. |
Use Scenario: Signal conditioning front-end in handheld ECG monitors or portable blood glucose meters operating from coin-cell batteries. IC Role / Device Role / Timing Role: Precision buffer and gain stage before 12-bit SAR ADC, rejecting supply ripple and sensor common-mode noise. Use Value: 0.4 mV typical VOS and 2 µV/°C drift ensure baseline stability over battery discharge and body-temperature variation. |
| Medical Instruments | Portable Audio Devices |
Use Scenario: Low-noise preamplifier in ultrasound Doppler transducer interfaces or EEG electrode amplifiers. IC Role / Device Role / Timing Role: First-stage amplifier with high input impedance and low voltage/current noise to preserve microvolt-level bio-signals. Use Value: 2.5 pF differential input capacitance minimizes peaking in high-gain configurations; 10 MHz GBP supports >100 kHz signal fidelity. |
Use Scenario: Line driver and headphone amplifier in Bluetooth earbuds and voice-controlled wearables powered by 3.7 V Li-ion cells. IC Role / Device Role / Timing Role: Single-supply output buffer delivering rail-to-rail swing into 16 Ω–32 Ω loads with <0.0006% THD+N. Use Value: 5 V/µs slew rate and 1 µs settling time support clean audio reproduction up to 20 kHz without transient distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8691AUJZ-R7 | Same electrical specs and package, but commercial-grade (not AEC-Q100 qualified); 2 µV/°C to 12 µV/°C drift, same 0.4 mV VOS typical. | Not approved for automotive safety-critical modules; suitable for industrial or consumer designs where extended temperature validation is not required. | Select AD8691WAUJZ-R7 when automotive qualification, traceability, and failure-in-time (FIT) data are mandatory. |
| MCP6001T-E/OT | Lower bandwidth (1 MHz), higher offset (1.5 mV typ), higher noise (17 nV/√Hz), but lower quiescent current (100 µA vs. 950 µA). | Targeted at ultra-low-power sensor nodes rather than precision signal chains; lacks automotive qualification and rail-to-rail output drive capability. | Choose MCP6001T-E/OT only for cost-sensitive, low-bandwidth applications where power budget is tighter than noise or accuracy requirements. |
Compared with AD8691AUJZ-R7, the AD8691WAUJZ-R7 adds automotive qualification and tighter production controls without sacrificing performance; versus MCP6001T-E/OT, it trades 8.5× higher supply current for 10× higher bandwidth, 2.1× lower noise, and guaranteed rail-to-rail output drive - essential for precision automotive sensing.
Availability
AD8691WAUJZ-R7 is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical diagnostics, and battery-powered industrial IoT edge nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AD8691WAUJZ-R7 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, headquartered in Wilmington, MA, serving industrial, automotive, communications, and healthcare markets.
The AD869x family was designed specifically for precision, low-noise, single-supply signal conditioning in automotive and portable instrumentation - emphasizing rail-to-rail output, low drift, and robustness across −40°C to +125°C.
FAQ
What is the operating temperature range for AD8691WAUJZ-R7?
The AD8691WAUJZ-R7 is rated for −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements for automotive under-hood and cabin applications. This range is validated across all electrical parameters in the datasheet, including offset voltage, bias current, and output swing, with no derating needed.
Is AD8691WAUJZ-R7 pin-compatible with AD8691AUJZ-R7?
Yes, AD8691WAUJZ-R7 and AD8691AUJZ-R7 share identical 5-lead TSOT (UJ-5) packaging, pinout, and mechanical dimensions. Both use the same ACA branding and occupy identical PCB footprints, enabling drop-in replacement where automotive qualification is added post-design.
Does AD8691WAUJZ-R7 support rail-to-rail input?
No, AD8691WAUJZ-R7 features rail-to-rail *output* only. Its input common-mode range extends to 0.3 V below V– but only to +1.6 V at VS = 2.7 V (or +3.9 V at VS = 5 V), limiting true rail-to-rail input capability. This is sufficient for most single-supply sensor interfaces with proper biasing.
What is the maximum capacitive load AD8691WAUJZ-R7 can drive stably?
AD8691WAUJZ-R7 remains unity-gain stable driving up to 200 pF capacitive load with no external compensation, as verified in Figure 19 and Figure 20 of the datasheet. For loads >200 pF, a series resistor (≥100 Ω) between output and capacitor is recommended to maintain phase margin.
How does the offset voltage drift of AD8691WAUJZ-R7 compare to AD8692W/AD8694W?
AD8691WAUJZ-R7 has a specified offset drift of 2 µV/°C to 12 µV/°C, whereas AD8692W and AD8694W are tighter at 1.3 µV/°C to 6 µV/°C. This reflects process optimization in dual/quad variants; for single-amplifier applications where ultimate drift is critical, AD8691WAUJZ-R7 still meets automotive requirements with 3.0 mV max VOS over temperature.
AD8691WAUJZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 950µA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
AD8691WAUJZ-R7 FAQ
1.How can I place an order for AD8691WAUJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8691WAUJZ-R7 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 AD8691WAUJZ-R7 reliable?
The price and inventory of AD8691WAUJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8691WAUJZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8691WAUJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8691WAUJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8691WAUJZ-R7?
AD8691WAUJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8691WAUJZ-R7 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 AD8691WAUJZ-R7?
For technical support, including AD8691WAUJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8691WAUJZ-R7 requirements.
6.How does Aetrix verify that AD8691WAUJZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8691WAUJZ-R7 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 AD8691WAUJZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8691WAUJZ-R7?
All AD8691WAUJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8691WAUJZ-R7, 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 AD8691WAUJZ-R7 part is unused and in its original packaging.
Return procedure for AD8691WAUJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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