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Analog Devices Inc. AD8691AUJZ-REEL7
- Part No.:
- AD8691AUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AD8691AUJZ-REEL7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,916
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Product details
Overview
AD8691AUJZ-REEL7 from Analog Devices is a single, rail-to-rail output, CMOS operational amplifier optimized for low-noise, low-offset, and low-power precision signal conditioning in battery-powered and space-constrained systems. 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. It is widely deployed in photodiode amplification and portable medical instrumentation.
For engineers reviewing the AD8691AUJZ-REEL7 datasheet, AD8691AUJZ-REEL7 pinout, AD8691AUJZ-REEL7 application, or AD8691AUJZ-REEL7 equivalent, key selection criteria include input bias current (≤1 pA), offset drift (≤12 µV/°C), rail-to-rail output swing, SC70/TSOT package compatibility, and −40°C to +125°C automotive-grade temperature operation.
Technical Context
The AD8691AUJZ-REEL7 employs a CMOS input stage enabling femtoampere-level input bias currents and high input impedance, critical for sensor interfacing and photodiode transimpedance configurations. Its rail-to-rail output stage supports full dynamic range utilization with ≤40 mV VOL and ≥2.64 V VOH at 1 mA load under 2.7 V supply.
It features unity-gain stability, 65° phase margin, and 5 V/µs slew rate-enabling accurate amplification of fast-slewing signals without peaking or ringing. The device is specified across −40°C to +125°C and qualified for automotive applications per AEC-Q100 stress testing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V single supply - enables direct integration into Li-ion and 3.3 V/5 V embedded systems without level-shifting. |
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop operation up to ~1 MHz at G = 10 without compensation. |
| Input Bias Current | ≤1 pA max at 25°C - preserves signal integrity in high-impedance sensor nodes and photodiode circuits. |
| Offset Voltage | 0.4 mV typical (2.0 mV max) - reduces DC error in precision instrumentation front-ends without trimming. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - ensures minimal added noise in audio preamps and low-level analog signal chains. |
| Output Swing | Rail-to-rail - delivers >99% of supply rail range at 1 mA load, maximizing ADC input utilization. |
| Operating Temperature | −40°C to +125°C - certified for under-hood automotive and industrial control environments. |
Pinout & Package
AD8691AUJZ-REEL7 is housed in a 5-lead TSOT (UJ-5) package - ultra-compact (2.1 mm × 1.6 mm × 0.6 mm), thermally enhanced surface-mount outline compliant with JEDEC MO-193-AB. Its small footprint enables placement adjacent to sensors to minimize parasitic pickup.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Capable of sourcing/sinking ±20 mA; rail-to-rail swing supports full-scale signal delivery to downstream stages. |
| 2 - V– | Negative supply | Ground reference for single-supply operation; tied to system GND in most configurations. |
| 3 - +IN | Non-inverting input | High-impedance CMOS node (≤1 pA IB); used for reference buffering or non-inverting gain stages. |
| 4 - –IN | Inverting input | High-impedance node; accepts feedback networks for transimpedance, inverting, or differential configurations. |
| 5 - V+ | Positive supply | Accepts 2.7 V to 6 V; PSRR of 95 dB suppresses supply ripple in noisy power domains. |
Key Features
| Feature | Design Value |
|---|---|
| Low input bias current | ≤1 pA max enables direct connection to photodiodes and piezoelectric sensors without leakage-induced error. |
| Rail-to-rail output | Delivers 25 mV from rails at 1 mA load - maximizes dynamic range in 3.3 V systems feeding 12-bit+ ADCs. |
| Low voltage noise | 8 nV/√Hz at 1 kHz - outperforms bipolar op-amps in audio and sensor signal chains where thermal noise dominates. |
| Automotive qualification | AEC-Q100 qualified - meets reliability, ESD, and thermal cycling requirements for automotive cabin and powertrain modules. |
| Wide temperature range | Specified from −40°C to +125°C - eliminates derating concerns in industrial motor drives and outdoor IoT nodes. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximeters and smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to precise voltage with minimal input loading. Use Value: 1 pA input bias current prevents signal attenuation; rail-to-rail output ensures full-scale digitization by low-voltage ADCs. |
Use Scenario: Signal conditioning in handheld multimeters and portable gas analyzers powered by coin cells. IC Role / Device Role / Timing Role: Precision buffer and gain stage for sensor outputs prior to SAR ADC sampling. Use Value: 0.95 mA supply current extends battery life; 400 µV offset minimizes calibration burden in field-deployed units. |
| Medical Instruments | Portable Audio Devices |
Use Scenario: Front-end amplification in ECG electrode interfaces and infusion pump pressure sensors. IC Role / Device Role / Timing Role: Low-noise, high-CMRR amplifier rejecting common-mode interference from AC mains and RF sources. Use Value: 90 dB CMRR at DC and 67 dB at 10 kHz suppresses 50/60 Hz pickup; 125°C rating supports sterilization cycles. |
Use Scenario: Line driver and headphone amplifier in Bluetooth earbuds and voice-controlled speakers. IC Role / Device Role / Timing Role: Unity-gain stable output buffer delivering low-distortion audio (<0.0006% THD+N) to capacitive loads. Use Value: 5 V/µs slew rate handles 20 kHz sine waves cleanly; 8 nV/√Hz noise preserves SNR in 24-bit DAC playback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Lower offset drift (0.1 µV/°C vs. 12 µV/°C), higher quiescent current (17 µA vs. 950 µA), same TSOT-5 package. | Better for ultra-stable DC-coupled systems (e.g., strain gauge bridges); less suitable for wide-temp battery apps due to higher IQ. | Select OPA333AIDBVR when sub-µV/°C drift dominates over power; retain AD8691AUJZ-REEL7 for cost-sensitive, wide-temp, low-noise AC/DC hybrid designs. |
| MCP6001UT-E/OT | Higher input bias current (100 pA vs. 1 pA), lower bandwidth (1 MHz vs. 10 MHz), same SOT-23-5 footprint but not pin-compatible. | Suitable for general-purpose low-power buffering; inadequate for photodiode or high-speed filter applications. | Choose MCP6001UT-E/OT only for non-critical, cost-driven consumer electronics; AD8691AUJZ-REEL7 remains preferred for sensor front-ends requiring pA-level IB and 10 MHz BW. |
Compared with OPA333AIDBVR and MCP6001UT-E/OT, AD8691AUJZ-REEL7 uniquely balances ultra-low input bias current, 10 MHz bandwidth, and automotive-grade temperature capability in a 5-lead TSOT package-making it optimal for space-constrained, high-precision analog signal chains where both speed and DC accuracy matter.
Availability
AD8691AUJZ-REEL7 is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and battery-powered industrial sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8691AUJZ-REEL7 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 Norwood, MA, with design and manufacturing facilities worldwide.
The AD8691AUJZ-REEL7 belongs to Analog Devices' precision CMOS op-amp product line, engineered specifically for low-noise, low-input-bias, rail-to-rail signal conditioning in automotive, medical, and portable instrumentation applications.
FAQ
What is the maximum operating temperature for AD8691AUJZ-REEL7?
The AD8691AUJZ-REEL7 is fully specified and qualified for continuous operation from −40°C to +125°C. This extended industrial temperature range is validated per AEC-Q100 for automotive use and supports deployment in engine control units, industrial motor drives, and outdoor environmental sensors where thermal robustness is critical. The device maintains all key parameters-including offset voltage, CMRR, and bandwidth-within datasheet limits across this full range.
Is AD8691AUJZ-REEL7 pin-compatible with other op-amps in TSOT-5 packages?
No, AD8691AUJZ-REEL7 uses a proprietary 5-lead TSOT (UJ-5) pinout-OUT, V–, +IN, –IN, V+-which differs from standard SOT-23-5 or SC70-5 layouts. While physically similar in size to some TSOT-5 variants, its pin assignment is unique to the AD869x family. Direct replacement requires PCB layout revision unless using an Analog Devices drop-in alternative like AD8691AKSZ-REEL7 (SC70-5, same pinout).
Does AD8691AUJZ-REEL7 support dual-supply operation?
Yes, AD8691AUJZ-REEL7 supports dual-supply operation with total supply voltage up to 6 V (e.g., ±2.5 V or ±1.35 V). The input common-mode range extends to within 0.3 V of either rail, and the rail-to-rail output delivers full swing under dual supplies. Performance metrics-including noise, THD+N, and bandwidth-are characterized under both single- and dual-supply conditions in the official datasheet Rev. F.
What is the typical input offset voltage drift of AD8691AUJZ-REEL7?
The AD8691AUJZ-REEL7 has a maximum input offset voltage drift of 12 µV/°C over −40°C to +125°C, with a typical value of 6 µV/°C. This drift specification applies specifically to the AD8691 variant (as confirmed in Table 1 and Table 2 of Rev. F), distinguishing it from the AD8692/AD8694 family members which specify tighter 6 µV/°C max. The drift directly impacts long-term DC accuracy in uncalibrated systems such as portable blood glucose meters.
Can AD8691AUJZ-REEL7 drive capacitive loads without instability?
AD8691AUJZ-REEL7 is unity-gain stable but exhibits increasing overshoot with capacitive loads above 100 pF, as shown in Figure 18 of the datasheet. For loads >200 pF (e.g., long cables or ADC input filters), external isolation resistance (≥100 Ω) or a small series resistor (20–50 Ω) at the output is recommended. The device's 65° phase margin ensures stability under nominal resistive loads, but capacitive loading must be managed per application-specific transient response requirements.
AD8691AUJZ-REEL7 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:
- 0.2 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 950µA
- Current - Output / Channel:
- 80 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:
- TSOT-23-5
AD8691AUJZ-REEL7 FAQ
1.How can I place an order for AD8691AUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8691AUJZ-REEL7 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 AD8691AUJZ-REEL7 reliable?
The price and inventory of AD8691AUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8691AUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8691AUJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8691AUJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8691AUJZ-REEL7?
AD8691AUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8691AUJZ-REEL7 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 AD8691AUJZ-REEL7?
For technical support, including AD8691AUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8691AUJZ-REEL7 requirements.
6.How does Aetrix verify that AD8691AUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8691AUJZ-REEL7 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 AD8691AUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8691AUJZ-REEL7?
All AD8691AUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8691AUJZ-REEL7, 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 AD8691AUJZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8691AUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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