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Analog Devices Inc. AD8694ARUZ-REEL
- Part No.:
- AD8694ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8694ARUZ-REEL.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,911
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Product details
Overview
AD8694ARUZ-REEL from Analog Devices is a quad, rail-to-rail output, CMOS operational amplifier optimized for low-noise, low-distortion, single-supply operation from 2.7 V to 6 V. It delivers 10 MHz gain bandwidth, 5 V/µs slew rate, 8 nV/√Hz voltage noise density at 1 kHz, 0.0006% THD+N at 1 kHz, and 400 µV typical input offset voltage - enabling precision signal conditioning in photodiode amplifiers, portable medical instruments, and battery-powered sensor interfaces.
For engineers reviewing the AD8694ARUZ-REEL datasheet, AD8694ARUZ-REEL pinout, AD8694ARUZ-REEL application, or AD8694ARUZ-REEL equivalent, key selection criteria include its quad-channel RRO architecture, −40°C to +125°C automotive-grade temperature range, 14-lead TSSOP package, low 0.95 mA/amplifier supply current, and guaranteed 6 µV/°C max offset drift - critical for stable DC-coupled front ends in industrial and automotive systems.
Technical Context
The AD8694ARUZ-REEL employs a CMOS input stage delivering 1 pA maximum input bias current and 5 pF common-mode input capacitance, supporting high-impedance sensor interfacing without significant loading. Its rail-to-rail output swing (within 25 mV of rails at 1 mA load) and unity-gain stability enable direct connection to ADC inputs and low-voltage logic without level-shifting circuitry.
Specified across −40°C to +125°C with 6 µV/°C max offset drift (AD8692/AD8694), it maintains precision in thermally demanding environments. The device achieves 60 dB minimum CMRR and 75 dB minimum PSRR over temperature, ensuring robust performance in noisy power domains typical of automotive and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop operation up to 10× gain at 1 MHz or unity gain at 10 MHz. |
| Slew Rate | 5 V/µs - enables accurate reproduction of fast transient signals up to ~1.6 MHz full-power sine waves. |
| Input Offset Voltage | 0.4 mV typical - reduces DC error in precision gain stages and active filters without trimming. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - minimizes contribution to system noise floor in low-level analog signal chains. |
| Supply Current per Amplifier | 0.95 mA typical at 5 V - allows four independent channels in space-constrained, battery-operated designs. |
| Output Swing (1 mA load) | Within 25 mV of rails - ensures maximum dynamic range when interfacing with 3.3 V or 5 V ADCs. |
| Offset Drift | 6 µV/°C max - limits thermal-induced DC drift to <0.6 mV over 100°C ambient range. |
| THD + Noise | 0.0006% at 1 kHz - preserves signal fidelity in audio and measurement applications requiring high SFDR. |
Pinout & Package
The AD8694ARUZ-REEL is housed in a 14-lead TSSOP (RU-14) package, 5.0 mm × 4.4 mm × 1.2 mm, compliant with JEDEC MO-153-AB-1. Pin 1 is marked by a dot; the package features gull-wing leads and 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of Amplifier A - high-impedance node (1 pA max IB) for feedback network connection. |
| 2 | +IN A | Non-inverting input of Amplifier A - accepts high-Z sensor or reference signals with minimal loading. |
| 3 | V+ | Positive supply rail - accepts 2.7 V to 6 V single supply; decoupling required within 1 cm. |
| 4 | OUT B | Output of Amplifier B - rail-to-rail capable, drives loads down to 2 kΩ while maintaining linearity. |
| 5 | −IN B | Inverting input of Amplifier B - electrically isolated from other channels; supports independent feedback paths. |
| 6 | +IN B | Non-inverting input of Amplifier B - matched to +IN A for consistent common-mode behavior across channels. |
| 7 | OUT A | Output of Amplifier A - identical AC/DC specs to OUT B; channel separation >120 dB at 1 kHz. |
| 8 | V− | Negative supply rail (GND in single-supply config) - return path for all four amplifiers' quiescent current. |
| 9 | OUT D | Output of Amplifier D - fully specified for same drive strength and noise as OUT A/B/C. |
| 10 | +IN D | Non-inverting input of Amplifier D - matches input capacitance (2.5 pF diff, 5 pF common-mode) of other channels. |
| 11 | V− | Shared negative supply terminal - must be low-impedance; no separate ground pins per channel. |
| 12 | OUT C | Output of Amplifier C - supports simultaneous multi-channel signal processing without crosstalk degradation. |
| 13 | −IN C | Inverting input of Amplifier C - referenced to same V− as all channels; layout symmetry recommended. |
| 14 | +IN C | Non-inverting input of Amplifier C - pin-compatible with +IN A/B/D for standardized PCB routing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range into 3.3 V or 5 V ADCs without external level-shifting components. |
| Low 1 pA max input bias current | Enables use with high-impedance sources (e.g., pH electrodes, photodiodes) without significant signal attenuation. |
| 10 MHz bandwidth with unity-gain stability | Supports wideband filtering, active anti-aliasing, and fast-settling multipole configurations without compensation. |
| Automotive-grade temperature range | Qualified from −40°C to +125°C per AEC-Q100 requirements, suitable for under-hood and infotainment systems. |
| Low 0.0006% THD+N | Maintains signal integrity in audio preamps and precision waveform generation where harmonic distortion must be minimized. |
| 8 nV/√Hz voltage noise density | Reduces integrated noise in sensor front ends, improving SNR in sub-mV signal amplification paths. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Converting weak current from silicon photodiodes in portable pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with low input bias current and low voltage noise to maximize signal-to-noise ratio. Use Value: 1 pA max input bias current prevents diode leakage from dominating signal current; 8 nV/√Hz noise ensures detection of sub-nA photocurrents. |
Use Scenario: Signal conditioning in handheld multimeters, portable gas analyzers, or wearable ECG monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage and buffer before SAR ADC sampling. Use Value: 0.4 mV typical offset and 6 µV/°C max drift minimize calibration frequency; 0.95 mA/amplifier extends battery life across four channels. |
| Medical Instruments | Portable Audio Devices |
Use Scenario: Front-end amplification in portable ultrasound Doppler units or infusion pump pressure sensing. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier driver for differential ADC inputs. Use Value: 60 dB min CMRR rejects common-mode interference from switching power supplies; rail-to-rail output maximizes ADC utilization. |
Use Scenario: Line-level preamplification and headphone driver in Bluetooth speakers or voice-controlled assistants. IC Role / Device Role / Timing Role: Unity-gain stable audio op-amp for active filters and output buffering. Use Value: 0.0006% THD+N preserves audio fidelity; 10 MHz GBW supports ultrasonic content and steep filter roll-offs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9064IDR | Lower 6.5 nV/√Hz noise but higher 1.2 mA/amplifier supply current; 18 MHz GBW vs. 10 MHz. | Better for wideband active filters; less suitable for ultra-low-power battery systems. | Select TLV9064IDR when bandwidth >10 MHz is required and power budget allows +26% per channel. |
| OPA491IDR | Higher 12 nV/√Hz noise but superior 1.2 µV/°C max offset drift and 1.2 pA max IB at 125°C. | Preferred for long-term DC stability in uncalibrated field-deployed sensors. | Choose OPA491IDR when drift-critical applications outweigh noise sensitivity, especially above 85°C. |
Compared with TLV9064IDR and OPA491IDR, AD8694ARUZ-REEL offers the best balance of low noise (8 nV/√Hz), low power (0.95 mA), and automotive qualification - making it optimal for cost-sensitive, battery-constrained, and thermally demanding precision analog front ends.
Availability
AD8694ARUZ-REEL is available at Aetrix Electronics and suitable for photodiode amplification, battery-powered instrumentation, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8694ARUZ-REEL 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.
The AD869x family was designed specifically for precision, low-power, rail-to-rail signal conditioning in space- and energy-constrained applications - including automotive sensor interfaces, portable diagnostics, and industrial IoT edge nodes.
FAQ
What is the operating temperature range for AD8694ARUZ-REEL?
The AD8694ARUZ-REEL is rated for operation from −40°C to +125°C, meeting extended industrial and automotive-grade requirements. This range is validated per AEC-Q100 for the W-grade variants, and the AD8694ARUZ-REEL shares identical thermal specifications and reliability testing protocols as the qualified automotive models.
Does AD8694ARUZ-REEL support true rail-to-rail input?
No, AD8694ARUZ-REEL features rail-to-rail *output* only. Its input common-mode voltage range extends from −0.3 V to V+ − 1.1 V (at 5 V supply), meaning it does not accept signals at the positive rail. For true rail-to-rail input capability, consider alternatives like the ADA4091-4, which is not pin-compatible with AD8694ARUZ-REEL.
What is the maximum capacitive load AD8694ARUZ-REEL can drive stably?
AD8694ARUZ-REEL remains unity-gain stable with capacitive loads up to 15 pF, as confirmed in Figure 14 of the Rev. F datasheet. Driving larger loads (e.g., >100 pF cables or ADC input capacitance) requires isolation resistance (≥500 Ω) in series with the output to maintain phase margin above 60°.
Is AD8694ARUZ-REEL RoHS compliant and lead-free?
Yes, AD8694ARUZ-REEL is RoHS compliant and lead-free. Per the Ordering Guide (Page 14), the "Z" suffix denotes RoHS-compliant packaging. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for standard surface-mount assembly.
How does the channel separation performance of AD8694ARUZ-REEL impact multi-channel designs?
AD8694ARUZ-REEL provides ≥120 dB channel separation at 1 kHz (Figure 26), minimizing crosstalk between adjacent amplifiers. This enables simultaneous use of all four channels in mixed-signal applications - such as multi-electrode biosensors or quad-channel data acquisition - without measurable inter-channel interference below −120 dBFS.
AD8694ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 950µA (x4 Channels)
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8694ARUZ-REEL FAQ
1.How can I place an order for AD8694ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8694ARUZ-REEL 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 AD8694ARUZ-REEL reliable?
The price and inventory of AD8694ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8694ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8694ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8694ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8694ARUZ-REEL?
AD8694ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8694ARUZ-REEL 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 AD8694ARUZ-REEL?
For technical support, including AD8694ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8694ARUZ-REEL requirements.
6.How does Aetrix verify that AD8694ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8694ARUZ-REEL 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 AD8694ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8694ARUZ-REEL?
All AD8694ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8694ARUZ-REEL, 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 AD8694ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD8694ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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