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Analog Devices Inc. AD8694ARZ-REEL7
- Part No.:
- AD8694ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8694ARZ-REEL7.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,913
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Product details
Overview
AD8694ARZ-REEL7 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, 400 µV typical offset voltage, and 6 µV/°C max offset drift - enabling precision signal conditioning in photodiode amplifiers, portable medical instruments, and battery-powered sensor interfaces.
For engineers reviewing the AD8694ARZ-REEL7 datasheet, AD8694ARZ-REEL7 pinout, AD8694ARZ-REEL7 application, or AD8694ARZ-REEL7 equivalent, key selection criteria include its quad-channel RRO architecture, −40°C to +125°C automotive-grade temperature range, 14-lead SOIC_N package, and verified performance in low-power, high-impedance analog front-ends requiring <0.0006% THD+N and rail-to-rail output swing.
Technical Context
The AD8694ARZ-REEL7 implements a CMOS input stage with 1 pA max input bias current and 2.5 pF differential input capacitance, supporting high-impedance sensor interfacing without significant loading. Its unity-gain stable architecture features 65° phase margin at 5 V supply and maintains 10 MHz GBP across −40°C to +125°C.
It operates as a true rail-to-rail output device with VOL ≤ 40 mV and VOH ≥ 4.96 V at IL = 1 mA (VS = 5 V), and supports full-swing operation down to 2.7 V supply while delivering 0.01% settling in 1 µs - critical for multipole active filters and fast-settling instrumentation amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz - enables stable unity-gain operation and supports closed-loop bandwidths up to ~9 MHz in non-inverting configurations. |
| Input Offset Voltage | 0.4 mV min / 2.0 mV typ - ensures ≤2 mV DC error in precision transimpedance or differential amplification stages. |
| Offset Voltage Drift | 1.3–6 µV/°C - guarantees <0.6 mV total offset shift over full −40°C to +125°C range, suitable for automotive sensor signal chains. |
| Voltage Noise Density | 8 nV/√Hz @ 1 kHz - provides low-noise amplification for photodiode and piezoelectric sensor outputs without dominating system noise floor. |
| Supply Current per Amplifier | 0.95 mA typ @ 5 V - allows four independent channels to operate within 3.8 mA total, ideal for space-constrained portable instrumentation. |
| Output Swing (RL = 2 kΩ) | VOL ≤ 40 mV, VOH ≥ 4.96 V @ 5 V - achieves >99% rail utilization, simplifying level-shifting and ADC driver design in single-supply systems. |
| Total Harmonic Distortion + Noise | 0.0006% @ 1 kHz - meets audio-grade fidelity requirements in portable audio preamps and active filter stages. |
Pinout & Package
AD8694ARZ-REEL7 is housed in a 14-lead narrow-body SOIC (R-14) package compliant with JEDEC MS-012-AB, measuring 8.75 mm × 4.00 mm × 1.75 mm with 1.27 mm lead pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of Channel A - high-impedance CMOS node (1 pA max IB) for precision feedback network connection. |
| 2 | +IN A | Non-inverting input of Channel A - matched to Pin 1 for common-mode rejection; accepts signals from −0.3 V to +3.9 V at 5 V supply. |
| 3 | V+ | Positive supply rail - supports 2.7 V to 6 V operation; decoupling capacitor required near this pin for stability. |
| 4 | OUT B | Output of Channel B - rail-to-rail capable (VOL ≤ 40 mV, VOH ≥ 4.96 V), drives loads ≥2 kΩ directly. |
| 5 | −IN B | Inverting input of Channel B - electrically identical to Pin 1; isolated from other channels by >140 dB channel separation at 1 kHz. |
| 6 | +IN B | Non-inverting input of Channel B - matches Pin 2; shares same input voltage range and bias current specs. |
| 7 | OUT A | Output of Channel A - fully interchangeable with Pin 4 in layout; supports 10 mA sink/source capability. |
| 8 | V− | Negative supply rail (GND in single-supply use) - reference for all inputs and outputs; requires low-impedance ground plane. |
| 9 | OUT D | Output of Channel D - identical AC/DC performance to Pins 4 and 7; enables independent control of four analog paths. |
| 10 | −IN D | Inverting input of Channel D - part of quad-isolated input structure; no crosstalk impact on Channels A/B/C per Figure 26. |
| 11 | +IN D | Non-inverting input of Channel D - matches input specs of Pins 2 and 6; supports same common-mode range and noise immunity. |
| 12 | V− | Shared negative supply rail - connects internally to Pin 8; must be tied to system GND or negative rail. |
| 13 | +IN C | Non-inverting input of Channel C - completes quad input set; validated for −40°C to +125°C operation per Table 1/2. |
| 14 | −IN C | Inverting input of Channel C - symmetric to Pin 10; enables matched differential pair implementation across all four channels. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ≥4.96 V high and ≤40 mV low output at 5 V supply and 1 mA load - eliminates need for level-shifting in 3.3 V/5 V microcontroller interfaces. |
| Low input bias current (1 pA max) | Enables direct connection to high-impedance sources like photodiodes and pH electrodes without signal attenuation or drift. |
| Automotive-grade qualification | Specified and tested over −40°C to +125°C with controlled manufacturing - meets AEC-Q100 stress test requirements for under-hood applications. |
| 10 MHz bandwidth with unity-gain stability | Supports wideband filtering, active anti-aliasing, and fast-settling data acquisition without external compensation components. |
| 0.0006% THD+N at 1 kHz | Preserves signal integrity in audio preamplifiers and precision waveform generation where harmonic distortion must remain below audible thresholds. |
| Quad-channel integration in SOIC | Reduces PCB area by 75% vs. discrete single-amplifier solutions - lowers component count and interconnect noise in multi-sensor systems. |
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 with 1 pA input bias current and 8 nV/√Hz noise density to maximize SNR at low photocurrent levels. Use Value: Enables detection of sub-nA photocurrents with <10 µV RMS noise floor in 10 kHz bandwidth - critical for clinical-grade optical sensing. |
Use Scenario: Signal conditioning front-end in handheld multimeters or portable gas analyzers operating from coin-cell batteries. IC Role / Device Role / Timing Role: Quad-channel buffer, gain stage, and reference driver supporting simultaneous voltage, current, and temperature measurements. Use Value: 0.95 mA per amplifier allows four channels to run <4 mA total, extending battery life beyond 100 hours on CR2032 cells. |
| Medical Instruments | Multipole Filters |
Use Scenario: Low-noise amplification in ECG electrode interfaces and portable ultrasound beamforming circuits. IC Role / Device Role / Timing Role: Precision instrumentation amplifier input stage with 6 µV/°C max offset drift to maintain calibration stability across body-temperature variations. Use Value: <0.6 mV total offset shift over −40°C to +125°C eliminates recalibration cycles in field-deployed diagnostic devices. |
Use Scenario: Implementing 4th-order Sallen-Key or state-variable filters in audio equalizers and anti-aliasing modules. IC Role / Device Role / Timing Role: Unity-gain stable op-amp with 10 MHz GBP and 65° phase margin to sustain filter Q-factor and passband flatness without peaking. Use Value: Achieves <0.1 dB passband ripple in 20 kHz audio filters using standard RC networks - no custom compensation required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP484ESZ-REEL7 | Higher supply current (1.5 mA/amplifier), wider supply range (±2.5 V to ±15 V), lower noise (4.3 nV/√Hz), but no automotive qualification. | Better suited for dual-supply industrial control systems requiring higher output drive and lower noise; not rated for −40°C to +125°C automotive use. | Select OP484ESZ-REEL7 when dual-supply operation and ultra-low noise outweigh automotive qualification and power efficiency needs. |
| TLV2464CDR | Lower bandwidth (6.4 MHz), higher offset (2.5 mV max), higher supply current (650 µA typ), but lower cost and same SOIC-14 package. | Acceptable for cost-sensitive consumer-grade sensor interfaces where 10 MHz bandwidth and <0.5 mV offset are not required. | Choose TLV2464CDR only for non-automotive, non-medical applications where budget constraints dominate performance requirements. |
Compared with OP484ESZ-REEL7 and TLV2464CDR, AD8694ARZ-REEL7 uniquely balances automotive qualification, 10 MHz bandwidth, 8 nV/√Hz noise, and 0.95 mA quiescent current in a single SOIC-14 package - making it the optimal choice for safety-critical, battery-limited, and thermally demanding embedded analog systems.
Availability
AD8694ARZ-REEL7 is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instruments, and battery-powered instrumentation requiring stable component supply across automotive and industrial temperature ranges.
Supply support for AD8694ARZ-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 centers worldwide and ISO/TS 16949-certified manufacturing.
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 high-fidelity audio front-ends.
FAQ
What is the operating temperature range for AD8694ARZ-REEL7?
The AD8694ARZ-REEL7 is specified for continuous operation from −40°C to +125°C, meeting extended industrial and automotive-grade reliability requirements. This range is validated per the Electrical Characteristics tables in Rev. F datasheet, with parameters such as offset voltage drift (≤6 µV/°C) and supply current (≤1.3 mA per amplifier) guaranteed across the full span.
Does AD8694ARZ-REEL7 support true rail-to-rail output?
Yes, AD8694ARZ-REEL7 provides rail-to-rail output swing: at VS = 5 V and IL = 1 mA, VOH ≥ 4.96 V and VOL ≤ 40 mV. This is confirmed in Table 2 of the datasheet under Output Characteristics, enabling direct interfacing with 3.3 V or 5 V ADCs and microcontrollers without external level-shifting circuitry.
Is AD8694ARZ-REEL7 qualified for automotive applications?
No - AD8694ARZ-REEL7 is the commercial-grade version. Automotive qualification applies only to models with "W" suffix (e.g., AD8694WARUZ-REEL). The AD8694ARZ-REEL7 is rated for −40°C to +125°C but lacks AEC-Q100 stress testing and controlled manufacturing documentation required for automotive use.
What is the maximum capacitive load AD8694ARZ-REEL7 can drive stably?
AD8694ARZ-REEL7 remains stable driving up to 200 pF capacitive load with no external compensation, as shown in Figure 19 (Small Signal Transient Response) and Figure 20 (Large Signal Transient Response) of the datasheet. For loads >200 pF, a series resistor (≥10 Ω) between output and capacitance is recommended to maintain phase margin.
How does the input bias current of AD8694ARZ-REEL7 compare to bipolar-input op-amps?
AD8694ARZ-REEL7 specifies 0.2–1 pA max input bias current at 25°C - over 1,000× lower than typical bipolar-input op-amps (e.g., LM324: ~45 nA). This enables accurate amplification of nanoamp-level sensor currents (e.g., photodiodes, ion-selective electrodes) without significant input error voltage across feedback resistors.
AD8694ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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-SOIC
AD8694ARZ-REEL7 FAQ
1.How can I place an order for AD8694ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8694ARZ-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 AD8694ARZ-REEL7 reliable?
The price and inventory of AD8694ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8694ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8694ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8694ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8694ARZ-REEL7?
AD8694ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8694ARZ-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 AD8694ARZ-REEL7?
For technical support, including AD8694ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8694ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8694ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8694ARZ-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 AD8694ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8694ARZ-REEL7?
All AD8694ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8694ARZ-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 AD8694ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8694ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8694ARZ-REEL7 Tags
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