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Analog Devices Inc. ADA4692-2ARZ
- Part No.:
- ADA4692-2ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4692-2ARZ.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,106
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Product details
Overview
ADA4692-2ARZ from Analog Devices is a dual, rail-to-rail output, low-noise operational amplifier optimized for precision sensor signal conditioning and portable instrumentation. It delivers 3.6 MHz gain bandwidth, 16 nV/√Hz voltage noise density at 1 kHz, 180 μA supply current per amplifier, and 0.5 pA typical input bias current - enabling high-impedance photodiode and pyroelectric sensor interfaces with minimal offset drift (4 μV/°C max) and low THD+N (0.003% typical).
For engineers reviewing the ADA4692-2ARZ datasheet, ADA4692-2ARZ pinout, ADA4692-2ARZ application, or ADA4692-2ARZ equivalent, this page provides verified electrical specifications, SOIC-8 and LFCSP-8 package details, real-world use cases in medical sensors and audio front-ends, and validated alternative op-amps for low-power, low-noise analog signal chains.
Technical Context
The ADA4692-2ARZ employs a CMOS input stage with ultra-low input bias current (0.5 pA typ) and rail-to-rail output swing, supporting single-supply operation from 2.7 V to 5 V or dual ±1.35 V to ±2.5 V. Its 3.6 MHz GBP and 1.3 V/µs slew rate enable stable unity-gain buffering and active filtering up to audio frequencies without phase margin degradation (52° at AV = +1).
Unlike the pin-compatible ADA4691-2, the ADA4692-2ARZ omits shutdown functionality - simplifying biasing and eliminating logic-level dependencies while maintaining identical AC performance, noise, and DC precision across the −40°C to +125°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 3.6 MHz - supports stable closed-loop gain ≥10 up to 360 kHz with adequate phase margin. |
| Input Bias Current | 0.5 pA typical - enables direct connection to >1 GΩ source impedances (e.g., photodiodes) without significant error. |
| Voltage Noise Density | 16 nV/√Hz at 1 kHz - ensures <1 µV RMS integrated noise in 20 kHz audio band with 10 kΩ source impedance. |
| Supply Current per Amp | 180 μA typical at 5 V - allows dual-channel operation on coin-cell batteries for >1 year in always-on sensor nodes. |
| Offset Voltage Drift | 4 μV/°C maximum - limits thermal drift to ≤0.5 mV over full −40°C to +125°C range, critical for uncalibrated industrial sensors. |
| Rail-to-Rail Output | Swings within 30 mV of rails (at 2 kΩ load) - maximizes dynamic range in single-supply systems like portable medical devices. |
| THD + N | 0.003% typical at 1 kHz - meets high-fidelity audio preamp requirements for MP3 players and smartphone line-in stages. |
Pinout & Package
The ADA4692-2ARZ is available in an 8-lead SOIC_N (R-8) package with standard pinout and exposed pad thermal enhancement. Pin 1 is marked by a beveled corner; the exposed pad must be soldered to PCB ground for optimal thermal performance (θJA = 120°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives loads up to ±15 mA with rail-to-rail swing. |
| 2 | –IN A | Inverting input A - high-impedance CMOS node; connects to feedback network or sensor return path. |
| 3 | +IN A | Non-inverting input A - accepts high-Z sensor signals (e.g., thermopile, pH electrode) with negligible loading. |
| 4 | V– | Negative supply rail - ties to GND in single-supply mode; requires low-impedance decoupling. |
| 5 | +IN B | Non-inverting input B - independent channel input; shares no internal circuitry with Channel A. |
| 6 | –IN B | Inverting input B - used for differential sensing or independent signal conditioning path. |
| 7 | OUT B | Inverting amplifier output B - fully isolated from OUT A; supports dual-sensor readout or stereo audio. |
| 8 | V+ | Positive supply rail - accepts 2.7 V to 5 V; bypass with 100 nF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 0.5 pA typical enables direct interfacing with high-impedance sensors (e.g., piezoelectric accelerometers) without guard rings or T-network compensation. |
| Low 1/f noise corner | 3.2 µV p-p (0.1 Hz to 10 Hz) supports precision DC-coupled measurements in weigh scales and strain gauge bridges. |
| High CMRR & PSRR | 98 dB CMRR and 90 dB PSRR at 5 V suppress common-mode interference and supply ripple in noisy industrial environments. |
| Robust ESD protection | ±2 kV HBM rating allows safe handling during PCB assembly without special grounding protocols. |
| Extended temperature range | Specified from −40°C to +125°C ensures reliable operation in automotive cabin modules and outdoor IoT sensor housings. |
Applications
| Photodiode Amplifier | Portable Medical Sensor |
|---|---|
Use Scenario: Converting weak photocurrent from ambient light or pulse oximetry diodes into stable voltage output. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1 GΩ feedback resistor and 16 nV/√Hz noise floor. Use Value: Enables sub-picoamp current resolution and <1% measurement error over 0–100 kLux range in battery-powered wearables. |
Use Scenario: Amplifying low-level bio-signals (ECG, EMG) from dry electrodes in handheld diagnostic tools. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with 0.5 pA IB and rail-to-rail output swing. Use Value: Eliminates external biasing networks and reduces input-referred offset drift to <0.5 mV across body temperature variations. |
| ADC Driver | Active Filter Stage |
Use Scenario: Driving SAR ADC inputs (e.g., AD7980) with fast settling and minimal distortion in data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain buffer with 1.5 µs 0.1% settling time and 0.003% THD+N at 1 kHz. Use Value: Preserves 16-bit ENOB when driving 1 MSPS ADCs without external RC snubbing or gain staging. |
Use Scenario: Implementing 2nd-order low-pass or band-pass filters in audio equalizers and vibration analysis front-ends. IC Role / Device Role / Timing Role: Dual-channel op-amp configured as Sallen-Key topology with 3.6 MHz GBP and 52° phase margin. Use Value: Supports filter cutoff frequencies up to 100 kHz with monotonic response and no peaking under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4691-2ARZ | Identical AC/DC specs but includes dual independent shutdown pins; 10-lead LFCSP or 9-ball WLCSP only - no SOIC option. | Required where power cycling individual amplifiers reduces system standby current below 10 nA. | Select ADA4691-2ARZ only if board layout accommodates LFCSP/WLCSP and shutdown control logic is available. |
| AD8692ARMZ | Higher supply current (520 μA/amp), higher noise (27 nV/√Hz), no guaranteed 125°C operation; same SOIC-8 footprint. | Suitable for cost-sensitive consumer audio where 0.003% THD+N is not required and ambient temperature stays <85°C. | Choose AD8692ARMZ only for non-industrial designs with relaxed noise, drift, and temperature requirements. |
Compared with ADA4691-2ARZ, the ADA4692-2ARZ trades shutdown flexibility for SOIC-8 compatibility and simplified biasing; versus AD8692ARMZ, it delivers 2.9× lower noise, 2.9× lower IB, and guaranteed operation to +125°C - justifying its use in precision medical and industrial edge sensors.
Availability
ADA4692-2ARZ is available at Aetrix Electronics and suitable for photodiode amplification, portable medical sensor front-ends, and precision ADC driver applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4692-2ARZ 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 9001-certified manufacturing.
The ADA469x family was engineered specifically for ultra-low-power, high-precision signal conditioning in battery-operated instrumentation - emphasizing femtoamp input bias, nanovolt noise, and robust operation across −40°C to +125°C.
FAQ
What is the maximum operating supply voltage for the ADA4692-2ARZ?
The ADA4692-2ARZ has an absolute maximum supply voltage rating of 6 V. Operation beyond 5 V is not recommended, as electrical specifications are only guaranteed from 2.7 V to 5 V. Exceeding 6 V risks permanent damage per the Absolute Maximum Ratings table in the Rev. E datasheet.
Does the ADA4692-2ARZ support true rail-to-rail input common-mode range?
No, the ADA4692-2ARZ features rail-to-rail *output* but not rail-to-rail *input*. Its input common-mode voltage range extends to V– − 0.3 V and V+ − 1.1 V (e.g., −0.3 V to +3.9 V at 5 V supply), limiting direct connection to signals at the positive rail without level-shifting.
Can the ADA4692-2ARZ drive a 600 Ω load effectively?
Yes - the ADA4692-2ARZ delivers 2.59 V output high and 103 mV output low into 600 Ω at 5 V supply (25°C), achieving >95% rail utilization. Its ±55 mA short-circuit current capability ensures stability even with transient 600 Ω loads in audio line-driver configurations.
Is the ADA4692-2ARZ pin-compatible with other op-amps in SOIC-8 packages?
The ADA4692-2ARZ uses the industry-standard SOIC-8 pinout (pin 1 = OUT A, pin 2 = –IN A, etc.), matching generic dual op-amp footprints. However, functional compatibility requires verification of input bias, noise, and bandwidth - e.g., it is *not* a drop-in replacement for LM358 due to CMOS input vs. bipolar architecture.
What is the typical input capacitance of the ADA4692-2ARZ?
The ADA4692-2ARZ exhibits 2.5 pF differential-mode and 7 pF common-mode input capacitance per amplifier. This low capacitance minimizes phase shift in high-frequency TIA applications and reduces sensitivity to PCB parasitics in sensitive sensor interfaces.
ADA4692-2ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.3V/µs
- Gain Bandwidth Product:
- 3.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 180µA (x2 Channels)
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADA4692-2ARZ FAQ
1.How can I place an order for ADA4692-2ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4692-2ARZ 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 ADA4692-2ARZ reliable?
The price and inventory of ADA4692-2ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4692-2ARZ is usually 5 days.
3.What payment methods are accepted for ADA4692-2ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4692-2ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4692-2ARZ?
ADA4692-2ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4692-2ARZ 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 ADA4692-2ARZ?
For technical support, including ADA4692-2ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4692-2ARZ requirements.
6.How does Aetrix verify that ADA4692-2ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4692-2ARZ 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 ADA4692-2ARZ meets industry standards.
7.What is the process for return or replacement of ADA4692-2ARZ?
All ADA4692-2ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4692-2ARZ, 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 ADA4692-2ARZ part is unused and in its original packaging.
Return procedure for ADA4692-2ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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