AD8676ARZ - Ultra Precision Dual Op Amp | Analog Devices
MPN: AD8676ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.59 | $3.59 |
| 10 | $3.25 | $32.50 |
| 100 | $2.85 | $285.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
Drop-in alternatives for AD8676ARZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OPA2188
✅ Drop-In📋 Reference alternative (not in catalog)
AD8628ARZ-REEL7
✅ Drop-In✓ In Stock
$1.24 / Unit
View Datasheet →ADA4610-2ARZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →OPA1612
✅ Drop-In📋 Reference alternative (not in catalog)
AD8676ARZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Supply Voltage Range | 5 V to 36 V (single), ±2.5 V to ±18 V (dual) |
| Voltage Noise Density | 2.8 nV/√Hz |
| Input Offset Voltage | 10 µV (max) |
| Input Offset Drift | 0.1 µV/°C |
| Input Bias Current | 0.5 nA (max) |
| Gain Bandwidth Product | 10 MHz |
| Slew Rate | 2.5 V/µs |
| Rail-to-Rail Output | Yes |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 |
| Amplifier Type | Standard (General Purpose) |
AD8676ARZ Pin Configuration
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | -IN A — Inverting input of amplifier A |
| Pin 3 | +IN A — Non-inverting input of amplifier A |
| Pin 4 | V- — Negative supply voltage |
| Pin 5 | +IN B — Non-inverting input of amplifier B |
| Pin 6 | -IN B — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | V+ — Positive supply voltage |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD8676ARZ is suitable for 6 applications: Precision Instrumentation, Medical Devices, Industrial Process Control, Audio Signal Processing, Data Acquisition Systems, Sensor Signal Conditioning.
Precision Instrumentation
The AD8676ARZ's ultralow offset voltage (10 µV max) and low drift (0.1 µV/°C) make it ideal for precision instrumentation such as data acquisition systems and sensor signal conditioning. Its dual-channel configuration allows compact multi-channel designs, and the rail-to-rail output maximizes dynamic range in single-supply systems. The low noise (2.8 nV/√Hz) ensures accurate measurement of small signals, while the wide supply range (5 V to 36 V) accommodates various power rails. In a typical thermocouple amplifier circuit, the AD8676ARZ provides stable gain with minimal error, ensuring high measurement accuracy over temperature.
Recommended
Medical Devices
In medical devices such as ECG and EEG monitors, the AD8676ARZ provides the low noise and high precision required for biopotential signal amplification. Its 2.8 nV/√Hz noise density ensures that small physiological signals are not buried in noise, and the low input bias current (0.5 nA max) minimizes electrode offset errors. The dual-channel design is ideal for multi-lead monitoring, and the extended temperature range (-40°C to +125°C) ensures reliable operation in clinical environments. The rail-to-rail output allows direct interfacing with ADCs, simplifying the signal chain and reducing component count.
Recommended
Industrial Process Control
The AD8676ARZ is well-suited for industrial process control applications such as PLC analog input modules and temperature controllers. Its wide supply voltage range (up to 36 V) allows direct operation from 24 V industrial buses, and the high CMRR and PSRR reject common-mode noise and power supply variations. The low offset drift ensures accurate measurement over the -40°C to +125°C temperature range, critical for outdoor or harsh factory environments. In a 4-20 mA loop transmitter, the AD8676ARZ can buffer the sensor signal with high accuracy, maintaining loop integrity and minimizing calibration requirements.
Recommended
Audio Signal Processing
The AD8676ARZ's low voltage noise (2.8 nV/√Hz) and high bandwidth (10 MHz) make it suitable for high-quality audio signal processing, such as active filters and preamplifiers. The rail-to-rail output allows maximum signal swing, and the low distortion ensures faithful reproduction. In a phono preamp, the AD8676ARZ can amplify the low-level signal from a cartridge with minimal added noise, preserving the dynamic range of the recording. Its dual-channel configuration is ideal for stereo applications, reducing board space and cost compared to using two single op amps.
Recommended
Data Acquisition Systems
In data acquisition systems, the AD8676ARZ serves as a precision buffer or gain stage before an ADC. Its low noise and low offset ensure that the ADC's full resolution is utilized, and the rail-to-rail output allows the signal to span the ADC's input range. The wide bandwidth (10 MHz) supports high-speed sampling, while the low input bias current minimizes errors when driving high-impedance sources. In a multi-channel DAQ, the dual-channel AD8676ARZ can handle two channels per package, reducing component count and PCB area. The device's stability with capacitive loads makes it easy to interface with ADC input capacitors.
Recommended
Sensor Signal Conditioning
The AD8676ARZ is ideal for conditioning signals from various sensors, including thermocouples, strain gauges, and photodiodes. Its low offset voltage and drift ensure accurate amplification of small DC signals, while the low noise preserves signal integrity. The rail-to-rail output allows direct interfacing with ADCs or microcontrollers, simplifying the design. In a strain gauge bridge amplifier, the AD8676ARZ can provide the necessary gain with high common-mode rejection, rejecting noise from the excitation voltage. The wide supply range and industrial temperature range make it suitable for harsh environments.
Recommended
Recommended Products Summary
Engineering reference data for AD8676ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8676ARMZ | OPA2188 | AD8628ARZ-REEL7 | ADA4610-2ARZ | OPA1612 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-MSOP | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Analog Devices | Analog Devices | Texas Instruments |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 8 nV/√Hz | 22 nV/√Hz | 7.3 nV/√Hz | 1.1 nV/√Hz |
| Input Offset Voltage | 10 µV max | 10 µV max | 25 µV max | 5 µV max | 50 µV max | 100 µV max |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 2 MHz | 2.5 MHz | 16.3 MHz | 80 MHz |
| Supply Voltage Range | 5 V to 36 V | 5 V to 36 V | 4.5 V to 36 V | 2.7 V to 5.5 V | ±5 V to ±15 V | ±2.25 V to ±18 V |
| Rail-to-Rail Output | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C |
Key Differentiators
- Ultralow voltage noise of 2.8 nV/√Hz (vs OPA2188)
- Higher bandwidth of 10 MHz (vs OPA2188)
- Lower input offset voltage of 10 µV (vs ADA4610-2ARZ)
Design Notes
For optimal performance, use a low-noise power supply and place 0.1 µF ceramic capacitors close to the V+ and V- pins. Additionally, a 10 µF tantalum capacitor in parallel can help filter low-frequency noise. The AD8676ARZ has a wide supply range, but ensure the supply voltage does not exceed the absolute maximum ratings to avoid damage.
To minimize leakage currents and noise pickup, use a guard ring around the input pins (pins 2, 3, 5, 6) on the PCB. Keep the input traces short and shielded from noisy digital signals. A ground plane under the device is recommended to reduce parasitic capacitance and improve stability.
Avoid driving highly capacitive loads directly, as this can cause instability. If a large load capacitor is necessary, add a small series resistor (e.g., 50 Ω) at the output. Also, ensure the input common-mode voltage stays within the specified range to prevent phase reversal or latch-up.
Compliance Information
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
