AD8674ARZ - Quad Precision Low Noise Op Amp | Analog Devices
MPN: AD8674ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.82 | $4.82 |
| 10 | $4.35 | $43.50 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for AD8674ARZ — 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:
AD8674AR
✅ Drop-In📋 Reference alternative (not in catalog)
AD8674BRZ
✅ Drop-In✓ In Stock
$3.09 / Unit
View Datasheet →OP4177ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
OPA4277UA
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4077-4ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD8674ARZ Maximum Ratings & Electrical Characteristics
| Amplifier Type | General Purpose |
| Number of Circuits | 4 |
| Gain Bandwidth Product | 10 MHz |
| Slew Rate | 4 V/µs |
| Supply Voltage Range | ±5 V to ±15 V |
| Input Offset Voltage | 10 µV (typical) |
| Input Bias Current | 1.5 nA (typical) |
| Input Voltage Noise Density | 2.8 nV/√Hz |
| Open-Loop Gain | 126 dB |
| Common-Mode Rejection Ratio | 120 dB |
| Capacitive Load Stability | 1000 pF |
| Quiescent Current (per amp) | 2.5 mA |
| Operating Temperature Range | -40°C to +125°C |
| Package | 14-SOIC |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD8674ARZ 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+ — Positive supply |
| 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 | OUT C — Output of amplifier C |
| Pin 9 | -IN C — Inverting input of amplifier C |
| Pin 10 | +IN C — Non-inverting input of amplifier C |
| Pin 11 | V- — Negative supply |
| Pin 12 | +IN D — Non-inverting input of amplifier D |
| Pin 13 | -IN D — Inverting input of amplifier D |
| Pin 14 | OUT D — Output of amplifier D |
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
AD8674ARZ is suitable for 6 applications: Precision Data Acquisition Systems, Medical Instrumentation, Industrial Process Control, Active Filters, Audio Signal Processing, Test and Measurement Equipment.
Precision Data Acquisition Systems
The AD8674ARZ's low noise (2.8 nV/√Hz) and low offset voltage (10 µV) make it ideal for signal conditioning in data acquisition systems. It can buffer and amplify sensor signals before ADC conversion, ensuring high accuracy. The quad configuration allows multiple channels to be processed in a single IC, reducing board space and cost. Its high open-loop gain (126 dB) and CMRR (120 dB) reject common-mode noise, improving system performance.
Recommended
Medical Instrumentation
In medical devices like ECG and EEG monitors, the AD8674ARZ provides low-noise amplification of bio-potential signals. Its low input bias current (1.5 nA) minimizes loading on high-impedance electrodes, and its low offset voltage reduces baseline drift. The wide temperature range (-40°C to +125°C) ensures reliability in clinical environments. The quad package enables multi-channel monitoring in a compact form factor.
Recommended
Industrial Process Control
The AD8674ARZ is well-suited for industrial process control loops, where it amplifies signals from sensors like thermocouples and RTDs. Its high CMRR (120 dB) rejects interference from motors and power lines, while its low noise ensures accurate measurement. The device operates from ±15V supplies, common in industrial systems, and its robust design handles harsh conditions. The quad configuration allows multiple control loops to be implemented efficiently.
Recommended
Active Filters
The AD8674ARZ's 10 MHz bandwidth and 4 V/µs slew rate make it suitable for active filter designs, such as low-pass and band-pass filters in communication systems. Its low noise and distortion preserve signal quality, while its stability with capacitive loads allows direct driving of filter capacitors. The quad package enables multi-stage filters in a single IC, simplifying design and reducing component count.
Recommended
Audio Signal Processing
In professional audio equipment, the AD8674ARZ provides low-noise amplification for mixing consoles and equalizers. Its 2.8 nV/√Hz noise floor is low enough for high-fidelity audio, and its low distortion ensures transparent signal reproduction. The device operates from ±15V supplies, typical in audio gear, and its quad configuration allows multiple audio channels to be processed in one IC, reducing cost and board space.
Recommended
Test and Measurement Equipment
The AD8674ARZ is used in test and measurement instruments like oscilloscopes and multimeters, where precision and low noise are critical. Its high open-loop gain and low offset voltage ensure accurate signal measurement, while its wide bandwidth supports high-frequency signals. The quad configuration allows multiple measurement channels to be implemented compactly, and its industrial temperature range ensures reliable operation in lab and field environments.
Recommended
Recommended Products Summary
Engineering reference data for AD8674ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8674AR | AD8674BRZ | OP4177ARZ | OPA4277UA | ADA4077-4ARZ |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 1 MHz | 3.9 MHz |
| Slew Rate | 4 V/µs | 4 V/µs | 4 V/µs | 2.5 V/µs | 0.8 V/µs | 1.2 V/µs |
| Input Offset Voltage (max) | 75 µV | 75 µV | 50 µV | 50 µV | 50 µV | 25 µV |
| Input Bias Current (max) | 2 nA | 2 nA | 2 nA | 2 nA | 2 nA | 1.5 nA |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 2.8 nV/√Hz | 3.8 nV/√Hz | 8 nV/√Hz | 2.2 nV/√Hz |
Key Differentiators
- Lower input voltage noise (2.8 nV/√Hz) compared to OP4177ARZ (3.8 nV/√Hz) (vs OP4177ARZ)
- Higher slew rate (4 V/µs) vs OPA4277UA (0.8 V/µs) (vs OPA4277UA)
- Wider bandwidth (10 MHz) vs ADA4077-4ARZ (3.9 MHz) (vs ADA4077-4ARZ)
Design Notes
Use 0.1 µF ceramic capacitors close to each supply pin (V+ and V-) to decouple high-frequency noise. Additionally, a 10 µF tantalum capacitor on each supply rail can help maintain stability during transient load changes. Proper decoupling is critical for achieving the low noise performance specified in the datasheet.
For optimal noise performance, keep the input traces short and shielded from digital signals. Use a ground plane under the op amp to minimize parasitic capacitance and noise pickup. Avoid routing high-frequency digital lines near the input pins, as this can couple noise into the amplifier.
Do not exceed the absolute maximum supply voltage of ±18V. Also, ensure the input common-mode voltage stays within the specified range to avoid phase reversal. When driving capacitive loads, verify stability with the actual load capacitance, as the 1000 pF stability is typical but may vary with supply voltage and temperature.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free finish indicated by 'Z' suffix.
