AD8674ARZ-REEL7 - Quad Precision Low Noise Op Amp | Analog Devices
MPN: AD8674ARZ-REEL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.35 | $8.35 |
| 10 | $7.52 | $75.20 |
| 100 | $6.68 | $668.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.02 | $5,020.00 |
AD8674ARZ-REEL7 Overview
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog electronics, used in signal conditioning, filtering, and instrumentation. The AD8674 is a precision op amp, meaning it prioritizes accuracy parameters such as low offset voltage, low noise, and low drift over raw speed, making it suitable for measurement and control systems.
Key features of the AD8674 include a low input offset voltage of 30 µV (max), a low input bias current of 1 nA (max), and a low noise density of 2.8 nV/√Hz at 1 kHz. The amplifier operates from a supply voltage range of ±2.5 V to ±15 V, and its output is stable with capacitive loads exceeding 1000 pF. The quiescent current per amplifier is 3.2 mA, contributing to low power consumption.
The AD8674 uses a bipolar process technology that achieves excellent DC precision without the need for chopping or auto-zeroing. The input stage is designed for low offset and drift, while the output stage can drive capacitive loads without oscillation. The device also features a wide common-mode input range and high open-loop gain, ensuring accurate amplification in closed-loop configurations.
Typical applications include precision instrumentation, data acquisition systems, active filters, and sensor signal conditioning. The quad configuration allows compact designs where multiple amplifiers are needed, such as in multi-channel data acquisition or medical monitoring equipment. The low noise and low offset make it ideal for amplifying small signals from sensors like thermocouples or strain gauges.
When designing with the AD8674, ensure proper power supply decoupling with 0.1 µF capacitors close to the supply pins. The input common-mode voltage should stay within the specified range to avoid distortion. For best noise performance, use low-value resistors in the feedback network and keep the circuit board layout compact to minimize parasitic capacitance.
Drop-in alternatives for AD8674ARZ-REEL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD8674ARZ-REEL7 (same form factor and footprint) — differing in Amplifier Type, Capacitive Load Stability, Input Bias Current, Input Offset Voltage, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD8674ARZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →OPA4277
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
OPA4227
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1114
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD8674ARZ-REEL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Gain Bandwidth Product | 10 MHz |
| Slew Rate | 4 V/µs |
| Input Offset Voltage | 30 µV (max) |
| Input Bias Current | 1 nA (max) |
| Voltage Noise Density | 2.8 nV/√Hz at 1 kHz |
| Supply Voltage Range | ±2.5 V to ±15 V |
| Quiescent Current per Amplifier | 3.2 mA |
| Capacitive Load Stability | >1000 pF |
| Operating Temperature Range | -40°C to +125°C |
| Package | 14-SOIC |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Amplifier Type | Standard (General Purpose) |
| Output Type | Rail-to-Rail Output |
AD8674ARZ-REEL7 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 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 | 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 voltage |
| 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 |
Typical Applications
AD8674ARZ-REEL7 is suitable for 6 applications: Precision Instrumentation, Data Acquisition Systems, Active Filters, Sensor Signal Conditioning, Audio Signal Processing, Medical Monitoring.
Precision Instrumentation
The AD8674ARZ-REEL7's low offset voltage (30 µV max) and low noise (2.8 nV/√Hz) make it ideal for precision instrumentation amplifiers. In a typical bridge amplifier circuit, the quad configuration allows for a complete instrumentation amplifier using three op amps, with the fourth available for filtering or buffering. The low drift ensures accurate measurements over temperature, making it suitable for laboratory equipment and industrial process control.
Recommended
Data Acquisition Systems
In data acquisition systems, the AD8674ARZ-REEL7 provides signal conditioning for analog-to-digital converters. Its low noise and high bandwidth (10 MHz) preserve signal integrity, while the quad configuration reduces component count. The amplifier can drive the input of a SAR ADC like the AD7606 directly, with the output stable for capacitive loads. This makes it suitable for industrial automation, test and measurement, and medical monitoring.
Recommended
Active Filters
The AD8674ARZ-REEL7 is well-suited for active filter designs, such as low-pass, high-pass, and band-pass filters. Its 10 MHz gain bandwidth product allows for filter cutoff frequencies up to several hundred kHz, while the low noise ensures minimal added noise. The quad configuration enables multi-stage filters like Butterworth or Chebyshev designs in a single package. The amplifier's high open-loop gain ensures accurate filter response.
Recommended
Sensor Signal Conditioning
The AD8674ARZ-REEL7 is ideal for conditioning signals from sensors such as thermocouples, strain gauges, and photodiodes. Its low input bias current (1 nA max) minimizes errors when interfacing with high-impedance sensors. The low offset voltage and drift ensure accurate DC measurement. The quad configuration allows for multiple sensor channels in a compact design, making it suitable for industrial and medical applications.
Recommended
Audio Signal Processing
The AD8674ARZ-REEL7's low noise (2.8 nV/√Hz) and high bandwidth (10 MHz) make it suitable for audio applications such as preamplifiers and active crossovers. The low distortion and high slew rate (4 V/µs) ensure clean amplification of audio signals. The quad configuration allows for multi-channel audio processing, such as in mixing consoles or surround sound systems. The amplifier can drive headphones or line-level outputs directly.
Recommended
Medical Monitoring
In medical monitoring equipment, the AD8674ARZ-REEL7 provides precise amplification of bio-signals such as ECG and EEG. Its low noise and low offset are critical for detecting small physiological signals. The low power consumption (3.2 mA per amplifier) is suitable for battery-powered devices. The quad configuration allows for multi-lead ECG monitoring in a single IC, reducing board space and improving reliability.
Recommended
Recommended Products Summary
Engineering reference data for AD8674ARZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8674ARZ | AD8674ARUZ | OPA4277 | OPA4227 | LT1114 |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-TSSOP | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 8 MHz | 4.5 MHz |
| Slew Rate | 4 V/µs | 4 V/µs | 4 V/µs | 2.8 V/µs | 2.3 V/µs | 0.2 V/µs |
| Input Offset Voltage | 30 µV (max) | 30 µV (max) | 20 µV (max) | 20 µV (max) | 50 µV (max) | 60 µV (max) |
| Input Bias Current | 1 nA (max) | 1 nA (max) | 1 nA (max) | 1 nA (max) | 2.5 nA (max) | 0.25 nA (max) |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 2.8 nV/√Hz | 8 nV/√Hz | 3 nV/√Hz | 12 nV/√Hz |
Key Differentiators
- Lower noise than OPA4277 (vs OPA4277)
- Higher slew rate than OPA4227 (vs OPA4227)
- Lower offset voltage than LT1114 (vs LT1114)
Design Notes
Ensure proper power supply decoupling by placing 0.1 µF ceramic capacitors close to the V+ and V- pins. Additionally, use 10 µF tantalum or electrolytic capacitors at the power entry point to filter low-frequency noise. This is critical for maintaining the low noise performance of the AD8674.
For optimal noise performance, keep the feedback network resistors low in value (e.g., 1 kΩ to 10 kΩ) to minimize thermal noise. Use a ground plane to reduce noise pickup, and keep the input traces short and shielded if possible. Avoid routing high-speed digital signals near the amplifier inputs.
Do not exceed the absolute maximum supply voltage of ±18 V. Also, ensure the input common-mode voltage stays within the specified range to avoid output phase reversal. When driving capacitive loads, verify stability with the actual load capacitance, as the AD8674 is stable up to 1000 pF but may require a series resistor for larger loads.
Compliance Information
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
