AD8674ARZ-REEL7 - Quad Precision Low Noise Op Amp | Analog Devices
部品番号: AD8674ARZ-REEL7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: AD8674ARZ-REEL7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AD8674ARZ-REEL7 （同一形状・フットプリント） — 相違点: Amplifier Type, Capacitive Load Stability, Input Bias Current, Input Offset Voltage, Supply Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
AD8674ARZ
✅ ドロップイン✓ 在庫あり
$3.1 / 個
データシートを見る →OPA4277
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
OPA4227
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1114
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AD8674ARZ-REEL7 最大定格＆電気的特性
| 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 |
| 動作温度範囲 | -40°C to +125°C |
| パッケージ | 14-SOIC |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Amplifier Type | Standard (General Purpose) |
| 出力タイプ | Rail-to-Rail Output |
AD8674ARZ-REEL7 ピン構成
| ピン 1 | OUT A — Output of amplifier A |
| ピン 2 | -IN A — Inverting input of amplifier A |
| ピン 3 | +IN A — Non-inverting input of amplifier A |
| ピン 4 | V+ — Positive supply voltage |
| ピン 5 | +IN B — Non-inverting input of amplifier B |
| ピン 6 | -IN B — Inverting input of amplifier B |
| ピン 7 | OUT B — Output of amplifier B |
| ピン 8 | OUT C — Output of amplifier C |
| ピン 9 | -IN C — Inverting input of amplifier C |
| ピン 10 | +IN C — Non-inverting input of amplifier C |
| ピン 11 | V- — Negative supply voltage |
| ピン 12 | +IN D — Non-inverting input of amplifier D |
| ピン 13 | -IN D — Inverting input of amplifier D |
| ピン 14 | OUT D — Output of amplifier D |
主な用途
AD8674ARZ-REEL7 の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD8674ARZ-REEL7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Lower noise than OPA4277 （vs OPA4277)
- Higher slew rate than OPA4227 （vs OPA4227)
- Lower offset voltage than LT1114 （vs LT1114)
設計ノート
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.
コンプライアンス情報
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
