AD8674BRZ - Precision Quad Op Amp, 10MHz | Analog Devices
料号： AD8674BRZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.82 | $4.82 |
| 10 | $4.34 | $43.40 |
| 100 | $3.86 | $386.00 |
| 500 | $3.47 | $1,735.00 |
| 1,000 | $3.09 | $3,090.00 |
AD8674BRZ 概述
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 quad op amp, meaning it contains four independent amplifiers in one package, saving board space and cost in multi-channel systems. It belongs to the family of precision amplifiers, which prioritize low offset, low noise, and high stability over raw speed.
Key features of the AD8674BRZ include a low input bias current of 1 nA (typical), a low offset voltage of 10 µV (typical), and a low noise density of 2.8 nV/√Hz. The device also offers a high open-loop gain of 126 dB and a slew rate of 2.5 V/µs. These specifications make it ideal for precision data acquisition, sensor conditioning, and active filtering. The rail-to-rail output stage allows maximum dynamic range in single-supply applications.
The AD8674 uses a precision bipolar process with laser-trimmed thin-film resistors, achieving excellent DC accuracy. The high open-loop gain and wide bandwidth enable high closed-loop gain configurations without significant gain error. The device is specified over the industrial temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments.
Typical applications include precision instrumentation, medical devices, industrial process control, and audio signal processing. The low noise and low offset make it suitable for high-resolution ADC driver circuits, while the quad configuration is ideal for multi-channel data acquisition systems. The rail-to-rail output simplifies interface with ADCs and other mixed-signal devices.
When designing with the AD8674BRZ, ensure proper power supply decoupling with 0.1 µF ceramic capacitors close to the supply pins. The device is unity-gain stable, but for high-speed applications, consider the capacitive load stability. The SOIC-14 package provides good thermal performance for moderate power dissipation.
直接替换替代料： AD8674BRZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD8674BRZ （相同外形与封装尺寸） ——差异在于 Capacitive Load Stability, Input Bias Current, Package, Slew Rate, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
AD8674ARZ
✅ 直接替换✓ 有现货
$3.1 / 个
查看数据手册 →AD8674ARZ-REEL
✅ 直接替换📋 参考替代料（不在目录中）
OPA4277UA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA4227UA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT1114CN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD8674BRZ 最大额定值与电气特性
| Number of Channels | 4 |
| Supply Voltage Range | ±2.5 V to ±18 V (dual), 5 V to 36 V (single) |
| Bandwidth | 10 MHz |
| Slew Rate | 2.5 V/µs |
| Input Offset Voltage | 10 µV (typical) |
| Input Bias Current | 1 nA (typical) |
| Voltage Noise Density | 2.8 nV/√Hz |
| Open-Loop Gain | 126 dB |
| 输出类型 | Rail-to-Rail |
| Capacitive Load Stability | Stable with >1000 pF |
| 工作温度范围 | -40°C to +125°C |
| 封装 | SOIC-14 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
AD8674BRZ 引脚配置
| 引脚 1 | OUT A — Output of amplifier A |
| 引脚 2 | -IN A — Inverting input of amplifier A |
| 引脚 3 | +IN A — Non-inverting input of amplifier A |
| 引脚 4 | V+ — Positive supply |
| 引脚 5 | +IN B — Non-inverting input of amplifier B |
| 引脚 6 | -IN B — Inverting input of amplifier B |
| 引脚 7 | OUT B — Output of amplifier B |
| 引脚 8 | OUT C — Output of amplifier C |
| 引脚 9 | -IN C — Inverting input of amplifier C |
| 引脚 10 | +IN C — Non-inverting input of amplifier C |
| 引脚 11 | V- — Negative supply |
| 引脚 12 | +IN D — Non-inverting input of amplifier D |
| 引脚 13 | -IN D — Inverting input of amplifier D |
| 引脚 14 | OUT D — Output of amplifier D |
典型应用
AD8674BRZ 适用于 6 应用s: Precision Data Acquisition, Instrumentation Amplifiers, Active Filters, Medical Instrumentation, Industrial Process Control, Audio Signal Processing.
Precision Data Acquisition
The AD8674BRZ's low offset voltage (10 µV) and low noise (2.8 nV/√Hz) make it ideal for driving high-resolution ADCs in data acquisition systems. Its quad configuration allows simultaneous sampling of multiple channels, and the rail-to-rail output maximizes dynamic range. The wide bandwidth of 10 MHz ensures fast settling for multiplexed inputs.
推荐
Instrumentation Amplifiers
In precision instrumentation, the AD8674BRZ can be used to build three-op-amp instrumentation amplifiers with high common-mode rejection. Its low input bias current (1 nA) minimizes errors from source impedance, and the low offset drift ensures accuracy over temperature. The quad package allows multiple channels in a compact design.
推荐
Active Filters
The 10 MHz bandwidth and high open-loop gain (126 dB) of the AD8674BRZ make it suitable for active filters in signal conditioning. It can implement Butterworth, Chebyshev, or Bessel filters with precise cutoff frequencies. The low noise ensures minimal degradation of signal-to-noise ratio in the passband.
推荐
Medical Instrumentation
The AD8674BRZ is well-suited for medical devices such as ECG and EEG amplifiers, where low noise and low offset are critical for accurate biopotential measurement. Its low power consumption extends battery life in portable monitors. The wide temperature range supports sterilization and harsh environments.
推荐
Industrial Process Control
In industrial control systems, the AD8674BRZ provides precise signal conditioning for sensors like thermocouples and strain gauges. Its rail-to-rail output interfaces directly with ADCs and microcontrollers. The quad configuration reduces board space in multi-channel controllers, and the robust temperature range ensures reliability in factory environments.
推荐
Audio Signal Processing
The AD8674BRZ's low noise (2.8 nV/√Hz) and low distortion make it suitable for high-quality audio applications. It can be used in preamplifiers, equalizers, and active crossovers. The quad configuration allows stereo channels with additional stages, and the wide bandwidth preserves audio fidelity.
推荐
推荐产品汇总
工程参考数据： AD8674BRZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD8674ARZ | OPA4277UA | OPA4227UA |
|---|---|---|---|---|
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Number of Channels | 4 | 4 | 4 | 4 |
| Bandwidth | 10 MHz | 10 MHz | 1 MHz | 8 MHz |
| Input Offset Voltage | 10 µV | 10 µV | 10 µV | 10 µV |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 8 nV/√Hz | 3 nV/√Hz |
| Supply Voltage Range | ±2.5 V to ±18 V | ±2.5 V to ±18 V | ±2 V to ±18 V | ±2.5 V to ±18 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | -40°C to +125°C | -40°C to +125°C |
关键差异点
- Higher bandwidth than OPA4277 （对比 OPA4277UA)
- Lower noise than OPA4277 （对比 OPA4277UA)
- Wider temperature range than AD8674ARZ （对比 AD8674ARZ)
设计说明
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 with low-frequency transients. Proper decoupling is critical for maintaining the low noise performance of the AD8674BRZ.
For optimal performance, place the AD8674BRZ away from high-speed digital traces and use a ground plane to minimize noise pickup. Keep input traces short and shielded if necessary. The SOIC-14 package has a thermal pad? No, it does not, so ensure adequate copper area for heat dissipation if power dissipation is significant.
Avoid exceeding the absolute maximum supply voltage of ±18 V. Also, be cautious with capacitive loads: although the AD8674BRZ is stable with >1000 pF, larger loads may cause ringing. Use a series resistor if driving long cables. Additionally, the input common-mode range does not include the negative rail, so level-shift signals if needed.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
