OPA627 - Precision High-Speed JFET Op Amp | Texas Instruments
料号： OPA627 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.8 | $980.00 |
| 500 | $8.5 | $4,250.00 |
| 1,000 | $7.9 | $7,900.00 |
OPA627 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 OPA627 belongs to the class of precision op amps, which prioritize low offset voltage, low drift, and low noise. Within the hierarchy of amplifiers, it sits as a precision JFET-input op amp, offering higher input impedance and lower bias current than bipolar-input counterparts, making it ideal for high-impedance sources.
The OPA627 features very low noise of 4.5nV/√Hz at 10kHz, fast settling time to 0.01%, and low input bias current of 5pA. Its high slew rate of 55V/µs and wide bandwidth support high-speed signal processing. The device also offers excellent DC precision with low offset voltage and drift, ensuring accuracy in measurement and control systems. The JFET input stage provides high input impedance, minimizing loading on sensitive sources.
Technically, the OPA627 uses a Difet (dielectrically isolated FET) input stage, which reduces leakage currents and improves noise performance compared to conventional JFET designs. The device is designed for stability with capacitive loads and offers robust output drive capability. Its specifications are guaranteed over a wide temperature range, with the P and D packages rated from -25°C to 85°C and the LMC package from -55°C to 125°C.
Typical applications include precision instrumentation, audio preamplifiers, active filters, data acquisition systems, and photodiode amplifiers. The OPA627's low noise and high speed make it particularly suited for high-fidelity audio and precision measurement equipment. Its low bias current is essential for applications with high source impedances, such as pH sensors and photodiodes.
When designing with the OPA627, ensure proper power supply decoupling with 0.1µF capacitors close to the supply pins. For optimal noise performance, use metal-film resistors and keep the feedback network impedance low. The OPA627 is a versatile choice for demanding precision applications.
直接替换替代料： OPA627 ——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： OPA627 （相同外形与封装尺寸） ——差异在于 Slew Rate, Amplifier Type, Supply Voltage Range, Gain Bandwidth Product, Input Bias Current.
快速对比工具——选择替代料号进行并排对比：
OPA827
✅ 直接替换✓ 有现货
$2.88 / 个
查看数据手册 →OPA637
✅ 直接替换📋 参考替代料（不在目录中）
OPA828IDR
✅ 直接替换✓ 有现货
$1.75 / 个
查看数据手册 →AD797
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADA4627
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA627 最大额定值与电气特性
| Slew Rate | 55 V/µs |
| Maximum Offset Voltage | 100 µV |
| Maximum Drift | 0.8 µV/°C |
| Input Bias Current | 5 pA |
| Noise at 10 kHz | 4.5 nV/√Hz |
| Supply Voltage Range | 9 V to 36 V (±4.5 V to ±18 V) |
| Operating Temperature Range (P and D packages) | -25°C to 85°C |
| Operating Temperature Range (LMC package) | -55°C to 125°C |
| Package Options | 8-pin DIP, SOIC, and others |
| Unity-Gain Stable | Yes |
| Input Type | JFET |
| Number of Circuits | 1 |
| Amplifier Type | Precision, High-Speed |
OPA627 引脚配置
| 引脚 1 | Offset Trim — Offset voltage trim input |
| 引脚 2 | IN- — Inverting input |
| 引脚 3 | IN+ — Non-inverting input |
| 引脚 4 | V- — Negative supply |
| 引脚 5 | Offset Trim — Offset voltage trim input |
| 引脚 6 | OUT — Output |
| 引脚 7 | V+ — Positive supply |
| 引脚 8 | NC — No connection |
典型应用
OPA627 适用于 6 应用s: Precision Instrumentation, High-End Audio Preamplifier, Active Filters, Photodiode Amplifier, Data Acquisition Systems, Test and Measurement Equipment.
Precision Instrumentation
The OPA627's low offset voltage (100µV max) and low drift (0.8µV/°C) ensure accurate signal conditioning in precision measurement systems. Its high slew rate of 55V/µs allows fast response to transient signals, while the JFET input minimizes loading on high-impedance sensors. This makes it ideal for data acquisition front-ends and sensor amplifiers where accuracy is paramount.
推荐
High-End Audio Preamplifier
With a noise of 4.5nV/√Hz at 10kHz and high slew rate, the OPA627 delivers clean, detailed audio reproduction. Its low distortion and wide bandwidth preserve the original signal integrity, making it a favorite in audiophile-grade preamps and DAC output stages. The JFET input provides high input impedance, matching well with high-impedance sources like guitar pickups and phono cartridges.
推荐
Active Filters
The OPA627's high slew rate and wide bandwidth make it suitable for active filter designs, such as low-pass and high-pass filters in signal processing. Its low offset voltage ensures minimal DC error, and the high input impedance allows easy implementation of Sallen-Key topologies. The device's stability with capacitive loads simplifies filter design.
推荐
Photodiode Amplifier
The OPA627's low input bias current of 5pA is essential for photodiode transimpedance amplifiers, where leakage currents can cause significant errors. Its low noise and high speed enable accurate detection of fast optical signals. The JFET input also provides high impedance, minimizing loading on the photodiode and preserving signal integrity.
推荐
Data Acquisition Systems
In data acquisition, the OPA627 provides precise signal conditioning before ADC conversion. Its low offset and drift ensure accurate DC measurements, while the high slew rate supports fast sampling rates. The device's wide supply range allows operation in various system voltages, and its low noise improves the signal-to-noise ratio of the entire acquisition chain.
推荐
Test and Measurement Equipment
The OPA627's precision and speed make it ideal for test equipment such as oscilloscope front-ends and signal generators. Its low noise and high bandwidth ensure accurate signal reproduction, while the low offset voltage minimizes measurement errors. The device's robustness over temperature ranges supports reliable operation in benchtop and field instruments.
推荐
推荐产品汇总
工程参考数据： OPA627 ——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 | OPA827 | OPA637 | OPA828 | AD797 | ADA4627 |
|---|---|---|---|---|---|---|
| Package | DIP-8, SOIC-8 | SOIC-8 | DIP-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Slew Rate | 55 V/µs | 28 V/µs | 135 V/µs | 30 V/µs | 20 V/µs | 48 V/µs |
| Input Bias Current | 5 pA | 15 pA | 5 pA | 15 pA | 250 nA | 25 pA |
| Noise at 10 kHz | 4.5 nV/√Hz | 4 nV/√Hz | 4.5 nV/√Hz | 4 nV/√Hz | 0.9 nV/√Hz | 4.2 nV/√Hz |
| Offset Voltage (max) | 100 µV | 150 µV | 100 µV | 150 µV | 25 µV | 120 µV |
| Supply Voltage Range | 9V to 36V | 8V to 36V | 9V to 36V | 8V to 36V | 9V to 36V | 9V to 36V |
| Unity-Gain Stable | Yes | Yes | No (gain>=5) | Yes | Yes | Yes |
关键差异点
- Lower noise than OPA637 （对比 OPA637)
- JFET input with lower bias current than AD797 （对比 AD797)
- Higher slew rate than OPA827 （对比 OPA827)
设计说明
Ensure proper power supply decoupling with 0.1µF ceramic capacitors placed close to the V+ and V- pins. Additionally, use 10µF tantalum capacitors in parallel for low-frequency decoupling. This minimizes power supply noise and ensures stable operation, especially in high-speed applications.
For optimal noise performance, use a ground plane and keep the feedback network components close to the op amp. Avoid running high-speed digital traces near the input pins to prevent coupling. Use short, direct traces for the input and output to minimize parasitic capacitance and inductance.
The OPA627 has a maximum supply voltage of 36V. Exceeding this can damage the device. Also, be cautious with capacitive loads; although the OPA627 is stable with moderate capacitive loads, large capacitors may cause ringing. Use a small series resistor (e.g., 50Ω) at the output if driving long cables or large capacitive loads.
合规信息
Compliance information not provided in the verified data. Check TI product page for RoHS and REACH status.
