OPA37GP - 63MHz Ultra-Low-Noise Precision Op Amp | Texas Instruments
料号： OPA37GP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
OPA37GP 概述
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs while using negative feedback to set closed-loop gain. Precision operational amplifiers add low offset, low bias current, and stable voltage-noise performance. The OPA37 belongs to the broader hierarchy of operational amplifier, analog amplifier, signal-conditioning IC, and semiconductor.
The OPA37GP combines a 63 MHz gain-bandwidth product with a decompensated architecture, allowing operation at higher closed-loop gains than a unity-gain-stable device. Its 4.5 nV/√Hz noise and 100 µV offset make it suitable for precision audio, instrumentation, sensor-interface, and low-level signal-chain applications. The 11.9 V/µs slew rate supports faster signal transitions while preserving low distortion.
The device accepts dual supplies identified in the verified product data as approximately ±4 V to ±22 V, giving a broad operating range for laboratory, industrial, and communications equipment. The OPA37GP is specified for a -40 °C to 85 °C temperature range and is offered in the P package with 8 pins. The manufacturer describes the family as ultra-low-noise and precision, with laser-trimmed thin-film resistor technology cited in retrieved technical material.
Typical uses include low-level audio amplification, precision measurement front ends, current-voltage conversion, active filters, and instrumentation signal conditioning. The amplifier is particularly appropriate when low noise and accurate DC performance matter more than minimum power consumption or minimum cost.
When laying out an OPA37GP circuit, keep the feedback network and input connections short, preserve the required supply decoupling, and avoid placing long copper paths beside high-gain input nodes. Because this is a decompensated amplifier, verify the minimum stable closed-loop gain before substituting it into a unity-gain circuit. This page combines verified manufacturer and distributor information with practical selection guidance, application context, and replacement checks.
直接替换替代料： OPA37GP ——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： OPA37GP （相同外形与封装尺寸） ——差异在于 Amplifier Type, Operating Temperature Range, Package, Gain-Bandwidth Product, Slew Rate.
快速对比工具——选择替代料号进行并排对比：
OP37GP
✅ 直接替换📋 参考替代料（不在目录中）
OP37GPZ
✅ 直接替换📋 参考替代料（不在目录中）
AD797
✅ 直接替换📋 参考替代料（不在目录中）
AD8671
✅ 直接替换📋 参考替代料（不在目录中）
OPA37GP 最大额定值与电气特性
| Amplifier Type | Single operational amplifier |
| 拓扑 | Decompensated precision operational amplifier |
| Number of Circuits | 1 circuit |
| Gain-Bandwidth Product | 63 MHz |
| Slew Rate | 11.9 V/µs |
| Input Noise Density | 4.5 nV/√Hz |
| Offset Voltage | 100 µV |
| Supply Voltage Range | ±4 V to ±22 V |
| 工作温度范围 | -40 °C to 85 °C |
| 封装 | PDIP (P), 8 pins |
| Package Type | Through-hole PDIP |
| Manufacturer | Texas Instruments |
| Application Category | Precision signal processing |
OPA37GP through-hole pdip 引脚配置指南
OPA37GP（through-hole pdip 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： OPA37GP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
OPA37GP 适用于 6 应用s: Precision Audio Front End, Low-Level Instrumentation Amplification, Sensor Signal Conditioning, Active Precision Filters, Precision Current-to-Voltage Conversion, Laboratory and Test Equipment Signal Path.
Precision Audio Front End
The OPA37GP fits low-level audio preamplification because its 4.5 nV/√Hz input noise helps preserve small signals and its 11.9 V/µs slew rate supports fast waveform transitions. The device can amplify microphone, line, or instrumentation signals while maintaining low distortion in a dual-supply circuit. Because the OPA37 is decompensated, the feedback network must be selected for stable operation at the intended closed-loop gain, and supply decoupling should be placed close to the device.
推荐
Low-Level Instrumentation Amplification
OPA37GP is appropriate for precision measurement front ends that amplify small sensor or laboratory signals. Its 100 µV offset specification supports accurate DC measurement, while the 4.5 nV/√Hz noise specification reduces amplifier-generated noise relative to the sensed signal. The circuit should use short input traces, clean grounding, stable feedback resistors, and dual supplies that satisfy the verified approximately ±4 V to ±22 V range. Verify the required minimum closed-loop gain before implementation.
推荐
Sensor Signal Conditioning
OPA37GP can condition low-amplitude sensor outputs where source resistance and signal level make amplifier noise important. The 4.5 nV/√Hz input-noise figure is useful for reducing noise added to a weak sensor signal, while the 63 MHz gain-bandwidth product provides bandwidth for signal shaping and filtering. Use short, guarded input routing and avoid high-impedance nodes near switching circuitry. Confirm the actual minimum stable gain and output swing in the manufacturer datasheet.
推荐
Active Precision Filters
OPA37GP can be used in active filter designs requiring controlled gain, low noise, and adequate bandwidth. Its 63 MHz gain-bandwidth product and 11.9 V/µs slew rate allow it to process signals through several audio or measurement filter sections, provided the closed-loop gain remains within the decompensated device's stable operating region. Resistor matching and capacitor selection should be reviewed for the target frequency and tolerance. Prototype the filter and check phase margin and distortion rather than assuming generic op-amp behavior.
推荐
Precision Current-to-Voltage Conversion
OPA37GP is useful in transimpedance and current-measurement circuits when low input noise and low offset are more important than minimum power. The 100 µV offset helps reduce output error, and the 4.5 nV/√Hz noise specification supports small-signal current detection. The feedback resistor and compensation network must be calculated for the source capacitance and target bandwidth, while the decompensated amplifier must be operated above its stable-gain requirement. PCB input capacitance and leakage should be minimized.
推荐
Laboratory and Test Equipment Signal Path
OPA37GP can serve as a low-noise amplifier stage in laboratory instruments, test fixtures, and precision measurement equipment. The combination of low noise, 100 µV offset, 63 MHz bandwidth, and 11.9 V/µs slew rate allows it to handle both low-frequency accuracy and faster signal details. Use a clean reference ground, isolated high-gain wiring, and supply bypass capacitors selected according to the manufacturer recommendations. Confirm output swing, input common-mode range, and stability with the actual circuit load.
推荐
推荐产品汇总
工程参考数据： OPA37GP ——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 | OP37GP | OP37GPZ | AD797 | AD8671 | OPA227 |
|---|---|---|---|---|---|---|
| Package | 8-pin PDIP (P) | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 |
| Brand | Texas Instruments | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
关键差异点
- Decompensated precision architecture （对比 OPA227)
- Verified high-speed precision performance （对比 AD8671)
- Low-noise input specification （对比 OP37GPZ)
设计说明
The OPA37 is decompensated, so the closed-loop gain must be selected for stable operation rather than assuming unity-gain stability. Before layout, identify the minimum stable gain from the manufacturer datasheet and confirm that the intended feedback network satisfies it. A substitution that is unity-gain stable may behave differently from the OPA37 even if its headline bandwidth appears similar.
Use short, direct traces for the input and feedback paths. Place compensation and feedback components close to the relevant amplifier pins, and keep high-impedance input nodes away from switching nodes and digital return currents. Because the part is an 8-pin PDIP, provide adequate lead spacing and route the ground return to reduce parasitic inductance and avoid introducing instability.
Decouple each supply rail near the OPA37GP with the capacitance and ESR recommendations from the manufacturer datasheet. The verified range of approximately ±4 V to ±22 V should be treated as the supply design envelope, not as permission to exceed absolute maximum ratings. Check startup sequencing, rail symmetry, and output swing before connecting the amplifier to an external signal chain.
For low-level inputs, minimize source resistance and avoid long unshielded traces. The 4.5 nV/√Hz noise specification makes input layout important because leakage, leakage through contaminated boards, and high-impedance guarding can dominate the system error. Keep the input network localized and verify the complete signal path with an oscilloscope and suitable low-noise measurement techniques.
合规信息
The supplied verified data identifies the product and package but does not provide specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements. These fields remain unknown rather than inferred.
