OPA137P - 36V, 1MHz FET Op Amp | Texas Instruments
料号： OPA137P ✓ 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 |
OPA137P 概述
An operational amplifier is a voltage-gain building block that compares two input voltages and drives its output to represent their difference. The OPA137 belongs to the FET-input operational-amplifier family and combines low input current, low offset voltage, low quiescent current, and a moderate-speed, low-power design. This places it between general-purpose precision amplifiers and faster wideband amplifiers, making it suitable for analog signal conditioning rather than high-speed data conversion.
Key features include approximately ±5 pA typical input bias current, 1.5 mV low offset voltage, operation to ±18 V supplies, 1 MHz bandwidth, and 120 μA per channel quiescent current in the series description. Rail-to-rail input extends the usable common-mode range toward the positive supply, improving dynamic range in single-supply systems. The manufacturer describes the OPA137 series as a low-cost FET-input MicroAmplifier family for miniature and cost-sensitive applications.
The device uses a JFET-input architecture to achieve low input bias current while maintaining low power consumption. Its open-loop gain is listed as 145 dB in the manufacturer datasheet, while the 1 MHz bandwidth supports audio and general analog signal paths. The amplifier is intended for instrumentation, buffering, filtering, and precision analog interfaces where low input loading and moderate speed are more important than multi-gigahertz bandwidth.
Typical uses include sensor-interface conditioning, low-level current measurement, audio preamplification, analog filtering, and precision signal buffering. In a current-to-voltage converter, the low input bias current minimizes error across a high-value feedback resistor. In an audio preamplifier, the 1 MHz bandwidth is suitable for voice-band and general audio stages when operated within the device's stated supply and stability limits.
Designers should verify common-mode and output-swing limits for the actual supply voltage, provide stable feedback compensation, and account for input and output parasitics. Because the OPA137P is a single amplifier in an 8-pin PDIP, PCB layout must follow the exact manufacturer pinout rather than assuming the pin functions of the SOT-23-5 or MSOP-8 family variants.
This page combines the verified Texas Instruments product information, distributor package and inventory references, and practical selection guidance. It also distinguishes confirmed family-level specifications from package-specific data and identifies replacement candidates only when the same-package pin compatibility and parametric match can be substantiated.
直接替换替代料： OPA137P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
OPA990
✅ 直接替换📋 参考替代料（不在目录中）
OPA137UA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA137PA
✅ 直接替换📋 参考替代料（不在目录中）
TL061IP
✅ 直接替换📋 参考替代料（不在目录中）
OPA137P-A
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA137P 最大额定值与电气特性
| Product Type | Single FET-input operational amplifier |
| Manufacturer | Texas Instruments |
| Supply Voltage Range | To ±18 V |
| Maximum Supply Voltage | 36 V |
| Gain-Bandwidth Product | 1 MHz |
| Input Bias Current | ±5 pA typical |
| Input Offset Voltage | 1.5 mV maximum |
| 静态电流 | 120 μA per channel |
| Open-Loop Gain | 145 dB |
| Input Common-Mode Range | Rail-to-rail input to V+ |
| Number of Channels | 1 channel |
| 封装 | 8-pin PDIP |
| 安装类型 | Through-hole |
| Series | MicroAmplifier |
| Input Type | FET input |
| Primary Application | Low-level analog signal conditioning |
| Operating Voltage | ±18 V maximum supply |
| Supplier Package Designation | PDIP-8 |
OPA137P 引脚配置
| 引脚 1 | NC — Not connected; verify against the OPA137P manufacturer pinout |
| 引脚 2 | IN− — Inverting input; verify against the OPA137P manufacturer pinout |
| 引脚 3 | IN+ — Non-inverting input; verify against the OPA137P manufacturer pinout |
| 引脚 4 | V− — Negative supply; verify against the OPA137P manufacturer pinout |
| 引脚 5 | NC — Not connected; verify against the OPA137P manufacturer pinout |
| 引脚 6 | OUT — Operational-amplifier output; verify against the OPA137P manufacturer pinout |
| 引脚 7 | V+ — Positive supply; verify against the OPA137P manufacturer pinout |
| 引脚 8 | NC — Not connected; verify against the OPA137P manufacturer pinout |
典型应用
OPA137P 适用于 6 应用s: High-Impedance Sensor Interface, Precision Current-to-Voltage Conversion, Audio Preamplifier, Analog Filter Stage, Industrial Instrumentation Buffer, Low-Power Analog Control.
High-Impedance Sensor Interface
The OPA137P fits high-impedance sensor interfaces because the verified family data specifies approximately ±5 pA typical input bias current. Place the amplifier near the sensor input and use a high-value feedback network when the sensor output is small and leakage from the amplifier would otherwise create measurement error. The 1 MHz bandwidth is sufficient for many moderate-speed sensors, while the 36 V maximum supply rating provides headroom for industrial biasing. Check common-mode limits and leakage of the sensor, PCB, and protection components because the amplifier's input current is only one part of the total error budget.
推荐
Precision Current-to-Voltage Conversion
OPA137P is useful in current-to-voltage conversion when the sense element presents a high impedance to the input. Its approximately ±5 pA typical input bias current reduces the gate on the conversion error introduced by the amplifier, while the 145 dB listed open-loop gain supports accurate signal amplification in suitable operating regions. The 1 MHz bandwidth allows the stage to handle many sensor and control signals without requiring a high-speed operational amplifier. Resistor tolerance, input capacitance, common-mode headroom, and output swing must be designed together.
推荐
Audio Preamplifier
The OPA137P can serve in an audio preamplifier when the required bandwidth is modest and the source impedance is high. Its 1 MHz gain-bandwidth product covers voice-band and general audio stages, while the low input bias current reduces loading on high-impedance audio sources. The FET-input architecture and low quiescent current of 120 μA per channel align with low-power analog designs. Actual distortion, noise, output swing, stability, and channel separation must be checked from the manufacturer datasheet for the selected supply and feedback network.
推荐
Analog Filter Stage
OPA137P is suitable as an active filter element in low-frequency and moderate-bandwidth analog paths. Its 1 MHz gain-bandwidth product provides useful bandwidth for audio, instrumentation, and control signals, while the low quiescent current helps preserve low-power operation. Configure the filter topology so the intended closed-loop gain and feedback network remain stable, and account for the amplifier's finite gain-bandwidth behavior rather than treating it as an ideal component. PCB layout should minimize parasitic capacitance around high-impedance input nodes and sensitive feedback nodes.
推荐
Industrial Instrumentation Buffer
The OPA137P can buffer industrial instrumentation signals when the source requires low input loading and the signal bandwidth remains below the 1 MHz gain-bandwidth product. The 36 V maximum supply rating is useful in systems with wider supply headroom, and the rail-to-rail input-to-positive-supply feature can improve operation near the positive rail. Use appropriate protection, isolation, and filtering before the amplifier if the source includes transients or high common-mode voltage. Verify the exact operating-temperature and electrical limits for the selected ordering code.
推荐
Low-Power Analog Control
OPA137P is appropriate for low-power analog control loops where the input current and quiescent current are more important than very high bandwidth. Its 120 μA per channel quiescent current, approximately ±5 pA typical input bias current, and 1 MHz bandwidth provide a practical operating point for sensor conditioning and actuator drive support. The amplifier should be operated within its supply and common-mode limits, with careful attention to offset error and output drive. In a control loop, check phase margin and stability rather than relying only on nominal bandwidth.
推荐
推荐产品汇总
工程参考数据： OPA137P ——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 | OPA990 | OPA137UA | OPA137PA | TL061IP | OPA137P-A |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin PDIP | 8-pin PDIP; verify exact ordering package | 8-pin PDIP; verify exact ordering package | 8-pin PDIP; verify exact ordering package | 8-pin PDIP | 8-pin PDIP; verify exact ordering package |
| Product Type | Single FET-input operational amplifier | Operational amplifier; verify family details | OPA137-family amplifier variant | OPA137-family amplifier variant | Single operational amplifier | OPA137P-related ordering variant |
| Price at Quantity 1 | Not provided in verified web data | Not provided in verified web data | Not provided in verified web data | Not provided in verified web data | Not provided in verified web data | Not provided in verified web data |
关键差异点
- Low input bias current for high-impedance analog work （对比 TL061IP)
- Family-level low-power operation （对比 OPA990)
- Related TI family continuity （对比 OPA137PA)
- 36 V supply capability （对比 OPA137UA)
设计说明
Do not treat every 8-pin operational amplifier as interchangeable. OPA137P is a single-amplifier 8-pin PDIP device, and the verified data does not establish full pin compatibility for the listed comparison parts. Before substitution, compare the manufacturer pin diagram, supply pins, input functions, output function, package lead spacing, and operating-temperature limits. The pinout in this page is retained for package completeness but each function must be checked against the official OPA137P datasheet before PCB release.
Keep high-impedance input and feedback traces short and shield them from noisy switching nodes. The approximately ±5 pA typical input bias current makes leakage from contaminated boards, protection diodes, and long PCB traces relevant in precision sensor circuits. Use a clean ground reference, guard structures where appropriate, and minimize parasitic capacitance on the input node. Confirm the final layout against the manufacturer's recommended application examples and the sensor's isolation requirements.
Design the supply rails around the OPA137P's stated operating range and verify input common-mode and output-swing limits for the actual rail voltages. The 36 V maximum supply rating is not permission to exceed individual input or output voltage limits. Bypass each supply connection close to the device with suitable decoupling, maintain a low-impedance return path, and account for startup and supply-transient behavior in the surrounding circuit.
The 1 MHz gain-bandwidth product makes OPA137P appropriate for moderate-bandwidth analog stages, but closed-loop behavior still depends on the selected feedback network and noise gain. Check stability with the intended source and load capacitance, use compensation suitable for the topology, and evaluate settling before the next analog or conversion stage. In active filters, include the amplifier's finite gain-bandwidth response in the frequency-response analysis.
合规信息
Compliance status was not included in the verified web data. The component is an operational amplifier rather than an automotive-qualified part in the supplied information, so AEC-Q100 is recorded as not_applicable without implying a formal automotive qualification.