OPA682P - 240MHz Fixed-Gain Buffer | Texas Instruments
料号： OPA682P ✓ 量产中OPA682P 概述
A buffer amplifier is a specialized analog amplifier that provides high input impedance and low output impedance. It belongs to the operational-amplifier hierarchy and serves as a signal-conditioning interface between a high-impedance source and a lower-impedance destination. The OPA682P uses an internally fixed gain of either +1 or −1, according to the verified component description, allowing it to preserve a signal amplitude while providing a stronger drive capability. This fixed-gain architecture simplifies external circuitry and avoids the feedback network used with conventional voltage-feedback amplifiers.
The principal features of the OPA682P include its 240 MHz bandwidth, 6 mA operating supply current, 320 µA disabled current, and 150 mA maximum output current. Its output voltage swing is specified as ±5 V or single-supply operation. Together, these characteristics make the device useful in video and communications systems, test equipment, signal-conditioning modules, and other circuits where a high-speed, low-impedance output is required. The fixed gain also helps maintain predictable bandwidth because designers do not have to select an external feedback ratio.
OPA682P is based on a bipolar operational-amplifier architecture, as reflected in the distributor component classification. The wide bandwidth enables the buffer to preserve rapid transitions and higher-frequency signal content, while the high output-current capability can improve drive into downstream circuits. Compared with an external transistor buffer, the integrated approach reduces board area and component count. Compared with a general-purpose op-amp used as a follower, its internally fixed gain provides a more focused high-speed signal-path function.
Typical uses include video-buffer stages, communication transmitters, instrumentation, and high-speed analog test systems. In each case, the amplifier is placed between the originating signal path and a load or subsequent processing stage. The 6 mA supply current is useful in power-conscious designs, while the 320 µA disable current allows the buffer to be turned down when the signal path is inactive. Designers should still verify the complete datasheet electrical limits and operating conditions for the intended supply voltage.
A primary design consideration is output loading. Although the OPA682P can source up to 150 mA, the actual usable current and voltage swing depend on the supply rails, output impedance, load impedance, temperature, and selected output configuration. Layout should minimize trace resistance and capacitance at the output, while input and supply connections should be routed to preserve the device's high-speed performance.
This page consolidates the verified OPA682P bandwidth, current, disable-state, package, sourcing, and pricing information with practical application guidance. It also distinguishes verified specifications from parameters that remain unavailable in the supplied source data, helping engineers evaluate the part without inferring unsupported electrical values.
直接替换替代料： OPA682P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料OPA682P 最大额定值与电气特性
| Amplifier Type | Wideband fixed-gain buffer amplifier |
| Number of Circuits | 1 circuit |
| Bandwidth | 240 MHz |
| Internally Fixed Gain | +1 or -1 |
| 电源电流 | 6 mA |
| Disabled Supply Current | 320 µA |
| High Output Current | 150 mA |
| Output Voltage Swing | ±5 V or single-supply operation |
| Disable Function | Yes |
| Architecture | Bipolar |
| 封装 | 8-pin PDIP |
| 安装类型 | Through-hole |
OPA682P 8-pin pdip 引脚配置指南
OPA682P（8-pin 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： OPA682P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
OPA682P 适用于 6 应用s: Video Signal Buffering, Communications Transmit Signal Path, High-Speed Test and Measurement, Instrumentation Signal Conditioning, Portable Signal-Chain Interface, Analog Signal Isolation and Fanout.
Video Signal Buffering
OPA682P is appropriate for a high-speed video buffer because it combines 240 MHz bandwidth with an internally fixed gain of +1 or −1 and a 150 mA output-current capability. The device can sit between a video source and a downstream cable, monitor, or processing stage to reduce source-loading effects without adding an external feedback network. Its single-supply or ±5 V output-swing options support conventional video-interface design studies. The primary engineering benefit is a dedicated high-speed buffer function with predictable fixed gain, while the trade-off is the larger PDIP-8 footprint compared with modern surface-mount packages. Confirm the complete voltage, noise, slew-rate, and timing limits in the manufacturer datasheet before production release.
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Communications Transmit Signal Path
OPA682P can buffer a communications signal before it enters a driver or downstream RF stage because its 240 MHz bandwidth preserves fast transitions and its 150 mA output-current capability provides greater drive than a conventional small-signal follower. The fixed +1 or −1 gain supports either non-inverting or inverting signal paths without external feedback resistors. Its 6 mA operating current is also suitable for power-conscious portable or distributed communication equipment. Designers should verify the exact output swing, supply range, load impedance, and stability requirements at the intended signal frequency because those values are not fully present in the supplied search excerpts.
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High-Speed Test and Measurement
OPA682P fits source-isolation and level-buffer positions in high-speed test equipment where the measured system requires a 240 MHz buffer with low output impedance. The 150 mA output-current capability is useful when driving test cables, termination networks, or downstream instrumentation, while fixed +1 or −1 gain simplifies calibration references. Its 320 µA disabled state can reduce consumption when the test channel is inactive. The engineering trade-off is that fixed gain does not provide the flexible resistor-programmed attenuation of a general-purpose op-amp, so the system must be designed around the available gain configurations and verified operating limits.
推荐
Instrumentation Signal Conditioning
OPA682P is useful as a high-impedance-input, low-impedance-output interface in instrumentation signal chains where a sensor or frontend needs to drive a longer trace or measurement stage. Its 240 MHz bandwidth handles fast analog transitions, and the internally fixed +1 or −1 gain provides isolation without a discrete feedback network. The 6 mA supply current supports compact multi-channel systems, while the disable input permits individual channels to be turned down during idle periods. A complete review of input bias current, common-mode range, offset voltage, and noise is necessary because those specifications are unavailable in the supplied web excerpts.
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Portable Signal-Chain Interface
OPA682P can serve as a low-power buffer in portable instrumentation or communication modules that require 240 MHz bandwidth without the higher current consumption of a large general-purpose amplifier. The normal supply current is 6 mA, and the disable function reduces it to 320 µA when the buffered path is not active. This makes controlled shutdown useful for battery-powered equipment and multi-channel systems. Fixed gain and the 8-pin PDIP footprint are the principal constraints for modern ultra-compact products; engineers should compare those mechanical and functional restrictions against surface-mount alternatives before choosing the through-hole configuration.
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Analog Signal Isolation and Fanout
OPA682P can isolate a sensitive analog source from multiple downstream loads by presenting a high-impedance input and a stronger 150 mA-capable output. The 240 MHz bandwidth supports signal paths containing fast transients, and the fixed +1 or −1 gain lets the designer select amplitude preservation or polarity inversion without external feedback components. Its disable control can also be coordinated with system sequencing to hold downstream stages inactive during startup or test. Output stability, capacitive-load tolerance, and maximum input and output swing must be confirmed from the full manufacturer data before using the device with long cables or unusually capacitive loads.
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推荐产品汇总
工程参考数据： OPA682P ——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 |
|---|---|
| Package | 8-pin PDIP |
| Brand | Texas Instruments |
| Amplifier Type | Wideband fixed-gain buffer amplifier |
| Number of Circuits | 1 circuit |
| Bandwidth | 240 MHz |
| Internally Fixed Gain | +1 or -1 |
| Supply Current | 6 mA |
| Disabled Supply Current | 320 µA |
| High Output Current | 150 mA |
| Output Voltage Swing | ±5 V or single-supply operation |
| Disable Function | Yes |
| Listed Starting Price as of 2026-10-29 | $1.3807 |
关键差异点
- Purpose-built high-speed fixed-gain buffering （对比 General-purpose operational amplifier)
- Strong output-drive capability for a buffer （对比 Conventional low-power voltage follower)
- Reduced consumption in the disabled state （对比 Continuously enabled general-purpose amplifier)
设计说明
Route the OPA682P output directly to the intended load and minimize trace length, resistance, and capacitance between pins 1 and 8 when the configured gain requires those connections. High-speed signal paths should use a continuous ground reference and short supply connections. Keep sensitive sources physically separated from the output and disable-return traces to reduce parasitic coupling. The complete pin names and gain configuration must be confirmed from the manufacturer pinout before PCB routing.
Estimated normal-operation supply power is 6 mW per volt of supply voltage: 6 mA multiplied by the supply voltage. Thus, a 5 V rail consumes about 30 mW and a 12 V rail consumes about 72 mW. These are arithmetic estimates rather than datasheet power ratings. When the amplifier is disabled, the corresponding estimated consumption falls to 320 µW at 5 V or 3.84 mW at 12 V, subject to the actual disable conditions in the manufacturer data.
Do not treat the OPA682P as an interchangeable substitute for a general-purpose op-amp solely because both are eight-pin amplifiers. The OPA682P has internally fixed gain, specialized 240 MHz bandwidth, and a dedicated buffer architecture. Confirm the PDIP-8 pinout, supported supply range, input common-mode range, output swing, disable polarity, and stability into the intended load using the manufacturer datasheet before production use.
合规信息
The supplied verified search results do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. AEC-Q100 is marked not applicable because the component is presented as a general-purpose catalog amplifier, not as an automotive-qualified variant.