The OPA838 decompensated voltage-feedback operational amplifier provides a high, 300MHz gain bandwidth product with 1.8nV/√Hz input noise voltage, requiring only a trimmed 0.95mA supply current. These features combine to provide an extremely power-efficient device for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications.
Operating at the minimum recommended noninverting gain of 6V/V results in a 90MHz, –3dB bandwidth. Extremely low input noise and offset voltage make the OPA838 an excellent choice for high gains. Even at a dc-coupled gain of 1000V/V, a 300kHz signal bandwidth is available with a maximum output offset voltage of ±125mV.
The single-channel OPA838 is available in 6-pin SOT-23, 6-pin SC70, and 8-pin X2QFN packages, all with a power shutdown feature. The OPA838 is also available in a 5-pin SC70 package.
| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | OPA838 1mA, 300MHz Gain Bandwidth, Voltage-Feedback Op Amp datasheet (Rev. E) | PDF | HTML | 2025年 8月 6日 |
| Technical article | 3 common questions when designing with high-speed amplifiers | PDF | HTML | 2020年 7月 17日 | |
| Application brief | Higher accuracy using an external amplifier in ultrasonic flow measurement | 2019年 2月 5日 | ||
| Application note | Noise Analysis for High Speed Op Amps (Rev. A) | 2005年 1月 17日 |
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The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |
| SOT-SC70 (DCK) | 5 | Ultra Librarian |
| SOT-SC70 (DCK) | 6 | Ultra Librarian |
| X2QFN (DXB) | 8 | Ultra Librarian |
Analog Engineer's Calc Installer
General calculator tool for analog design support.