VCA822
- 150-MHz Small-Signal Bandwidth
(G = +10 V/V) - 137 MHz, 5 VPP Bandwidth (G = +10 V/V)
- 0.1-dB Gain Flatness to 28 MHz
- 1700 V/μs Slew Rate
- > 40-dB Gain Adjust Range
- High Gain Accuracy: 20 dB ±0.3 dB
- High Output Current: ±160 mA
The VCA822 device is a DC-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).
The internal architecture of the VCA822 device consists of two input
buffers and an output current feedback amplifier stage integrated with a multiplier core to provide
a complete variable gain amplifier (VGA) system that does not require external buffering. The
maximum gain is set externally with two resistors, providing flexibility in designs. The maximum
gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain
control voltage for the VCA822 device adjusts the gain linearly in V/V as the control voltage
varies from +1 V to 1 V. For example, set for a maximum gain of +10 V/V, the VCA822 device provides
10 V/V, at
1-V input, to 0.1 V/V at –1 V input of gain control range. The VCA822 device offers excellent
gain linearity. For a 20-dB maximum gain and a gain-control input voltage varying between 0 V and 1
V, the gain does not deviate by more than ±0.3 dB (maximum at +25°C).
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier データシート (Rev. D) | PDF | HTML | 2015/10/29 | ||
| e-Book(PDF) | The Signal - オペアンプ設計ブログ集 | PDF | HTML | 英語版 | PDF | HTML | 2018/03/23 | |
| アプリケーション・ノート | Implementating a Variable-Length Cat5e Cable Equalizer | 2010/04/25 | ||||
| アプリケーション・ノート | Wireline Data Transmission and Reception | 2010/01/27 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
DEM-VCA-MSOP-1A — DEM-VCA-MSOP-1A
DEM-VCA-SO-1B — DEM-VCA-SO-1B
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| SOIC (D) | 14 | Ultra Librarian |
| VSSOP (DGS) | 10 | Ultra Librarian |