VCA810
- High Gain Adjust Range: ±40 dB
- Differential In, Single-Ended Out
- Low Input Noise Voltage: 2.4 nV/√Hz
- Constant Bandwidth vs Gain: 35 MHz
- High dB/V Gain Linearity: ±0.3 dB
- Gain Control Bandwidth: 25 MHz
- Low Output DC Error: < ±40 mV
- High Output Current: &plsumn;60 mA
- Low Supply Current: 24.8 mA
(Maximum for –40°C to 85°C Temperature Range) - APPLICATIONS
- Optical Receiver Time Gain Control
- Sonar Systems
- Voltage-Tunable Active Filters
- Log Amplifiers
- Pulse Amplitude Compensation
- AGC receivers With RSSI
- Improved Replacement for VCA610
All other trademarks are the property of their respective owners
The VCA810 is a DC-coupled, wideband, continuously variable, voltage-controlled gain amplifier. The device provides a differential input to single-ended output conversion with a high-impedance gain control input used to vary the gain over a 40-dB to 40-dB range linear in dB/V.
Operating from ±5-V supplies, the device gain control voltage adjusts the gain from 40 dB at a 0-V input to 40 dB at a 2-V input. Increasing the control voltage above ground attenuates the signal path to greater than 80 dB. Signal bandwidth and slew rate remain constant over the entire gain adjust range. This 40-dB/V gain control is accurate within ±1.5 dB (±0.9 dB for high grade), allowing the gain control voltage in an AGC application to be used as a received signal strength indicator (RSSI) with ±1.5-dB accuracy.
Excellent common-mode rejection and common-mode input range at the two high-impedance inputs allow the device to provide a differential receiver operation with gain adjust. The output signal is referenced to ground. Zero differential input voltage gives a 0-V output with a small DC offset error. Low input noise voltage ensures good output SNR at the highest gain settings.
In applications where pulse edge information is critical, and the device is being used to equalize varying channel loss, minimal change in group delay over gain setting retains excellent pulse edge information.
An improved output stage provides adequate output current to drive the most demanding loads. Although principally intended to drive analog-to-digital converters (ADCs) or second-stage amplifiers, the ±60-mA output current easily drives doubly-terminated 50-Ω lines or a passive post-filter stage over the ±1.7-V output voltage range.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | VCA810 High Gain Adjust Range, Wideband and Variable Gain Amplifier datasheet (Rev. G) | PDF | HTML | 2016年 1月 4日 |
User guide | DEM-VCA-SO-1A User's Guide (Rev. B) | 2010年 4月 22日 | ||
Application note | Measuring Board Parasitics in High-Speed Analog Design | 2003年 7月 7日 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
DEM-VCA-SO-1A — DEM-VCA-SO-1A 展示固定裝置
The DEM-VCA-SO-1A demonstration fixture helps designers evaluate the operation and performance of TI's single, wideband, voltage-controlled amplifiers. This unpopulated PC board is compatible with products offered in the SO-8 (D) package.
For more information on these types of high speed devices, as (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 引腳 | 下載 |
---|---|---|
SOIC (D) | 8 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點