Texas Instruments VCA810
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 highimpedance gain control input used to vary the gain over a –40-dB to 40-dB range linear in dB/V.| Part No. | VCA810 |
|---|---|
| Datasheet | VCA810 Download |
| Manufacturer |  Texas Instruments |
| Description | Wideband and Variable Gain Amplifier |
| Buy | Stock & Price |
FEATURES
●1 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: ±60 mA
● Low Supply Current: 24.8 mA (Maximum for –40°C to 85°C Temperature Range) 2
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 3
DESCRIPTION
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 40dB/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.
