Overview
The VCA810ID, manufactured by Texas Instruments, is a DC-coupled, wideband, continuously variable, voltage-controlled gain amplifier. It is designed to provide differential input to single-ended output conversion and features a high-impedance gain control input for linear gain adjustment in the range of –40dB to 40dB. This product is widely used in applications requiring precise gain control, such as automatic gain control (AGC) systems, pulse amplitude compensation, and signal processing in communication systems. Its ability to maintain constant signal bandwidth and slew rate across the entire gain range makes it a competitive choice in the market.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Amplifier Type | Variable Gain | - | - |
| Circuit Count | 1 | - | - |
| Output Type | Single-Ended | - | - |
| Slew Rate | 350 | V/µs | - |
| -3dB Bandwidth | 35 | MHz | - |
| Input Bias Current | 6 | µA | - |
| Input Offset Voltage | 100 | µV | - |
| Supply Current | 20 | mA | - |
| Output Current | 60 | mA | - |
| Supply Voltage | ±5 | V | - |
| Operating Temperature | -40 to 85 | °C | - |
| Package | 8-SOIC | - | 3.90mm wide |
Key Features
- High gain adjustment range: ±40dB
- Differential input to single-ended output conversion
- Low input noise voltage: 2.4nV/√Hz
- Constant bandwidth and slew rate across the gain range
- High dB/V gain linearity: ±0.3dB
- Gain control bandwidth: 25MHz
- Low output DC error: <±40mV
- High output current: ±60mA
Applications
The VCA810ID is suitable for a variety of applications, including optical receiver time gain control, sonar systems, voltage-adjustable active filters, logarithmic amplifiers, and pulse amplitude compensation. It is also used in AGC receivers with RSSI (Received Signal Strength Indicator) functionality. Its ability to handle high-frequency signals with minimal distortion makes it ideal for communication systems and signal processing applications.
Q & A
1. What is the gain adjustment range of the VCA810ID?
The gain adjustment range is from –40dB to 40dB.
2. Can the VCA810ID operate with a single power supply?
No, it requires a dual power supply of ±5V.
3. What is the typical slew rate of the VCA810ID?
The typical slew rate is 350V/µs.
4. What is the input bias current of the VCA810ID?
The input bias current is 6µA.
5. What is the operating temperature range of the VCA810ID?
The operating temperature range is from -40°C to 85°C.
6. What is the output current capability of the VCA810ID?
The output current capability is ±60mA.
7. What is the gain control bandwidth of the VCA810ID?
The gain control bandwidth is 25MHz.
8. What is the typical input noise voltage of the VCA810ID?
The typical input noise voltage is 2.4nV/√Hz.
9. What is the package type of the VCA810ID?
The package type is 8-SOIC (3.90mm wide).
10. What are the typical applications of the VCA810ID?
Typical applications include optical receiver time gain control, sonar systems, and AGC receivers.
