Overview
The VCA821IDR is a high-performance voltage-controlled amplifier (VCA) designed and manufactured by Texas Instruments. This integrated circuit is optimized for precise gain control in various signal processing applications, particularly in audio and telecommunications. It features low noise and low distortion characteristics, ensuring that signals remain clean and true to the original source. The VCA821IDR operates on a wide power supply range from 3V to 15V, making it versatile for different electronic designs. Its robust performance and user-friendly design make it an ideal choice for professional audio equipment, sound processing systems, and other applications requiring accurate signal amplitude modulation.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 14-SOIC (0.154", 3.90mm Width) |
| Supply Voltage Range | 3V to 15V |
| -3db Bandwidth | 710 MHz |
| Gain Bandwidth Product | 320 MHz |
| Dynamic Range | 105 dB |
| Noise | 0.5 nV/√Hz |
| Distortion | <0.05% (1 kHz, Vout = 2Vpp) |
| Gain Control Range | 0 to 40 dB |
| Input Impedance | 10 kΩ |
| Output Impedance | 1 kΩ |
| Common Mode Rejection Ratio | 65 dB |
Key Features
- Single supply voltage range: 3V to 15V
- Low noise: 0.5 nV/√Hz
- Low distortion: <0.05% (1 kHz, Vout = 2Vpp)
- Gain control range: 0 to 40 dB
- Input impedance: 10 kΩ
- Output impedance: 1 kΩ
- Integrated error amplifier for accurate gain control and reduced distortion
- Compact SOIC-14 package for space-constrained applications
- Extended temperature range for various operating conditions
Applications
- Professional audio processing systems
- Musical instrument amplifiers
- Dynamic range compression applications
- Broadcast audio systems
- Television and radio transmitters
- Sound reinforcement systems
- Automotive audio equipment
- Wireless communication devices
- Telecommunications and test equipment
Q & A
- What is the power supply range for the VCA821IDR? The VCA821IDR operates on a supply voltage range from 3V to 15V.
- Can I use the VCA821IDR in battery-operated devices? Yes, its low operating voltage makes it suitable for battery-powered applications.
- What is the maximum output voltage of the VCA821IDR? The maximum output voltage is typically limited by the supply voltage; however, it can output a maximum of 2Vpp for low distortion.
- Is it necessary to include external components? While the VCA821IDR is designed for simplicity, certain configurations may require additional external components to achieve specific performance characteristics.
- How do I enable or disable the VCA821IDR? The ENABLE pin (Pin 8) can be used to turn the device on or off by connecting it to the supply voltage for enabling or to ground for disabling.
- What is the bandwidth of the VCA821IDR? The -3db bandwidth of the VCA821IDR is 710 MHz.
- What is the common mode rejection ratio of the VCA821IDR? The common mode rejection ratio is 65 dB.
- What is the gain bandwidth product of the VCA821IDR? The gain bandwidth product is 320 MHz.
- What package type does the VCA821IDR come in? The VCA821IDR is housed in a 14-SOIC package.
- What are some alternative models to the VCA821IDR? Alternative models include the VCA820IDR, VCA822IDR, and VCA823IDR, each with slightly different specifications and features.
