Overview
The TDA7448, available in the package TDA744813TR, is a 6-channel volume controller designed by STMicroelectronics for high-quality audio applications in multi-channel audio systems. This device utilizes bipolar/CMOS technology to achieve low distortion, low noise, and precise DC stepping. It is particularly suited for systems requiring independent volume control for each channel with a high resolution of 1dB steps over a range of 0 to -79dB.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VS) | 4.75 | 9 | 10 | V |
| Operating Ambient Temperature (Tamb) | 0 | - | 70 | °C |
| Storage Temperature Range (Tstg) | -55 | - | 150 | °C |
| Supply Current (IS) | - | 7 | - | mA |
| Input Resistance (RIN) | 35 | 50 | 65 | KΩ |
| Clipping Level (VCL) | 2 | 2.5 | - | Vrms |
| Signal to Noise Ratio (S/N) | - | 100 | - | dB |
| Total Harmonic Distortion (THD) | 0.01 | 0.1 | - | % |
| Channel Separation (SC) | 80 | 90 | - | dB |
| Volume Control Range | -79 | - | 0 | dB |
| Volume Control Step Resolution | 1 | - | - | dB |
Key Features
- 6 independent input and output channels
- Volume attenuation range of 0 to -79dB in 1dB steps
- Low distortion and low noise due to bipolar/CMOS technology
- All functions programmable via I2C serial bus interface
- High channel separation and signal to noise ratio
- Mute function with 90dB attenuation
Applications
The TDA7448 is ideal for multi-channel audio systems, home theaters, car audio systems, and any application requiring precise and independent volume control for multiple channels. Its high resolution and low noise characteristics make it suitable for systems where audio quality is critical.
Q & A
- What is the TDA7448? The TDA7448 is a 6-channel volume controller designed for high-quality audio applications.
- What is the volume control range of the TDA7448? The volume control range is from 0 to -79dB in 1dB steps.
- What technology does the TDA7448 use? It uses bipolar/CMOS technology.
- How is the TDA7448 programmed? It is programmed via an I2C serial bus interface.
- What is the typical supply current of the TDA7448? The typical supply current is 7mA.
- What is the signal to noise ratio of the TDA7448? The signal to noise ratio is 100dB.
- What is the total harmonic distortion of the TDA7448? The total harmonic distortion is 0.01% to 0.1%.
- Can the TDA7448 be used in high-temperature environments? Yes, it operates in ambient temperatures from 0°C to 70°C.
- What is the storage temperature range for the TDA7448? The storage temperature range is from -55°C to 150°C.
- Does the TDA7448 have a mute function? Yes, it has a mute function with 90dB attenuation.
