Overview
The TDA7718CTR, produced by STMicroelectronics, is a high-performance 3-band car audio processor designed specifically for car radio applications. This device integrates a comprehensive set of audio filters and features a new soft-step architecture, allowing for precise digital control over various filter characteristics. It is packaged in a TSSOP28 format, making it suitable for compact automotive audio systems.
Key Specifications
| Specification | Details |
|---|---|
| Package | TSSOP28 |
| Input Types | Quasi-differential stereo (QD1), Single-ended stereo (SE1, SE2, SE3), Full-differential or quasi-differential stereo (FD/QD2) |
| Loudness | 2nd order frequency response, Programmable center frequency (400 Hz / 800 Hz / 2400 Hz), 15 dB with 1 dB steps, Selectable high frequency boost |
| Volume Control | +23 dB to -31 dB with 1 dB step resolution, Soft-step control with programmable blend times |
| Bass Control | 2nd order frequency response, Center frequency programmable in 4 steps (60 Hz / 80 Hz / 100 Hz / 200 Hz), Q programmable (1.0/1.25/1.5/2.0), DC gain programmable (-15 dB to 15 dB range with 1 dB resolution) |
| Middle Control | 2nd order frequency response, Center frequency programmable in 4 steps (500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz), Q programmable (0.75/1.0/1.25), -15 dB to 15 dB range with 1 dB resolution |
| Treble Control | 2nd order frequency response, Center frequency programmable in 4 steps (10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz), -15 dB to 15 dB with 1 dB resolution |
| Speaker Control | 4 independent soft-step speaker controls, +15 dB to -79 dB with 1 dB steps, Direct mute |
| Subwoofer Filter | 2nd order low pass filter with programmable cut off frequency (55 Hz / 85 Hz / 120 Hz / 160 Hz), 2 independent soft-step level control, +15 dB to –79 dB with 1 dB steps |
| Mute Functions | Direct mute, Digitally controlled soft-mute with 4 programmable mute-times (0.48 ms/0.96 ms/8 ms/16 ms) |
| Offset Detection | Offset voltage detection circuit for on-board power amplifier failure diagnosis |
Key Features
- High performance audio processor with fully integrated audio filters
- Soft-step architecture for smooth volume and tone control
- Programmable loudness, bass, middle, and treble controls
- Multiple input types including quasi-differential and single-ended inputs
- Independent soft-step speaker controls and subwoofer filter
- Digital control via I2C bus interface
- Offset voltage detection for power amplifier failure diagnosis
- Direct mute and digitally controlled soft-mute functions
Applications
The TDA7718CTR is primarily designed for car radio and infotainment systems, offering advanced audio processing capabilities. It is suitable for use in various automotive audio applications where precise control over audio parameters is required.
Q & A
- What is the primary function of the TDA7718CTR?
The TDA7718CTR is a 3-band car audio processor designed for car radio applications, providing advanced audio filtering and control. - What types of inputs does the TDA7718CTR support?
The device supports quasi-differential stereo (QD1), single-ended stereo (SE1, SE2, SE3), and full-differential or quasi-differential stereo (FD/QD2) inputs. - How does the loudness control work on the TDA7718CTR?
The loudness control features a 2nd order frequency response with programmable center frequencies (400 Hz / 800 Hz / 2400 Hz) and a range of 15 dB with 1 dB steps. - What are the key features of the bass control on the TDA7718CTR?
The bass control has a 2nd order frequency response, programmable center frequencies (60 Hz / 80 Hz / 100 Hz / 200 Hz), Q factors (1.0/1.25/1.5/2.0), and DC gain programmable from -15 dB to 15 dB with 1 dB resolution. - How does the subwoofer filter work?
The subwoofer filter is a 2nd order low pass filter with programmable cut off frequencies (55 Hz / 85 Hz / 120 Hz / 160 Hz) and includes 2 independent soft-step level controls. - What mute functions are available on the TDA7718CTR?
The device features direct mute and digitally controlled soft-mute with 4 programmable mute times (0.48 ms/0.96 ms/8 ms/16 ms). - How is the TDA7718CTR controlled?
The device is controlled via an I2C bus interface, allowing for digital control over its various functions. - What is the purpose of the offset voltage detection circuit?
The offset voltage detection circuit is used for diagnosing on-board power amplifier failure. - In what package is the TDA7718CTR available?
The TDA7718CTR is available in a TSSOP28 package. - What are some common applications for the TDA7718CTR?
The TDA7718CTR is commonly used in car radio and infotainment systems where advanced audio processing is required.
