Overview
The TDA7718, produced by STMicroelectronics, is a 3-band car audio processor designed to enhance and control audio signals in automotive audio systems. This integrated circuit offers a comprehensive set of features for input selection, volume control, bass, middle, and treble adjustments, and loudness compensation. It is packaged in a 28-pin TSSOP (Thin Shrink Small Outline Package) and is suitable for a wide range of automotive audio applications.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (Vs) | - | 7.5 | 10 | V |
| Supply Current (Is) | - | 23 | 35 | mA |
| Operating Ambient Temperature (Tamb) | -40 | - | 85 | °C |
| Storage Temperature Range (Tstg) | -55 | - | 150 | °C |
| Input Resistance (Rin) - Single-Ended | 70 | 100 | 130 | kΩ |
| Input Resistance (Rin) - Differential | 70 | 100 | - | kΩ |
| Common Mode Rejection Ratio (CMRR) | 44 | 60 | - | dB |
| Output Noise @ Speaker Outputs | - | 12 | 22 | µV |
Key Features
- Input Multiplexer: Supports quasi-differential stereo inputs (QD1), and multiple single-ended stereo inputs (SE1, SE2, SE3, and FD1/SE4+SE5).
- Loudness Control: 2nd order frequency response with programmable center frequencies (400 Hz, 800 Hz, 2400 Hz), 15 dB attenuation with 1 dB steps, and selectable high frequency boost or flat-mode.
- Volume Control: +23 dB to -31 dB with 1 dB step resolution, and soft-step control with programmable blend times.
- Bass Control: 2nd order frequency response with programmable center frequencies (60 Hz, 80 Hz, 100 Hz, 200 Hz), Q factor programmable (1.0, 1.25, 1.5, 2.0), and DC gain programmable.
- Middle and Treble Control: Programmable center frequencies and quality factors for middle and treble adjustments.
- Soft Mute: Mute attenuation up to 100 dB.
Applications
The TDA7718 is primarily designed for use in automotive audio systems, providing advanced signal processing capabilities to enhance audio quality. It is suitable for car radios, amplifiers, and other automotive audio equipment where precise control over volume, bass, middle, and treble is required.
Q & A
- What is the TDA7718 used for?
The TDA7718 is used as a 3-band car audio processor to enhance and control audio signals in automotive audio systems.
- What types of input does the TDA7718 support?
The TDA7718 supports quasi-differential stereo inputs and multiple single-ended stereo inputs.
- What are the programmable center frequencies for the loudness control?
The programmable center frequencies for the loudness control are 400 Hz, 800 Hz, and 2400 Hz.
- What is the range of the volume control?
The volume control ranges from +23 dB to -31 dB with 1 dB step resolution.
- What are the programmable center frequencies for the bass control?
The programmable center frequencies for the bass control are 60 Hz, 80 Hz, 100 Hz, and 200 Hz.
- What is the maximum supply voltage for the TDA7718?
The maximum supply voltage for the TDA7718 is 10 V.
- What is the operating ambient temperature range for the TDA7718?
The operating ambient temperature range for the TDA7718 is -40°C to 85°C.
- What is the storage temperature range for the TDA7718?
The storage temperature range for the TDA7718 is -55°C to 150°C.
- What is the typical supply current for the TDA7718?
The typical supply current for the TDA7718 is 23 mA.
- What is the common mode rejection ratio (CMRR) for the TDA7718?
The common mode rejection ratio (CMRR) for the TDA7718 is 44 dB to 60 dB.
