STMicroelectronics TDA7901-ZST

The TDA7901 is a single-chip quad-bridge amplifier in advanced BCD technology integrating: a full D/A converter, digital input for direct connection to I²S (or TDM) and powerful MOSFET output stages.

The integrated D/A converter allows the performance to reach an outstanding 117 dB S/N ratio with more than 117 dB of dynamic range. Moreover the TDA7901 integrates an innovative high efficiency concept, optimized also for uncorrelated music signals. The device implements class G operation mode.

Thanks to this concept, the dissipated “output power” under average listening conditions can be reduced more than the standard class AB devices. The TDA7901 also integrates a programmable PLL that is able to lock at the input frequencies of 64*Fs for all the input configurations.

The device is equipped with a full and advanced diagnostics array that communicates the status of each speaker through the I²C bus. DIM (Digital-Impedance-Meter) function allows to measure the value of the load. The same I²C bus allows to control several configurations of the device.

The TDA7901 is able to play music down to 4.5 V supply voltage thus it is compatible with the so-called 'start stop' battery profile. Several car makers adopt 'Start stop' feature to reduce the fuel consumption and the impact over the environment.

Moreover, TDA7901 guarantees EMI outstanding performance, in line with the CISPR25-restrictive standard requirement.

• AEC-Q100 qualification ongoing
• 24-bit resolution
• High Resolution Bandwidth support:
  • Up to 40 kHz (I²S 96 kHz) with attenuation [0 dB, -2 dB]
  • Up to 80 kHz (I²S 192 kHz) with attenuation [0 dB, -2 dB]
• 117 dB dynamic range (A-weighted)
• Real-time load current monitoring
• Voltage monitoring feature on I²C
• High Efficiency SB-I (SB-Improved) and Class-G operation
• 1 Ω driving capability
• High output power capability:
  • 4 x 27 W 4Ω@ 14.4 V, 1 kHz, THD = 10 %
  • 4 x 47 W 2Ω@ 14.4 V, 1 kHz, THD = 10 %
• Flexible mode control:
  • Full I²C bus driving (1.8 V/3.3 V) with eight addresses selectable
  • Independent front/rear play/mute
  • Selectable digital gains
  • Very low noise
  • Digital diagnostic with DC and AC load Detections
  • Digital diagnostic with OL and OD in play
  • Current Offset Detection
• EMI compliance evaluated following normative CISPR25
• Start-stop compatibility (operation down to 4.5 V)
• Sample rates: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz
• Flexible serial data port (1.8 V/3.3 V):
  • I²S standard, TDM 4Ch, TDM 8Ch, TDM 16Ch
• Output Voltage Offset Detector
• Independent front/rear clipping detector
• Programmable diagnostic pin
• CMOS compatible enable pin
• Thermal protection
• Pop free in mute to play transitions and vice versa