The AK4425A is a 5V 24-bit stereo DAC with an integrated 2Vrms output buffer. A charge pump in the buffer develops an internal negative power supply rail that enables a ground-referenced 2Vrms output. Using AKM’s multi bit modulator architecture, the AK4425A delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4425A integrates a combination of switched-capacitor and continuous-time filters, increasing performance for systems with excessive clock jitter. The 24-bit word length and 192kHz sampling rate make this part ideal for a wide range of consumer audio applications, such as DVD, AV receiver system and set-top boxes. The AK4425A is offered in a space saving 16pin TSSOP package.

• Applications: Digital TVs/STBs, DVD/BD Players and Recorders, A/V Receivers
• Sampling Rate Ranging from 8kHz to 192kHz
• 128 times Oversampling (Normal Speed Mode)
• 64 times Oversampling (Double Speed Mode)
• 32 times Oversampling (Quad Speed Mode)
• 24-Bit 8 times FIR Digital Filter
• Switched-Capacitor Filter with High Tolerance to Clock Jitter
• Single Ended 2Vrms Output Buffer
• Digital De-emphasis Filter: 32kHz, 44.1kHz or 48kHz
• Soft mute
• Digital Attenuator (Linear 256 Steps)
• Control I/F: 3-wire
• Audio I/F format: 24Bit MSB justified, 24/20/16 LSB justified or I²S compatible
• Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
  128fs, 192fs, 256fs or 384fs (Double Speed Mode)
  128fs, 192fs (Quad Speed Mode)
• THD+N: -91dB
• Dynamic Range: 106dB
• Automatic Power-on Reset Circuit
• Power supply: +4.5 ~ +5.5V
• Ta = -20 to 85°C
• Small Package: 16pin TSSOP (6.4mm 5.0mm)
• Evaluation Board: AKD4425A