| Number of DAC channels (#) | 2 |
| Analog inputs | 0 |
| Analog outputs | 2 |
| DAC SNR (Typ) (dB) | 113 |
| Sampling rate (Max) (kHz) | 192 |
| Control interface | SPI, I2C, H/W |
| Resolution (Bits) | 24 |
| Architecture | Current Segment DAC |
- Enhanced Multi-Level Delta-Sigma DAC:
- High Performance: Differential, fS = 48 kHz
- THD+N: –94 dB
- SNR: 113 dB
- Dynamic Range: 113 dB
- Sampling Rate: 8 kHz to 192 kHz
- System Clock: 128 fS, 192 fS, 256 fS, 384 fS,
512 fS, 768 fS, 1152 fS - Differential Voltage Output: 8 VPP
- Analog Low-Pass Filter Included
- 4x/8x Oversampling Digital Filter:
- Passband Ripple: ±0.0018 dB
- Stop Band Attenuation: –75 dB
- Zero Flags (16-, 20-, 24-Bits)
- Flexible Audio Interface:
- I/F Format: I2S, Left-/Right-Justified, DSP
- Data Length: 16, 20, 24, 32 Bits
- Flexible Mode Control:
- 3-Wire SPI, 2-Wire I2C-Compatible Serial
Control Interface, or Hardware Control - Connect Up To 4 Devices on One SPI Bus
- 3-Wire SPI, 2-Wire I2C-Compatible Serial
- Multi Functions via SPI or I2C I/F:
- Audio I/F Format Select: I2S, Left-Justified,
Right-Justified, DSP - Digital Attenuation and Soft Mute
- Digital De-Emphasis: 32kHz, 44.1kHz, 48kHz
- Data Polarity Control
- Power-Save Mode
- Audio I/F Format Select: I2S, Left-Justified,
- Multi Functions via Hardware Control:
- Audio I/F Format Select: I2S, Left-Justified
- Digital De-Emphasis Filter: 44.1kHz
- Analog Mute by Clock Halt Detection
- External Reset Pin
- Power Supplies:
- 5 V for Analog and 3.3 V for Digital
- Package: TSSOP-24
- Operating Temperature Range: –40°C to 85°C
The PCM1789 is a high-performance, single-chip, 24-bit, stereo, audio digital-to-analog converter (DAC) with differential outputs. The two-channel, 24-bit DAC employs an enhanced multi-level, delta-sigma (ΔΣ) modulator, and supports 8 kHz to 192 kHz sampling rates and a 16-, 20-, 24-, 32-bit width digital audio input word on the audio interface. The audio interface of PCM1789 supports a 24-bit, DSP format in addition to I2S, left-justified, and right-justified formats.
The PCM1789 can be controlled through a three-wire, SPI-compatible or two-wire, I2C-compatible serial interface in software, which provides access to all functions including digital attenuation, soft mute, de-emphasis, and so forth. Also, hardware control mode provides two user-programmable functions through two control pins. The PCM1789 is available in a 24-pin TSSOP package.
