PCM1789

113dB SNR 立体声 DAC

The 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.

.

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

.

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

.

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