PCM1681-Q1

105dB SNR 8 通道音频 DAC（汽车类）

The PCM1681 and are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter DAC and support circuitry in small 28-lead TSSOP PowerPAD packages. The DACs utilize Burr-Brown"s enhanced multilevel delta-sigma ΔΣ architecture to achieve excellent signal-to-noise performance and a high tolerance to clock jitter.

The PCM1681 and PCM1681-Q1 accept TDM time-division multiplexed format in addition to industry-standard audio data formats with 16- to 24-bit audio data width. Sampling rates up to 200 kHz are supported. The PCM1681 and PCM1681-Q1 provide a sub-set of user-programmable functions through a parallel control port, in addition to a full set of user-programmable functions through a serial control port, SPI, or I2C. The PCM1681 supports –40°C to +85°C for consumer grade applications and the PCM1681-Q1 supports –40°C to +105°C for automotive audio grade systems.

.

Qualified for Automotive Applications: PCM1681-

Q1

.

24-Bit Resolution

.

Analog Performance:

.

Dynamic Range: 105 dB Typical

.

SNR: 105 dB Typical

.

THD+N: 0.002% Typical

.

Full-Scale Output: 3.75 VPP Typical

.

4×/8× Oversampling Interpolation Filter:

.

Stop-Band Attenuation: –57 dB

.

Pass-Band Ripple: ±0.015 dB

.

Sampling Frequency: 5 kHz to 200 kHz

.

System Clock: 128 fS, 192 fS, 256 fS, 384 fS,

512 fS, 768 fS, or 1152 fS with Autodetect

.

Zero Flags for Selectable Channel Combinations

.

Flexible Mode Control:

.

SPI™/I2C™ Dual Mode for Serial Port

.

Parallel Hardware Control with 4 Functions

.

User-Programmable Functions in SPI/I2C:

.

Flexible Audio Data Formats:

.

Right-Justified, I2S™, Left-Justified, TDM,

DSP

.

16- and 24-Bit Audio Data

.

Digital Attenuation: Mode Selectable

.

0 dB to –63 dB, 0.5 dB/step

.

0 dB to –100 dB, 1 dB/step

.

Soft Mute

.

Digital De-Emphasis

.

Digital Filter Roll-Off: Sharp or Slow

.

Oversampling Mode

.

User-Programmable Functions in H/W:

.

Flexible Audio Data Formats:

.

Right-Justified, I2S, Left-Justified, TDM

.

Soft Mute

.

Digital De-Emphasis

.

Oversampling Mode

.

Power Supply Voltage: 5-V Analog, 3.3-V Digital

.

Package: 28-Lead HTSSOP PowerPAD

.

Operation Temperature Range:

.

–40°C to 85°C for Consumer Grade

.

–40°C to 105°C for Automotive Audio Grade