描述 Description

The PCM1681 and PCM1681-Q1 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.

特性 Features

? 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