PCM1781系列介绍资料

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PCM1781

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106dB SNR 立体声 DAC（硬件控制）

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The PCM1780/81/82 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog converters and support circuitry in a small 16-lead SSOP package. The data converters use TI’s enhanced multilevel delta-sigma architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1780/81/82 accepts industry standard audio data formats with 16- to 24-bit data, providing easy interfacing to audio DSP and decoder chips. Sampling rates up to 200 kHz are supported. The PCM1780/82 provides a full set of user-programmable functions through a three-wire serial control port, which supports register write functions. The PCM1781 provides a subset of user-programmable functions through four control pins.

The PCM1780 is pin-compatible with the PCM1680 (8-channel DAC).

24-Bit Resolution
Analog Performance (V_CC = 5 V):
- Dynamic Range: 106 dB
- SNR: 106 dB, Typical
- THD+N: 0.002%, Typical
- Full-Scale Output: 3.9 Vp-p, Typical
4×/8× Oversampling Digital Filter:
- Stop-Band Attenuation: -50 dB
- Pass-Band Ripple: ±0.04 dB
Sampling Frequency: 5 kHz to 200 kHz
System Clock: 128 f_S, 192 f_S, 256 f_S, 384 f_S, 512 f_S, 768 f_S, 1152 f_S With Autodetect
Software Control (PCM1780, PCM1782):
- Accepts 16-, 18-, 20-, and 24-Bit Audio Data
- Formats: Right-Justified, I²S, and Left-Justified
- Digital Attenuation: Mode Selectable
  - 0 dB to -63 dB, 0.5 dB/step
  - 0 dB to -100 dB, 1 dB/step
- Digital De-Emphasis
- Digital Filter Rolloff: Sharp or Slow
- Soft Mute
- Zero Flags for Each Output
- Open-Drain Output Zero Flag (PCM1782)
Hardware Control (PCM1781):
- I²S and 16-Bit Word, Right-Justified
- Digital De-Emphasis
- Soft Mute
- Zero Flag for L-, R-Channel Common Output
Power Supply: 5-V Single Supply
Small, 16-Lead SSOP Package (150 mil)
Pin-Compatible with PCM1680
APPLICATIONS
- A/V Receivers
- DVD Movie Players
- DVD Add-On Cards For High-End PCs
- DVD Audio Players
- HDTV Receivers
- Car Audio Systems
- Other Applications Requiring 24-Bit Audio

System Two, Audio Precision are trademarks of Audio Precision, Inc.
All other trademarks are the property of their respective owners.

Number of DAC channels	2
Analog inputs	0
Analog outputs	2
DAC SNR (typ) (dB)	106
Sampling rate (max) (kHz)	192
Control interface	H/W
Resolution (Bits)	24
Architecture	Delta-Sigma
Operating temperature range (°C)	-25 to 85
Rating	Catalog

SSOP (DBQ)

29.4 mm² 4.9 x 6

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PCM1781

106dB SNR 立体声 DAC（硬件控制）

4000-306-326