Features: 24-Bit Resolution
Analog Performance:
− Dynamic Range: 113 dB
− THD+N: 0.001%
− Full-Scale Output: 2.1 V RMS (at Postamp)
Differential Voltage Output: 3.2 Vp-p 8* Oversampling Digital Filter:
− Stop-Band Attenuation: 82 dB
− Pass-Band Ripple: ±0.002 dB
Sampling Frequency: 10 kHz to 200 kHz
System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
Accepts 16-, 20-, and 24-Bit Audio Data
PCM Data Formats: Standard, I2S, and Left-Justified
DSD Format Interface Available
Optional Interface to External Digital Filter or
DSP Available
TDMCA or Serial Port (SPI/I2C)
User-Programmable Mode Controls:
− Digital Attenuation: 0 dB to 120 dB, 0.5 dB/Step
− Digital De-Emphasis
− Digital Filter Rolloff: Sharp or Slow
− Soft Mute
− Zero Flag for Each Output/PCM and DSD Formats
Dual Supply Operation:
− 5-V Analog, 3.3-V Digital
Application A/V Receivers
SACD Players
HDTV Receivers
Car Audio Systems
Digital Multitrack Recorders
Other Applications Requiring 24-Bit AudioPinout
Specificationsover operating free-air temperature range unless otherwise noted(1)
| |
|
PCM1791A |
| Supply voltage |
VCCF, VCCL, VCCC, VCCR |
−0.3 V to 6.5 V |
| VDD |
−0.3 V to 4 V |
| Supply voltage differences: VCCF, VCCL, VCCC, VCCR |
±0.1 V |
| Ground voltage differences: AGNDF, AGNDL, AGNDC, AGNDR, DGND |
±0.1 V |
| Digital input voltage |
LRCK, DATA, BCK, SCK, MS(2), MDI(2), MC, MUTE, RST, MSEL |
0.3 V to 6.5 V |
| ZEROL, ZEROR, MDO, MS(3), MDI(3) |
0.3 V to (VDD + 0.3 V) < 4 V |
| Analog input voltage |
0.3 V to (VCC + 0.3 V) < 6.5 V |
| Input current (any pins except supplies) |
±10 mA |
| Ambient temperature under bias |
40°C to 125°C |
| Storage temperature |
55°C to 150°C |
| Junction temperature |
150°C |
| Lead temperature (soldering) |
260°C, 5 s |
| Package temperature (IR reflow, peak) |
260°C |
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Input mode or I2C mode.
(3) Output mode except for I2C mode.
DescriptionThe PCM1791A is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI's advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to lock jitter. The PCM1791A provides balanced voltage outputs, allowing the user to optimize analog performance externally. The PCM1791A accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1791A also accepts interface to external digital filter devices (DF1704, DF1706, PMD200). Sampling rates up to 200 kHz are supported. A full set of user-programmable functions is accessible through an SPI or I 2C serial control port, which supports register write and readback functions. The PCM1791A also supports the time-divisionmultiplexed command and audio (TDMCA) data format.
PCM1791A Data Sheet
