| Number of DAC channels (#) | 2 |
| Analog inputs | 0 |
| Analog outputs | 2 |
| DAC SNR (Typ) (dB) | 100 |
| Sampling rate (Max) (kHz) | 96 |
| Control interface | SPI |
| Resolution (Bits) | 24 |
| Architecture | Delta-Sigma |
- 24-Bit Resolution
- Analog Performance (VCC = 5 V):
- Dynamic Range:
- 106 dB, Typical (PCM1748KE)
- 100 dB, Typical (PCM1748E)
- SNR:
- 106 dB, Typical (PCM1748KE)
- 100 dB, Typical (PCM1748E)
- THD+N:
- 0.002%, Typical (PCM1748KE)
- 0.003%, Typical (PCM1748E)
- Full-Scale Output: 3.1 Vp-p, Typical
- Dynamic Range:
- 8× Oversampling Digital Filter:
- Stop-Band Attenuation: -55 dB
- Pass-Band Ripple: ±0.03 dB
- Sampling Frequency: 5 kHz to 100 kHz
- System Clock: 256 fS, 384 fS, 512 fS, 768 fS With Autodetect
- Accepts 16-, 18-, 20-, and 24-Bit Audio Data
- Data Formats: Standard, I2S, and Left-Justified
- User-Programmable Mode Controls:
- Digital Attenuation: 0 dB to -63 dB, 0.5 dB/Step
- Digital De-Emphasis
- Digital Filter Rolloff: Sharp or Slow
- Soft Mute
- Zero Flags for Each Output
- Dual-Supply Operation:
- 5-V Analog
- 3.3-V Digital
- 5-V Tolerant Digital Inputs
- Small SSOP-16 Package
- APPLICATIONS
- AV Receivers
- DVD Movie Players
- DVD Add-On Cards for High-End PCs
- HDTV Receivers
- Car Audio Systems
- Other Applications Requiring 24-Bit Audio
FilterPro is a trademark of Texas Instruments.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
All trademarks are the property of their respective owners.
The PCM1748 is a CMOS, monolithic, integrated circuit which includes stereo digital-to-analog converters (DAC) and support circuitry in a small SSOP-16 package. The data converters use Texas Instruments' enhanced multilevel delta-sigma architecture that employs fourth-order noise shaping and 8-level amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1748 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 100 kHz are supported. A full set of user-programmable functions is accessible through a 3-wire serial-control port that supports register write functions.
