Packaging information
| Package | Pins SSOP (DB) | 24 |
| Operating temperature range (°C) |
| Package qty | Carrier 2,000 | LARGE T&R |
Features for the PCM1740
- COMPLETE DELTA-SIGMA STEREO DAC
- VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR:
- 27MHz ±150ppm Output with 0V to 3V Input
- PROGRAMMABLE PLL
- 256fS or 384fS Audio System Clock Output
- DYNAMIC PERFORMANCE:
- Dynamic Range: 94dB
- SNR: 94dB
- THD+N: 89dB
- SAMPLING FREQUENCIES:
- 16kHz, 22.05kHz, 24kHz
- 32kHz, 44.1kHz, 48kHz
- 64kHz, 88.2kHz, 96kHz
- SERIAL AUDIO INTERFACE:
- Standard or I2S™ Data Formats
- 16-, 20-, or 24-Bit Data
- I2C-BUS™ INTERFACE FOR CONTROL REGISTERS:
- Slave Receiver Operation
- 7-Bit Addressing
- Standard Transfer Rate (up to 100kbps)
- PROGRAMMABLE CONTROLS:
- Digital Attenuation (256 steps)
- Soft Mute
- Infinite Zero Detect Mute
- De-Emphasis (32kHz, 44.1kHz, 48kHz)
- DAC Output Mode
- SINGLE +5V SUPPLY
- SMALL SSOP-24 PACKAGE
- APPLICATIONS
- SET-TOP BOXES
- DIGITAL BROADCAST RECEIVERS
SoundPLUS is a trademark of Texas Instruments.
I2C-Bus, I2C, and I2S are trademarks of NXP B.V.
All other trademarks are the property of their respective owners.
Description for the PCM1740
The PCM1740 is a complete stereo audio digital-to-analog converter with on-chip PLL and VCXO. The PCM1740 is designed specifically for set-top box applications requiring high-quality audio playback, a precision tuned 27MHz master clock source, and support for multiple audio-sampling frequencies.
The stereo digital-to-analog converter (DAC) uses multibit, delta-sigma architecture, which includes an 8x interpolation filter, 3rd-order noise shaping, 5-level amplitude quantization, and an analog low-pass filter. The PCM1740 includes a number of user-programmable functions, which are accessed via a standard I2C-Bus interface.