Overview
The PCM1681PWPRG4, produced by Texas Instruments, is a 24-bit, 192-kHz sampling, enhanced multilevel delta-sigma audio digital-to-analog converter (DAC). This integrated circuit is designed for high-performance audio applications, featuring an eight-channel DAC and supporting circuitry in a compact 28-lead HTSSOP PowerPAD package. The PCM1681 and its automotive-grade variant, PCM1681-Q1, are optimized for excellent signal-to-noise performance and high tolerance to clock jitter.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24-bit | |
| 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 | |
| Analog Supply Voltage | 4.5 to 5.5 V | V |
| Digital Supply Voltage | 3 to 3.6 V | V |
| Dynamic Range | 105 dB Typical | dB |
| SNR | 105 dB Typical | dB |
| THD+N | 0.002% Typical | % |
| Full-Scale Output | 3.75 VPP Typical | VPP |
| Operating Temperature Range (Consumer Grade) | –40°C to 85°C | °C |
| Operating Temperature Range (Automotive Grade) | –40°C to 105°C | °C |
| Package | 28-Lead HTSSOP PowerPAD |
Key Features
- Enhanced multilevel delta-sigma (ΔΣ) architecture for excellent signal-to-noise performance and high tolerance to clock jitter.
- Support for various audio data formats: right-justified, I2S, left-justified, TDM, and DSP.
- User-programmable functions through SPI, I2C, or parallel hardware control.
- Digital attenuation: 0 dB to –63 dB (0.5 dB/step) and 0 dB to –100 dB (1 dB/step).
- Digital de-emphasis and soft mute capabilities.
- Flexible mode control with oversampling interpolation filter (4×/8×) and sharp or slow digital filter roll-off.
- Zero flags for selectable channel combinations.
Applications
- Car audio external amplifiers and AVN applications.
- Integrated A/V receivers and DVD movie and audio players.
- HDTV receivers and DVD add-on cards for high-end PCs.
- Digital audio workstations and other multichannel audio systems.
Q & A
- What is the resolution of the PCM1681PWPRG4?
The PCM1681PWPRG4 has a 24-bit resolution.
- What are the supported sampling frequencies?
The supported sampling frequencies range from 5 kHz to 200 kHz.
- What are the system clock options?
The system clock can operate at 128 fS, 192 fS, 256 fS, 384 fS, 512 fS, 768 fS, or 1152 fS with autodetect.
- What are the supply voltage requirements?
The analog supply voltage is 4.5 to 5.5 V, and the digital supply voltage is 3 to 3.6 V.
- What is the typical dynamic range and SNR?
The typical dynamic range and SNR are both 105 dB.
- What is the typical THD+N?
The typical THD+N is 0.002%.
- What is the full-scale output voltage?
The full-scale output voltage is 3.75 VPP typical.
- What are the operating temperature ranges for consumer and automotive grades?
The operating temperature range for consumer grade is –40°C to 85°C, and for automotive grade, it is –40°C to 105°C.
- What package type is used for the PCM1681PWPRG4?
The package type is a 28-Lead HTSSOP PowerPAD.
- What audio data formats are supported?
The supported formats include right-justified, I2S, left-justified, TDM, and DSP.
