Overview
The PCM1681PWPR, manufactured by Texas Instruments, is a 24-bit, 192-kHz sampling, enhanced multilevel delta-sigma audio digital-to-analog converter (DAC). This component is part of the PCM1681 and PCM1681-Q1 series, which feature an eight-channel DAC and support circuitry in a compact 28-lead TSSOP PowerPAD package. The DACs utilize Burr-Brown's enhanced multilevel delta-sigma (ΔΣ) architecture, ensuring excellent signal-to-noise performance and high tolerance to clock jitter. The PCM1681 is suitable for consumer-grade applications, while the PCM1681-Q1 is qualified for automotive applications, supporting a wider temperature range of –40°C to 105°C.
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 | |
| Analog Supply Voltage | 4.5 to 5.5 V | V |
| Digital Supply Voltage | 3 to 3.6 V | V |
| Operating Temperature (Consumer Grade) | –40°C to 85°C | °C |
| Operating Temperature (Automotive Grade) | –40°C to 105°C | °C |
| Dynamic Range | 105 dB Typical | dB |
| Signal-to-Noise Ratio (SNR) | 105 dB Typical | dB |
| Total Harmonic Distortion + Noise (THD+N) | 0.002% Typical | % |
| Full-Scale Output | 3.75 VPP Typical | VPP |
Key Features
- Enhanced Multilevel Delta-Sigma Architecture: Achieves excellent signal-to-noise performance and high tolerance to clock jitter.
- Flexible Audio Data Formats: Supports right-justified, I2S, left-justified, TDM, and DSP formats with 16- to 24-bit audio data width.
- User-Programmable Functions: Available through both serial (SPI/I2C) and parallel control ports.
- Digital Attenuation and De-Emphasis: Mode-selectable digital attenuation (0 dB to –63 dB, 0.5 dB/step or 0 dB to –100 dB, 1 dB/step) and digital de-emphasis.
- Oversampling Interpolation Filter: 4×/8× oversampling with stop-band attenuation of –57 dB and pass-band ripple of ±0.015 dB.
- Soft Mute and Zero Flags: For selectable channel combinations.
- Power Supply and Temperature Range: 5-V analog and 3.3-V digital supply; operating temperature range of –40°C to 85°C for consumer grade and –40°C to 105°C for automotive grade.
Applications
- Car Audio External Amplifiers and AVN Applications: Suitable for automotive audio systems.
- Integrated A/V Receivers and DVD Movie and Audio Players: Ideal for high-quality audio in consumer electronics.
- HDTV Receivers and DVD Add-On Cards for High-End PCs: Enhances audio performance in multimedia devices.
- Digital Audio Workstations and Other Multichannel Audio Systems: Supports professional audio applications.
Q & A
- What is the resolution of the PCM1681PWPR?
The PCM1681PWPR 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 for the PCM1681PWPR?
The system clock can operate at 128 fS, 192 fS, 256 fS, 384 fS, 512 fS, 768 fS, or 1152 fS.
- What are the power supply requirements for the PCM1681PWPR?
The component requires a 5-V analog supply and a 3.3-V digital supply.
- What is the operating temperature range for the consumer grade PCM1681?
The operating temperature range for the consumer grade PCM1681 is –40°C to 85°C.
- What is the operating temperature range for the automotive grade PCM1681-Q1?
The operating temperature range for the automotive grade PCM1681-Q1 is –40°C to 105°C.
- What are the key audio performance metrics of the PCM1681PWPR?
The key metrics include a dynamic range of 105 dB, SNR of 105 dB, and THD+N of 0.002% typical.
- Does the PCM1681PWPR support TDM format?
Yes, it supports TDM (time-division multiplexed) format in addition to other industry-standard audio data formats.
- How can the PCM1681PWPR be controlled?
The component can be controlled through both serial (SPI/I2C) and parallel control ports.
- What are some typical applications of the PCM1681PWPR?
Typical applications include car audio systems, integrated A/V receivers, DVD players, HDTV receivers, and digital audio workstations.
