PCM5101PWR Audio DAC Product Functional Description
1. Overview
The PCM5101PWR is a high – performance stereo digital – to – analog converter (DAC) from Texas Instruments (TI), designed for high – fidelity audio applications. It supports 24 – bit resolution with a 2Vrms output and integrates a low – jitter PLL for superior sound quality.
Key Features
• High – Resolution Audio: Supports 16/24/32 – bit PCM data, up to 384 kHz sampling rate.
• Low Distortion & Noise
◦ THD+N: -93 dB (typical)
◦ SNR: 112 dB (A – weighted)
• Integrated PLL: Eliminates the need for an external MCLK (Master Clock) in many applications.
• Single 3.3V Supply Operation: Low power consumption (~21 mW typical).
• DirectPath™ Technology: Eliminates DC – blocking capacitors for improved bass response.
• Small Package: TSSOP – 16 (5mm × 4.4mm), suitable for compact designs.
2. Functional Description
2.1 Digital Audio Interface
• Supports I2S, Left – Justified, Right – Justified, and DSP formats.
• Auto – Detection of Audio Formats: Simplifies system integration.
• Jitter Suppression: Built – in low – jitter clock recovery for clean audio output.
2.2 Analog Output
• 2Vrms Differential Output: Drives headphones or line – level signals directly.
• No External Output Filter Required: Integrated analog reconstruction filter.
• Pop/Click Suppression: Minimizes unwanted noise during power – up/down.
2.3 Power Management
• 3.3V Single Supply Operation (2.7V to 3.6V range).
• Low Power Consumption: ~21 mW (typical), suitable for portable devices.
3. Applications
• High – End Audio Systems (DACs, Amplifiers, Soundbars)
• Portable Media Players & USB DACs
• Gaming Consoles & Home Theater Systems
• Professional Audio Equipment
4. Pin Configuration (TSSOP – 16)
Pin No. Name Function
1 VDD Digital Supply (3.3V)
2 GND Ground
3 SCK Serial Clock (I2S)
4 DIN Digital Audio Input
5 LRCK Left/Right Clock (I2S)
6 FMT Audio Format Select
7 DEMP De – emphasis Control
8 XSMT Soft Mute Control
9 FLT Filter Bandwidth Select
10 VOUTL+ Left Channel Positive Output
11 VOUTL- Left Channel Negative Output
12 VOUTR- Right Channel Negative Output
13 VOUTR+ Right Channel Positive Output
14 AVDD Analog Supply (3.3V)
15 AGND Analog Ground
16 NC No Connection
5. Development Support
• Eval Boards: TI provides reference designs (e.g., PCM5101EVM).
• Design Resources: Available in TI’s Audio Design Center.
6. Key Advantages
✅ High – Resolution Audio (Up to 384 kHz, 24 – bit)
✅ Minimal External Components (No MCLK or output filter needed)
✅ Excellent Noise Performance (THD+N: -93 dB)
✅ Compact & Low – Power (TSSOP – 16, ~21 mW)
