Model No: PCM5122PWR
Texas Instruments PCM5122PWR
Manufacturer: Texas Instruments
SEMICON NO.: PCM5122PWR
Package: 28-TSSOP
Stock: In stock
Description: DAC Audio 16/20/24/32-bit 384kHz PCM
SEMICON NO.: PCM5122PWR
Package: 28-TSSOP
Stock: In stock
Description: DAC Audio 16/20/24/32-bit 384kHz PCM
Quantity :
| Mfr | Texas Instruments |
| Device Type | Stereo Audio Digital-to-Analog Converter (DAC) |
| Resolution | 16 / 20 / 24 / 32-bit audio data |
| Maximum Sampling Rate (fS) | 384 kHz |
| Dynamic Range | 112 dB |
| Output Level | 2 VRMS |
| Line Driver Load Capability | Supports loads down to 1 kΩ |
| Audio Data Formats | I²S, Left-Justified, Right-Justified, TDM/DSP |
| Control Interface | SPI or I²C |
| Analog Supply | 3.3 V |
| Digital Supply | 1.8 V or 3.3 V |
| Operating Temperature | –25°C to +85°C |
| Package | 28-TSSOP |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
The PCM5122PWR is a high-performance 32-bit stereo audio DAC from Texas Instruments' PCM512x family, delivering 112dB dynamic range and SNR with -93dB THD+N, supporting sample rates up to 384kHz. Built on TI's advanced segment-DAC architecture with improved clock-jitter tolerance, this 2VRMS DirectPath audio stereo DAC integrates an internal negative charge pump that produces ground-centered 2.1VRMS outputs, eliminating DC-blocking capacitors and external muting circuits. The device incorporates a high-performance audio PLL with BCK reference that generates the system clock internally, enabling a simple 3-wire I2S connection while reducing system EMI. Packaged in a compact TSSOP-28 (9.7mm x 4.4mm) with tape-and-reel packing (R suffix), it operates from a single 3.3V analog supply with 1.8V or 3.3V digital rails across a -25°C to +85°C temperature range.
Applications
● A/V receivers and home theater audio systems.
● DVD and Blu-ray disc players.
● HDTV receivers and digital television audio stages.
● Raspberry Pi HiFi I2S DAC expansion boards and audio sound card modules.
● Any application requiring 2VRMS audio output from a single 3.3V supply.
FAQs
Q: How does the PCM5122 differ from the PCM5102A? A: The PCM5122 adds SPI/I2C software control with built-in configurable filters, gain settings, and zero-data detection disable, while the PCM5102A is hardware-pin configured only.
Q: Is an external master clock (SCK) required? A: No - the internal audio PLL generates SCK from BCK, allowing a 3-wire I2S connection.
Q: What control interface should be used? A: I2C or SPI for software configuration, or hardwired mode with ATT pins for standalone gain setting.
Alternative stereo DAC Models
1. PCM5122PW: The identical DAC shipped in tubes instead of tape-and-reel for prototyping and low-volume assembly.
2. PCM5121PWR: The 106dB dynamic-range sibling with identical pinout for cost-sensitive designs needing slightly less performance.
3. PCM5142PWR: The miniDSP-upgrade version adding a fully programmable 32-bit audio processing core for custom filters and flows.
4. PCM5242: The higher-tier PCM5242 with hybrid miniDSP flow capability in a 48-pin package for advanced signal-chain designs.
5. PCM5102A: The hardware-only control predecessor popular in budget Raspberry Pi DAC boards without software registers.
