PCM1850PJTR

ADCs/DACs - Special Purpose Overview

The PCM1850PJTR is a stereo analog-to-digital converter featuring a single-ended analog front end with a 6-channel multiplexer and programmable-gain amplifier. It utilizes a delta-sigma modulator with 64-times oversampling, a digital decimation filter, and an on-chip high-pass filter. The device supports sampling rates from 16 kHz to 96 kHz with system clocks of 256 fs, 384 fs, 512 fs, or 768 fs. Electrical specifications include a typical THD+N of 0.0023%, SNR of 101 dB, and dynamic range of 102 dB at 48 kHz. It operates on dual power supplies: 5 V for analog (VCC) and 3.3 V for digital (VDD).

ADCs/DACs - Special Purpose Feature Summary

• Integrated 6x2-channel single-ended input multiplexer with PGA gain ranging from -11 dB to +11 dB in 0.5 dB steps.
• 24-bit resolution with typical SNR of 101 dB and dynamic range of 102 dB.
• Supports master and slave modes with selectable data formats including 24-bit Left Justified, I2S, and Right Justified.
• Includes built-in antialiasing filter and digital decimation filter with ±0.05 dB pass-band ripple.

ADCs/DACs - Special Purpose Applications

• DVD/HDD/DVD+HDD recorders
• AV amplifier receivers
• CD recorders
• MD recorders
• Multi-track recorders

ADCs/DACs - Special Purpose Procurement Notes

Verify the PJTR suffix indicates tape and reel packaging for the PCM1850 variant. Confirm the component is the SPI-controlled version, distinct from the I2C-controlled PCM1851. Ensure the operating temperature range meets the -40°C to 85°C requirement specified for this part number.

ADCs/DACs - Special Purpose Selection Notes

Select the PCM1850 over the PCM1851 when SPI control is required instead of I2C. Ensure the application requires single-ended inputs rather than differential signals. Verify that the 5 V analog supply voltage aligns with the system design, as the device does not support lower analog voltages.

ADCs/DACs - Special Purpose Part Context

The PCM1850PJTR belongs to the PCM1850/PCM1851 family of high-performance stereo A/D converters. It shares identical electrical performance and pinout with the PCM1851, differing only in the serial control interface protocol. Both devices are fabricated using advanced CMOS technology and are housed in a 32-lead TQFP package.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM1851PJT is a functional substitute if the system controller supports I2C instead of SPI. Other Texas Instruments audio ADCs may require significant schematic and firmware modifications due to differences in interface protocols, power requirements, or pin configurations.