PCM1850APJTR

ADCs/DACs - Special Purpose Overview

The PCM1850APJTR is a stereo analog-to-digital converter featuring a 24-bit delta-sigma modulator and a sampling rate up to 96 kHz. It integrates a single-ended analog front end with a 6x2-channel multiplexer and a programmable-gain amplifier (PGA) offering a gain range of -11 dB to +11 dB in 0.5 dB steps. The device operates on dual power supplies: 5 V for the analog section and 3.3 V for the digital section. Key performance metrics include a typical signal-to-noise ratio of 101 dB, a dynamic range of 102 dB, and total harmonic distortion plus noise of 0.0023%. It supports master and slave modes with serial control via SPI.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 6x2-channel single-ended input multiplexer with programmable-gain amplifier (-11 dB to +11 dB).
• 24-bit resolution with sampling rates from 16 kHz to 96 kHz and system clock options of 256fs, 384fs, 512fs, or 768fs.
• High-performance audio specifications including 101 dB SNR, 102 dB dynamic range, and 0.0023% THD+N.
• Dual power supply architecture requiring 5 V analog and 3.3 V digital rails.

ADCs/DACs - Special Purpose Applications

• DVD/HDD/DVD+HDD recorders
• AV amplifier receivers
• CD recorders
• MD recorders
• Multitrack recorders
• Electric musical instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the component is the PCM1850A variant controlled by SPI, distinct from the I2C-controlled PCM1851A. Confirm the suffix 'PJT' corresponds to the 32-pin TQFP package. Ensure the operating environment stays within the specified temperature range of -40°C to +85°C. Check for ESD handling requirements during installation.

ADCs/DACs - Special Purpose Selection Notes

Select this model when a cost-sensitive stereo ADC with multiple analog inputs is required. The integrated PGA eliminates external amplifiers for varying signal levels. Choose between PCM1850A (SPI) and PCM1851A (I2C) based on the available host controller interface. Ensure the system can provide separate 5 V and 3.3 V power domains.

ADCs/DACs - Special Purpose Part Context

This part belongs to the PCM1850A/PCM1851A family of high-performance, low-cost stereo A/D converters. The PCM1850APJTR specifically denotes the version with SPI serial control, packaged in a 32-pin Thin Quad Flatpack (TQFP). It is designed for applications requiring good audio performance with operation from a 5-V analog supply and a 3.3-V digital supply.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM1851APJT is a pin-compatible alternative that uses an I2C interface instead of SPI for mode control. Verify interface compatibility before substitution.