PCM1801U

PCM1801U is a TI Burr-Brown stereo, 24-bit ADC (two-channel analog-to-digital converter) from the PCM180x family. It converts two analog audio inputs into digital PCM data with high dynamic range and low noise. Features commonly include differential inputs with selectable PGA gain, a flexible digital interface (I2S/Left-Justified), and support for standard sampling rates up to 96 kHz. It operates from a single supply (typical 3.3V, sometimes 5V) with modest power consumption. Applications include sound cards, audio interfaces, mixers, and portable audio devices needing an integrated ADC. The exact performance and interface options depend on the specific device variant and package; check the TI datasheet for PCM1801U for precise specs and pinout.

PCM1801U is a 24-bit, stereo audio ADC (96 kHz) with I2S/Left-Justified outputs. Direct drop-in equivalents from other vendors include:
- Cirrus Logic CS534x family (24-bit, 96 kHz stereo ADCs)
- Analog Devices AD183x/AD193x series (24-bit stereo ADCs)
- AKM AK539X family (24-bit, 96 kHz stereo ADCs)

- Stereo 24-bit delta-sigma ADC
- Differential analog input (high Common-Mode rejection)
- Digital output via I2S-compatible serial interface (and compatible formats)
- Sampling rate up to 96 kHz (supports common rates like 32/44.1/48/88.2/96 kHz)
- Internal reference/bias to simplify front-end design
- Low-noise, wide dynamic range for high-quality audio
- Low-power, compact 8-pin package (U series)
- Typical single‑supply operation (or standard TI supply options per datasheet)
Note: For exact electrical specs, pinout, and supported formats, refer to the PCM1801U datasheet.

- Pin count: 16 pins (SOIC/SOIC-16 variant).
- Function: A stereo 24-bit analog-to-digital converter (ADC) with differential analog inputs (INL+/INL-, INR+/INR-) that outputs PCM digital data via an I2S/serial interface (BCLK, LRCLK/WS, DOUT), with required power, ground, reference, and control pins (e.g., AVDD/DVDD, AGND/DGND, RESET, PDWN).

- Manufacturer: Texas Instruments Incorporated (TI).
- What kind of company: An American multinational technology company that designs and manufactures semiconductors and integrated circuits; a leading global semiconductor firm.

PCM1801U is a stereo 24‑bit ADC used for high‑quality PCM audio capture. Common application areas:
- Consumer audio gear: DVD/Blu-ray players, digital recorders, AV receivers, sound bars
- Professional audio: audio interfaces, digital mixers, field/portable recorders
- Computer peripherals: external sound cards, USB audio interfaces, DAWs
- Automotive infotainment and telematics: in‑car audio front ends
- Embedded/industrial: voice capture, conferencing devices, VoIP endpoints

PCM1801U is in a 28-pin surface-mount package (SSOP-28 / SOIC-28).