AD1871 is a stereo audio ADC produced by Analog Devices. It supports 24-bit, 96kHz, multibit Σ-Δ modulator, with “Perfect Differential Linearity Restoration” feature, which can reduce idle tones and noise floor. It supports 256/512 and 768 fS master clocks, flexible serial data port allows right-justified, left-justified, I2S compatible and DSP serial port modes. It can be cascaded (up to four devices) from a single DSP SPORT device, and can be controlled via SPI compatible serial port or optional control pins.
The AD1871 stereo audio ADC is intended for high‑performance digital audio applications such as mixing consoles, digital recorders and home‑theater systems. It provides two 24‑bit conversion channels with programmable gain and supports both differential and single‑ended inputs. Key features include a 5 V supply, 105 dB A‑weighted dynamic range, 96 kHz maximum sample rate, multiple serial data formats (I²S, left‑justified, right‑justified, DSP), and an SPI‑compatible control port. The device is supplied in a 28‑lead SSOP package and operates from –40 °C to +105 °C.