AD1877 is a single-supply, 16-bit single-channel ADC from Analog Devices. It features a fourth-order, 64-times oversampling modulator and a three-stage linear-phase decimator that effectively reduces quantization noise. The ADC has a dynamic range of 92 dB, a S/(THD+N) of 90 dB, and supports 256fs or 384fs input clocks. It consumes less than 100 mW of power and supports power-down mode. The ADC also includes input overrange indication, an on-chip voltage reference, and a flexible serial output interface. It is available in a 28-lead SOIC package.
The AD1877 is a stereo, 16‑bit oversampling ADC based on Sigma‑Delta technology, intended for digital audio applications. It operates from a single 5 V supply, provides up to 92 dB dynamic range, and features a flexible serial interface that can operate in master or slave mode.
Key features include a fourth‑order one‑bit modulator, a three‑stage FIR decimation filter with 64× oversampling, on‑chip voltage reference, and single‑ended to differential converters. The device requires four external 470 pF NPO filter capacitors and supports input clocks of 12.288 MHz (256×FS) or 18.432 MHz (384×FS).
| Supply Voltage | 5.0 V |
|---|---|
| Dynamic Range | 92 dB (Typ) |
| Signal‑to‑Noise Ratio (S/(THD+N)) | 90 dB (Typ) |
| Input Voltage High | 2.4 V |
| Input Voltage Low | 0.8 V |
| Analog Current | 35‑43 mA |
| Digital Current | 16‑20 mA |
| Decimation Factor | 64 |
| Passband Ripple | 0.006 dB |
| Stopband Attenuation | 90 dB |
The AD1877 operates from a single 5 V supply.
The AD1877 provides a typical dynamic range of 92 dB.
Four external 470 pF NPO ceramic capacitors are required.
The device accepts a 256×FS clock at 12.288 MHz or a 384×FS clock at 18.432 MHz.