资 源 简 介
The AD1871 is a stereo audio ADC intended for digital audioapplicaTIons requiring high performance analog-to-digitalconversion. It features two 24-bit conversion channels eachwith programmable gain amplifier (PGA), mulTIbit sigma-deltamodulator, and decimaTIon filters. Each channel provides 105 dbof dynamic range, making the AD1871 suitable for applicaTIonssuch as digital audio recorders and mixing consoles.Each of the AD1871’s input channels (left and right) can beconfigured as either differential or single-ended (two inputsmuxed with internal single-ended-to-differential conversion).The input PGA features a gain range of 0 dB to 12 dB in stepsof 3 dB. The Σ-Δ modulator features a proprietary multibitarchitecture that realizes optimum performance over an audiobandwidth with standard audio sampling rates of 32 kHz up to96 kHz. The decimation filter response features very low passbandripple and excellent stop-band attenuation.The AD1871’s audio data interface supports all common interfaceformats such as I2S, left-justified, right-justified as well as othermodes that allow for convenient connection to general-purposedigital signal processors (DSPs). The AD1871 also features anSPI compatible serial control port that allows for convenientcontrol of device parameters and functionality such as sampleword-width, PGA settings, interface modes, and so on.The AD1871 operates from a single 5 V power supply—withan optional digital interfacing capability of 3.3 V. It is housed ina 28-lead SSOP package and is characterized for operationover the temperature range –40°C to +105°C.
