WM8775SEDS/R

Product Summary

The wm8775seds/r is a high performance, stereo audio ADC with a 4 channel input mixer. The wm8775seds/r is ideal for digitising multiple analogue sources for surround sound processing applications for home hi-fi, automotive and other audio visual equipment. A stereo 24-bit multi-bit sigma delta ADC is used with a four stereo channel input selector. Each channel has programmable gain control. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported. The audio data interface supports I2S, left justified, right justified and DSP digital audio formats. The wm8775seds/r is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including channel selection, volume controls, mutes, de-emphasis and power management facilities. The applications of the wm8775seds/r are (1)Surround Sound AV Processors and Hi-Fi systems; (2)Automotive Audio.

Parametrics

wm8775seds/r absolute maximum ratings: (1)Digital supply voltage: -0.3V to +3.63V; (2)Analogue supply voltage: -0.3V to +7V; (3)Voltage range digital inputs (MCLK, ADCLRC, BCLK, DI, CL, CE and ; (4)MODE): DGND -0.3V to DVDD + 0.3V; (5)Voltage range analogue inputs: AGND -0.3V to AVDD +0.3V; (6)Master Clock Frequency: 37MHz; (7)Operating temperature range, TA: -25°C to +85°C; (8)Storage temperature: -65°C to +150°C.

Features

wm8775seds/r features: (1)Audio Performance 102dB SNR (A weighted @ 48kHz); 90dB THD; (2)ADC Sampling Frequency: 32kHz – 96kHz; (3)Four stereo ADC inputs with analogue gain adjust from +24dB to –21dB in 0.5dB steps; (4)Digital gain adjust from -21.5dB to -103dB; (5)Programmable Automatic Level Control (ALC) or Limiter on ADC input; (6)3-Wire SPI Compatible or 2-wire Serial Control Interface; (7)Master or Slave Clocking Mode; (8)Programmable Audio Data Interface Modes: I2S, Left, Right Justified or DSP; 16/20/24/32 bit Word Lengths; (9)2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation.

Diagrams