AD1984A soundmax hd audio codec with 4 dacs, 4 adcs, spdif out features 2 stereo headphone amplifiers line outputs and inputs analog microphone inputs retaskable ports 192 khz dacs/adcs ? 2 independent stereo dac/adc pairs ? simultaneous record of 2 stereo channels ? simultaneous playback of 2 stereo channels ? all independent sample rates, 8 khz through 192 khz ? 16-, 20-, and 24-bit resolution ? selectable stereo mixer on outputs stereo digital microphone interface ? two 192 khz digital microphone channels ? supports 1 or 2 microphones per pin ? selectable bit clock rates of 1.5 mhz, 2.0 mhz, and 3.0 mhz ? mono and stereo array support ? all sample rates, 8 khz through 192 khz ? 16-, 20-, and 24-bit resolution ? digital pcm gain control s/pdif output ? supports 44.1 hz through 192 khz sample rates ? 16-, 20-, and 24-bit data; pcm and ac3 formats ? digital pcm gain control auxiliary pins impedance and presence detection on all jacks full analog mixer with dac inputs 3 independent microphone bias pins digital and analog pcbeep 3 general-purpose digital i/o (gpio) pins 3.3 v analog supply voltage 1.7 v to 1.9 v or 3.3 v digital supply voltages 1.5 v or 3.3 v hd audio link signaling voltage advanced power management modes security feature prevents unauthorized recording 48-lead, rohs compliant qfn package software voice input enhancements output enhancements applications embedded audio point of sale systems overview the AD1984A audio codec and software provide superior high definition audio quality and performance. the AD1984A has two 192 kh z dac pairs, two 192 khz adc pairs, an s/pdif output, a 2-channel digital microphone interface, and digital and analog pcbeep. these features make the AD1984A the right choice for embedded systems where performance is key. the AD1984A is available in a 48-lead, rohs compliant lead frame chip scale package in both reels and trays. block diagram adc0 adc1 adc2 s/pdif tx s/pdif tx s/pdif rx s/pdif out 1 s/pdif out 2 (hdmi) s/pdif in digital and analog pcbeep hd audio interface gpio and eapd digital microphone dm_data dm_clk dac0 dac1 dac2 dac3 port f port g mono out port d port b port c port e por t a part number AD1984A description soundmax hd audio codec
ordering information table 1. performance characteristics parameter min typ max unit line-out drive (10 k loads?dac to pin) total harmonic distortion (thd + n) dynamic range (?60 db in ref to f s a-weighted) signal-to-noise ratio ?86 101 101 db db db headphone drive (32 loads?dac to pin) total harmonic distortion (thd + n) dynamic range (?60 db in ref to f s a-weighted) signal-to-noise ratio ?84 101 101 db db db input ports (mic boost = 0 db) total harmonic distortion (thd + n) dynamic range (?60 db in ref to f s a-weighted) signal-to-noise ratio ?80 92 92 db db db table 2. specifications parameter min typ max unit analog-to-digital converters resolution 24 bits gain error (full-scale span relative to nominal input voltage) 10 % interchannel gain mismatch (difference of gain errors) 0.2 0.5 db adc offset error 5mv adc crosstalk line inputs (input l, ground r, read r; input r, ground l, read l) ?94 db line inputs to other ?100 ?80 db digital-to-analog converters resolution 24 bits gain error (full-scale span relative to nominal input voltage) 10 % interchannel gain mismatch (difference of gain errors) 0.5 db dac crosstalk (input l, zero r, measure r_out; input r, zero l, measure l_out) ?104 db analog mixer signal-to-noise reduction (snr) input to output 95 db step size: all mixer inputs 1.5 db input gain/attenuation range: all mixer inputs ?34.5 +12.0 db device set order id package type package operating temperature AD1984Ajcpz* qfn 48-lead qfn, 7x7 mm 0c to 70c *lead-free (pb free) and rohs compliant ? 2012 conexant systems, inc. all rights reserved. conexant and the conexant logo are registered trademarks of conexant systems, inc. all other trademarks are owned by their respective owners. although conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. this material is provided as is and without any express or implied warranties, including merchant ability, fitness for a paparticular purpose and non-infringement. conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. www.conexant.com general information: u.s. and canada: (888) 855-4562 international: 1+ (949) 483-3000 headquarters 4000 macarthur blvd. newport beach, ca 92660 doc# pbr-203106
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