Removing the need for as many as 18 external components, the WM8523 and WM8524 ground-referenced D/A converters generate an output signal with less than 1-mV dc offset, so that no pop is produced — further removing the need for a mute circuit. The parts deliver 106-dB SNR, achieve 2-Vrms stereo output from a single 3.3-V supply, can drive a 1-kΩ line load, and support 24-bit conversion of all audio-sampling rates between 8 to 192 kHz, using all common MCLK fs rates.
The WM8523 is software controllable and configured either via the I2 C/SPI-compliant serial control interface providing –100- to 12-dB volume control. The WM8523 and WM8524 are also hardware controllable. Both devices are available in low-pin-count TSSOP packages, with the WM8523 also available in a space-sensitive QFN. (Ea/10,000: WM8523, from $0.97; from WM8524, $0.93 — available now.)
Wolfson Microelectronics , Edinburgh , U.K.
Sales 011-44-131-272-7000
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