PCM182x Burr-Brown™ Audio ADCs Texas Instruments PCM182x Burr-Brown™ Audio ADCs support simultaneous sampling of up to two analog channels. The PCM182x features differential line and microphone inputs with a 2VRMS full-scale signal. The PCM1820 offers a 123dB dynamic range enhancer enabled and 113dB dynamic range enhancer disabled. The PCM1821 delivers a 106dB dynamic range and a –95dB THD+N.