The PCM1870 is a low-power stereo ADC designed for portable digital audio applications, with line-input amplifier, boost amplifier, microphone bias, programmable gain control, sound effects, and auto level control (ALC). It is available in 24-QFN (4-mm × 5-mm) and 24-DSBGA (2.49-mm × 3.49-mm) packages to save footprint. The PCM1870 accepts right-justified, left-justified, I2S, and DSP formats, providing easy interfacing to audio DSP and encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a 2- or 3-wire serial control port.
Analog Front End:
Stereo Single End Input With MUX
Mono Differential Input
Stereo Programmable Gain Amplifier
Microphone Boost Amplifier and Bias
Analog Performances Dynamic Range: 90 dB
Power-Supply Voltage
1.71 V to 3.6 V for Digital I/O Section
1.71 V to 3.6 V for Digital Core Section
2.4 V to 3.6 V for Analog Section
Low Power Dissipation:
13 mW in Record, 1.8/2.4 V, 48 kHz, Stereo
5.3 mW in Record, 1.8/2.4 V, 8 kHz, Mono
3.3 µW in All Power Down
Sampling Frequency: 5 kHz to 50 kHz
Auto Level Control for Recording
Operation by Single Clock Input Without PLL
System Clock: Common Audio Clock (256 fS/384 fS), 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
