CS42L51 Datasheet, PDF (8/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
DAC_FILT+
ADC_FILT+
VQ
MICIN1/
AIN3A
MICIN2/
BIAS/AIN3B
AIN2A
AIN2B/BIAS
AFILTA
AFILTB
AIN1A
AIN1B
RESET
VL
VD
DGND
SDOUT
(M/S)
MCLK
SCLK
SDIN
Thermal Pad
14 Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.
16
15 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
17 Microphone Input 1 (Input) - The full-scale level is specified in the ADC Analog Characteristics specifi-
cation table.
18 Microphone Input 2 (Input/Output) - The full-scale level is specified in the ADC Analog Characteristics
specification table. This pin can also be configured as an output to provide a low noise bias supply for an
external microphone. Electrical characteristics are specified in the DC Electrical Characteristics table.
19 Analog Input (Input) - The full-scale level is specified in the ADC Analog Characteristics specification
table.
20 Analog Input (Input/Output) - The full-scale level is specified in the ADC Analog Characteristics specifi-
cation table. This pin can also be configured as an output to provide a low noise bias supply for an exter-
nal microphone. Electrical characteristics are specified in the DC Electrical Characteristics table.
21 Filter Connection (Output) - Filter connection for the ADC inputs.
22
23 Analog Input (Input) - The full-scale level is specified in the ADC Analog Characteristics specification
24 table.
25 Reset (Input) - The device enters a low power mode when this pin is driven low.
26 Digital Interface Power (Input) - Determines the required signal level for the serial audio interface and
host control port. Refer to the Recommended Operating Conditions for appropriate voltages.
27 Digital Power (Input) - Positive power for the internal digital section.
28 Digital Ground (Input) - Ground reference for the internal digital section.
29 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
Serial Port Master/Slave (Input/Output) - Hardware Mode Startup Option: Selects between master and
slave mode for the serial port.
30 Master Clock (Input) -Clock source for the delta-sigma modulators.
31 Serial Clock (Input/Output) - Serial clock for the serial audio interface.
32 Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
- Thermal relief pad for optimized heat dissipation. See “QFN Thermal Pad” on page 77.
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DS679A2