CS4353_09 Datasheet, PDF (4/26 Pages) Cirrus Logic – 3.3 V Stereo Audio DAC with 2 VRMS Line Output

1. PIN DESCRIPTIONS
CS4353
24 23 22 21 20 19
SCLK 1
MCLK 2
VL ³
DGND 4
FLYP- 5
VCP 6
Thermal Pad
Top-Down (Through Package) View
24-Pin QFN Package
18 VBIAS
17 VA
16 AGND
15 AOUTA
14 AOUT_REF
13 AOUTB
7 8 9 10 11 12
Pin Name Pin #
Pin Description
SCLK
1 Serial Clock (Input) - Serial clock for the serial audio interface.
MCLK
2 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
VL
3 Serial Audio Interface Power (Input) - Positive power for the serial audio interface
DGND
4 Digital Ground (Input) - Ground reference for the digital section.
FLYP+
FLYP-
7 Step-up Charge Pump Cap Positive/Negative Nodes (Output) - Positive and Negative nodes for the
5 step-up charge pump’s flying capacitor.
VCP
6
Charge Pump and Digital Core Logic Power (Input) - Positive power supply for the step-up and invert-
ing charge pumps as well as the digital core logic sections.
VFILT+
8
Step-up Charge Pump Filter Connection (Output) - Power supply from the step-up charge pump that
provides the positive rail for the output amplifiers
FLYN+
FLYN-
9 Inverting Charge Pump Cap Positive/Negative Nodes (Output) - Positive and Negative nodes for the
11 inverting charge pump’s flying capacitor.
CPGND
10 Charge Pump Ground (Input) - Ground reference for the Charge Pump section.
VFILT-
12
Inverting Charge Pump Filter Connection (Output) - Power supply from the inverting charge pump that
provides the negative rail for the output amplifiers.
AOUTB
AOUTA
13 Analog Outputs (Output) - The full-scale analog line output level is specified in the Analog Characteris-
15 tics table.
AOUT_REF
14
Pseudo Diff. Analog Output Reference (Input) - Ground reference for the analog output amplifiers.
This pin must be at the same nominal DC voltage as the AGND pin.
AGND
16 Analog Ground (Input) - Ground reference for the low voltage analog section.
4
DS803F1