CRD4525-D1 Просмотр технического описания (PDF) - Cirrus Logic

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CRD4525-D1

30 W Digital Audio Amplifier with Integrated ADC

Cirrus Logic 

LVD

DGND

VD_REG

VD

VA_REG

AGND

FILT+

VQ

AFILTL

AFILTR

AINL

AINR

OCREF

PGND

RAMP_CAP

VP

OUT4

OUT3

OUT2

OUT1

TSTO

TWR

ERRUVTE

ERROC

EN_TFB

I2S/LJ

SYS_CLK

TSTO

TSTI

Thermal Pad

CS4525

VD Voltage Level Indicator (Input) - Identifies the voltage level attached to VD. When applying

9 5.0 V to VD, LVD must be connected to VD. When applying 2.5 V or 3.3 V to VD, LVD must be con-

nected to DGND.

10 Digital Ground (Input) - Ground for the internal logic and I/O.

11 Core Logic Power (Output) - Internally generated low voltage power supply for digital logic.

12 Digital Power (Input) - Positive power supply for the internal regulators and digital I/O.

13 Analog Power (Output) - Internally generated positive power for the analog section and I/O.

14 Analog Ground (Input) - Ground reference for the internal analog section and I/O.

15

Positive Voltage Reference (Output) - Positive reference voltage for the internal ADC sampling

circuits.

16 Common Mode Voltage (Output) - Filter connection for internal common mode voltage.

17

18

Antialias Filter Connection (Output) - Antialias filter connection for ADC inputs.

19 Analog Input (Input) - The full-scale input level is specified in the ADC Analog Characteristics

20 specification table.

21 Over Current Reference Setting (Input) - Sets the reference for over current detection.

22,23

27,28

33,34

37,38

Power Ground (Input) - Ground for the individual output power half-bridge devices.

24 Output Ramp Capacitor (Input) - This pin should be connected directly to VP in hardware mode.

25,30,

31,36

High Voltage Power (Input) - High voltage power supply for the individual half-bridge devices.

26

29

32

PWM Output (Output) - Amplified PWM power outputs.

35

39 Test Output (Output) - These pins are outputs used for the Logic Level PWM switching signals

40 available only in software mode. They must be left unconnected for hardware mode operation.

41 Thermal Warning Output (Output) - Thermal warning output.

42

Thermal and Undervoltage Error Output (Output) - Error flag for thermal shutdown and under-

voltage.

43 Overcurrent Error Output (Output) - Overcurrent error flag.

44 Enable Thermal Feedback (Input) - Enables the thermal foldback feature when high.

45

I²S/Left Justified (Input) - Selects between I²S and Left-Justified data format for the serial input

port. Selects I²S when high and LJ when low.

46 System Clock (Input/Output) -Clock source for the delta-sigma modulators.

47

Test Output (Output) - This pin is an output used for the crystal oscillator driver available only in

software mode. It must be left unconnected for normal hardware mode operation.

48

Test Input (Input) - This pin is an input used for the crystal oscillator driver available only in soft-

ware mode. It must be tied to digital ground for normal hardware mode operation.

-

Thermal Pad - Thermal relief pad for optimized heat dissipation. See “QFN Thermal Pad” on

page 65 for more information.

DS726PP1

11

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