CRD4525 Просмотр технического описания (PDF) - Cirrus Logic

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Компоненты Описание

производитель

CRD4525

30 W Digital TV 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

PWM_SIG2

PWM_SIG1

TWR

ERRUVTE

ERROC

EN_TFB

I2S/LJ

SYS_CLK

TSTO

TSTI

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) - Used for shaping the output ramp time for half-bridge configured

outputs.

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

40

PWM Output (Output) - PWM switching signals.

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

and output ports. 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.

DS726A1

11

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