WM8777 datasheet(11/102 Pages) WOLFSON

Part #	WM8777

Description	24 BIT 192KHZ AV RECEIVER ON A CHIP

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Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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WM8777

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PP Rev 1.94 November 2004

11

SUPPLY CURRENT

The supply current of the WM877 depends on the operating mode. For example, the supply current

is lower when the device is used for playback-only (ADC off) or recording-only (DACs off). The supply

currents for various operating modes are shown in Table 1 below.

SUPPLY CURRENT

MODE DESCRIPTION

AVDDDAC

AVDDADC

PVDD

DVDD

TOTAL

UNIT

On power-up, no clks applied

2.81

1.89

0.30

0.39

5.39

mA

On power-up, clks applied

2.81

1.89

0.30

1.70

6.70

mA

ADC

2.71

38.86

0.30

5.80

47.67

mA

All DACs

55.35

1.90

0.30

18.61

76.16

mA

ADC, All DACs

53.45

38.69

0.30

22.4

114.84

mA

ADC, All DACs, Osc

53.44

38.70

1.12

22.4

115.66

mA

ADC, All DACs, Osc, PLL

53.38

38.62

3.74

28.65

124.39

mA

ADC, All DACs, Osc, PLL, S/PDIF

53.38

38.62

3.43

29.89

125.32

mA

ADC, All DACs, Osc, PLL, S/PDIF, Tone

87.53

38.53

3.43

29.99

159.48

mA

ADC, All DACs, Osc, PLL, S/PDIF, Tone,

HP (16 Ohm)

146.60

38.42

3.44

29.99

218.45

mA

Power-down, no clks applied

0.028

0.172

0.30

0.39

0.89

mA

Power-down, clks applied

0.028

0.172

0.30

1.60

2.10

mA

Software RESET

2.80

1.88

0.3

0.95

5.93

mA

Table 1 Supply Current for Functional Blocks

Notes:

1.

DAC Analogue supply (AVDDDAC) = 5V.

2.

ADC Analogue supply (AVDDADC) = 5V.

3.

PLL Analogue supply (PVDD) = 5V.

4.

Digital supply (DVDD) = 3.3V.

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