CS47048 Data Sheet

Audio SOC Processor Family

14

Copyright 2008 Cirrus Logic

DS787A7

5.4 Power Supply Characteristics

5.5 Thermal Data (100-Pin LQFP with Exposed Pad)

Parameter

Min

Typ

Max

Unit

Operational Power Supply Current:

VDDA: PLL operating current

VDDA: DAC operating current (all 8 channels enabled)

VDDA: ADC operating current (all 4 channels enabled)

VDDIO: With most ports operating

Total Operational Power Dissipation:

Standby Power Supply Current:

VDD: Core and I/O not clocked

VDDA: PLLs halted

VDDA: DAC disabled

VDDA: ADC disabled

VDDIO: All connected I/O pins 3-stated by other ICs in system

Total Standby Power Dissipation:

1. Dependent on application firmware and DSP clock speed.

-

-

-

-

-

-

-

-

-

-

325

16

56

34

27

1025

140

1.2

100

10

0.4

620

-

-

-

-

-

-

-

-

-

-

mA

mA

mA

mA

mA

mW

μA

μA

μA

μA

μA

μW

Parameter

Symbol

Min

Typ

Max

Unit

Thermal Resistance (Junction to Ambient)

1. To calculate the die temperature for a given power dissipation:

Τ

2. To calculate the case temperature for a given power dissipation:

Τ

of the top & bottom layers.

of the top & bottom layers and 0.5-oz. copper covering 90% of the internal power plane & ground plane layers.

θ

ja

-

-

34

18

-

-

°C / Watt

Thermal Resistance (Junction to Top of Package)

ψ

jt

-

-

0.54

.28

-

-

°C / Watt