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CS4970X4 Scheda tecnica(PDF) 11 Page - Cirrus Logic

Il numero della parte CS4970X4
Spiegazioni elettronici  High Definition Audio Decoder DSP Family with Dual 32-bit DSP Engine Technology
Download  34 Pages
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4970X4 Scheda tecnica(HTML) 11 Page - Cirrus Logic

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DS752PP8
Copyright 2009 Cirrus Logic
11
CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
5.4 Power Supply Characteristics
(Measurements performed under operating conditions.)
5.5 Thermal Data (144-Pin LQFP)
5.6 Thermal Data (128-pin LQFP)
Notes: 1.Two-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz copper covering 20% of the top and bottom
layers.
2.Four-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz copper covering 20% of the
top and bottom layers and 0.5-oz copper covering 90% of the internal power plane and ground plane layers.
3.To calculate the die temperature for a given power dissipation
Τ
j = Ambient Temperature + [ (Power Dissipation in Watts) * θja ]
4.To calculate the case temperature for a given power dissipation
Τ
c = Τj - [ (Power Dissipation in Watts) * ψ jt ]
Input leakage current (all digital pins with internal pull-
up resistors enabled, and XTI)
IIN-PU
--
70
μA
Parameter
Min
Typ
Max
Unit
Power supply current:
Core and I/O operating: VDD1
PLL operating: VDDA
With external memory and most ports operating: VDDIO
1.Dependent on application firmware and DSP clock speed.
-
-
-
500
3.5
120
-
-
-
mA
mA
mA
Parameter
Symbol
Min
Typ
Max
Unit
Thermal Resistance (Junction to Ambient)
Two-layer Board1
Four-layer Board2
θ
ja
-
-
48
40
-
-
°C / Watt
Thermal Resistance (Junction to Top of Package)
Two-layer Board1
Four-layer Board2
ψ
jt
-
-
.39
.33
-
-
°C / Watt
Parameter
Symbol
Min
Typ
Max
Unit
Thermal Resistance (Junction to Ambient)
Two-layer Board1
Four-layer Board2
θ
ja
-
-
53
44
-
-
°C / Watt
Thermal Resistance (Junction to Top of Package)
Two-layer Board1
Four-layer Board2
ψ
jt
-
-
.45
.39
-
-
°C / Watt
Parameter
Symbol
Min
Typ
Max
Unit


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