dsp56f802ta80 Freescale Semiconductor, Inc, dsp56f802ta80 Datasheet - Page 15

• Manufacturer Part Number: dsp56f802ta80
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Notes:
Freescale Semiconductor
1.
2.
3.
4.
Junction to ambient
Natural convection
Junction to ambient (@1m/sec)
Junction to ambient
Natural convection
Junction to ambient (@1m/sec)
Junction to case
Junction to center of case
I/O pin power dissipation
Power dissipation
Junction to center of case
ADC reference voltage
Ambient operating temperature
1. VREF must be 0.3V below V
Theta-JA determined on 2s2p test boards is frequently lower than would be observed in an application.
Determined on 2s2p thermal test board.
Junction to ambient thermal resistance, Theta-JA (
specification JESD51-2 in a horizontal configuration in natural convection. Theta-JA was also simulated on
a thermal test board with two internal planes (2s2p where s is the number of signal layers and p is the number
of planes) per JESD51-6 and JESD51-7. The correct name for Theta-JA for forced convection or with the
non-single layer boards is Theta-JMA.
Junction to case thermal resistance, Theta-JC (R
using the cold plate technique with the cold plate temperature used as the "case" temperature. The basic cold
plate measurement technique is described by MIL-STD 883D, Method 1012.1. This is the correct thermal
metric to use to calculate thermal performance when the package is being used with a heat sink.
Thermal Characterization Parameter, Psi-JT (Ψ
thermocouple on top center of case as defined in JESD51-2. Ψ
temperature in steady state customer environments.
Characteristic
Characteristic
1
Table 3-2 Recommended Operating Conditions
DDA
Table 3-3 Thermal Characteristics
Four layer board (2s2p)
Four layer board (2s2p)
.
Comments
56F802 Technical Data, Rev. 9
Symbol
VREF
T
JT
θJC
A
), is the "resistance" from junction to reference point
R
), was simulated to be equivalent to the measured values
θJA
) was simulated to be equivalent to the JEDEC
Symbol
P
(2s2p)
R
R
R
R
R
P
Ψ
DMAX
P
θJMA
θJMA
θJMA
θJA
θJC
JT
I/O
Min
–40
D
JT
2.7
is a useful value to use to estimate junction
P
D
User Determined
= (I
(TJ - TA) /R
32-pin LQFP
Typ
DD
6
–
–
Value
50.2
47.1
38.7
37.4
17.8
3.07
x V
DD
θ
+ P
JA
V
Max
I/O
85
DDA
)
General Characteristics
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Unit
W
W
W
Unit
°C
V
Note
1,2
1,2
s
2
2
3
4
7
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