參數(shù)資料
型號: 20068
英文描述: and Am29243? EH Controller Data Sheet
中文描述: 和Am29243?高血壓控制器數(shù)據(jù)表
文件頁數(shù): 33/36頁
文件大小: 428K
代理商: 20068
P R E L I M I N A R Y
33
Am29240 EH Microcontroller Series
SWITCHING TEST CIRCUIT
V
Am29240EH Microcontroller
Pin Under Test
V
L
I
OL
= 3.2 mA *
VREF = 1.5 V
I
OH
= 400
μ
A *
C
L
V
H
Note:
*All outputs except MEMCLK. MEMCLK is tested with I
OL
= 20 mA and I
OH
= –20mA.
THERMAL CHARACTERISTICS
The Am29240EH microcontroller series is specified for
operation with case temperature ranges for a commercial
temperature device. Case temperature is measured at
the top center of the PQFP package as shown in Figure
13.
éééé
θ
JA
θ
CA
θ
JC
T
C
θ
JA
=
θ
JC
+
θ
CA
Figure 13. Thermal Resistance —
°
C/Watt
The various temperatures and thermal resistances can
be determined using the equations shown in Figure 14
along with information given in Table 2. (The variable P
is power in watts.)
θ
JA
=
θ
JC
+
θ
CA
P = I
CCOP
freq
V
CC
T
J
= T
C
+ P
θ
JC
T
J
= T
A
+ P
θ
JA
T
C
= T
J
– P
θ
JC
T
C
= T
A
+ P
θ
CA
T
A
= T
J
– P
θ
JA
T
A
= T
C
– P
θ
CA
Figure 14. Thermal Characteristics Equations
Table 2. Thermal Characteristics (
°
C/Watt) Surface Mounted
Parameter
°
C/Watt
θ
JA
θ
JC
θ
CA
Junction-to-Ambient
38
Junction-to-Case
8
Case-to-Ambient
30
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