AD5412ACPZ AD [Analog Devices], AD5412ACPZ Datasheet - Page 35

• Manufacturer Part Number: AD5412ACPZ
• Description: Single Channel, 12/16-Bit, Serial Input, Current Source & Voltage Output DAC
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
THERMAL AND SUPPLY CONSIDERATIONS
The AD5412/AD5422 is designed to operate at a maximum
junction temperature of 125°C. It is important that the device is
not operated under conditions that will cause the junction
temperature to exceed this value . Excessive junction
temperature can occur if the AD5412/AD5422 is operated from
the maximum AV
directly to ground. In this case the ambient temperature should
be controlled or AV
depend on the device package.
Table 25. Thermal and Supply considerations for each package
Maximum allowed power dissipation
when operating at an ambient
temperature of 85°C
Maximum allowed ambient
temperature when operating from a
supply of 40V and driving 24mA
directly to ground.
Maximum allowed supply voltage
when operating at an ambient
temperature of 85°C and driving 24mA
directly to ground.
Figure 67. Maximum Power Dissipation Vs Ambient Temperature
2.5
1.5
0.5
2
1
0
40
45
DD
DD
and driving the maximum current (24mA)
50
should be reduced. The conditions will
55
Ambient Temperature (°C)
60
65
TSSOP
T
J T
AI
T
J
J
DD
max
max
max
Θ
70
JA
×
−
−
−
Θ
P
T
T
D
JA
75
A
A
×
=
=
Θ
125
. 0
JA
80
125
027
TSSOP
LFCSP
42
−
=
−
85
125
×
85
85
Rev. PrF | Page 35 of 38
42
=
−
950
=
(
40
35
mW
×
V
. 0
027
At maximum ambient temperature of 85°C the 24-lead TSSOP
package can dissipate 950mW and the 40-lead LFCSP package
can dissipate 1.42W.
To ensure the junction temperature does not exceed 125°C
while driving the maximum current of 24mA directly into
ground (also adding an on-chip current of 3mA), AV
be reduced from the maximum rating to ensure the package is
not required to dissipate more power than stated above. See
Table 25, Figure 67 and Figure 68.
)
×
42
Figure 68. Maximum Supply Voltage Vs Ambient Temperature
45
43
41
39
37
35
33
31
29
27
25
=
25
79
°
C
35
LFCSP
T
J T
T
AI
J
J
max
DD
max
max
45
Θ
JA
−
×
Ambient Temperature (°C)
−
−
P
Θ
D
T
T
JA
A
A
×
55
Θ
=
=
JA
125
. 0
125
027
=
28
−
125
AD5412/AD5422
−
85
65
×
85
−
28
=
(
40
. 1
=
42
×
53
W
. 0
75
V
027
TSSOP
LFCSP
)
DD
×
28
should
85
=
85
°
C