uA9638C-EP
SLLSEA4A
–
DECEMBER 2011
–
REVISED DECEMBER 2011
THERMAL INFORMATION
uA9638C
THERMAL METRIC
θ
JA
θ
JC
θ
JB
ψ
JT
ψ
JB
(1)
(2)
(3)
(4)
(5)
Junction-to-ambient thermal resistance
(2)
Junction-to-case thermal resistance
Junction-to-board thermal resistance
(3)
Junction-to-top characterization parameter
(4)
(1)
D
8 PINS
114.3
59.1
55.3
12.7
54.7
UNITS
°C/W
Junction-to-board characterization parameter
(5)
For more information about traditional and new thermal metrics, see the
IC Package Thermal Metrics
application report,
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
The junction-to-top characterization parameter,
ψ
JT
, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining
θ
JA
, using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-board characterization parameter,
ψ
JB
, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining
θ
JA
, using a procedure described in JESD51-2a (sections 6 and 7).
DISSIPATION RATINGS
PACKAGE
D
POWER RATING
T
A
= 25°C
(mW)
725
DERATING FACTOR
T
A
>
70°C
(mW/°C)
8.75
POWER RATING
T
A
= 85°C
(mW)
199
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
-40
4.75
2
0.8
-50
50
85
NOM
5
MAX
5.25
UNIT
V
V
V
mA
mA
°C
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
V
IK
V
OH
V
OL
|V
OD1
|
|V
OD2
|
Δ|V
OD
|
V
OC
(1)
(2)
(3)
Input clamp voltage
High level output voltage
Low level output voltage
Magnitude of differential output voltage
Magnitude of differential output voltage
Change in magnitude of differential output
voltage
(2)
Common-mode output voltage
(3)
TEST CONDITIONS
V
CC
= 4.75 V, I
I
=
−18
mA
V
CC
= 4.75 V,
V
IH
= 2 V,
V
IL
= 0.8 V
I
OH
=
−10
mA
I
OH
=
−40
mA
2.5
2
0.5
1.25 x
V
OD2
2
±0.4
3
MIN
TYP
(1)
-1
3.5
V
V
V
V
V
V
MAX
-1.2
UNIT
V
V
CC
= 4.75 V, V
IH
= 2 V, V
IL
= 0.8 V,
I
OL
= 40 mA
V
CC
= 5.25 V, I
O
= 0 A
V
CC
= 4.75 V to 5.25 V, R
L
= 100
Ω,
See
V
CC
= 4.75 V to 5.25 V, R
L
= 100
Ω,
See
V
CC
= 4.75 V to 5.25 V, R
L
= 100
Ω,
See
All typical values are at V
CC
= 5 V and T
A
= 25°C.
Δ|V
OD
| and
Δ|V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input is changed from a high level
to a low level or vice versa.
In Standard EIA-422-A, V
OC
, which is the average of the two output voltages with respect to ground, is called output offset voltage, V
OS
.
3
Copyright
©
2011, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
