LF198/LF298/LF398, LF198A/LF398A
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
±
18V
Supply Voltage
Power Dissipation (Package
Limitation) (Note 2)
500 mW
Operating Ambient Temperature Range
LF198/LF198A
−55˚C to +125˚C
LF298
−25˚C to +85˚C
LF398/LF398A
0˚C to +70˚C
Storage Temperature Range
−65˚C to +150˚C
Input Voltage
Equal to Supply Voltage
Logic To Logic Reference
Differential Voltage (Note 3)
+7V, −30V
Output Short Circuit Duration
Indefinite
Hold Capacitor Short
Circuit Duration
Lead Temperature (Note 4)
H package (Soldering, 10 sec.)
N package (Soldering, 10 sec.)
M package:
Vapor Phase (60 sec.)
Infrared (15 sec.)
Thermal Resistance (θ
JA
) (typicals)
H package 215˚C/W (Board mount in still air)
85˚C/W (Board mount in
400LF/min air flow)
N package
115˚C/W
M package
106˚C/W
θ
JC
(H package, typical) 20˚C/W
10 sec
260˚C
260˚C
215˚C
220˚C
Electrical Characteristics
The following specifcations apply for −V
S
+ 3.5V
≤
V
IN
≤
+V
S
− 3.5V, +V
S
= +15V, −V
S
= −15V, T
A
= T
j
= 25˚C, C
h
= 0.01 µF,
R
L
= 10 kΩ, LOGIC REFERENCE = 0V, LOGIC HIGH = 2.5V, LOGIC LOW = 0V unless otherwise specified.
Parameter
Input Offset Voltage, (Note 5)
Input Bias Current, (Note 5)
Input Impedance
Gain Error
Feedthrough Attenuation Ratio
at 1 kHz
Output Impedance
“HOLD” Step, (Note 6)
Supply Current, (Note 5)
Logic and Logic Reference Input
Current
Leakage Current into Hold
Capacitor (Note 5)
Acquisition Time to 0.1%
Hold Capacitor Charging Current
Supply Voltage Rejection Ratio
Differential Logic Threshold
Input Offset Voltage, (Note 5)
Input Bias Current, (Note 5)
T
j
= 25˚C, (Note 7)
Hold Mode
∆V
OUT
= 10V, C
h
= 1000 pF
C
h
= 0.01 µF
V
IN
−V
OUT
= 2V
V
OUT
= 0
T
j
= 25˚C
T
j
= 25˚C
Full Temperature Range
T
j
= 25˚C
Full Temperature Range
5
80
0.8
4
20
5
110
1.4
1
2.4
1
2
25
75
10
80
0.8
4
20
5
110
1.4
2
2.4
2
3
25
50
µs
µs
mA
dB
V
mV
mV
nA
nA
30
100
30
200
pA
T
j
= 25˚C, “HOLD” mode
Full Temperature Range
T
j
= 25˚C, C
h
= 0.01 µF, V
OUT
= 0
T
j
≥25˚C
T
j
= 25˚C
0.5
4.5
2
0.5
2
4
2.0
5.5
10
1.0
4.5
2
0.5
4
6
2.5
6.5
10
Ω
Ω
mV
mA
µA
T
j
= 25˚C
Full Temperature Range
T
j
= 25˚C
Full Temperature Range
T
j
= 25˚C
T
j
= 25˚C, R
L
= 10k
Full Temperature Range
T
j
= 25˚C, C
h
= 0.01 µF
86
96
10
10
Conditions
Min
LF198/LF298
Typ
1
5
Max
3
5
25
75
Min
LF398
Typ
2
10
10
10
Units
Max
7
10
50
100
mV
mV
nA
nA
Ω
0.01
0.02
%
%
dB
0.002
0.005
0.02
80
0.004
90
www.national.com
2
NSC [ NATIONAL SEMICONDUCTOR ]
