Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Hold Capacitor Short
Circuit Duration
10 sec
Lead Temperature (Note 4)
H package (Soldering, 10 sec.)
N package (Soldering, 10 sec.)
M package:
260˚C
260˚C
±
Supply Voltage
18V
Power Dissipation (Package
Limitation) (Note 2)
Operating Ambient Temperature Range
LF198/LF198A
Vapor Phase (60 sec.)
215˚C
220˚C
500 mW
Infrared (15 sec.)
Thermal Resistance (θJA) (typicals)
H package 215˚C/W (Board mount in still air)
85˚C/W (Board mount in
400LF/min air flow)
−55˚C to +125˚C
−25˚C to +85˚C
0˚C to +70˚C
LF298
LF398/LF398A
Storage Temperature Range
−65˚C to +150˚C
N package
M package
115˚C/W
106˚C/W
Input Voltage
Equal to Supply Voltage
Logic To Logic Reference
Differential Voltage (Note 3)
Output Short Circuit Duration
θJC (H package, typical) 20˚C/W
+7V, −30V
Indefinite
Electrical Characteristics
The following specifcations apply for −VS + 3.5V ≤ VIN ≤ +VS − 3.5V, +VS = +15V, −VS = −15V, TA = Tj = 25˚C, Ch = 0.01 µF,
RL = 10 kΩ, LOGIC REFERENCE = 0V, LOGIC HIGH = 2.5V, LOGIC LOW = 0V unless otherwise specified.
Parameter
Conditions
LF198/LF298
LF398
Typ
2
Units
Min
Typ
Max
Min
Max
7
Input Offset Voltage, (Note 5)
Input Bias Current, (Note 5)
Tj = 25˚C
1
3
5
mV
mV
nA
nA
Ω
Full Temperature Range
Tj = 25˚C
10
5
25
75
10
50
Full Temperature Range
Tj = 25˚C
100
Input Impedance
Gain Error
1010
1010
Tj = 25˚C, RL = 10k
Full Temperature Range
Tj = 25˚C, Ch = 0.01 µF
0.002 0.005
0.004 0.01
%
0.02
96
0.02
90
%
Feedthrough Attenuation Ratio
at 1 kHz
86
80
dB
Output Impedance
Tj = 25˚C, “HOLD” mode
Full Temperature Range
Tj = 25˚C, Ch = 0.01 µF, VOUT = 0
Tj≥25˚C
0.5
2
0.5
4
Ω
Ω
4
6
“HOLD” Step, (Note 6)
Supply Current, (Note 5)
Logic and Logic Reference Input
Current
0.5
4.5
2
2.0
5.5
10
1.0
4.5
2
2.5
6.5
10
mV
mA
µA
Tj = 25˚C
Leakage Current into Hold
Capacitor (Note 5)
Tj = 25˚C, (Note 7)
Hold Mode
30
100
30
200
pA
Acquisition Time to 0.1%
∆VOUT = 10V, Ch = 1000 pF
Ch = 0.01 µF
4
20
5
4
20
5
µs
µs
Hold Capacitor Charging Current
Supply Voltage Rejection Ratio
Differential Logic Threshold
VIN−VOUT = 2V
mA
dB
V
VOUT = 0
80
110
1.4
1
80
110
1.4
2
Tj = 25˚C
0.8
2.4
1
0.8
2.4
2
Input Offset Voltage, (Note 5)
Tj = 25˚C
mV
mV
nA
nA
Full Temperature Range
Tj = 25˚C
2
3
Input Bias Current, (Note 5)
5
25
75
10
25
50
Full Temperature Range
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