Datasheet
LF442
www.ti.com
SNOSC03E –APRIL 1999–REVISED OCTOBER 2013
DC Electrical Characteristics
(1)(2)
LF442A LF442
Symbol Parameter Conditions Units
Min Typ Max Min Typ Max
V
OS
Input Offset Voltage R
S
= 10 kΩ, T
A
= 25°C 0.5 1.0 1.0 5.0 mV
Over Temperature 7.5 mV
ΔV
OS
/ΔT Average TC of Input Offset R
S
= 10 kΩ
7 10 7 μV/°C
Voltage
I
OS
Input Offset Current V
S
= ± 15V
(1)(3)
T
j
= 25°C 5 25 5 50 pA
T
j
= 70°C 1.5 1.5 nA
T
j
= 125°C 10 nA
I
B
Input Bias Current V
S
= ± 15V
(1)(3)
T
j
= 25°C 10 50 10 100 pA
T
j
= 70°C 3 3 nA
T
j
= 125°C 20 nA
R
IN
Input Resistance T
j
= 25°C 10
12
10
12
Ω
A
VOL
Large Signal Voltage Gain V
S
= ± 15V, V
O
= ±10V,
50 200 25 200 V/mV
R
L
= 10 kΩ, T
A
= 25°C
Over Temperature 25 200 15 200 V/mV
V
O
Output Voltage Swing V
S
= ± 15V, R
L
= 10 kΩ ±12 ±13 ±12 ±13 V
V
CM
Input Common-Mode ±16 +18 ±11 +14 V
Voltage Range −17 −12 V
CMRR Common-Mode Rejection R
S
≤ 10 kΩ
80 100 70 95 dB
Ratio
PSRR Supply Voltage Rejection See
(4)
80 100 70 90 dB
Ratio
I
S
Supply Current 300 400 400 500 μA
(1) Unless otherwise specified, the specifications apply over the full temperature range and for V
S
= ± 20V for the LF442A and for V
S
= ±15V
for the LF442. V
OS
, I
B
, and I
OS
are measured at V
CM
= 0.
(2) Refer to RETS442X for LF442MH military specifications.
(3) The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature,
T
j
. Due to limited production test time, the input bias currents measured are correlated to junction temperature. In normal operation the
junction temperature rises above the ambient temperature as a result of internal power dissipation, P
D
. T
j
= T
A
+ θ
jA
P
D
where θ
jA
is the
thermal resistance from junction to ambient. Use of a heat sink is recommended if input bias current is to be kept to a minimum.
(4) Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with
common practice from ± 15V to ±5V for the LF442 and ±20V to ±5V for the LF442A.
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