Datasheet

LF155, LF156, LF355, LF356, LF357
www.ti.com SNOSBH0C –MAY 2000–REVISED MARCH 2013
AC Electrical Characteristics
T
A
= T
J
= 25°C, V
S
= ±15V
LF155/355 LF156/256/ LF156/256/356/ LF257/357
356B LF356B
Symbol Parameter Conditions Units
Typ Min Typ Typ
SR Slew Rate LF155/6: A
V
=1, 5 7.5 12 V/μs
LF357: A
V
=5 50 V/μs
GBW Gain Bandwidth Product 2.5 5 20 MHz
t
s
Settling Time to 0.01%
(1)
4 1.5 1.5 μs
e
n
Equivalent Input Noise R
S
=100Ω
Voltage
f=100 Hz 25 15 15 nV/√Hz
f=1000 Hz 20 12 12 nV/√Hz
i
n
Equivalent Input Current f=100 Hz 0.01 0.01 0.01 pA/√Hz
Noise
f=1000 Hz 0.01 0.01 0.01 pA/√Hz
C
IN
Input Capacitance 3 3 3 pF
(1) Settling time is defined here, for a unity gain inverter connection using 2 kΩ resistors for the LF155/6. It is the time required for the error
voltage (the voltage at the inverting input pin on the amplifier) to settle to within 0.01% of its final value from the time a 10V step input is
applied to the inverter. For the LF357, A
V
= −5, the feedback resistor from output to input is 2kΩ and the output step is 10V (See Settling
Time Test Circuit).
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