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LT1055 Datasheet(PDF) 1 Page - Linear Technology

Part No. LT1055
Description  Precision, High Speed, JFET Input Operational Amplifiers
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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1
LT1055/LT1056
Precision, High Speed,
JFET Input Operational Amplifiers
+
0V TO 10V
INPUT
10kHZ
TRIM
5k
4.7k
15V
2N3906
15V
–15V
LT1055/56 TA01
–15V
= 1N4148
3M
0.001 (POLYSTYRENE)
0.1µF
THE LOW OFFSET VOLTAGE OF LT1056
CONTRIBUTES ONLY 0.1Hz OF ERROR
WHILE ITS HIGH SLEW RATE PERMITS
10kHz OPERATION.
0.1µF
22k
1.5k
LM329
3.3M
7
6
4
3
2
33pF
*1% FILM
OUTPUT
1Hz TO 10kHz
0.005%
LINEARITY
LT1056
DESCRIPTION
FEATURES
s
Guaranteed Offset Voltage
150
µV Max
–55
°C to 125°C
500
µV Max
s
Guaranteed Drift
4
µV/°C Max
s
Guaranteed Bias Current
70
°C
150pA Max
125
°C
2.5nA Max
s
Guaranteed Slew Rate
12V/
µs Min
APPLICATIONS
s
Precision, High Speed Instrumentation
s
Logarithmic Amplifiers
s
D/A Output Amplifiers
s
Photodiode Amplifiers
s
Voltage-to-Frequency Converters
s
Frequency-to-Voltage Converters
s
Fast, Precision Sample-and-Hold
The LT1055/LT1056 JFET input operational amplifiers
combine precision specifications with high speed perfor-
mance.
For the first time, 16V/
µs slew rate and 6.5MHz gain-ban-
width product are simultaneously achieved with offset
voltage of typically 50
µV, 1.2µV/°C drift, bias currents of
40pA at 70
°C and 500pA at 125°C.
The 150
µV maximum offset voltage specification is the
best available on any JFET input operational amplifier.
The LT1055 and LT1056 are differentiated by their operat-
ing currents. The lower power dissipation LT1055 achieves
lower bias and offset currents and offset voltage. The
additional power dissipation of the LT1056 permits higher
slew rate, bandwidth and faster settling time with a slight
sacrifice in DC performance.
The voltage-to-frequency converter shown below is one of
the many applications which utilize both the precision and
high speed of the LT1055/LT1056.
For a JFET input op amp with 23V/
µs guaranteed slew rate,
refer to the LT1022 data sheet.
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
Distribution of Input Offset Voltage
(H Package)
0kHz to 10kHz Voltage-to-Frequency Converter
INPUT OFFSET VOLTAGE (
µV)
0
20
60
80
100
140
–400
0
200
LT1055/56 TA02
40
120
400
–200
VS = ±15V
TA = 25°C
634 UNITS TESTED
FROM THREE RUNS
50% TO
±60µV




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