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LT1055C Datasheet

  • LT1055C

  • Precision, High Speed, JFET Input Operational Amplifiers

  • 12頁

  • LINER

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LT1055/LT1056
Precision, High Speed,
JFET Input Operational Amplifiers
FEATURES
s
s
s
DESCRIPTION
150碌V Max
500碌V Max
4碌V/擄C Max
150pA Max
2.5nA Max
12V/碌s Min
The LT1055/LT1056 JFET input operational amplifiers
combine precision specifications with high speed perfor-
mance.
For the first time, 16V/碌s slew rate and 6.5MHz gain-ban-
width product are simultaneously achieved with offset
voltage of typically 50碌V, 1.2碌V/擄C drift, bias currents of
40pA at 70擄C and 500pA at 125擄C.
The 150碌V 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/碌s guaranteed slew rate,
refer to the LT1022 data sheet.
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
s
Guaranteed
Offset Voltage
鈥?5擄C to 125擄C
Guaranteed
Drift
Guaranteed
Bias Current
70擄C
125擄C
Guaranteed
Slew Rate
APPLICATIONS
s
s
s
s
s
s
s
Precision, High Speed Instrumentation
Logarithmic Amplifiers
D/A Output Amplifiers
Photodiode Amplifiers
Voltage-to-Frequency Converters
Frequency-to-Voltage Converters
Fast, Precision Sample-and-Hold
TYPICAL APPLICATION
0kHz to 10kHz Voltage-to-Frequency Converter
4.7k
15V
3M
140
0.001 (POLYSTYRENE)
10kHZ
TRIM
5k
OUTPUT
1Hz TO 10kHz
0.005%
LINEARITY
120
NUMBER OF UNITS
100
80
60
40
20
0.1碌F
0
鈥?5V
THE LOW OFFSET VOLTAGE OF LT1056
CONTRIBUTES ONLY 0.1Hz OF ERROR
WHILE ITS HIGH SLEW RATE PERMITS
10kHz OPERATION.
鈥?00
鈥?00
200
400
0
INPUT OFFSET VOLTAGE (碌V)
LT1055/56 TA02
LT1055/56 TA01
0V TO 10V
INPUT
2
+
鈥?/div>
33pF
15V
7
LT1056
6
4
鈥?5V
1.5k
0.1碌F
22k
3
3.3M
2N3906
= 1N4148
*1% FILM
LM329
U
U
U
Distribution of Input Offset Voltage
(H Package)
V
S
=
鹵15V
T
A
= 25擄C
634 UNITS TESTED
FROM THREE RUNS
50% TO
鹵60碌V
1

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