LT1055

Manufacturer Part NumberLT1055
ManufacturerLinear Technology Corporation
LT1055 datasheet
 
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FEATURES
Guaranteed Offset Voltage: 150µV Max
–55°C to 125°C: 500µV Max
Guaranteed Drift: 4µV/°C Max
Guaranteed Bias Current
70°C: 150pA Max
125°C: 2.5nA Max
Guaranteed Slew Rate: 12V/µs Min
Available in 8-Pin PDIP and SO Packages
U
APPLICATIO 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
U
TYPICAL APPLICATIO
1Hz to 10kHz Voltage-to-Frequency Converter
4.7k
15V
10kHZ
TRIM
75k
5k
0V TO 10V
INPUT
0.1µF
22k
3.3M
2N3906
= 1N4148
0.1µF
*1% FILM
THE LOW OFFSET VOLTAGE OF LT1056
–15V
CONTRIBUTES ONLY 0.1Hz OF ERROR
WHILE ITS HIGH SLEW RATE PERMITS
10kHz OPERATION.
JFET Input Operational Amplifiers
DESCRIPTIO
®
The LT
1055/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
bandwidth product are simultaneously achieved with off-
set voltage of typically 50µV, 1.2µV/°C drift, bias currents
of 40pA at 70°C and 500pA at 125°C.
The 150µV 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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
3M
0.001 (POLYSTYRENE)
OUTPUT
15V
2
1Hz TO 10kHz
7
0.005%
1.5k
6
LINEARITY
LT1056
3
+
4
–15V
33pF
LM329
LT1055/56 TA01
LT1055/LT1056
Precision, High Speed,
U
Distribution of Input Offset Voltage
(H Package)
140
= ±15V
50% TO ±60µV
V
S
T
= 25°C
A
120
634 UNITS TESTED
FROM THREE RUNS
100
80
60
40
20
0
–200
200
–400
0
INPUT OFFSET VOLTAGE (µV)
LT1055/56 TA02
400
10556fc
1

LT1055 Summary of contents