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Linear Technology Electronic Components Datasheet

LT1056 Datasheet

JFET Input Operational Amplifiers

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LT1055/LT1056
Precision, High Speed,
JFET Input Operational Amplifiers
FEATURES
nn Guaranteed Offset Voltage: 150µV Max
–55°C to 125°C: 500µV Max
nn Guaranteed Drift: 4µV/°C Max
nn Guaranteed Bias Current
70°C: 150pA Max
125°C: 2.5nA Max
nn Guaranteed Slew Rate: 12V/µs Min
nn Available in 8-Pin PDIP and SO Packages
APPLICATIONS
nn Precision, High Speed Instrumentation
nn Logarithmic Amplifiers
nn D/A Output Amplifiers
nn Photodiode Amplifiers
nn Voltage-to-Frequency Converters
nn Frequency-to-Voltage Converters
nn Fast, Precision Sample-and-Hold
DESCRIPTION
The LT®1055/LT1056 JFET input operational amplifiers
combine precision specifications with high speed per-
formance.
For the first time, 16V/µs slew rate and 6.5MHz gain
bandwidth product are simultaneously achieved with offset
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.
TheLT1055and LT1056aredifferentiatedbytheiroperating
currents. The lower power dissipation LT1055 achieves
lower bias and offset currents and offset voltage. The ad-
ditional 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
1Hz to 10kHz Voltage-to-Frequency Converter
4.7k
15V
3M
0.001 (POLYSTYRENE)
0V TO 10V
INPUT
10kHz
TRIM
5k
75k
2N3906
= 1N4148
*1% FILM
–15V
0.1µF 22k
3.3M
2
15V
7
LT1056
3+ 4
–15V
33pF
6
OUTPUT
1Hz TO 10kHz
1.5k
0.005%
LINEARITY
LM329
0.1µF
THE LOW OFFSET VOLTAGE OF LT1056
CONTRIBUTES ONLY 0.1Hz OF ERROR
WHILE ITS HIGH SLEW RATE PERMITS
10kHz OPERATION.
LT1055/56 TA01
For more information www.linear.com/LT1055
Distribution of Input Offset Voltage
(H Package)
140 VS = ±15V
120
TA = 25°C
634 UNITS TESTED
FROM THREE RUNS
100
50% TO ±60µV
80
60
40
20
0
–400 –200
0
200 400
INPUT OFFSET VOLTAGE (µV)
LT1055/56 TA02
10556fd
1


Linear Technology Electronic Components Datasheet

LT1056 Datasheet

JFET Input Operational Amplifiers

No Preview Available !

LT1055/LT1056
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage ........................................................±20V
Differential Input Voltage.........................................±40V
Input Voltage ...........................................................±20V
Output Short-Circuit Duration........................... Indefinite
Operating Temperature Range
LT1055AM/LT1055M/LT1056AM/
LT1056M (OBSOLETE)....................... –55°C to 125°C
LT1055AC/LT1055C/LT1056AC/
LT1056C................................................... 0°C to 70°C
Storage Temperature Range
All Devices.......................................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
PIN CONFIGURATION
TOP VIEW
BAL 1
–IN 2
+IN 3
V4
8 N/C
7 V+
6 OUT
5 BAL
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, θJA = 130°C/W
TOP VIEW
NC
BALANCE 1 8 7 V +
–IN 2
6 OUT
+IN 3
5 BALANCE
4
V
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
OBSOLETE PACKAGE
Consider the N8 for Alternate Source
TOP VIEW
BAL 1
–IN 2
+IN 3
V4
8 N/C
7 V+
6 OUT
5 BAL
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W
10556fd
2 For more information www.linear.com/LT1055


Part Number LT1056
Description JFET Input Operational Amplifiers
Maker Linear
Total Page 20 Pages
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