LT1055MHPBF(Rev_D) View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT1055MHPBF
(Rev.:Rev_D)

Precision, High Speed, JFET Input Operational Amplifiers

Linear Technology 

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.

The LT1055 and LT1056 are differentiated by their operating

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

3M

15V

0.001 (POLYSTYRENE)

10kHz

TRIM

0V TO 10V 5k

75k

INPUT

2N3906

= 1N4148

*1% FILM

–15V

0.1µF 22k

3.3M

2–

15V

7

6

LT1056

3+

4

–15V

33pF

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

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