LT1022M 查看數據表（PDF） - Linear Technology

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LT1022M

High Speed, Precision JFET Input Operational Amplifier

Linear Technology 

LT1022

High Speed, Precision

JFET Input Operational Amplifier

FEATURES

■ Guaranteed Slew Rate: 23V/µs Min

■ Guaranteed Offset Voltage: 250µV Max

– 55°C to 125°C: 750µV Max

■ Guaranteed Drift: 5µV/°C Max

■ Guaranteed Bias Current:

70°C, 180pA Max

125°C, 4nA Max

■ Gain-Bandwidth Product: 8.5MHz Typ

■ Settling Time to 0.05% (10V Step): 0.9µs Typ

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APPLICATIO S

■ Fast D/A Output Amplifiers (12, 14, 16 Bits)

■ High Speed Instrumentation

■ Fast, Precision Sample and Hold

■ Voltage-to-Frequency Converters

■ Logarithmic Amplifiers

DESCRIPTIO

The LT®1022 JFET input operational amplifier combines

high speed and precision performance.

A 26V/µs slew rate and 8.5MHz gain-bandwidth product

are simultaneously achieved with offset voltage of

typically 80µV, 1.5µV/°C drift, bias currents of 50pA at

70°C, 500pA at 125°C. The output delivers 20mA of load

current without gain degradation.

The 250µV maximum offset voltage specification

represents less than 1/2 least significant bit error in a

14-bit, 10V system.

The LT1022A meets or exceeds all OP-16A and OP-16E

specifications. It is faster and more accurate without

stability problems at cold temperatures.

The LT1022 can be used as the output amplifier for 12-bit

current output D/A converters, as shown below.

For a more accurate, lower power dissipation, but slower

JFET input op amp, please refer to the LT1055 data sheet.

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

12-Bit Voltage Output D/A Converter

CF

15V

2

–

7

0mA TO 2mA

OR 4mA

12-BIT CURRENT OUTPUT D/A

LT1022

3+

4

6

OUTPUT

0V TO 10V

CONVERTER (e.g., 6012, 565 OR DAC-80)

–15V

CF = 15pF TO 33pF

SETTLING TIME TO 2mV (0.8 LSB) = 1.5µs TO 2µs

LT1022 • TA01

Large-Signal Response

AV = 1

CL = 100pF

TA = 25°C

VS = ±15V

0.5µs/DIV

1022fa

1

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