LT1022| Datasheet

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LT1022 High Speed, Precision JFET Input Operational Amplifier

FEATURES

DESCRIPTIO

Guaranteed Slew Rate: 23V/us Min Guaranteed Offset Voltage: 250uV Max 55 C to 125 C: 750uV Max Guaranteed Drift: 5uV/ 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): 0.9us Typ

The LT 1022 JFET input operational amplifier combines high speed and precision performance. A 26V/us slew rate and 8.5MHz gain-bandwidth product are simultaneously achieved with offset voltage of typically 80uV, 1.5uV/ C drift, bias currents of 50pA at 70 C, 500pA at 125 C. The output delivers 20mA of load current without gain degradation. The 250uV 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.

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

TYPICAL APPLICATIO

12-Bit Voltage Output D/A Converter
CF 2 0mA TO 2mA OR 4mA 3 12-BIT CURRENT OUTPUT D/A CONVERTER (e.g., 6012, 565 OR DAC-80) 15V

Large-Signal Response

LT1022

6

OUTPUT 0V TO 10V

+

4 15V

5V/DIV

7

CF = 15pF TO 33pF SETTLING TIME TO 2mV (0.8 LSB) = 1.5us TO 2us
LT1022 TA01

AV = 1 CL = 100pF TA = 25 C VS = 15V

U
0.5us/DIV
1022fa

U

U

1

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LT1022 DATASHEET