Datasheet LT1022 (Linear Technology)

LT1022 High Speed, Precision JFET Input Operational Amplifier
U FEATURES DESCRIPTIO
■ Guaranteed Slew Rate: 23V/µs Min The LT®1022 JFET input operational amplifier combines ■ Guaranteed Offset Voltage: 250µV Max high speed and precision performance. – 55°C to 125°C: 750µV Max A 26V/µs slew rate and 8.5MHz gain-bandwidth product ■ Guaranteed Drift: 5µV/°C Max are simultaneously achieved with offset voltage of ■ Guaranteed Bias Current: typically 80µV, 1.5µV/°C drift, bias currents of 50pA at 70°C, 180pA Max 70°C, 500pA at 125°C. The output delivers 20mA of load 125°C, 4nA Max current without gain degradation. ■ Gain-Bandwidth Product: 8.5MHz Typ ■ Settling Time to 0.05% (10V Step): 0.9µs Typ The 250µV maximum offset voltage specification represents less than 1/2 least significant bit error in a
U
14-bit, 10V system.
APPLICATIO S
The LT1022A meets or exceeds all OP-16A and OP-16E ■ Fast D/A Output Amplifiers (12, 14, 16 Bits) specifications. It is faster and more accurate without ■ High Speed Instrumentation stability problems at cold temperatures. ■ Fast, Precision Sample and Hold The LT1022 can be used as the output amplifier for 12-bit ■ Voltage-to-Frequency Converters current output D/A converters, as shown below. ■ Logarithmic Amplifiers 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.
U TYPICAL APPLICATIO 12-Bit Voltage Output D/A Converter Large-Signal Response
CF 15V 2 – 7 0mA TO 2mA 6 OUTPUT OR 4mA LT1022 5V/DIV 0V TO 10V 3 + 12-BIT CURRENT OUTPUT D/A 4 CONVERTER (e.g., 6012, 565 OR DAC-80) –15V A 0.5 V = 1 µs/DIV CF = 15pF TO 33pF C SETTLING TIME TO 2mV (0.8 LSB) = 1.5µs TO 2µs L = 100pF T LT1022 • TA01 A = 25°C VS = ±15V 1022fa 1