LT1022_1 Datasheet, PDF (1/12 Pages) Linear Technology – High Speed, Precision JFET Input Operational Amplifier

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}
U
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
C_F
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
C_F = 15pF TO 33pF
SETTLING TIME TO 2mV (0.8 LSB) = 1.5µs TO 2µs
LT1022 • TA01
Large-Signal Response
A_V = 1
C_L = 100pF
T_A = 25°C
V_S = ±15V
0.5µs/DIV
1022fa
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