LT1122C

Manufacturer Part NumberLT1122C
DescriptionLT1122CFast Setting, JFET input Operational Amplifier
ManufacturerLinear Technology Corporation
LT1122C datasheet
 


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S
FEATURE
100% Tested Settling Time
to 1mV at Sum Node, 10V Step
Tested with Fixed Feedback Capacitor
Slew Rate
Gain Bandwidth Product
Power Bandwidth (20Vp-p)
Unity Gain Stable; Phase Margin
Input Offset Voltage
Input Bias Current
25 C
70 C
Input Offset Current
25 C
70 C
Low Distortion
U
O
PPLICATI
A
S
Fast 12-Bit D/A Output Amplifiers
High Speed Buffers
Fast Sample and Hold Amplifiers
High Speed Integrators
Voltage to Frequency Converters
Active Filters
Log Amplifiers
Peak Detectors
U
O
TYPICAL
A
PPLICATI
12-Bit Voltage Output D/A Converter
+
C f
2
0mA TO 2mA
LT1122
OR 4mA
+
3
12-BIT CURRENT OUTPUT D/A CONVERTER
C = 5pF TO 17pF
f
(DEPENDING ON D/A CONVERTER USED)
Fast Settling, JFET Input
Operational Amplifier
D
ESCRIPTIO
340ns Typ
The LT1122 JFET input operational amplifier combines
540ns Max
high speed and precision performance.
A unique poly-gate JFET process minimizes gate series
60V/ s Min
resistance and gate-to-drain capacitance, facilitating wide
14MHz
bandwidth performance, without degrading JFET transis-
1.2 MHz
tor matching.
60
600 V Max
It slews at 80V/ s and settles in 340ns. The LT1122 is
75pA Max
internally compensated to be unity gain stable, yet it has a
600pA Max
bandwidth of 14MHz at a supply current of only 7mA. Its
40pA Max
speed makes the LT1122 an ideal choice for fast settling
150pA Max
12-bit data conversion and acquisition systems.
The LT1122 offset voltage of 120 V, and voltage gain of
500,000 also support the 12-bit accurate applications.
The input bias current of 10pA and offset current of 4pA
combined with its speed allow the LT1122 to be used in
such applications as high speed sample and hold amplifi-
ers, peak detectors, and integrators.
V
6
OUT
0V TO 10V
200ns/DIV
LT1122•TA01
AV = –1
LT1122
U
Large-Signal Response
1122 TA07
1

LT1122C Summary of contents