LT1122C Linear Technology Corporation, LT1122C Datasheet

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LT1122C

Manufacturer Part Number
LT1122C
Description
LT1122CFast Setting, JFET input Operational Amplifier
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURE
A
TYPICAL
12-BIT CURRENT OUTPUT D/A CONVERTER
C = 5pF TO 17pF
(DEPENDING ON D/A CONVERTER USED)
查询LT1122供应商
f
PPLICATI
100% Tested Settling Time
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
Input Offset Current
Low Distortion
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
0mA TO 2mA
to 1mV at Sum Node, 10V Step
OR 4mA
12-Bit Voltage Output D/A Converter
S
A
O
PPLICATI
U
S
+
C f
2
3
O
+
25 C
70 C
25 C
70 C
U
LT1122
6
60V/ s Min
600 V Max
600pA Max
150pA Max
540ns Max
340ns Typ
75pA Max
40pA Max
1.2 MHz
V
0V TO 10V
14MHz
OUT
LT1122•TA01
60
D
The LT1122 JFET input operational amplifier combines
high speed and precision performance.
A unique poly-gate JFET process minimizes gate series
resistance and gate-to-drain capacitance, facilitating wide
bandwidth performance, without degrading JFET transis-
tor matching.
It slews at 80V/ s and settles in 340ns. The LT1122 is
internally compensated to be unity gain stable, yet it has a
bandwidth of 14MHz at a supply current of only 7mA. Its
speed makes the LT1122 an ideal choice for fast settling
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.
ESCRIPTIO
Fast Settling, JFET Input
Operational Amplifier
200ns/DIV
AV = –1
Large-Signal Response
U
1122 TA07
LT1122
1

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LT1122C Summary of contents

Page 1

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 ...

Page 2

... Supply Voltage .................................................... Differential Input Voltage ...................................... 40V Input Voltage ........................................................ 20V Output Short Circuit Duration .......................... Indefinite Lead Temperature (Soldering, 10 sec.)................. 300 C U PACKAGE/ORDER I FOR ATIO TOP VIEW V SPEED BOOST TRIM OVERCOMP + LT1122AMJ8 LT1122CCJ8 –IN LT1122 + OUT LT1122BMJ8 LT1122DCJ8 – ...

Page 3

... LT1122AM/BM LT1122CC/DC LT1122AC/BC LT1122CS/DS MIN TYP MAX MIN TYP MAX 12 12.5 12 12.5 11.5 12 11.5 12 7 LT1122CC/DC LT1122AC/BC LT1122CS/DS MIN TYP MAX MIN TYP MAX 350 1400 400 2000 150 15 200 80 600 90 800 120 380 100 340 ...

Page 4

... SETTLING TIME OUTPUT (20 TIMES SUM NODE OUTPUT) 1.5k 1N5712 *THIS RESISTOR CAN BE ADJUSTED TO NULL OUT ALL OFFSETS AT THE SETTLING TIME OUTPUT. THE AUTOMATED TESTER USES A SEPARATE AUTOZERO CIRCUIT. LT1122CC/DC LT1122AC/BC LT1122CS/DS MIN TYP MAX MIN TYP MAX 450 1900 500 2700 6 20 ...

Page 5

W U TYPICAL PERFOR A Settling Time (Input From –10V to 0V) 100ns/DIV 1122 G01 Settling Time (Input From 0V to –10V) 100ns/DIV 1122 G04 Voltage Gain vs Frequency 120 V = ±15V S 100 T = 25° ...

Page 6

LT1122 W U TYPICAL PERFOR A Distribution of Input Offset Voltage 800 V = 15V 3370 UNITS TESTED ALL PACKAGES A (NOT WARMED UP) 600 400 200 0 –900 –500 –100 100 500 INPUT ...

Page 7

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of circuits as described herein will not infringe on existing patent rights. W ...

Page 8

LT1122 LT1122 U TYPICAL APPLICATIONS 47k 4kHz J CUT DISTORTION 430pF TRIM 50k 560k – LT1122 + –15V 20k OUTPUT DC = RMS VALUE OF INPUT BANDWIDTH WITH 10Vp-p INPUT = 2MHz PACKAGE DESCRIPTION Please see the ...

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