Datenblatt-pdf.com


LT1002CJ Schematic ( PDF Datasheet ) - Linear Technology

Teilenummer LT1002CJ
Beschreibung Dual / Matched Precision Operational Amplifier
Hersteller Linear Technology
Logo Linear Technology Logo 




Gesamt 16 Seiten
LT1002CJ Datasheet, Funktion
LT1002
Dual, Matched Precision
Operational Amplifier
FEATURES
s Guaranteed low offset voltage
LT1002A
60µV max
LT1002
100µV max
s Guaranteed offset voltage match
LT1002A
40µV max
LT1002
80µV max
s Guaranteed low drift
LT1002A 0.9µV/°C max
LT1002 1.3µV/°C max
s Guaranteed CMRR
LT1002A
110dB min
LT1002
110dB min
s Guaranteed channel separation
LT1002A
132dB min
LT1002
130dB min
s Guaranteed maching characteristics
s Low noise 0.35µV p-p
U
APPLICATIONS
s Thermocouple Amplifiers
s Strain Gauge Amplifiers
s Low level signal processing
s Medical instrumentation
s Precision dual limit threshold detection
s Instrumentation amplifiers
DESCRIPTION
The LT®1002 dual, matched precision operational amplifiers
combine excellent individual amplifier performance with tight
matching and temperature tracking between amplifiers.
In the design, processing, and testing of the device, particular
attention has been paid to the optimization of the entire
distribution of several key parameters and their matching.
Consequently, the specifications of even the low cost commer-
cial grade (the LT1002C) have been spectacularly improved
compared to presently available devices.
Essentially, the input offset voltage of all units is less than
80µV, and matching between amplifiers is consistently beter
than 60µV (see distribution plot below). Input bias and offset
currents, channel separation, common mode and power suply
rejections of the LT1002C are all specified at levels which were
previsouly attainable only on very expensive, selected grades
of other dual devices. Power dissipation is nearly halved
compared to the most popular precision duals, without ad-
versely affecting noise or speed performance. A by-product of
lower dissipation is decreased warm-up drift. For even better
performance in a single precision op amp, refer to the LT1001
data sheet. A bridge signal conditioning application is shown
below. This circuit illustrates the requirement for both excel-
lent matching and individual amplifier specifications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Strain Gauge Signal Conditioner with Bridge Excitation
+15V
8.2k
2.0K*
LM329
4+
1/2LT1002
4.99k* 3
13 2k
IN4148
350BRIDGE
+15V
1005W
2N2219
REFERENCE OUT
TO MONITORING
A/D CONVERTER
3+
6
* 10k LT1001
301k ZERO 2
1µF
10
1/2LT1002
11 +
IN4148
6 2k
2N2907
100
5W
–15V
GAIN
TRIM
*RN60C FILM RESISTORS
0 TO 10V
OUT
340k*
1.1k*
1002 TA01
Distribution of Offset Voltage Match
70
VS = ±15V
60 TA = 25°C
287 UNITS TESTED
50
40
30
20
10
0
–100 –80 –60 –40 –20 0 20 40 60 80 100
INPUT OFFSET VOLTAGE MATCH (µV)
1002 TA02
1






LT1002CJ Datasheet, Funktion
LT1002
TYPICAL PERFORMANCE CHARACTERISTICS
Matching and Individual Amplifier
Input Bias Current
Bias and Offset Currents vs Temperature Over the Common Mode Range
2.0 1.5
1.8 VS = ±15V
1.6
1.0 Ib +
VCM
1.4
MATCHING: NON INVERTING
1.2 BIAS CURRENT
0.5 DEVICE WITH POSITIVE INPUT CURRENT
1.0
0.8
0.6
0.4
0.2
INDIIVNIDDIUVAIDLUAAMLNPAOMMONAPF-TIFNCBSVHIEA.INTSOGFCC:FUUSINRREVRRTEEECRNNUITTNRGRE&NT
0
–50 –25 0 25 50 75 100 125
0 VS = ±15V
TA = 25°C
–.5
DEVICE WITH NEGATIVE INPUT CURRENT
–1.0
–1.5
–15
COMMON-MODE
INPUT RESISTANCE
=
02.18nVA=
280G
–10 –5 0 5 10 15
TEMPERATURE (°C)
COMMON-MODE INPUT VOLTAGE
1001 G10
1002 G11
Open Loop Voltage Gain
vs Temperature
1200k
1000k
800k
VS = ±15V, VO = ±12V
600k
400k
VS = ±3V, VO = ±1V
200k
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1002 G13
Open Loop Voltage Gain
Frequency Response
140
120
TA = 25°C
100
80
VS = ±15V
60
40
VS = ±3V
20
0
–20
0.1 1 10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
1002 G14
Open Loop Gain Mismatch
vs Frequency
1.0
VS = ±15V
TA = 25°C
0.8
Closed Loop Output Impedance
100
10
AV = 1000
0.6 1
0.4
0.2
0
1
PERCENT GAIN MISMATCH =
OUTPUT A – OUTPUT B × 100%
1/2(OUTPUT A + OUTPUT B)
0.1
0.01
10 100 1k 10k
FREQUENCY (Hz)
100k
1002 G16
0.001
1
AV = +1
IO = ±1mA
VS = ±15V
TA = 25°C
10 100 1k 10k
FREQUENCY (Hz)
100k
1002 G17
Input Bias Current vs.
Differential Input Voltage
30
VS = ±15V
TA = 25°C
20
10
IB 1 nA
0
0.1 0.3 1.0 3.0 10 30
± DIFFERENTIAL INPUT (VOLTS)
1002 G12
Gain, Phase Shift vs. Frequency
20 80
16
PHASE 25°C
100
12
25°C
8 PHASE
MARGIN
4
GAIN 125°C
= 60°
0 GAIN 25°C & –55°C
VS = ±15V
–4
PHASE MARGIN –55°C = 63°
–8 125°C = 57°
0.1 0.2
0.5
FREQUENCY (MHz)
1
120
140
160
180
200
220
2
1002 G15
Power Supply Rejection and
PSRR Match vs Frequency
160
VS = ±15V ±2V pp
140 TA = 25°C
MATCH (NEGATIVE SUPPLY)
120
100
80
60 NEGATIVE SUPPLY
POSITIVE SUPPLY
40
MATCH (POSITIVE SUPPLY)
20
0
0.1 1 10 100 1k 10k 100k
FREQUENCY (Hz)
1002 G18
6

6 Page









LT1002CJ pdf, datenblatt
LT1002
APPLICATIONS INFORMATION
Two Op Amp Instrumentation Amplifier
R1
100k*
INPUTS
+
R5
2.2k+
R2
10k
1/2 LT1002
+
R3
10k
R4
100k
1/2 LT1002
+
* TRIM FOR COMMON-MODE REJECTION
+ TRIM FOR GAIN
( )Gain = R4 1 + 1 R2 + R3 + R2 + R3 100
R3 2 R1 R4 R5
OUTPUT
1002 TA10
Precision Amplifier Drives 500Load to ±10V
RS
100
RS
100
1.1Rf + 0.1RS
110k
+15
B
1/2 LT1002
+
–15V
100
0.2RL
Rf
100k
+15V
A
1/2 LT1002
+
–15V
500
OUTPUT
RL
INPUT
1002 TA11
This application utilizes the guaranteed 10mA load driving
capability of the LT1002. The offset voltage of amplifier A
is the offset of the configuration. Amplifier B provides the
additional 10mA load current. When load resistor RL is
removed, amplifier A sinks this current without affecting
accuracy. In the gain of 1000 configuration shown, ap-
proximately 0.3% gain accuracy can be realized.
12

12 Page





SeitenGesamt 16 Seiten
PDF Download[ LT1002CJ Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LT1002CDual / Matched Precision Operational AmplifierLinear Technology
Linear Technology
LT1002CJDual / Matched Precision Operational AmplifierLinear Technology
Linear Technology
LT1002CNDual / Matched Precision Operational AmplifierLinear Technology
Linear Technology

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche