LT1013/LT1014
APPLICATIONS INFORMATION
Low Supply Operation
The minimum supply voltage for proper operation of the
LT1013/1014 is 3.4V (three Ni-Cad batteries). Typical
supply current at this voltage is 290µA, therefore power
dissipation is only one milliwatt per amplifier.
100Ω*
For applications information on noise testing and calcula-
tions, please see the LT1007 or LT1008 data sheet.
50k*
*RESISTOR MUST HAVE LOW
THERMOELECTRIC POTENTIAL.
**THIS CIRCUIT IS ALSO USED AS THE BURN-IN
CONFIGURATION, WITH SUPPLY VOLTAGES
INCREASED TO
±20V.
V
O
= 1000V
OS
TYPICAL APPLICATIONS
50MHz Thermal rms to DC Converter
100k*
5V Single Supply Dual Instrumentation Amplifier
+5V
0.01
30k*
10k
30k*
3
1µF
1/2 LTC1043
300Ω*
10k*
0.01
0.01
INPUT
300mV–
10V
RMS
BRN
RED
1µF
RED
BRN
T1A
GRN
T1B
T2B
GRN
T2A
10k*
2% ACCURACY, DC–50MHz.
100:1 CREST FACTOR CAPABILITY.
* 0.1% RESISTOR.
T1–T2 = YELLOW SPRINGS INST. CO. THERMISTOR COMPOSITE #44018.
ENCLOSE T1 AND T2 IN STYROFOAM.
7.5mW DISSIPATION.
+
10k
12
–
13
LT1014
14
10
20k
FULL-
SCALE
TRIM
10k
9
–
10k*
+
100k*
10k*
5
–
+
–
2
+INPUT
1
10k*
10k*
6
LT1014
2
6
+5V
4
LT1014
11
7
1µF
3
–INPUT
18
15
1/2 LTC1043
+INPUT
7
8
3
11
+
LT1014
8
0V–4V
OUTPUT
1µF
12
–INPUT
13
16
14
0.01
+
Noise Testing
–
U
W
U
U
U
Test Circuit for Offset Voltage and
Offset Drift with Temperature
50k*
+15V
V
O
LT1013
OR LT1014
–15V
+5V
5
5
+
–
8
7
OUTPUT A
R2
1/2 LT1013
6
1µF
4
R1
+
1/2 LT1013
1
OUTPUT B
R2
2
1µF
–
R1
OFFSET = 150µV
GAIN = R2 + 1.
R1
CMRR = 120dB.
COMMON-MODE RANGE IS 0V TO 5V.
9
LINER [ LINEAR TECHNOLOGY ]
