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LTZ1000 Datasheet(PDF) 6 Page - Linear Technology

Part # LTZ1000
Description  Ultra Precision Reference
Download  8 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTZ1000 Datasheet(HTML) 6 Page - Linear Technology

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LTZ1000/LTZ1000A
6
1000afd
Adjusting Temperature Coefficient in Unstabilized Applications
Typical applicaTions
+
7
5
4
3
2
3
120
LT1006
4
6
2
1
70k
15V
1N4148
VOUT+
0.022µF
R1
200*
HEATER
1N4148
1 MIN
1 MIN
OFF
ON
*
* PULSE HEATER ON AND OFF TO HEAT AND COOL THE REFERENCE. ADJUST
R1 FOR MINIMUM VOLTAGE CHANGE THROUGH A TEMPERATURE CYCLE.
THE –2mV/°C TEMPCO OF THE VBE CANCELS THE +2mV/°C TEMPCO OF THE ZENER.
1000 TA05
Averaging Reference Voltage for Lower Noise and Better Stability
Improving Supply Rejection
1.6k
VIN 15V
0.01%
OUTPUT
1.6k
30*
30*
150
150
*R = kT
q IC
1000 TA03
IC
VIN
15V
1.5k
150
SUPPLY REJECTION AT
VOUT2 = 3mV/V
SUPPLY REJECTION
AT VOUT1 = 20mV/V
VOUT2
VOUT1
50
1000 TA04
7V Positive Reference Circuit
+
+
2N3904
1N4148
1N4148
A2
LT1013
A1
LT1013
1M
1
1
7
5
3
3
4
4
8
8
5
7
6
1k
2
2
0.1µF
0.002µF
0.1µF
400k*
10k
R4
13k
R1
120
R3
70k
R2
70k
R5
1k
ZENER – SENSE
ZENER + SENSE
GROUND
ZENER – FORCE
HEATER RETURN
(TIED TO GROUND)
V+ 15V
*PROVIDES TC COMPENSATION, DELETE FOR LTZ1000A
APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm (0.01%) CHANGE IN RESISTOR VALUES:
R1
R2
R3
R4/R5 RATIO
∆R()
0.012
7
7
∆R = 0.01%
∆VZ
1ppm
0.3ppm
0.2ppm
1ppm
BOTH A1 AND A2 CONTRIBUTE LESS THAN 2µV OF OUTPUT DRIFT OVER A 50°C RANGE
1000 TA06


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