LTZ1000_06 Datasheet, PDF (5/8 Pages) Linear Technology – Ultra Precision Reference

TYPICAL APPLICATIONS
Negative Voltage Reference
LTZ1000/LTZ1000A
1
2N3904
2
5
1k
7
LT1013
6
0.1µF
10k
R4
13k
8
R3
70k
3
4
1M
7
0.1µF
400k*
R5
R1
1k
120
*PROVIDE TEMPERATURE COMPENSATION, DELETE FOR LTZ1000A
APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm CHANGE IN RESISTOR VALUES:
R1
R2
R3
R4/R5 RATIO
100ppm = ∆R(Ω)
0.012Ω
7Ω
7Ω
∆R = 0.01%
∆V_Z
1ppm
0.3ppm
0.2ppm
1ppm
BOTH A1 AND A2 CONTRIBUTE LESS THAN 2µV OF OUTPUT DRIFT OVER A 50°C RANGE
R2
70k
5
ZENER + SENSE
V⁺ 15V
GND
2_–
8
LT1013
3₊
4
0.022µF
1
1N4148
ZENER – FORCE
V ^– ≥ 10V
ZENER – SENSE
1000 TA02
Averaging Reference Voltage for Lower Noise and Better Stability
V_IN 15V
0.01%
1.6k
1.6k
30Ω*
30Ω*
150Ω
OUTPUT
I_C
150Ω
*R = ^kT
q I_C
1000 TA03
Improving Supply Rejection
V_IN ^1.5k
15V
V_OUT1
SUPPLY REJECTION
AT V_OUT1 = 20mV/V
50Ω
V_OUT2
SUPPLY REJECTION AT
V_OUT2 = 3mV/V
150Ω
1000 TA04
1000afb
5