
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
10
______________________________________________________________________________________
V
IN
V
OUT
LM4050-5.0V
STARTUP CHARACTERISTICS
LM4050 toc13
040
50
20 30
10
60
70 80 90
RESPONSE TIME (
s)
5V
0
4V
2V
RS = 16k
SEE FIGURE 2.
0.1k
10k
1k
100k
1M
LM4050-2.5V
OUTPUT IMPEDANCE vs. FREQUENCY
LM4050
toc14
FREQUENCY (Hz)
IMPEDANCE
(
)
1000
0.1
1
10
100
IR = 150
A
IR = 1mA
C1 = 1
F
C1 = 0
Typical Operating Characteristics (continued)
(IR = 100A, SC70-3 package, TA = +25°C, unless otherwise noted.)
V
IN
V
OUT
LM4050-2.5V
STARTUP CHARACTERISTICS
LM4050 toc12
016
20
812
424
28 32 36
RESPONSE TIME (
s)
5V
0
2V
1V
RS = 30k
SEE FIGURE 2.
1
100
10
1k
10k
LM4050-2.5V
NOISE vs. FREQUENCY
LM4050
toc16
FREQUENCY (Hz)
10,000
100
1000
NOISE
(nV/
√
Hz)
1
100
10
1k
10k
LM4050-5.0V
NOISE vs. FREQUENCY
LM4050
toc17
FREQUENCY (Hz)
10,000
100
1000
NOISE
(nV/
√
Hz)
0.1k
10k
1k
100k
1M
LM4050-5.0V
OUTPUT IMPEDANCE vs. FREQUENCY
LM4050
toc15
FREQUENCY (Hz)
IMPEDANCE
(
)
100
0.1
1
10
IR = 150
A
IR = 1mA
C1 = 0
C1 = 1
F
RS
VIN
1Hz RATE
50%
DUTY CYCLE
VR
Figure 2. Startup Characteristics Test Circuit