ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢀ ꢁꢂ ꢃ ꢄ ꢆꢅ ꢀ ꢁꢂ ꢃ ꢄ ꢇꢅ ꢀ ꢁꢂ ꢃ ꢈ ꢅ ꢀ ꢁꢂ ꢃ ꢈ ꢆ ꢅ ꢀꢁ ꢂꢃ ꢈꢇ
ꢆꢉꢊ ꢋꢌ ꢀꢆꢇꢁ ꢍ ꢎꢏ ꢍꢐꢑꢌ ꢑꢒ ꢓ ꢌꢔꢋ ꢓꢀ ꢏꢍ ꢕ ꢋꢁ ꢆꢀꢒ ꢏꢌ
SLVS543A – AUGUST 2004 − REVISED AUGUST 2004
TYPICAL CHARACTERISTICS
EQUIVALENT INPUT NOISE VOLTAGE
OVER A 10-S PERIOD
6
5
4
3
2
1
0
−1
−2
−3
−4
−5
−6
f = 0.1 to 10 Hz
I
T
= 10 mA
= 25°C
KA
A
0
1
2
3
4
5
6
7
8
9
10
t − Time − s
19.1 V
1 kΩ
910 Ω
500 µF
2000 µF
V
CC
V
CC
1 µF
TL431
(DUT)
TLE2027
= 10 V/mV
A
V
+
−
22 µF
TLE2027
To
820 Ω
16 Ω
+
Oscilloscope
16 kΩ
16 kΩ
1 µF
−
160 kΩ
33 kΩ
33 kΩ
A
V
= 2 V/V
0.1 µF
V
EE
V
EE
Figure 12. Test Circuit for Equivalent Input Noise Voltage
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
