Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
MAX850–MAX853
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 2a, V
IN
= 6V, T
A
= +25°C, unless otherwise noted.)
MAX850–MAX852
OUTPUT NOISE AND RIPPLE
MAX853
OUTPUT NOISE AND RIPPLE
V
OUT
500µV/div
V
OUT
500µV/div
10µs/div
V
IN
= 6.0V, V
OUT
= -4.1V, I
OUT
= 5mA, AC COUPLED
10µs/div
V
IN
= 6.0V, V
OUT
= -4.1V, I
OUT
= 5mA, AC COUPLED
MAX850–MAX852
NOISE SPECTRUM
70
60
50
NOISE (dBµV)
NOISE (dBµV)
40
30
20
10
0
-10
-20
-30
0.1
1.0
10
FREQUENCY (kHz)
100
1000
70
60
50
40
30
20
10
0
-10
-20
-30
0.1
1.0
MAX853
NOISE SPECTRUM
10
FREQUENCY (kHz)
100
1000
NOTE: dBµV = 20 log V
OUT
1µV
4
______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
