低噪声,稳压型, -2V GaAsFET偏置
MAX840/MAX843/MAX844
____________________________Typical工作特性(续)
图2a (电路,V
IN
= 3.6V ,T
A
= + 25 ℃,除非另有说明。 )
振荡器频率
- 电源电压
MAX840-17
MAX844
振荡器频率与电源电压
29
27
25
T
A
= -40°C
23
21
19
17
15
10
SHDN = LOW
T
A
= +25°C, +85°C
MAX840-18
150
振荡器频率(kHz )
140
130
120
110
100
90
80
70
2
3
4
5
6
7
8
9
电源电压( V)
SHDN =高
T
A
= +25°C, +85°C
T
A
= -40°C
31
振荡器频率(kHz )
2
3
4
5
6
7
8
9
10
电源电压( V)
MAX840输出噪声和纹波
( C1 = C2 = C3 = 1μF , C4 = 10μF )
MAX840输出噪声和纹波
( C1 = C2 = C3 = 0.22μF , C4 = 4.7μF )
V
OUT
500µV/div
V
OUT
1mV/div
10µs/div
V
IN
= 3.6V, V
OUT
= -2V ,我
OUT
= 4mA时交流耦合
10µs/div
V
IN
= 3.6V, V
OUT
= -2V ,我
OUT
= 4mA时交流耦合
MAX843 / MAX844输出噪声和纹波
( C1 = C2 = C3 = 1μF , C4 = 10μF )
MAX843 / MAX844输出噪声和纹波
( C1 = C2 = C3 = 0.22μF , C4 = 4.7μF )
V
OUT
500µV/div
V
OUT
1mV/div
10µs/div
V
IN
= 3.6V, V
OUT
= -2V ,我
OUT
= 4mA时交流耦合
10µs/div
V
IN
= 3.6V, V
OUT
= -2V ,我
OUT
= 4mA时交流耦合
4
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