MAX840 Maxim, MAX840 Datasheet - Page 4

• Manufacturer Part Number: MAX840
• Description: Low-Noise / Regulated / -2V GaAsFET Bias
• Manufacturer: Maxim

Low-Noise, Regulated, -2V GaAsFET Bias
(Circuit of Figure 2a, V
4
____________________________Typical Operating Characteristics (continued)
_______________________________________________________________________________________
V
V
MAX843/MAX844 OUTPUT NOISE AND RIPPLE
IN
150
140
130
120
110
100
IN
70
90
80
= 3.6V, V
= 3.6V, V
MAX840 OUTPUT NOISE AND RIPPLE
2
(C1 = C2 = C3 = 1 F, C4 = 10 F)
(C1 = C2 = C3 = 1 F, C4 = 10 F)
OUT
OUT
3
IN
OSCILLATOR FREQUENCY
= -2V, I
= -2V, I
vs. SUPPLY VOLTAGE
T
= 3.6V, T
4
SUPPLY VOLTAGE (V)
A
= +25°C, +85°C
10 s/div
10 s/div
OUT
5
OUT
= 4mA, AC COUPLED
= 4mA, AC COUPLED
6
A
= +25°C, unless otherwise noted.)
SHDN = HIGH
T
7
A
= -40°C
8
9
10
V
500 V/div
V
500 V/div
OUT
OUT
V
V
MAX843/MAX844 OUTPUT NOISE AND RIPPLE
IN
IN
31
29
27
25
23
21
19
17
15
= 3.6V, V
OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE
= 3.6V, V
(C1 = C2 = C3 = 0.22 F, C4 = 4.7 F)
(C1 = C2 = C3 = 0.22 F, C4 = 4.7 F)
MAX840 OUTPUT NOISE AND RIPPLE
2
OUT
OUT
3
= -2V, I
= -2V, I
T
4
SUPPLY VOLTAGE (V)
A
= +25°C, +85°C
10 s/div
10 s/div
OUT
5
OUT
MAX844
= 4mA, AC COUPLED
= 4mA, AC COUPLED
6
T
A
SHDN = LOW
7
= -40°C
8
9
10
V
1mV/div
V
1mV/div
OUT
OUT