MAX840 Maxim, MAX840 Datasheet - Page 3

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

(Circuit of Figure 2a, V
__________________________________________Typical Operating Characteristics
5
4
3
2
1
0
2
-2.070
-2.060
-2.050
-2.040
120
100
3
80
60
40
20
N0-LOAD SUPPLY CURRENT
0
0
4
2
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
Low-Noise, Regulated, -2V GaAsFET Bias
1
(CIRCUIT OF FIG 2d)
MAXIMUM OUTPUT CURRENT
5
_______________________________________________________________________________________
3
IN
V
2
OUT
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
6
= 3.6V, T
4
vs. INPUT VOLTAGE
OUTPUT VOLTAGE
INPUT VOLTAGE (V)
3
< -1.95V
7
5
(CIRCUIT OF FIG 2a)
4
V
OUT
8
5
6
A
< -1.95V
= +25°C, unless otherwise noted.)
6
7
9
7
10
8
8
9
9
10
10
7
6
5
4
3
2
1
0
High-current operation not
recommended for extended
periods of time.
-40
V
V
OUT
OUT
(CIRCUIT OF FIG 2d)
(CIRCUIT OF FIG 2a)
SUPPLY CURRENT vs. TEMPERATURE
< 2mVp-p RIPPLE
< 2mVp-p RIPPLE
-20
V
IN
= 10V
0
TEMPERATURE (°C)
V
IN
20
= 3.6V
40
-2.065
-2.060
-2.055
-2.050
-2.045
-2.040
60
30
25
20
15
10
5
0
80
2
2
NEGOUT CURRENT vs. INPUT VOLTAGE
OUTPUT VOLTAGE vs. INPUT VOLTAGE
T
V
A
NEGOUT
100
3
= +85°C
3
T
A
OVER TEMPERATURE
= +25°C
4
4
= 0.9 x V
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
5
5
T
2.8
2.4
2.0
1.6
1.2
0.8
0.4
A
NEGOUT(NO LOAD)
= -40°C
6
6
2
START-UP TIME vs. INPUT VOLTAGE
7
7
SHUTDOWN
3
(MAX844)
8
8
4
INPUT VOLTAGE (V)
9
9
5
10
10
6
7
8
9
10
3