ADM660/ADM8660
5
4.5
4
LOAD = 10mA
CHARGE-PUMP FREQUENCY – kHz
35
LOAD = 1mA
30
25
OUTPUT VOLTAGE – Volts
3.5
LOAD = 50mA
3
2.5
2
1.5
1
0.5
0
1
10
100
CHARGE-PUMP FREQUENCY – kHz
1000
LOAD = 80mA
20
15
10
LV = GND
FC = OPEN
C1, C2 = 10µF
5
0
–40
–20
0
20
40
TEMPERATURE –
°C
60
80
Figure 7. Output Voltage vs. Charge-Pump Frequency
Figure 10. Charge-Pump Frequency vs. Temperature
30
1k
OUTPUT SOURCE RESISTANCE –
Ω
25
CHARGE-PUMP FREQUENCY – kHz
100
FC = V+
LV = GND
20
15
10
FC = OPEN
LV = GND
10
1
5
0
1.5
0.1
2.5
3.5
4.5
SUPPLY VOLTAGE – Volts
5.5
6.5
1
10
100
CAPACITANCE – pF
1k
Figure 8. Output Source Resistance vs. Supply Voltage
Figure 11. Charge-Pump Frequency vs. External
Capacitance
140
30
LV = GND
CHARGE-PUMP FREQUENCY – kHz
LV = OPEN
20
FC = OPEN
OSC = OPEN
C1, C2 = 10µF
10
CHARGE-PUMP FREQUENCY – kHz
120
100
LV = GND
LV = OPEN
80
60
40
FC = V+
OSC = OPEN
C1, C2 = 2.2µF
20
0
0
1.5
2.5
4.5
3.5
5.5
SUPPLY VOLTAGE – Volts
6.5
3
3.5
4
4.5
5
5.5
6
SUPPLY VOLTAGE – Volts
6.5
7
Figure 9. Charge-Pump Frequency vs. Supply Voltage
Figure 12. Charge-Pump Frequency vs. Supply Voltage
REV. A
–5–
AD [ ANALOG DEVICES ]
