ICM7211 Datasheet, PDF (8/12 Pages) Intersil Corporation – 4-Digit, ICM7211 (LCD) and ICM7212 (LED) Display Drivers

ICM7211, ICM7212
Typical Performance Curves
30
LCD DEVICES, TEST CIRCUIT
DISPLAY BLANK, PIN 36 OPEN
25
T_A = -20^oC
20
T_A = 25^oC
15
10
T_A = 70^oC
5
1
2
3
4
5
6
7
V_SUPP (V)
FIGURE 3. ICM7211 OPERATING SUPPLY CURRENT AS A
FUNCTION OF SUPPLY VOLTAGE
180 _{LCD DEVICES, TA = 25oC}
150
C_OSC = 0pF
(PIN 36 OPEN)
120
C_OSC = 22pF
90
60
30
C_OSC = 220pF
0
1
2
3
4
5
6
V_SUPP (V)
FIGURE 4. ICM7211 BACKPLANE FREQUENCY AS A
FUNCTION OF SUPPLY VOLTAGE
15 _{PIN 5 AT VDD, TA = 25oC}
V_SUPP = 6V
10
V_SUPP = 5V
5
V_SUPP = 4V
0
1
2
3
4
5
6
V_O (V)
FIGURE 5. ICM7212 LED SEGMENT CURRENT AS A
FUNCTION OF OUTPUT VOLTAGE
12
SEGMENT OUTPUT AT +3V
T_A = 25^oC
10
8
6
4
2
0
0
1
2
3
4
5
6
VOLTAGE ON BRT PIN 5 (V)
FIGURE 6. ICM7212 LED SEGMENT CURRENT AS A
FUNCTION OF BRIGHTNESS CONTROL VOLTAGE
1800
1500
LED DEVICES, DISPLAY ALL EIGHTS
LED FORWARD VOLTAGE DROP
V_FLED = 1.7V, PIN 5 AT V_DD, T_A = 25^oC
1200
900
600
300
0
4
5
6
V_SUPP (V)
FIGURE 7. ICM7212 OPERATING POWER (LED DISPLAY) AS A FUNCTION OF SUPPLY VOLTAGE
9-13