Rainbow-electronics MAX1495 Bedienungsanleitung PDF herunterladen (Seite 14)

MAX1491/MAX1493/MAX1495

3.5- and 4.5-Digit, Single-Chip

ADCs with LCD Drivers

14 ______________________________________________________________________________________

φ1 φ2 φ3 φ1' φ2' φ3'

V+

V-

V+

V-

V+

V-

V+

V-

V+

V-

V+

V-

V+

V-

LCD

BP1

BP2

BP3

ALL

OFF

a, d ON

g OFF

a, g ON

d OFF

g, d ON

a OFF

FREQUENCY = 107Hz

φ1, φ2, φ3 - - BP HIGH WITH RESPECT TO SEGMENT (BP+ TIME)

φ1', φ2', φ3' - - BP LOW WITH RESPECT TO SEGMENT (BP- TIME)

BP1 ACTIVE DURING φ1 AND φ1'

BP2 ACTIVE DURING φ2 AND φ2'

BP3 ACTIVE DURING φ3 AND φ3'

V+ = DV

, V

= 2/3 DV

= 1/3 V

LCD

, V- = GND

LCD

= DV

- GND

Figure 10. LCD Voltage Waveform—Combinations 5–8 (BP1/2/3, SEGa/d/g)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 24 25

MAX1491/MAX1493/MAX1495 1
ADCs with LCD Drivers 1

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