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MAX1492 Datasheet, PDF (17/35 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
φ1
φ2
φ3
φ1'
φ2'
φ3'
ALL
OFF
a ON
g, d OFF
VLCD
0 VRMS = VLCD / 3 OFF
-VP
VP
0 VRMS = VLCD / 3 OFF
a, g ON
d OFF
-VP
VP
0 VRMS = 1.92VLCD / 3 ON
-VP
VP
ALL
ON
0 VRMS = 1.92VLCD / 3 ON
-VP
VG = VY - VBP2 (DIFFERENCE BETWEEN SEGMENT LINE Y AND BP2 VOLTAGE)
VOLTAGE CONTRAST RATIO = VRMS ON / VRMSOFF = 1.922V
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'
Figure 11. Voltage Waveforms on the g Segment
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