MAX1492 Maxim, MAX1492 Datasheet - Page 17

• Manufacturer Part Number: MAX1492
• Description: 3.5- and 4.5-Digit / Single-Chip ADCs with LCD Drivers
• Manufacturer: Maxim

Figure 11. Voltage Waveforms on the g Segment
______________________________________________________________________________________
g, d OFF
a, g ON
d OFF
a ON
ALL
ALL
OFF
ON
3.5- and 4.5-Digit, Single-Chip ADCs
V
VOLTAGE CONTRAST RATIO = V
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'
G
φ1
= V
Y
- V
BP2
φ2
(DIFFERENCE BETWEEN SEGMENT LINE Y AND BP2 VOLTAGE)
φ3
RMS
ON / V
φ1'
RMSOFF
φ2'
= 1.922V
φ3'
with LCD Drivers
0
0
0
0
V
-V
V
-V
V
-V
V
-V
LCD
P
P
P
P
P
P
P
V
V
V
V
RMS
RMS
RMS
RMS
= V
= V
= 1.92V
= 1.92V
LCD
LCD
/ 3 OFF
/ 3 OFF
LCD
LCD
/ 3 ON
/ 3 ON
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