MAX1366ECM Maxim Integrated, MAX1366ECM Datasheet - Page 21

• Manufacturer Part Number: MAX1366ECM
• Description: LED Display Drivers
• Manufacturer: Maxim Integrated

The MAX1366/MAX1368 include a leading-zero sup-
pression circuitry to turn off unnecessary zeros. For
example, when DPSET1 and DPSET2 = [0,0], 0.0 is dis-
played instead of 000.0 (MAX1366). This feature saves
a substantial amount of power by not lighting unneces-
sary LEDs.
Figure 20. DAC Output Voltage vs. ADC Output Code
Figure 21. Output Current (4-20OUT) vs. ADC Output Code
(Current Offset Enabled)
Microcontroller-Interface, 4.5-/3.5-Digit Panel
1.25
20
12
0
FS = FULL SCALE
4
0
FS = FULL SCALE
- FS
- FS
CURRENT
(EN_I = 1)
ENABLED
OFFSET
______________________________________________________________________________________
ADC OUTPUT CODE
ADC OUTPUT CODE
Leading-Zero Suppression
0
0
UNIPOLAR:
BIPLOLAR:
UNIPOLAR:
BIPLOLAR:
+ FS
+ FS
Meters with 4–20mA Output
The MAX1366/MAX1368 also include interdigit-blanking
circuitry. Without this feature, it is possible to see a faint
digit next to a digit that is completely on. The
interdigit-blanking circuitry prevents ghosting over into
the next digit for a short period of time. The typical
interdigit blanking time is 4µs.
Figure 22. Output Current (4-20OUT) vs. ADC Output Code
(Current Offset Disabled)
Figure 23. 4-20OUT Output Current vs. V/I Converter Input
Voltage
16
8
0
FS = FULL SCALE
20
16
4
0
0
- FS
DISABLED
CURRENT
(EN_I = 0)
OFFSET
ADC OUTPUT CODE
V/I CONVERTER INPUT ( V )
OFFSET ENABLED:
OFFSET DISABLED:
0
Interdigit Blanking
UNIPOLAR:
BIPLOLAR:
1. 25
+ FS
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