Datasheet

MAX1494
(MAX1492)
0.1µF 4.7µF
0.1µF
0.1µF
0.1µF
0.1µF
4.7µF
10µF
L
ISO
R
HI
R
LOW
2.7V TO
5.25V
AIN+
AIN-
DVDD
AVDD
LOWBATT V
NEG
GND REF- REF+
V
DISP
(MAX1494 ONLY)
CLK
SCLK
DIN
DOUT
CS
EOC
BACKPLANE
CONNECTIONS
SEG1–SEG13
(SEG1–SEG10)
HOLD PEAK LOW BATTERY
V
IN
Typical Operating Circuit
MAX1492/MAX1494
3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
32 ______________________________________________________________________________________
>7CFh
7CFh
002h
001h
000h
FFFh
FFEh
FFDh
830h
<830h
-2V
0
ANALOG INPUT VOLTAGE
+2V
ADC RESULT
LCD
1 - - -
1999
2
1
0
-0
-1
-2
-1999
-1 - - -
-1mV
1mV
Figure 27. MAX1492 Transfer Function ±2V Range