Rainbow Electronics MAX1494 - Manual (Page 32)

MAX1494
(MAX1492)
0.1 µF 4.7 µF
0.1 µF
0.1 µF
0.1 µF
0.1 µF
4.7 µF
10 µF
L ISO
R
HI
R LOW
2.7V TO
5.25V
AIN+
AIN-
DV
DD
AV
DD
LOWBATT V
NEG
GND REF- REF+
V DISP
(MAX1494 ONLY)
CLK
SCLK
DIN
DOUT
CS
EOC
BACKPLANE
CONNECTIONS
SEG1–SEG13
(SEG–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