MAX1492 Maxim, MAX1492 Datasheet - Page 9

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

Figure 1. MAX1494 Functional Diagram
MAX1492
24
25
26
27
28
—
—
—
—
PIN
REF+
AIN+
REF-
AIN-
MAX1494
21
25
26
27
29
22
23
24
28
_______________________________________________________________________________________
AV
DD
BUFFERS
+2.5V
INPUT
-2.5V
MAX1494
SEG10
SEG11
SEG12
SEG13
NAME
V
DV
V
BP3
BP2
BP1
3.5- and 4.5-Digit, Single-Chip ADCs
DISP
NEG
DD
LCD Segment 10 Driver
LCD Backplane 3 Driver
LCD Backplane 2 Driver
LCD Backplane 1 Driver
-2.42V Charge-Pump Output. Bypass V
LCD Segment 11 Driver
LCD Segment 12 Driver
LCD Segment 13 Driver
Temperature-Compensation Voltage Input for LCD. If not using temperature
compensation, connect V
REFERENCE
BANDGAP
2.048V
GND
SERIAL I/O AND CONTROL
SCLK
A = 1.22
ADC
DIN
OSCILLATOR/
+2.5V
DISP
CLOCK
DOUT
CHARGE
to GND. See the V
PUMP
V
BINARY-TO-BCD
NEG
CONVERTERS
LCD DRIVERS
AND
CS
-2.5V
FUNCTION
Pin Description (continued)
NEG
LOWBATT
with LCD Drivers
to GND with a 0.1µF capacitor.
DISP
LCD Compensation section.
CONTROL
TO
EOC
SEG1
SEG13
BP1
BP2
BP3
V
CLK
DISP
9