MAX1497 Maxim, MAX1497 Datasheet - Page 9

• Manufacturer Part Number: MAX1497
• Description: 3.5- and 4.5-Digit / Single-Chip ADCs with LED Drivers and C Interface
• Manufacturer: Maxim

(AV
REF- = GND, C
5.020
5.015
5.010
5.005
5.000
4.995
4.990
4.985
4.980
DD
= DV
2.70
3.5- and 4.5-Digit, Single-Chip ADCs with LED
DD
3.21
REF+
= V
vs. SUPPLY VOLTAGE
DATA OUTPUT RATE
SUPPLY VOLTAGE (V)
DD
3.72
= C
_______________________________________________________________________________________
= +2.7V to +5.25V, V
REF-
-2.40
-2.42
-2.44
-2.46
-2.48
-2.50
4.23
2.75
= 0.1µF, RANGE bit = 1, internal clock mode, C
CHARGE-PUMP OUTPUT VOLTAGE
4.74
vs. ANALOG SUPPLY VOLTAGE
3.25
SUPPLY VOLTAGE (V)
5.25
3.75
LED
-0.05
-0.10
-0.15
-0.20
0.20
0.15
0.10
0.05
Typical Operating Characteristics (continued)
= +2.7V to +5.25V, GND = 0, GLED = 0, external reference mode, REF+ = 2.048V,
4.25
0
-2.0
-1.5 -1.0 -0.5
4.75
vs. COMMON-MODE VOLTAGE
COMMON-MODE VOLTAGE (V)
5.25
OFFSET ERROR
Drivers and µC Interface
0
30
25
20
15
10
0.5
5
0
2.70
R
1.0
VNEG
ISET
= 25kΩ
1.5
3.21
= 0.1µF. T
vs. SUPPLY VOLTAGE
SEGMENT CURRENT
2.0
SUPPLY VOLTAGE (V)
3.72
2V/div
1V/div
A
4.23
= +25°C, unless otherwise noted.)
V
DD
4.74
V
V
NEG
NEG
STARTUP SCOPE SHOT
5.25
20ms/div
9