MAX1497 Datasheet, PDF (9/33 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers and μC Interface

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