MAX1447 Datasheet, PDF (3/24 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers

3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
ELECTRICAL CHARACTERISTICS (continued)
(AV_DD = DV_DD = V_DD = +2.7V to +5.25V, GND = 0, V_LED = +2.7V to +5.25V, GLED = 0, V_REF+ - V_REF- = 2.048V (external reference),
C_REF+ = C_REF- = 0.1µF, C_VNEG = 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at T_A = T_MIN to T_MAX.
Typical values are at T_A = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
ANALOG INPUTS (AIN+, AIN-) (bypass to GND with 0.1µF or greater capacitors)
RANGE = GND
AIN Input Voltage Range (Note 5)
RANGE = DV_DD (MAX1447/MAX1498) or
V_DD (MAX1496)
MIN TYP MAX UNITS
-2.0
+2.0
V
-0.2
+0.2
AIN Absolute Input Voltage
Range to GND
-2.2
+2.2
V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100
dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR For 50Hz and 60Hz ±2%, R_SOURCE < 10kΩ
150
dB
Common-Mode Rejection
Input Leakage Current
Input Capacitance
Average Dynamic Input Current
CMR At DC
(Note 6)
100
dB
10
nA
10
pF
-20
+20
nA
INTERNAL REFERENCE (REF- = GND, INTREF = DV_DD (MAX1447/MAX1498) or V_DD (MAX1496) (bypass REF+ to GND with a
4.7µF capacitor)
REF Output Voltage
REF Output Short-Circuit Current
V_REF
2.007 2.048 2.089
V
1
mA
REF Output Temperature
Coefficient
TC_VREF
40
ppm/°C
Load Regulation
Line Regulation
I_SOURCE = 0 to 300µA, I_SINK = 0 to 30µA
6
50
0.1Hz to 10Hz
25
Noise Voltage
10Hz to 10kHz
400
EXTERNAL REFERENCE (INTREF = GND) (bypass REF+ and REF- to GND with 0.1µF or greater capacitors)
REF Input Voltage
Differential, V_REF+ - V_REF-
2.048
Absolute REF+, REF- Input
Voltage to GND
-2.2
+2.2
mV/µA
µV/V
µV_P-P
V
V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100
dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR For 50Hz and 60Hz ±2%, R_SOURCE < 10kΩ
150
dB
Common-Mode Rejection
Input Leakage Current
Input Capacitance
Average Dynamic Input Current
CMR At DC
(Note 6)
100
dB
10
nA
10
pF
-20
+20
nA
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