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3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
ELECTRICAL CHARACTERISTICS (continued)
(AV DD = DV DD = +2.7V to +5.25V, GND = 0, V REF+ - V REF- = 2.048V (external reference), C NEG = 0.1μF. All specifications are T MIN
to T MAX , unless otherwise noted. Typical values are at +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOW-BATTERY VOLTAGE MONITOR (LOWBATT)
LOWBATT Trip Threshold
LOWBATT Leakage Current
Hysteresis
2.048
10
20
V
pA
mV
INTERNAL REFERENCE (REF- = GND, INTREF = DV DD , bypass REF+ to GND with 4.7μF capacitors)
REF Output Voltage
V REF
AV DD = 5V, T A = +25 ° C
2.007
2.048
2.089
V
REF Output Short-Circuit Current
T A = +25 ° C
1
mA
REF Output Temperature
Coefficient
Load Regulation
Line Regulation
Noise Voltage
TC VREF
AV DD = 5V
I SOURCE = 0μA to 300μA,
I SINK = 0μA to 30μA, T A = +25 ° C (Note 6)
0.1Hz to 10Hz
10Hz to 10kHz
40
6
50
25
400
ppm/ ° C
mV/μA
μV/V
μVp-p
EXTERNAL REFERENCE (INTRE F = GND, bypass REF+ and REF- to GND with 0.1μF or greater capacitors)
REF Input Voltage
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
Common-Mode Rejection
Input Leakage Current
CMR
CMR
Differential (V REF+ - V REF- )
Absolute GND referenced
50Hz and 60Hz ±2%
For 50Hz ±2% and 60Hz ±2%,
R SOURCE < 10k ?
At DC
T A = +25 ° C
-2.2
2.048
100
150
100
10
+2.2
V
dB
dB
dB
nA
Input Capacitance
10
pF
Dynamic Input Current
(Note 5)
-20
+20
nA
CHARGE PUMP
Output Voltage
V NEG
-2.6
-2.42
-2.3
V
DIGITAL INPUTS (INTREF, RANGE, PEAK, HOLD, DPSET1, DPSET2, DPON)
Input Current
I IN
V IN = 0 or DV DD
-10
+10
μA
Input Low Voltage
Input High Voltage
V INL
V INH
0.7 x
DV DD
0.3 x
DV DD
V
V
Input Hysteresis
V HYS
DV DD = 3.0V
200
mV
_______________________________________________________________________________________
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