Rainbow Electronics MAX1495 - Manual (Page 3)

MAX1491/MAX1493/MAX1495
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
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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 2.048 V
LOWBATT Leakage Current 10 pA
Hysteresis 20 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
TC VREF AV DD = 5V 40 ppm/ °C
Load Regulation
I SOURCE = 0µA to 300µA,
I SINK = 0µA to 30µA, T A = +25 °C (Note 6)
6 mV/µA
Line Regulation 50 µV/V
0.1Hz to 10Hz 25
Noise Voltage
10Hz to 10kHz 400
µVp-p
EXTERNAL REFERENCE (INTREF = GND, bypass REF+ and REF- to GND with 0.1µF or greater capacitors)
Differential (V REF+ - V REF- ) 2.048
REF Input Voltage
Absolute GND referenced -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 ±2% and 60Hz ±2%,
R
SOURCE < 10k Ω
150 dB
Common-Mode Rejection CMR At DC 100 dB
Input Leakage Current T A = +25 °C 10 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 V INL
0.3 x
DV DD
V
Input High Voltage V INH
0.7 x
DV DD
V
Input Hysteresis V HYS DV DD = 3.0V 200 mV