MAX1491 Datasheet, PDF (3/25 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers

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
LOW-BATTERY VOLTAGE MONITOR (LOWBATT)
LOWBATT Trip Threshold
2.048
LOWBATT Leakage Current
10
Hysteresis
20
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
REF Output Short-Circuit Current
T_A = +25°C
1
REF Output Temperature
Coefficient
TC_VREF AV_DD = 5V
40
MAX UNITS
V
pA
mV
2.089
V
mA
ppm/°C
Load Regulation
I_SOURCE = 0µA to 300µA,
I_SINK = 0µA to 30µA, T_A = +25°C (Note 6)
6
Line Regulation
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-)
Absolute GND referenced
2.048
-2.2
+2.2
mV/µA
µV/V
µVp-p
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 < 10kΩ
Common-Mode Rejection
CMR At DC
Input Leakage Current
T_A = +25°C
Input Capacitance
Dynamic Input Current
(Note 5)
CHARGE PUMP
Output Voltage
V_NEG
DIGITAL INPUTS (INTREF, RANGE, PEAK, HOLD, DPSET1, DPSET2, DPON)
Input Current
I_IN
V_IN = 0 or DV_DD
Input Low Voltage
V_INL
Input High Voltage
Input Hysteresis
V_INH
V_HYS
DV_DD = 3.0V
150
dB
100
dB
10
nA
10
pF
-20
+20
nA
-2.6
-2.42
-2.3
V
-10
+10
µA
0.3 x
V
DV_DD
0.7 x
V
DV_DD
200
mV
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