Electrical characteristics (continued) – Rainbow Electronics MAX1494 User Manual
Page 3
MAX1492/MAX1494
3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +2.7V to +5.25V, GND = 0, V
REF+
- V
REF-
= 2.048V (external reference). Internal clock mode, unless otherwise noted.
All specifications are at T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Internal clock mode, 50Hz and 60Hz ±2%
100
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
External clock mode, 50Hz and 60Hz ±2%,
f
CLK
= 4.915MHz
120
dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR
For 50Hz and 60Hz ±2%, R
SOURCE
< 10k
Ω
150
dB
Common-Mode Rejection
CMR
At DC
100
dB
Input Leakage Current
10
nA
Input Capacitance
10
pF
Dynamic Input Current
(Note 6)
-20
+20
nA
LOW-BATTERY VOLTAGE MONITOR (LOWBATT)
LOWBATT TripThreshold
2.048
V
LOWBATT Leakage Current
10
pA
Hysteresis
20
mV
INTERNAL REFERENCE (INTREF BIT = 1, REF- = GND, bypass REF+ to GND with a 4.7µF capacitor)
REF Output Voltage
V
REF
AV
DD
= 5V, T
A
= +25
°C
2.007
2.048
2.089
V
REF Output Short-Circuit Current
1
mA
REF Output Temperature
Coefficient
TC
VREF
AV
DD
= 5V
40
ppm/
°C
Load Regulation
I
SOURCE
= 0 to 300µA, I
SINK
= 0 to 30µA
6
mV/µA
Line Regulation
50
µV/V
0.1Hz to 10Hz
25
Noise Voltage
10Hz to 10kHz
400
µV
P-P
EXTERNAL REFERENCE (INTREF BIT = 0, bypass REF+ and REF- to GND with 0.1µF or larger capacitors)
REF Input Voltage
Differential (V
REF+
- V
REF-
)
2.048
V
Absolute REF Input Voltage to
GND
-2.2
+2.2
V
Internal clock mode, 50Hz and 60Hz ±2%
100
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
External clock mode, 50Hz and 60Hz ±2%,
f
CLK
= 4.915MHz
120
dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR
For 50Hz and 60Hz ±2%, R
SOURCE
< 10k
Ω
150
dB
Common-Mode Rejection
CMR
At DC
100
dB
Input Leakage Current
10
nA
Input Capacitance
10
pF
Dynamic Input Current
(Note 6)
-20
+20
nA