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| MAX1492 Datasheet, PDF (4/35 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers | |||
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3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = +2.7V to +5.25V, GND = 0, VREF+ - VREF- = 2.048V (external reference). Internal clock mode, unless otherwise noted.
All specifications are at TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CHARGE PUMP (CNEG = 0.1µF)
Output Voltage
VNEG
DIGITAL INPUTS (SCLK, DIN, CS, CLK)
Input Current
IIN
CONDITIONS
VIN = 0 or DVDD
Input Low Voltage
VINL
Input High Voltage
Input Hysteresis
DIGITAL OUTPUTS (DOUT, EOC)
Output Low Voltage
Output High Voltage
Tri-State Leakage Current
Tri-State Output Capacitance
POWER SUPPLY
AVDD Voltage
DVDD Voltage
Power-Supply Rejection AVDD
Power-Supply Rejection DVDD
VINH
VHYST
VOL
VOH
IL
COUT
AVDD
DVDD
PSRRA
PSRRD
AVDD Current (Notes 8, 9)
IAVDD
DVDD Current (Notes 8, 9)
LCD DRIVER
IDVDD
DVDD = 3.0V
ISINK = 1mA
ISOURCE = 200µA
DOUT only
DOUT only
(Note 7)
(Note 7)
AVDD = 5V
Standby
DVDD = 5V
DVDD = 3.3V
Standby
MIN TYP MAX UNITS
-2.60 -2.42 -2.30
V
-10
+10
µA
0.3 x
DVDD
V
0.7 x DVDD
V
200
mV
0.4
V
0.8 x DVDD
V
-10
+10
µA
15
pF
2.70
5.25
V
2.70
5.25
V
80
dB
100
dB
580
660
µA
240
380
260
320
130
180
µA
10
20
RMS Segment On Voltage
RMS Segment Off Voltage
Display Voltage Setup Resistor
Display Multiplex Rate
LCD Data-Update Rate
MAX1492
MAX1494
MAX1492
RDISP
MAX1494
MAX1494 only
1.92 x
DVDD
V
1.92 x
(DVDD - VDISP)
1/3 x
DVDD
V
1/3 x
(DVDD - VDISP)
157.5
kâ¦
107
Hz
2.5
Hz
4 _______________________________________________________________________________________
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