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| MAX1497 Datasheet, PDF (4/33 Pages) Maxim Integrated Products – 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers and μC Interface | |||
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3.5- and 4.5-Digit, Single-Chip ADCs with LED
Drivers and µC Interface
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = VDD = +2.7V to +5.25V, GND = 0, GLED = 0, VLED = +2.7V to +5.25V, VREF+ - VREF- = 2.048V (external reference)
CREF+ = CREF- = 0.1µF, CVNEG = 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA = TMIN to TMAX.
Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Capacitance
10
pF
Average Dynamic Input Current
CHARGE PUMP
(Note 6)
-20
+20
nA
Output Voltage
VNEG
DIGITAL INPUTS (SCLK, DIN, CS, CLK)
CVNEG = 0.1µF
-2.60 -2.42 -2.30
V
Input Current
IIN
VIN = 0 or DVDD = VDD
-10
+10
µA
Input Low Voltage
VINL
MAX1499
MAX1497
0.3 x
DVDD
V
0.3 x
VDD
Input High Voltage
VINH
MAX1499
MAX1497
0.7 x
DVDD
V
0.7 x
VDD
Input Hysteresis
DIGITAL OUTPUTS (DOUT, EOC)
Output Low Voltage
VHYS
VOL
DVDD = VDD = 3.0V
ISINK = 1mA
200
mV
0.4
V
ISOURCE = 200µA, MAX1499
0.8 x
DVDD
Output High Voltage
VOH
V
ISOURCE = 200µA, MAX1497
0.8 x
VDD
Tri-State Leakage Current
Tri-State Output Capacitance
POWER SUPPLY (Note 10)
IL
COUT
DOUT only
DOUT only
-1
+1
µA
15
pF
VDD Voltage
AVDD Voltage
DVDD Voltage
Power-Supply Rejection VDD
Power-Supply Rejection AVDD
Power-Supply Rejection DVDD
VDD Current (Notes 8, 9)
AVDD Current (Notes 8, 9)
VDD
AVDD
DVDD
PSRR
PSRRA
PSRRD
IVDD
IAVDD
MAX1497
MAX1499
MAX1499
(Note 7)
(Note 7)
(Note 7)
VDD = 5.25V
VDD = 3.3V
Standby mode
AVDD = 5.25V
AVDD = 3.3V
Standby mode
2.70
5.25
V
2.70
5.25
V
2.70
5.25
V
80
dB
80
dB
100
dB
664 744
618 663
µA
268 325
640
600
µA
305
4 _______________________________________________________________________________________
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