Rainbow-electronics MAX1495 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX1491/MAX1493/MAX1495

3.5- and 4.5-Digit, Single-Chip

ADCs with LCD Drivers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(AV

= DV

= +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

, bypass REF+ to GND with 4.7µF capacitors)

REF Output Voltage V

REF

= 5V, T

= +25°C 2.007 2.048 2.089 V

REF Output Short-Circuit Current T

= +25°C1mA

REF Output Temperature

Coefficient

VREF

= 5V 40 ppm/°C

Load Regulation

SOURCE

= 0µA to 300µA,

SINK

= 0µA to 30µA, T

= +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

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%,

SOURCE

< 10kΩ

150 dB

Common-Mode Rejection CMR At DC 100 dB

Input Leakage Current T

= +25°C10nA

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

= 0 or DV

-10 +10 µA

Input Low Voltage V

INL

0.3 x

Input High Voltage V

INH

0.7 x

Input Hysteresis V

HYS

= 3.0V 200 mV

1 2 3 4 5 6 7 8 ... 24 25

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