Datasheet

MAX1246/MAX1247

+2.7V, Low-Power, 4-Channel,

Serial 12-Bit ADCs in QSOP-16

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +2.7V to +3.6V (MAX1246); V

= +2.7V to +5.25V (MAX1247); COM = 0V; f

SCLK

= 2.0MHz; external clock (50% duty cycle);

15 clocks/conversion cycle (133ksps); MAX1246—4.7µF capacitor at VREF pin; MAX1247—external reference, VREF = 2.5V applied

to VREF pin; T

= T

MIN

to T

MAX

; unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

EXTERNAL REFERENCE AT REFADJ

Internal compensation mode 0

Capacitive Bypass at VREF

External compensation mode 4.7

µF

MAX1246

2.06

Reference Buffer Gain

MAX1247

2.00

V/V

MAX1246

±50

REFADJ Input Current

MAX1247

±10

µA