MAX1246BEPE(1997) 查看數據表（PDF） - Maxim Integrated

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MAX1246BEPE
(Rev.:1997)

+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16

Maxim Integrated 

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

Serial 12-Bit ADCs in QSOP-16

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +2.7V to +3.6V (MAX1246); VDD = +2.7V to +5.25V (MAX1247); COM = 0V; fSCLK = 2.0MHz; external clock (50% duty cycle);

15 clocks/conversion cycle (133ksps); MAX1246—4.7µF capacitor at VREF pin; MAX1247—external reference, VREF = 2.500 V

applied to VREF pin; TA = TMIN to TMAX; unless otherwise noted.)

PARAMETER

ANALOG/COM INPUTS

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Input Voltage Range, Single-

Ended and Differential (Note 6)

Unipolar, COM = 0V

Bipolar, COM = VREF / 2

0 to VREF

V

±VREF / 2

Multiplexer Leakage Current

Input Capacitance

On/off leakage current, VCH_ = 0V or VDD

INTERNAL REFERENCE (MAX1246 only, reference buffer enabled)

VREF Output Voltage

TA = +25°C

VREF Short-Circuit Current

MAX1246_C

VREF Temperature Coefficient

MAX1246_E

MAX1246_M

Load Regulation (Note 8)

0mA to 0.2mA output load

Capacitive Bypass at VREF

Internal compensation mode

External compensation mode

Capacitive Bypass at REFADJ

REFADJ Adjustment Range

EXTERNAL REFERENCE AT VREF (Buffer disabled)

±0.01 ±1

µA

16

pF

2.480

0

4.7

0.047

2.500

±30

±30

±30

±0.35

±1.5

2.520

30

±50

±60

±80

V

mA

ppm/°C

mV

µF

µF

%

VREF Input Voltage Range

(Note 9)

1.0

VDD +

50mV

V

VREF Input Current

VREF Input Resistance

Shutdown VREF Input Current

VREF = 2.500V

100

150

µA

18

25

kΩ

0.01

10

µA

REFADJ Buffer Disable Threshold

VDD -

0.5

V

EXTERNAL REFERENCE AT REFADJ

Capacitive Bypass at VREF

Reference Buffer Gain

REFADJ Input Current

Internal compensation mode

External compensation mode

MAX1246

MAX1247

MAX1246

MAX1247

0

µF

4.7

2.06

V/V

2.00

±50

µA

±10

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