MAX1146 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1146

Multichannel, True-Differential, Serial, 14-Bit ADCs

Maxim Integrated 

Multichannel, True-Differential,

Serial, 14-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 5V (MAX1146/MAX1148), VDD = 3.3V (MAX1147/MAX1149), SHDN = VDD, VCOM = 0, fSCLK = 2.1MHz, external clock (50%

duty cycle), 18 clocks/conversion (116ksps), VREFADJ = VDD, CREF = 2.2µF, external +4.096V reference at REF (MAX1146/

MAX1148), external 2.500V reference at REF (MAX1147/MAX1149), TA = TMIN to TMAX, unless otherwise noted. Typical values are at

TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

Throughput Rate

fSAMPLE

Internal clock mode, 18 clocks/conversion

fSCLK = 2.1MHz

24 clocks/conversion

External clock mode, 18 clocks/conversion

fSCLK = 2.1MHz

24 clocks/conversion

T/H Acquisition Time

Aperture Delay

Aperture Jitter

Serial Clock Frequency

tACQ

tAD

tAJ

fSCLK

External clock mode

Internal clock mode

Internal Clock Frequency

ANALOG INPUTS (CH0–CH7, COM)

Input Voltage Range, Single-

Ended and Differential (Note 6)

Multiplexer Leakage Current

Input Capacitance

Unipolar, COM = 0

Bipolar, COM = VREF / 2, single-ended

On/off-leakage current, VCH_ = 0 to VDD

INTERNAL REFERENCE (CREF = 2.2µF, CREFADJ = 0.01µF)

REF Output Voltage

VREF

MAX1147/MAX1149, TA = +25°C

MAX1146/MAX1148, TA = +25°C

REF Short-Circuit Current

IREFSC REF = DGND

VREF Tempco (Note 7)

MAX114_ BC _ _

MAX114_ BE _ _

Load Regulation

Capacitive Bypass at REF

0 to 0.2mA output load (Note 8)

Capacitive Bypass at REFADJ

REFADJ Output Voltage

REFADJ Input Range

REFADJ Logic High

Pull REFADJ high to disable the internal

bandgap reference and reference buffer

Reference Buffer Voltage Gain

MAX1147/MAX1149

MAX1146/MAX1148

MIN

1.4

0.1

0

0

2.480

4.076

2

0.01

VDD -

0.25V

TYP MAX UNITS

60.3

51.5

116.66

87.50

ksps

µs

20

ns

<50

ps

2.1

MHz

2.1

2.1

MHz

VREF

V

±VREF / 2

±0.01 ±1

µA

18

pF

2.500

4.096

±30

±40

2.0

1.250

±18

2.520

4.116

20

±50

±60

V

mA

ppm/°C

mV

µF

µF

V

mV

V

2.000

V/V

3.277

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