MX7705_10 datasheet(3/33 Pages) MAXIM

Part #	MX7705

Description	16-Bit, Low-Power, 2-Channel, Sigma-Delta ADC

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Manufacturer	MAXIM [Maxim Integrated Products]

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16-Bit, Low-Power, 2-Channel,

Sigma-Delta ADC

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3V or 5V, GND = 0, VREF+ = 1.225V for VDD = 3V and VREF+ = 2.5V for VDD = 5V, VREF- = GND, external fCLKIN =

2.4576MHz, CLKDIV bit = 0, CREF+ to GND = 0.1µF, CREF- to GND = 0.1µF, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Gain = 1

34

Gain = 2

38

Gain = 4

45

AIN Input Capacitance

Gain = 8 to 128

60

pF

AIN Input Sampling Rate

fs

Gain = 1 to 128

fCLKIN /

64

MHz

Gain = 1

96

Gain = 2

105

Gain = 4

110

VDD = 5V

Gain = 8 to 128

130

Gain = 1

105

Gain = 2

110

Gain = 4

120

Input Common-Mode Rejection

CMR

VDD = 3V

Gain = 8 to 128

130

dB

Normal-Mode 50Hz Rejection

For filter notches of 25Hz, 50Hz,

±0.02

× fNOTCH

98

dB

Normal-Mode 60Hz Rejection

For filter notches of 20Hz, 60Hz,

±0.02

× fNOTCH

98

dB

Common-Mode 50Hz Rejection

For filter notches of 25Hz, 50Hz,

±0.02

× fNOTCH

150

dB

Common-Mode 60Hz Rejection

For filter notches of 20Hz, 60Hz,

±0.02

× fNOTCH

150

dB

EXTERNAL REFERENCE (REF+, REF-)

VDD = 4.75V to 5.25V

1.0

3.5

REF Differential Input Voltage

Range (Note 9)

VREF

VDD = 2.7V to 3.6V

1.00

1.75

V

REF Absolute Input Voltage Range

GND

VDD

V

REF Input Capacitance

Gain = 1 to 128

10

pF

REF Input Sampling Rate

fs

fCLKIN /

64

MHz

DIGITAL INPUTS (DIN, SCLK,

CS, RESET)

Input High Voltage

VIH

2V

VDD = 4.75V to 5.25V

0.8

Input Low Voltage

VIL

VDD = 2.7V to 3.6V

0.4

V

DIN,

CS, RESET

250

Input Hysteresis

VHYST

SCLK

500

mV

Input Current

IIN

±1

µA

Input Capacitance

5pF

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