AD7732BRU datasheet(4/32 Pages) AD

Numer części	AD7732BRU

Szczegółowy opis	2-Channel, -10 V Input Range, High Throughput, 24-Bit SIGMA- ADC

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Producent	AD [Analog Devices]

Strona internetowa	http://www.analog.com

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4 / 32 page

AD7732

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

BIAS Pin Impedance1, 9

12.5

15.5

k

Ω

RA, RB, RC, RD Pin Impedance1, 9

25

31

k

Ω

Input Resistor Matching

0.2

%

Input Resistor Temp. Coefficient

–30

ppm/°C

REFERENCE INPUTS

REFIN(+) to REFIN(–) Voltage1, 10

2.475

2.5

2.525

V

NOREF Trigger Voltage

0.5

V

NOREF Bit in Channel Status Register

REFIN(+), REFIN(–)

Common-Mode Voltage1

0

AVDD

V

Reference Input DC Current11

400

µA

SYSTEM CALIBRATION1, 12

Full-Scale Calibration Limit

+1.05

× FS

V

Zero-Scale Calibration Limit

–1.05

× FS

V

Input Span

0.8

× FS

2.1

× FS

V

LOGIC INPUTS

Input Current

±1

µA

Input Current CS

±10

µA

CS = DVDD

–40

µA

CS = DGND, Internal Pull-Up Resistor

Input Capacitance

5

pF

VT+1

1.4

2

V

DVDD = 5 V

VT–1

0.8

1.4

V

DVDD = 5 V

VT+ – VT–1

0.3

0.85

V

DVDD = 5 V

VT+1

0.95

2

V

DVDD = 3 V

VT– 1

0.4

1.1

V

DVDD = 3 V

VT+ – VT–1

0.3

0.85

V

DVDD = 3 V

MCLK IN ONLY

Input Current

±10

µA

Input Capacitance

5

pF

VINL Input Low Voltage

0.8

V

DVDD = 5 V

VINH Input High Voltage

3.5

V

DVDD = 5 V

VINL Input Low Voltage

0.4

V

DVDD = 3 V

VINH Input High Voltage

2.5

V

DVDD = 3 V

LOGIC OUTPUTS13

VOL Output Low Voltage

0.4

V

ISINK = 800 µA, DVDD = 5 V

VOH Output High Voltage

4.0

V

ISOURCE = 200 µA, DVDD = 5 V

VOL Output Low Voltage

0.4

V

ISINK = 100 µA, DVDD = 3 V

VOH Output High Voltage

DVDD – 0.6

V

ISOURCE = 100 µA, DVDD = 3 V

Floating State Leakage Current

±1

µA

Floating State Leakage Capacitance

3

pF

P0, P1 INPUTS/OUTPUTS

Levels Referenced to Analog Supplies

Input Current

±10

µA

VINL Input Low Voltage

0.8

V

AVDD = 5 V

VINH Input High Voltage

3.5

V

AVDD = 5 V

VOL Output Low Voltage

0.4

V

ISINK = 7 mA, See Abs. Max. Ratings

VOH Output High Voltage

4.0

V

ISOURCE = 200 µA, AVDD = 5 V

POWER REQUIREMENTS

AVDD–AGND Voltage

4.75

5.25

V

DVDD–DGND Voltage

4.75

5.25

V

2.70

3.60

V

AVDD Current (Normal Mode)

13.5

15.9

mA

AVDD = 5 V

DVDD Current (Normal Mode)14

2.8

3.1

mA

DVDD = 5 V

Rev. 0 | Page 4 of 32

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