EVAL-AD7795EB datasheet(6/36 Pages) AD

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AD7794/AD7795

Rev. D | Page 6 of 36

Parameter1

AD7794/AD7795

Unit

Test Conditions/Comments

BIAS VOLTAGE GENERATOR

VBIAS

AVDD/2

V nom

VBIAS Generator Start-Up Time

ms/nF typ

Dependent on the capacitance connected to AIN;

See Figure 11

TEMPERATURE SENSOR

Accuracy

±2

°C typ

Applies if user calibrates the temperature sensor

Sensitivity

0.81

mV/°C typ

LOW-SIDE POWER SWITCH

RON

Ω max

AVDD = 5 V

Ω max

AVDD = 3 V

Allowable Current2

mA max

Continuous current

DIGITAL OUTPUTS (P1 and P2)

VOH, Output High Voltage2

AVDD − 0.6

V min

AVDD = 3 V, ISOURCE = 100 μA

VOL, Output Low Voltage2

0.4

V max

AVDD = 3 V, ISINK = 100 μA

VOH, Output High Voltage2

V min

AVDD = 5 V, ISOURCE = 200 μA

VOL, Output Low Voltage2

0.4

V max

AVDD = 5 V, ISINK = 800 μA

INTERNAL/EXTERNAL CLOCK

Internal Clock

Frequency2

64 ± 3%

kHz

min/max

Duty Cycle

50:50

% typ

External Clock

Frequency

kHz nom

A 128 kHz external clock can be used if the divide-by-2

function is used (Bit CLK1 = CLK0 = 1)

Duty Cycle

45:55 to 55:45

% typ

Applies for external 64 kHz clock, a 128 kHz clock can

have a less stringent duty cycle

LOGIC INPUTS

CS2

VINL, Input Low Voltage

0.8

V max

DVDD = 5 V

0.4

V max

DVDD = 3 V

VINH, Input High Voltage

2.0

V min

DVDD = 3 V or 5 V

SCLK (Schmitt-Triggered Input),

CLK, and DIN2

AD7794B/AD7795B

VT(+)

1.4/2

V min/max

DVDD = 5 V

VT(−)

0.8/1.7

V min/max

DVDD = 5 V

VT(+) to VT(−)

0.1/0.17

V min/max

DVDD = 5 V

VT(+)

0.9/2

V min/max

DVDD = 3 V

VT(−)

0.4/1.35

V min/max

DVDD = 3 V

VT(+) to VT(−)

0.06/0.13

V min/max

DVDD = 3 V

AD7794C

VT(+)

1.35/2.05

V min/max

DVDD = 5 V

VT(−)

0.8/1.9

V min/max

DVDD = 5 V

VT(+) to VT(−)

0.1/0.19

V min/max

DVDD = 5 V

VT(+)

0.9/2

V min/max

DVDD = 3 V

VT(−)

0.4/1.35

V min/max

DVDD = 3 V

VT(+) to VT(−)

0.06/0.15

V min/max

DVDD = 3 V

Input Currents

±10

μA max

VIN = DVDD or GND

Input Capacitance

pF typ

All digital inputs

EVAL-AD7795EB 数据表(PDF) 6 Page - Analog Devices

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EVAL-AD7795EB 数据表(PDF) 6 Page - Analog Devices

EVAL-AD7795EB 数据表(HTML) 6 Page - Analog Devices

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