AD7783 datasheet(3/12 Pages) AD

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REV. B

AD7783

–3–

Parameter

AD7783B

Unit

Test Conditions

LOGIC INPUTS

All Inputs Except SCLK and XTAL1

VINL, Input Low Voltage

0.8

V max

VDD = 5 V

0.4

V max

VDD = 3 V

VINH, Input High Voltage

2.0

V min

VDD = 3 V or 5 V

SCLK Only (Schmitt-Triggered Input)

VT(+)

1.4/2

V min/V max

VDD = 5 V

VT(–)

0.8/1.4

V min/V max

VDD = 5 V

VT(+) – VT(–)

0.3/0.85

V min/V max

VDD = 5 V

VT(+)

0.95/2

V min/V max

VDD = 3 V

VT(–)

0.4/1.1

V min/V max

VDD = 3 V

VT(+) – VT(–)

0.3/0.85

V min/V max

VDD = 3 V

XTAL1 Only

VINL, Input Low Voltage

0.8

V max

VDD = 5 V

VINH, Input High Voltage

3.5

V min

VDD = 5 V

VINL, Input Low Voltage

0.4

V max

VDD = 3 V

VINH, Input High Voltage

2.5

V min

VDD = 3 V

Input Currents

±1

mA max

VIN = VDD

–70

mA max

VIN = GND, Typically –40

mA at 5 V and

–20

mA at 3 V

Input Capacitance

pF typ

All Digital Inputs

LOGIC OUTPUTS (Excluding XTAL2)

VOH, Output High Voltage

VDD – 0.6

V min

VDD = 3 V, ISOURCE = 100

VOL, Output Low Voltage

0.4

V max

VDD = 3 V, ISINK = 100

VOH, Output High Voltage

4V min

VDD = 5 V, ISOURCE = 200

VOL, Output Low Voltage

0.4

V max

VDD = 5 V, ISINK = 1.6 mA

Floating-State Leakage Current

±10

mA max

Floating-State Output Capacitance

±10

pF typ

Data Output Coding

Offset Binary

START-UP TIME

From Power-On

300

ms typ

POWER REQUIREMENTS

Power Supply Voltage

VDD – GND

2.7/3.6

V min/V max

VDD = 3 V nom

4.75/5.25

V min/V max

VDD = 5 V nom

Power Supply Currents

IDD Current (Normal Mode)

1.5

mA max

VDD = 3 V, 1.3 mA typ

1.7

mA max

VDD = 5 V, 1.5 mA typ

IDD (Power-Down Mode, CS = 1)

mA max

VDD = 3 V, 6

mA typ

mA max

VDD = 5 V, 20

mA typ

NOTES

1Temperature range –40

∞C to +85∞C.

2Guaranteed by design and/or characterization data on production release.

3When a 28.8 kHz crystal is used, normal-mode rejection is improved so that the rejection equals 75 dB at 50 Hz

±1 Hz and equals 66 dB at 60 Hz ±1 Hz.

4Normal mode refers to the case where the ADC is running.

Specifications subject to change without notice.

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