AD7782 datasheet(4/13 Pages) AD

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–3–

AD7782

Parameter

AD7782B

Unit

Test Conditions

LOGIC INPUTS (continued)

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

µA max

VIN = VDD

–70

µA max

VIN = GND, Typically –40

µA at 5 V and –20 µA 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

µA

VOL, Output Low Voltage

0.4

V max

VDD = 3 V, ISINK = 100

µA

VOH, Output High Voltage

4V min

VDD = 5 V, ISOURCE = 200

µA

VOL, Output Low Voltage

0.4

V max

VDD = 5 V, ISINK = 1.6 mA

Floating-State Leakage Current

±10

µA 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/max

VDD = 3 V nom

4.75/5.25

V min/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)

µA max

VDD = 3 V, 6

µA typ

µA max

VDD = 5 V, 20

µA 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

± 1 Hz and equals 66 dB at 60 ± 1 Hz.

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

Specifications subject to change without notice.

REV. A

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