AD7709 datasheet(4/32 Pages) AD

4 / 32 page

REV. A

–4–

AD7709

Parameter

AD7709A, AD7709B

Unit

Test Conditions

EXCITATION CURRENT SOURCES

(IEXC1, IEXC2, and IEXC3)

Output Current

IEXC1, IEXC2

200

mA nom

IEXC3

mA nom

Initial Tolerance at 25

∞C

±10

% typ

Drift

200

ppm/

∞C typ

Initial Current Matching at 25

∞C

±2.5

% max

B Grade, No Load

(between IEXC1 and IEXC2)

±2.5

% typ

A Grade, No Load

Drift Matching

(between IEXC1 and IEXC2)

ppm/

∞C typ

Initial Current Matching at 25

∞C

±5% max

B Grade, No Load

(between 8

IEXC3 and

IEXC1/IEXC2)

±5% typ

A Grade, No Load

Drift Matching

(between 8

IEXC3 and

IEXC1/IEXC2)

ppm/

∞C typ

Line Regulation

VDD = 5 V

± 5%

IEXC1, IEXC2

1.25

mA/V typ

A, B Grades

2.6

mA/V max

B Grade

IEXC3

mA/V max

B Grade

mA/V typ

A Grade

Load Regulation

300

nA/V typ

Output Compliance

VDD – 0.6

V max

GND –30 mV

V min

LOW-SIDE POWER SWITCHES

(SW1 and SW2)

RON

W typ

VDD = 5 V, A and B Grade

W max

B Grade

4.5

W typ

VDD = 3 V, A and B Grade

Wmax

B Grade

Allowable Current

mA max

Continuous Current per Switch

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 (except XTAL)

±2

mA max

VIN = VDD

–70

mA max

VIN = GND, Typically –40

mA @ 5 V and

–20

mA at 3 V; Weak Pull-Ups on the

Logic Inputs

Input Capacitance

pF typ

All Digital Inputs

(continued)

SPECIFICATIONS

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