Datasheet

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 25 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) 20 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) 20 ppm/∞C typ
Line Regulation V
DD
= 5 V ± 5%
IEXC1, IEXC2 1.25 mA/V typ A, B Grades
2.6 mA/V max B Grade
IEXC3 1 mA/V max B Grade
1 mA/V typ A Grade
Load Regulation 300 nA/V typ
Output Compliance V
DD
– 0.6 V max
GND –30 mV V min
LOW-SIDE POWER SWITCHES
(SW1 and SW2)
R
ON
3 W typ V
DD
= 5 V, A and B Grade
5 W max B Grade
4.5 W typ V
DD
= 3 V, A and B Grade
7 W max B Grade
Allowable Current
2
20 mA max Continuous Current per Switch
LOGIC INPUTS
All Inputs Except SCLK and XTAL1
2
V
INL
, Input Low Voltage 0.8 V max V
DD
= 5 V
0.4 V max V
DD
= 3 V
V
INH
, Input High Voltage 2.0 V min V
DD
= 3 V or 5 V
SCLK Only (Schmitt-Triggered Input)
2
V
T(+)
1.4/2 V min/V max V
DD
= 5 V
V
T(–)
0.8/1.4 V min/V max V
DD
= 5 V
V
T(+)
– V
T(–)
0.3/0.85 V min/V max V
DD
= 5 V
V
T(+)
0.95/2 V min/V max V
DD
= 3 V
V
T(–)
0.4/1.1 V min/V max V
DD
= 3 V
V
T(+)
– V
T(–)
0.3/0.85 V min/V max V
DD
= 3 V
XTAL1 Only
2
V
INL
, Input Low Voltage 0.8 V max V
DD
= 5 V
V
INH
, Input High Voltage 3.5 V min V
DD
= 5 V
V
INL
, Input Low Voltage 0.4 V max V
DD
= 3 V
V
INH
, Input High Voltage 2.5 V min V
DD
= 3 V
Input Currents (except XTAL) ± 2 mA max V
IN
= V
DD
–70 mA max V
IN
= GND, Typically –40 mA @ 5 V and
–20 mA at 3 V; Weak Pull-Ups on the
Logic Inputs
Input Capacitance 10 pF typ All Digital Inputs
(continued)
SPECIFICATIONS