AD7709 Analog Devices, AD7709 Datasheet - Page 4

• Manufacturer Part Number: AD7709
• Description: 16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port
• Manufacturer: Analog Devices

Specifications of AD7709

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7709
SPECIFICATIONS
Parameter
EXCITATION CURRENT SOURCES
LOW-SIDE POWER SWITCHES
LOGIC INPUTS
(IEXC1, IEXC2, and IEXC3)
(SW1 and SW2)
All Inputs Except SCLK and XTAL1
SCLK Only (Schmitt-Triggered Input)
XTAL1 Only
Input Currents (except XTAL)
Input Capacitance
Output Current
Initial Tolerance at 25∞C
Drift
Initial Current Matching at 25∞C
Drift Matching
Initial Current Matching at 25∞C
Drift Matching
Line Regulation
Load Regulation
Output Compliance
R
Allowable Current
V
V
V
V
V
V
V
V
V
V
V
V
ON
INL
INH
T(+)
T(–)
T(+)
T(+)
T(–)
T(+)
INL
INH
INL
INH
IEXC1, IEXC2
IEXC3
(between IEXC1 and IEXC2)
(between IEXC1 and IEXC2)
(between 8
IEXC1/IEXC2)
(between 8
IEXC1/IEXC2)
IEXC1, IEXC2
IEXC3
, Input Low Voltage
, Input Low Voltage
, Input Low Voltage
, Input High Voltage
, Input High Voltage
, Input High Voltage
– V
– V
T(–)
T(–)
2
IEXC3 and
IEXC3 and
2
(continued)
2
2
200
25
± 10
200
± 2.5
± 2.5
20
± 5
± 5
20
1.25
2.6
1
1
300
V
GND –30 mV
3
5
4.5
7
20
0.4
2.0
1.4/2
0.8/1.4
0.3/0.85
0.95/2
0.4/1.1
0.3/0.85
3.5
2.5
± 2
–70
10
AD7709A, AD7709B
0.8
0.8
0.4
DD
– 0.6
–4–
Unit
mA nom
mA nom
% typ
ppm/∞C typ
% max
% typ
ppm/∞C typ
% max
% typ
ppm/∞C typ
mA/V typ
mA/V max
mA/V max
mA/V typ
nA/V typ
V max
V min
W typ
W max
W typ
W max
mA max
V max
V max
V min
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V max
V min
V max
V min
mA max
mA max
pF typ
Test Conditions
B Grade, No Load
A Grade, No Load
B Grade, No Load
A Grade, No Load
V
A, B Grades
B Grade
B Grade
A Grade
V
B Grade
V
B Grade
Continuous Current per Switch
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
–20 mA at 3 V; Weak Pull-Ups on the
Logic Inputs
All Digital Inputs
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
IN
IN
= V
= GND, Typically –40 mA @ 5 V and
= 5 V ± 5%
= 5 V, A and B Grade
= 3 V, A and B Grade
= 5 V
= 3 V
= 3 V or 5 V
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
= 5 V
= 5 V
= 3 V
= 3 V
DD
REV. A