AD7708BRUZ-REEL View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD7708BRUZ-REEL Datasheet PDF : 44 Pages
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AD7718–SPECIFICATIONS1
(AVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, DVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) =
2.5 V ; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffer Enabled. All specifications TMIN to TMAX unless otherwise noted.)
Parameter
B Grade
Unit
Test Conditions
AD7718 (CHOP ENABLED)
Output Update Rate
No Missing Codes2
Resolution
Output Noise and Update Rates
Integral Nonlinearity
Offset Error3
Offset Error Drift vs. Temp4
Full-Scale Error3
Gain Drift vs. Temp4
5.4
105
24
13
18
See Tables in
ADC Description
± 10
±3
10
± 10
± 0.5
Hz min
Hz max
Bits min
Bits p-p
Bits p-p
ppm of FSR max
µV typ
nV/°C typ
µV/°C typ
ppm/°C typ
CHOP = 0
20 Hz Update Rate
± 20 mV Range, 20 Hz Update Rate
± 2.56 V Range, 20 Hz Update Rate
2 ppm Typical
ANALOG INPUTS
Differential Input Full-Scale Voltage
Range Matching
Absolute AIN Voltage Limits
Absolute AINCOM Voltage Limits
Analog Input Current
DC Input Current2
DC Input Current Drift
AINCOM Input Current
DC Input Current2
DC Bias Current Drift
Normal-Mode Rejection2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz2
@ 60 Hz2
±1.024 × REFIN/GAIN V nom
±2
AGND + 100 mV
AVDD – 100 mV
AGND – 30 mV
AVDD + 30 mV
±1
±5
± 125
±2
100
100
90
µV typ
V min
V max
V min
V max
nA max
pA/°C typ
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
100
dB min
100
dB min
REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) REFIN(–)
GAIN = 1 to 128
Analog Input = 18 mV
AIN1–AIN10 and AINCOM with
NEGBUF = 1
NEGBUF = 0
AIN1–AIN10 and AINCOM with
NEGBUF = 1
NEGBUF = 0
± 2.56 V Range
50 Hz ± 1 Hz, SF Word = 82
60 Hz ± 1 Hz, SF Word = 68
100 dB typ, Analog Input = 1 V,
Input Range = ±2.56 V
110 dB typ on ± 20 mV Range
50 Hz ± 1 Hz, 20 Hz Update Rate
60 Hz ± 1 Hz, 20 Hz Update Rate
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage
2.5
REFIN(+) to REFIN(–) Range2
REFIN Common-Mode Range
Reference DC Input Current2
Reference DC Input Current Drift
Normal-Mode Rejection2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection2
@ DC
@ 50 Hz
@ 60 Hz
LOGIC INPUTS5
All Inputs Except SCLK and XTAL12
VINL, Input Low Voltage
VINL, Input Low Voltage
VINH, Input High Voltage
1
AVDD
AGND – 30 mV
AVDD + 30 mV
± 0.5
± 0.01
100
100
110
110
110
0.8
0.4
2.0
V nom
V min
V max
V min
V max
µA/V typ
nA/V/°C typ
dB min
dB min
dB typ
dB typ
dB typ
V max
V max
V min
REFIN Refers to Both REFIN1 and
REFIN2
50 Hz ± 1 Hz, SF Word = 82
60 Hz ± 1 Hz, SF Word = 68
Input Range = ± 2.56 V
Analog Input = 1 V
50 Hz ± 1 Hz, 20 Hz Update Rate
60 Hz ± 1 Hz, 20 Hz Update Rate
DVDD = 5 V
DVDD = 3 V
DVDD = 3 V or 5 V
–4–
REV. 0
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