AD7708BRUZ View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD7708BRUZ Datasheet PDF : 44 Pages
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AD7708/AD7718
AD7708 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 Buffers Enabled. All specifications TMIN to
TMAX unless otherwise noted.)
Parameter
AD7708 (CHOP DISABLED)
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
Negative Full-Scale Error
ANALOG INPUTS
Differential Input Full-Scale Voltage
B Grade
Unit
16.06
Hz min
1.365
kHz max
16
Bits min
13
Bits p-p
16
Bits p-p
See Tables in ADC Description
± 15
ppm of FSR max
± 0.65
LSB typ
± 200
nV/°C typ
± 0.75
LSB typ
± 0.5
ppm/°C typ
± 0.003
% FSR typ
±1.024 × REFIN/GAIN V nom
Absolute AIN Voltage Limits
Absolute AINCOM Voltage Limits
Analog Input Current
DC Input Current2
DC Bias Current Drift
AINCOM Input Current
DC Input Current2
DC Bias Current Drift
Normal-Mode Rejection2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
AGND + 100 mV
AVDD – 100 mV
AGND – 30 mV
AVDD + 30 mV
±1
±5
± 125
±2
100
100
90
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
@ 50 Hz
100
@ 60 Hz
100
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage
2.5
REFIN(+) to REFIN(–) Range2
REFIN Common-Mode Range
Reference DC Input Current
Reference DC Input Current Drift
Normal-Mode Rejection2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz
@ 60 Hz
1
AVDD
AGND – 30 mV
AVDD + 30 mV
0.5
± 0.1
100
100
100
100
100
dB typ
dB typ
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
Test Conditions
CHOP = 1
± 20 mV Range, SF Word = 69
± 2.56 V Range, SF Word = 69
2ppm Typical
Following a Self-Calibration
REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) – REFIN(–)
GAIN = 1 to 128
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, SF Word = 82
60 Hz ± 1 Hz, SF Word = 68
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. Input Range = ±2.56 V
–6–
REV. 0
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