AD7719 データシートの表示（PDF） - Analog Devices
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AD7719 Datasheet PDF : 40 Pages
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AD7719–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; all specifications TMIN to TMAX, unless otherwise noted.)
Parameter
AD7719B
Unit
Test Conditions
ADC CHANNEL SPECIFICATION
Output Update Rate
5.4
105
Hz min
Hz max
Both Channels Synchronized
0.732 ms Increments
MAIN CHANNEL
No Missing Codes2
Resolution
Output Noise and Update Rates
Integral Nonlinearity
Offset Error3
Offset Error Drift vs. Temperature4
Full-Scale Error5, 6, 7
Gain Drift vs. Temperature4
Power Supply Rejection (PSR)
24
13
18
See Tables II to V
±10
±3
±10
±10
±0.5
80
Bits min
Bits p-p
Bits p-p
ppm of FSR max
µV typ
nV/°C typ
µV typ
ppm/°C typ
dB min
20 Hz Update Rate
±20 mV Range, 20 Hz Update Rate
±2.56 V Range, 20 Hz Update Rate
Typically 2 ppm. FSR = 2 × 1.024 REFIN1
Gain
At the Calibrated Conditions
Input Range = ±2.56 V, 100 dB typ.
110 dB typ on ±20 mV Range
ANALOG INPUTS
Differential Input Voltage Ranges
ADC Range Matching
Absolute AIN Voltage Limits
Analog Input Current2
DC Input Current
DC Input Current Drift
Absolute AIN Voltage Limits
Analog Input Current
DC Input Current
DC Input Current Drift
Normal-Mode Rejection2, 8
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz2
@ 60 Hz2
±1.024 × REFIN1/GAIN V nom
±2
AGND + 100 mV
AVDD – 100 mV
±1
±5
AGND – 30 mV
AVDD + 30 mV
±125
±2
µV typ
V min
V max
nA max
pA /°C typ
V min
V max
nA/V typ
pA/V/°C typ
100
dB min
100
dB min
90
dB min
100
dB min
100
dB min
REFIN1 = REFIN1(+) – REFIN1(–)
GAIN = 1 to 128.
Input Voltage = 19 mV on All Ranges
BUF = 0; Buffered Mode of Operation
BUF = 0
BUF = 1; Unbuffered mode of operation.
BUF = 1. Unbuffered Mode of Operation.
Input Current Varies with Input Voltage
50 Hz ± 1 Hz, 16.65 Hz Update Rate, SF = 82
60 Hz ± 1 Hz, 20 Hz Update Rate, SF = 68
Input Range = ±2.56 V, AIN = 1 V.
100 dB typ. 110 dB typ on ±20 mV Range
50 Hz ± 1 Hz, Range = ±2.56 V, AIN = 1 V
60 Hz ± 1 Hz, Range = ±2.56 V, AIN = 1 V
REFERENCE INPUT (REFIN1)
REFIN1 Voltage
REFIN1 Voltage Range2
REFIN1 Common-Mode Range
Reference DC Input Current
Reference DC Input Current Drift
Normal-Mode Rejection2, 8
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz
@ 60 Hz
Reference Detect Levels
2.5
1
AVDD
AGND – 30 mV
AVDD + 30 mV
0.5
±0.01
100
100
110
110
110
0.3
0.65
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 min
V max
REFIN1 = REFIN1(+) – REFIN1(–)
50 Hz ± 1 Hz, SF = 82
60 Hz ± 1 Hz, SF = 68
Input Range = ±2.56 V, AIN = 1 V
50 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
60 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
NOXREF Bit Active if VREF < 0.3 V
NOXREF Bit Inactive if VREF > 0.65 V
AUXILIARY CHANNEL
No Missing Codes2
Resolution
Output Noise and Update Rates
Integral Nonlinearity
16
16
See Tables VI and VIII
±15
Bits min
Bits p-p
ppm of FSR max
±2.5 V Range, 20 Hz Update Rate
REV. A
–3–
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