參數(shù)資料
型號(hào)： EVAL-AD7719EB
廠商： Analog Devices, Inc.
英文描述： Connector Backshell
中文描述： 低電壓，低功耗，工廠校準(zhǔn)，16-/24-Bit雙ADC
文件頁(yè)數(shù)： 3/40頁(yè)
文件大?。?/td> 367K
代理商： EVAL-AD7719EB
REV. 0
–3–
AD7719–SPECIFICATIONS
1
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications T
MIN
to T
MAX
unless otherwise noted.)
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V,
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 Codes
2
Resolution
24
13
18
See Tables II to V
±
10
±
3
±
10
±
10
±
0.5
80
Bits min
Bits p-p
Bits p-p
20 Hz Update Rate
±
20 mV Range, 20 Hz Update Rate
±
2.56 V Range, 20 Hz Update Rate
Output Noise and Update Rates
Integral Nonlinearity
Offset Error
3
Offset Error Drift vs. Temperature
4
Full-Scale Error
5, 8, 9
Gain Drift vs. Temperature
4
Power Supply Rejection (PSR)
ppm of FSR max
μ
V typ
nV/
°
C typ
μ
V typ
ppm/
°
C typ
dB min
Typically 2 ppm.
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
±
1.024
×
REFIN1/GAIN
V nom
REFIN1 = REFIN1(+) – REFIN1(–)
GAIN = 1 to 128.
Input Voltage = 19 mV on All Ranges
BUF
= 0; Buffered Mode of Operation
ADC Range Matching
Absolute AIN Voltage Limits
±
2
AGND + 100 mV
AV
DD
– 100 mV
μ
V typ
V min
V max
Analog Input Current
2
DC Input Current
DC Input Current Drift
Absolute AIN Voltage Limits
BUF
= 0
±
1
±
5
AGND – 30 mV
AV
DD
+ 30 mV
nA max
pA /
°
C typ
V min
V max
BUF
= 1; Unbuffered mode of operation.
Analog Input Current
DC Input Current
DC Input Current Drift
Normal-Mode Rejection
2, 6
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
BUF =
1. Unbuffered Mode of Operation.
Input Current Varies with Input Voltage
±
125
±
2
nA/V typ
pA/V/
°
C typ
100
100
dB min
dB min
50 Hz
±
1 Hz, 16.65 Hz Update Rate, SF = 82
60 Hz
±
1 Hz, 20 Hz Update Rate, SF = 68
90
dB min
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
@ 50 Hz
2
@ 60 Hz
2
100
100
dB min
dB min
REFERENCE INPUT (REFIN1)
REFIN1 Voltage
REFIN1 Voltage Range
2
2.5
1
AV
AGND – 30 mV
AV
DD
+ 30 mV
0.5
±
0.01
V nom
V min
V max
V min
V max
μ
A/V typ
nA/V/
°
C typ
REFIN1 = REFIN1(+) – REFIN1(–)
REFIN1 Common-Mode Range
Reference DC Input Current
Reference DC Input Current Drift
Normal-Mode Rejection
2, 6
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz
@ 60 Hz
Reference Detect Levels
100
100
dB min
dB min
50 Hz
±
1 Hz, SF = 82
60 Hz
±
1 Hz, SF = 68
110
110
110
0.3
0.65
dB typ
dB typ
dB typ
V min
V max
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 Codes
2
Resolution
Output Noise and Update Rates
Integral Nonlinearity
16
16
See Tables VI and VIII
±
15
Bits min
Bits p-p
±
2.5 V Range, 20 Hz Update Rate
ppm of FSR max
FSR
REFIN
Gain
=
×
2
1 024
.
1
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