(AVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV" />
參數(shù)資料
型號(hào)： EVAL-AD7719EBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 23/40頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7719
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 2
位數(shù)： 16，24
采樣率（每秒）： 105
數(shù)據(jù)接口： 串行
輸入范圍： 2 Vpp
在以下條件下的電源（標(biāo)準(zhǔn)）： 4.85mW @ 105SPS
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7719
已供物品： 板
REV. A
–3–
AD7719
(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
Hz min
Both Channels Synchronized
105
Hz max
0.732 ms Increments
MAIN CHANNEL
No Missing Codes
2
24
Bits min
20 Hz Update Rate
Resolution
13
Bits p-p
±20 mV Range, 20 Hz Update Rate
18
Bits p-p
±2.56 V Range, 20 Hz Update Rate
Output Noise and Update Rates
See Tables II to V
Integral Nonlinearity
±10
ppm of FSR max
Typically 2 ppm.
Offset Error
3
±3
V typ
Offset Error Drift vs. Temperature
4
±10
nV/°C typ
Full-Scale Error
5, 6, 7
±10
V typ
At the Calibrated Conditions
Gain Drift vs. Temperature
4
±0.5
ppm/°C typ
Power Supply Rejection (PSR)
80
dB min
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.
ADC Range Matching
±2
V typ
Input Voltage = 19 mV on All Ranges
Absolute AIN Voltage Limits
AGND + 100 mV
V min
BUF = 0; Buffered Mode of Operation
AVDD – 100 mV
V max
Analog Input Current
2
BUF = 0
DC Input Current
±1
nA max
DC Input Current Drift
±5
pA /°C typ
Absolute AIN Voltage Limits
AGND – 30 mV
V min
BUF = 1; Unbuffered mode of operation.
AVDD + 30 mV
V max
Analog Input Current
BUF = 1. Unbuffered Mode of Operation.
DC Input Current
±125
nA/V typ
Input Current Varies with Input Voltage
DC Input Current Drift
±2
pA/V/°C typ
Normal-Mode Rejection
2, 8
@ 50 Hz
100
dB min
50 Hz ± 1 Hz, 16.65 Hz Update Rate, SF = 82
@ 60 Hz
100
dB min
60 Hz ± 1 Hz, 20 Hz Update Rate, SF = 68
Common-Mode Rejection
@ DC
90
dB min
Input Range = ±2.56 V, AIN = 1 V.
100 dB typ. 110 dB typ on ±20 mV Range
@ 50 Hz
2
100
dB min
50 Hz ± 1 Hz, Range = ±2.56 V, AIN = 1 V
@ 60 Hz
2
100
dB min
60 Hz ± 1 Hz, Range = ±2.56 V, AIN = 1 V
REFERENCE INPUT (REFIN1)
REFIN1 Voltage
2.5
V nom
REFIN1 = REFIN1(+) – REFIN1(–)
REFIN1 Voltage Range
2
1V min
AVDD
V max
REFIN1 Common-Mode Range
AGND – 30 mV
V min
AVDD + 30 mV
V max
Reference DC Input Current
0.5
A/V typ
Reference DC Input Current Drift
±0.01
nA/V/°C typ
Normal-Mode Rejection
2, 8
@ 50 Hz
100
dB min
50 Hz ± 1 Hz, SF = 82
@ 60 Hz
100
dB min
60 Hz ± 1 Hz, SF = 68
Common-Mode Rejection
@ DC
110
dB typ
Input Range = ±2.56 V, AIN = 1 V
@ 50 Hz
110
dB typ
50 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
@ 60 Hz
110
dB typ
60 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
Reference Detect Levels
0.3
V min
NOXREF Bit Active if VREF < 0.3 V
0.65
V max
NOXREF Bit Inactive if VREF > 0.65 V
AUXILIARY CHANNEL
No Missing Codes
2
16
Bits min
Resolution
16
Bits p-p
±2.5 V Range, 20 Hz Update Rate
Output Noise and Update Rates
See Tables VI and VIII
Integral Nonlinearity
±15
ppm of FSR max
FSR
REFIN
Gain
= ×
21 024
1
.
–SPECIFICATIONS1
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