AD7718–SPECIFICATIONS1 (AV DD
參數(shù)資料
型號: AD7708BRZ-REEL
廠商: Analog Devices Inc
文件頁數(shù): 34/44頁
文件大?。?/td> 0K
描述: IC ADC 16BIT R-R 8/10CH 28SOIC
標準包裝: 1,000
位數(shù): 16
采樣率(每秒): 1.37k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數(shù)目: 1
功率耗散(最大): 3.84mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 28-SOIC W
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 4 個差分,單極;4 個差分,雙極;8 個偽差分,單極;8 個偽差分,雙極
配用: EVAL-AD7708EBZ-ND - BOARD EVAL FOR AD7708
REV. 0
–4–
AD7718–SPECIFICATIONS1 (AV
DD = 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
5.4
Hz min
CHOP = 0
105
Hz max
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 in
ADC Description
Integral Nonlinearity
±10
ppm of FSR max
2 ppm Typical
Offset Error
3
±3
V typ
Offset Error Drift vs. Temp
4
10
nV/
°C typ
Full-Scale Error
3
±10
V/°C typ
Gain Drift vs. Temp
4
±0.5
ppm/
°C typ
ANALOG INPUTS
Differential Input Full-Scale Voltage
±1.024 × REFIN/GAIN V nom
REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) REFIN(–)
GAIN = 1 to 128
Range Matching
±2
V typ
Analog Input = 18 mV
Absolute AIN Voltage Limits
AGND + 100 mV
V min
AIN1–AIN10 and AINCOM with
AVDD – 100 mV
V max
NEGBUF = 1
Absolute AINCOM Voltage Limits
AGND – 30 mV
V min
NEGBUF = 0
AVDD + 30 mV
V max
Analog Input Current
AIN1–AIN10 and AINCOM with
NEGBUF = 1
DC Input Current
2
±1
nA max
DC Input Current Drift
±5
pA/
°C typ
AINCOM Input Current
NEGBUF = 0
DC Input Current
2
±125
nA/V typ
±2.56 V Range
DC Bias Current Drift
±2
pA/V/
°C typ
Normal-Mode Rejection
2
@ 50 Hz
100
dB min
50 Hz
± 1 Hz, SF Word = 82
@ 60 Hz
100
dB min
60 Hz
± 1 Hz, SF Word = 68
Common-Mode Rejection
@ DC
90
dB min
100 dB typ, Analog Input = 1 V,
Input Range =
±2.56 V
110 dB typ on
±20 mV Range
@ 50 Hz
2
100
dB min
50 Hz
± 1 Hz, 20 Hz Update Rate
@ 60 Hz
2
100
dB min
60 Hz
± 1 Hz, 20 Hz Update Rate
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage
2.5
V nom
REFIN Refers to Both REFIN1 and
REFIN2
REFIN(+) to REFIN(–) Range
2
1V min
AVDD
V max
REFIN Common-Mode Range
AGND – 30 mV
V min
AVDD + 30 mV
V max
Reference DC Input Current
2
±0.5
A/V typ
Reference DC Input Current Drift
±0.01
nA/V/
°C typ
Normal-Mode Rejection
2
@ 50 Hz
100
dB min
50 Hz
± 1 Hz, SF Word = 82
@ 60 Hz
100
dB min
60 Hz
± 1 Hz, SF Word = 68
Common-Mode Rejection
2
Input Range =
±2.56 V
@ DC
110
dB typ
Analog Input = 1 V
@ 50 Hz
110
dB typ
50 Hz
± 1 Hz, 20 Hz Update Rate
@ 60 Hz
110
dB typ
60 Hz
± 1 Hz, 20 Hz Update Rate
LOGIC INPUTS
5
All Inputs Except SCLK and XTAL1
2
VINL, Input Low Voltage
0.8
V max
DVDD = 5 V
VINL, Input Low Voltage
0.4
V max
DVDD = 3 V
VINH, Input High Voltage
2.0
V min
DVDD = 3 V or 5 V
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