參數(shù)資料
型號(hào): EVAL-AD7795EBZ
廠商: Analog Devices Inc
文件頁數(shù): 33/37頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD7795
標(biāo)準(zhǔn)包裝: 1
ADC 的數(shù)量: 1
位數(shù): 16
采樣率(每秒): 470
數(shù)據(jù)接口: SPI?、QSPI?、MICROWIRE? 和 DSP
輸入范圍: ±VREF/增益
在以下條件下的電源(標(biāo)準(zhǔn)): 2.5mW @ 470SPS
工作溫度: -40°C ~ 105°C
已用 IC / 零件: AD7795
已供物品:
AD7794/AD7795
Rev. D | Page 4 of 36
Parameter1
AD7794/AD7795
Unit
Test Conditions/Comments
Common-Mode Rejection
AD7794B/AD7795B
@ DC
100
dB min
AIN = 1 V/gain, gain ≥ 4
@ 50 Hz, 60 Hz2
100
dB min
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz, 60 Hz2
100
dB min
50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000
AD7794C
@ DC
97
dB min
AIN = 1 V/gain, gain ≥ 4
@ 50 Hz, 60 Hz2
97
dB min
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz, 60 Hz2
97
dB min
50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000
CHOP DISABLED
Output Update Rate
4.17 to 470
Hz nom
Settling time = 1/output update rate
No Missing Codes2
AD7794
24
Bits min
fADC ≤ 123 Hz
AD7795
16
Bits min
Resolution
RMS Noise and Update Rates
Integral Nonlinearity
±15
ppm of FSR
max
Offset Error3
±100/gain
μV typ
Without calibration
Offset Error Drift vs. Temperature4
±100/gain
nV/°C typ
Gain = 1 to 16
10
nV/°C typ
Gain = 32 to 128
Full-Scale Error3, 5
±10
μV typ
Gain Drift vs. Temperature4
±1
ppm/°C typ
Gain = 1 to 16, external reference
±3
ppm/°C typ
Gain = 32 to 128, external reference
Power Supply Rejection
100
dB typ
AIN = 1 V/gain, gain ≥ 4, external reference
ANALOG INPUTS
Differential Input Voltage Ranges
±VREF/gain
V nom
VREF = REFIN(+) REFIN(), or internal reference,
gain = 1 to 128
Absolute AIN Voltage Limits2
Unbuffered Mode
GND 30 mV
V min
Gain = 1 or 2
AVDD + 30 mV
V max
Buffered Mode
GND + 100 mV
V min
Gain = 1 or 2
AVDD 100 mV
V max
In-Amp Active
GND + 300 mV
V min
Gain = 4 to 128
AVDD 1.1
V max
Common-Mode Voltage, VCM
0.2 + (gain/2 × (AIN(+)
AIN()))
V min
AMP CM = 1, VCM = (AIN(+) + AIN(–))/2, gain = 4 to 128
AVDD 0.2 (gain/2 ×
(AIN(+) AIN()))
V max
Analog Input Current
Buffered Mode or In-Amp
Active
Average Input Current2
AD7794B/AD7795B
±1
nA max
Gain = 1 or 2
±250
pA max
Gain = 4 to 128
±1
nA max
AIN6(+)/AIN6()
AD7794C
±3
nA max
Gain = 1 or 2
±2
nA max
Gain = 4 to 128
±3
nA max
AIN6(+)/AIN6()
Average Input Current Drift
±2
pA/°C typ
Unbuffered Mode
Gain = 1 or 2
Average Input Current
±400
nA/V typ
Input current varies with input voltage
Average Input Current Drift
±50
pA/V/°C typ
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