参数资料
型号: EVAL-AD7798EBZ
厂商: Analog Devices Inc
文件页数: 22/28页
文件大小: 0K
描述: BOARD EVAL FOR AD7798
标准包装: 1
ADC 的数量: 1
位数: 16
采样率(每秒): 470
数据接口: 串行
输入范围: ±VREF/增益
在以下条件下的电源(标准): 2.5mW @ 470SPS
工作温度: -40°C ~ 105°C
已用 IC / 零件: AD7798
已供物品: 板,缆线,CD
Data Sheet
AD7798/AD7799
Rev. B | Page 3 of 28
SPECIFICATIONS
AVDD = 2.7 V to 5.25 V; DVDD = 2.7 V to 5.25 V; GND = 0 V; REFIN(+) = AVDD; REFIN() = 0 V. All specifications TMIN to TMAX, unless
otherwise noted.
Table 1.
Parameter
AD7798B/AD7799B1
Unit
Test Conditions/Comments
ADC CHANNEL
Output Update Rate
4.17 470
Hz nom
No Missing Codes2
24
Bits min
AD7799: fADC < 242 Hz
16
Bits min
AD7798
Resolution
Output Noise and Update Rates
Integral Nonlinearity
±15
ppm of FSR max
Offset Error3
±1
V typ
Offset Error Drift vs. Temperature4
±10
nV/°C typ
Full-Scale Error3, 5
±10
V typ
Gain Drift vs. Temperature4
±1
ppm/°C typ
Power Supply Rejection
100
dB min
AIN = 1 V/gain, gain ≥ 4
ANALOG INPUTS
Differential Input Voltage Ranges
±VREF/gain
V nom
VREF = REFIN(+) – REFIN(–), 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
0.5
V min
VCM = (AIN(+) + AIN())/2, gain = 4 to 128
Analog Input Current
Buffered Mode or In-Amp Active
Average Input Current2
±1
nA max
Gain = 1 or 2, update rate < 100 Hz
±250
pA max
Gain = 4 to 128, update rate < 100 Hz
±1
nA max
AIN3(+)/AIN3(), update rate < 100 Hz
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
Normal Mode Rejection2
@ 50 Hz, 60 Hz
65
dB min
80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz (FS[3:0] = 1010)6
@ 50 Hz
80
dB min
90 dB typ, 50 ± 1 Hz (FS[3:0] = 1001)6
@ 60 Hz
90
dB min
100 dB typ, 60 ± 1 Hz (FS[3:0] = 1000)6
Common-Mode Rejection
@ 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)6
@ 50 Hz, 60 Hz2
100
dB min
50 ± 1 Hz (FS[3:0] = 10016), 60 ± 1 Hz
(FS[3:0] = 10006)
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