参数资料
型号: AD8218BRMZ-R7
厂商: Analog Devices Inc
文件页数: 3/16页
文件大小: 354K
描述: IC CURRENT MONITOR BI-DIR 8MSOP
标准包装: 1,000
功能: 电流监控器
检测方法: 高端
精确度: ±0.35%
输入电压: 4 V ~ 80 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 带卷 (TR)
Data Sheet
AD8218
 
Rev. B | Page 3 of 16
SPECIFICATIONS
T
OPR
 = 40癈 to +125癈, T
A
 = 25癈, R
L
 = 25 k& (R
L
 is the output load resistor), input common-mode voltage (V
CM
) = 4 V, unless
otherwise noted.
Table 1.
Parameter 
Min
Typ
Max
Unit
Test Conditions/Comments 
GAIN
 
 
 
 
 
Initial
 
20
 
V/V
 
Accuracy
 
?.1
 
%
V
O
 e 0.1 V dc, T
A
Accuracy over Temperature
 
 
?.35
%
TOPR
Gain vs. Temperature
 
?
 
ppm/癈     T
OPR
 
VOLTAGE OFFSET
 
 
 
 
 
Offset Voltage (RTI
1
)
 
 
?00
25癈
Over Temperature (RTI
1
)
 
 
?00
TOPR
Offset Drift
 
?00
 
nV/癈
T
OPR
 
INPUT
 
 
 
 
 
Bias Current
2
 
 
130
 
T
A
, input common mode = 4 V, V
S
 = 4 V
 
 
 
220
TOPR, input common mode = 4 V, VS = 4 V
Common-Mode Input Voltage Range
4
 
80
V
Common-mode continuous
Differential Input Voltage Range
3
 
0
 
250
mV
Differential input voltage
Common-Mode Rejection (CMRR)
90
110
 
dB
TOPR
OUTPUT
 
 
 
 
 
Output Voltage Range Low
0.01
 
 
V
 
Output Voltage Range High
 
 
VS  0.1     V
TA
 
Out  ut Im  edance
 
2
 
&
 
INTERNAL REFERENCE (ENB PIN CONNECTED TO GND)
 
 
 
 
 
Initial Value
 
80
 
mV
Voltage at OUT with a differential input of
V  n
mm n-m
in
f4V
Offset (RTI
1
)
150
 
+150
 
Offset Drift (RTO
4
)
 
?0
 
礦/癈
V
S
 = NC or V
S
 = 5 V
REFERENCE INPUT (REF, PIN 7)
 
 
 
 
 
Input Impedance
 
1.5
 
M&
 
Input Current
3
 
60
Dependent on V
REF
/1.5 M&
Input Voltage Range
0
 
5
V
ENB not connected to GND
Input-to-Output Gain
 
1 ?0.0001     
V/V
 
DYNAMIC RESPONSE
 
 
 
 
 
Small-Signal 3 dB Bandwidth
 
450
 
kHz
 
Slew Rate
 
1
 
V/祍
 
NOISE
 
 
 
 
 
0.1 Hz to 10 Hz (RTI
1
)
 
2.3
 
礦 p-p
 
Spectral Density, 1 kHz (RTI
1
)
 
110
 
nV/Hz
 
POWER SUPPLY
 
 
 
 
 
Operating Range (Pin 2 Floating)
4
 
80
V
Power regulated from common mode,
VS pin floating
V
S
 Range (Pin 2)
4
 
5.5
V
V
S
 must be less than 5.5 V if standalone
supply is used
Quiescent Current over Tem  erature
 
 
800
A
Throu  hout in  ut common mode
Power Supply Rejection Ratio (PSRR)
90
110
 
dB
T
OPR
 
TEMPERATURE RANGE
 
 
 
 
 
For Specified Performance
40
 
+125
 
 
1
 RTI = referred to input.
2
 Refer to Figure 9 for more information on the input bias current. This current varies based on the input common-mode voltage. The input bias current flowing to the
+IN pin is also the supply current to the internal LDO.
3
 The differential input voltage is specified as 250 mV because the output is internally clamped to 5.2 V. This ensures that the output voltage does not exceed the typical
ADC input range, preventing damage. The AD8218 can survive up to ? V differentially but will only amplify ~250 mV correctly due to the output clamping function.
4
 RTO = referred to output.
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