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| 型号： | AD8220BRMZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST JFET R-R 15MA 8MSOP |
| 产品培训模块： | Power Line Monitoring |
| 设计资源： | Fully Isolated Input Module Based on AD7793, ADuM5401, and a High Performance In-Amp (CN0067) |
| 标准包装： | 1,000 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 2 V/µs |
| -3db带宽： | 1.5MHz |
| 电流 - 输入偏压： | 10pA |
| 电压 - 输入偏移： | 125µV |
| 电流 - 电源： | 750µA |
| 电流 - 输出 / 通道： | 15mA |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 36 V，±2.25 V ~ 18 V |
| 工作温度： | -40°C ~ 85°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) |
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AD8220
Rev. B | Page 21 of 28
REFERENCE TERMINAL
The reference terminal, REF, is at one end of a 20 kΩ resistor
(see Figure 55). The output of the instrumentation amplifier is
referenced to the voltage on the REF terminal; this is useful
when the output signal needs to be offset to voltages other than
common. For example, a voltage source can be tied to the REF
pin to level-shift the output so that the AD8220 can interface
with an ADC. The allowable reference voltage range is a function of
the gain, common-mode input, and supply voltages. The REF
pin should not exceed either +VS or VS by more than 0.5 V.
For best performance, especially in cases where the output is
not measured with respect to the REF terminal, source impedance
to the REF terminal should be kept low, because parasitic
resistance can adversely affect CMRR and gain accuracy.
POWER SUPPLY REGULATION AND BYPASSING
The AD8220 has high PSRR. However, for optimal
performance, a stable dc voltage should be used to power
the instrumentation amplifier. Noise on the supply pins can
adversely affect performance. As in all linear circuits, bypass
capacitors must be used to decouple the amplifier.
A 0.1 μF capacitor should be placed close to each supply pin.
A 10 μF tantalum capacitor can be used further away from the
part (see Figure 59). In most cases, it can be shared by other
precision integrated circuits.
AD8220
+VS
+IN
–IN
LOAD
REF
0.1F
10F
0.1F
10F
–VS
VOUT
0
35
79-
001
Figure 59. Supply Decoupling, REF and Output Referred to Ground
INPUT BIAS CURRENT RETURN PATH
The AD8220 input bias current is extremely small at less than
10 pA. Nonetheless, the input bias current must have a return
path to common. When the source, such as a transformer,
cannot provide a return current path, one should be created
(see Figure 60).
+VS
REF
TRANSFORMER
–VS
AD8220
AC-COUPLED
+VS
REF
C
R
C
–VS
AD8220
1
fHIGH-PASS = 2πRC
0
3579
-0
02
Figure 60. Creating an IBIAS Path
INPUT PROTECTION
All terminals of the AD8220 are protected against ESD.
(ESD protection is guaranteed to 4 kV, human body model.) In
addition, the input structure allows for dc overload conditions
a diode drop above the positive supply and a diode drop below
the negative supply. Voltages beyond a diode drop of the supplies
cause the ESD diodes to conduct and enable current to flow
through the diode. Therefore, an external resistor should be
used in series with each of the inputs to limit current for
voltages above +Vs. In either scenario, the AD8220 safely
handles a continuous 6 mA current at room temperature.
For applications where the AD8220 encounters extreme
overload voltages, as in cardiac defibrillators, external series
resistors and low leakage diode clamps, such as BAV199Ls,
FJH1100s, or SP720s, should be used.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8220BRMZ-RL | 功能描述:IC AMP INST JFET R-R 15MA 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:13 V/µs 增益带宽积:3MHz -3db带宽:- 电流 - 输入偏压:65pA 电压 - 输入偏移:3000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD8220-EVAL | 制造商:AD 制造商全称:Analog Devices 功能描述:JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package |
| AD8220-EVALZ | 制造商:Analog Devices 功能描述:Evaluation Board For JFET Instrumentation Amplifier Evaluation Board 制造商:Analog Devices 功能描述:JFET INSTRUMENTATION AMP EVAL BD - Bulk 制造商:Analog Devices 功能描述:AD8220 Evaluation Board |
| AD8220TRMZ-EP | 功能描述:IC OP AMP JFET RR 8MSOP 制造商:analog devices inc. 系列:- 包装:管件 零件状态:在售 放大器类型:J-FET 电路数:1 输出类型:满摆幅 压摆率:2 V/μs -3db 带宽:1.5MHz 电流 - 电源:750μA 电流 - 输出/通道:15mA 电压 - 电源，单/双（±）:4.5 V ~ 36 V，±2.25 V ~ 18 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-MSOP 标准包装:50 |
| AD8220TRMZ-EP-R7 | 功能描述:IC OP AMP JFET RR 8MSOP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 放大器类型:J-FET 电路数:1 输出类型:满摆幅 压摆率:2 V/μs -3db 带宽:1.5MHz 电流 - 电源:750μA 电压 - 电源，单/双（±）:4.5 V ~ 36 V，±2.25 V ~ 18 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-MSOP 标准包装:1,000 |
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