参数资料
| 型号： | AD8223ARZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST R-R LP 8SOIC |
| 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： | 0.3 V/µs |
| -3db带宽： | 200kHz |
| 电流 - 输入偏压： | 12nA |
| 电压 - 输入偏移： | 250µV |
| 电流 - 电源： | 650µA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 24 V，±2 V ~ 12 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
AD8223
Rev. 0 | Page 18 of 20
Driving a Cable
All cables have a certain capacitance per unit length, which
varies widely with cable type. The capacitive load from the
cable may cause peaking in the output response of the AD8223.
To reduce the peaking, use a resistor between the AD8223 and
the cable. Because cable capacitance and desired output response
vary widely, this resistor is best determined empirically. A good
starting point is 75 Ω.
The AD8232 operates at a low enough frequency that transmission
line effects are rarely an issue; therefore, the resistor need not
match the characteristic impedance of the cable.
AD8223
(DIFF OUT)
AD8223
(SINGLE OUT)
06
92
5-
04
7
Figure 40. Driving a Cable
A SINGLE-SUPPLY DATA ACQUISITION SYSTEM
Interfacing bipolar signals to single-supply analog-to-digital
converters (ADCs) presents a challenge. The bipolar signal
must be mapped into the input range of the ADC. Figure 41
shows how this translation can be achieved.
±10mV
5V
AD8223
REF
5V
AD7776
5V
+
–
AIN
REFOUT
REFIN
0.1F
RG
1.02k
0
69
25
-04
8
Figure 41. A Single-Supply Data Acquisition System
The bridge circuit is excited by a +5 V supply. The full-scale output
voltage from the bridge (±10 mV), therefore, has a common-
mode level of 2.5 V. The AD8223 removes the common-mode
component and amplifies the input signal by a factor of 100
(RG = 1.02 kΩ). This results in an output signal of ±1 V. To
prevent this signal from running into the AD8223 ground rail, the
voltage on the REF pin must be raised to at least 1 V. In this
example, the 2 V reference voltage from the AD7776 ADC is
used to bias the AD8223 output voltage to 2 V ± 1 V, which
corresponds to the input range of the ADC.
AMPLIFYING SIGNALS WITH LOW COMMON-
MODE VOLTAGE
Because the common-mode input range of the AD8223 extends
0.15 V below ground, it is possible to measure small differential
signals that have low, or no, common-mode components. Figure 42
shows a thermocouple application in which one side of the J-type
thermocouple is grounded.
2V
5V
AD8223
REF
0.1F
VOUT
RG
1.02k
+
–
J-TYPE
THERMOCOUPLE
06
92
5-
04
9
Figure 42. Amplifying Bipolar Signals with Low Common-Mode Voltage
Over a temperature range of 200°C to +200°C, the J-type
thermocouple delivers a voltage ranging from 7.890 mV
to +10.777 mV. A programmed gain on the AD8223 of 100
(RG = 845) and a voltage on the AD8223 REF pin of 2 V results
in the AD8223 output voltage ranging from 1.110 V to 3.077 V
relative to ground.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8223ARZ-RL | 功能描述:IC AMP INST R-R LP 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:带卷 (TR) |
| AD8223BR | 功能描述:IC AMP INST R-R LP 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:管件 |
| AD8223BRM | 功能描述:IC AMP INST R-R LP 8MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8223BRM-R7 | 功能描述:IC AMP INST R-R LP 8MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| AD8223BRM-RL | 功能描述:IC AMP INST R-R LP 8MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:2pA 电压 - 输入偏移:1000µV 电流 - 电源:85µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):1.8 V ~ 6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:剪切带 (CT) 产品目录页面:680 (CN2011-ZH PDF) 其它名称:MCP6L04T-E/SLCT |
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