参数资料
| 型号： | AD8207WBRZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP 65V DIFF BIDIRECT 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 零漂移 |
| 电路数： | 1 |
| 转换速率： | 1 V/µs |
| -3db带宽： | 150kHz |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 2.5mA |
| 电压 - 电源，单路/双路(±)： | 3.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°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) |
AD8207
Rev. 0 | Page 15 of 16
SOLENOID CONTROL
High-Side Current Sense with a Low-Side Switch
Other typical applications for the AD8207 include current
monitoring for PWM control of solenoid openings. Typical
applications include hydraulic valve control, diesel injection
control, and actuator control.
In Figure 35, the PWM control switch is ground referenced. An
inductive load (solenoid) is tied to a power supply. A resistive
shunt is placed between the switch and the load (see Figure 35).
An advantage of placing the shunt on the high side is that the
entire current, including the recirculation current, can be
measured because the shunt remains in the loop when the
switch is off. In addition, diagnostics capabilities are enhanced
because shorts to ground can be detected with the shunt on
the high side. In this circuit configuration, when the switch
is closed, the common-mode voltage moves down to near the
negative rail. When the switch is opened, the voltage reversal
across the inductive load causes the common-mode voltage to
be held one diode drop above the battery by the clamp diode.
AD8207
+IN
42V
BATTERY
CLAMP
DIODE
INDUCTIVE
LOAD
SHUNT
SWITCH
VREF1 +VS
5V
OUT
–IN
GND VREF2 RANGE
09
16
0-
01
8
Figure 35. Low-Side Switch
High-Side Current Sense with a High-Side Switch
This configuration minimizes the possibility of unexpected
solenoid activation and excessive corrosion (see Figure 36). In
Figure 36, both the switch and the shunt are on the high side.
When the switch is off, the battery is removed from the load,
which prevents damage from potential shorts to ground, while
still allowing the recirculation current to be measured and
providing for diagnostics. Removing the power supply from the
load for the majority of the time minimizes the corrosive effects
that can be caused by the differential voltage between the load
and ground. When using a high-side switch, the battery voltage
is connected to the load when the switch is closed, causing the
common-mode voltage to increase to the battery voltage. When
the switch is opened, the voltage reversal across the inductive
load causes the common-mode voltage to be held one diode
drop below ground by the clamp diode.
AD8207
+IN
42V
BATTERY
CLAMP
DIODE
INDUCTIVE
LOAD
SHUNT
SWITCH
VREF1 +VS
5V
OUT
–IN
GND VREF2 RANGE
09
16
0-
01
9
Figure 36. High-Side Switch
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8208 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Voltage, Precision Difference Amplifier |
| AD8208WBRMZ | 功能描述:IC AMP DIFF PREC 8MSOP RoHS:是 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 |
| AD8208WBRMZ-R7 | 功能描述:IC AMP DIFF PREC 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: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 |
| AD8208WBRMZ-RL | 功能描述:IC AMP DIFF PREC 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: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 |
| AD8208WBRZ | 功能描述:IC AMP DIFF PREC 8SOIC RoHS:是 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 |
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