参数资料
| 型号： | AD8207WBRZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP 65V DIFF BIDIRECT 8SOIC |
| 标准包装： | 1,000 |
| 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 14 of 16
APPLICATIONS INFORMATION
MOTOR CONTROL
3-Phase Motor Control
The AD8207 is ideally suited for monitoring current in 3-phase
motor applications.
The 150 kHz typical bandwidth of the AD8207 allows for
instantaneous current monitoring. Additionally, the typical
low offset drift of 500 nV/°C means that the measurement
error between the two motor phases will be at a minimum
over temperature. The AD8207 rejects PWM input common-
mode voltages in the range of 4 V to +65 V (with a 5 V
supply). Monitoring the current on the motor phase allows
for sampling of the current at any point and allows for
diagnostic information such as a short to GND and battery.
Refer to Figure 34 for a typical phase current measurement
setup with the AD8207.
H-Bridge Motor Control
Another typical application for the AD8207 is as part of
the control loop in H-bridge motor control. In this case, the
shunt resistor is placed in the middle of the H-bridge (see
Figure 33) so that it can accurately measure current in both
directions by using the shunt available at the motor. This is
a better solution than a ground referenced op amp because
ground is not typically a stable reference voltage in this type
of application. The instability of the ground reference causes
inaccuracies in the measurements that could be made with a
simple ground referenced op amp. The AD8207 measures
current in both directions as the H-bridge switches and the
motor changes direction. The output of the AD8207 is config-
ured in an external referenced bidirectional mode (see the
Bidirectional Operation section).
AD8207
+IN
SHUNT
MOTOR
VREF1 +VS OUT
–IN
GND
5V
CONTROLLER
VREF2RANGE
5V
2.5V
0
916
0-
0
20
Figure 33. H-Bridge Motor Control Application
AD8207
BIDIRECTIONAL CURRENT MEASUREMENT
REJECTION OF HIGH PWM COMMON-MODE VOLTAGE (–4V TO +65V)
AMPLIFICATION
HIGH OUTPUT DRIVE
AD8214
INTERFACE
CIRCUIT
V+
IU
IV
IW
V–
OPTIONAL
PART FOR
OVERCURRENT
PROTECTION AND
FAST (DIRECT)
SHUTDOWN OF
POWER STAGE
AD8207
CONTROLLER
5V
M
09
16
0-
01
7
Figure 34. 3-Phase Motor Control
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8207WBRZ-RL | 功能描述:IC AMP 65V DIFF BIDIRECT 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:3 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:70µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:Digi-Reel® 其它名称:MAX4475AUT#TG16DKR |
| 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 |
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