说明
PAC1921是一种专用的功率监测设备,具有可配置的模拟输出,可以显示功率、电流或电压。所有信息也在2线/I上提供2.兼容C的接口。PAC1921是为功率测量和诊断系统设计的,在执行高速功率管理时不能考虑延迟。该设备的电流读数准确率为0.4%,功率读数准确率则为1%。
测量值在大寄存器中累积,允许500微秒到2.9秒的积分周期。测量值取平均值并显示在模拟输出上,全量程范围为3V、2V、1.5V或1.0V。
PAC1921具有用于测量积分周期的主机控制的READ/INT引脚。此引脚可用于同步多个设备之间的多条总线的读数。数据采样和输出属性,如内部ADC分辨率(11位或14位)和采样率,是可配置的。该设备可以监测0-32V的电源轨,整个感应电阻器的满刻度能力为100mV。此设备不需要输入筛选器。
特性
- Configurable Measurement Type Output: Power, Current or Bus Voltage
- All output values also available over SMBus>
- Provides integrated average power measurement
- Power measurements provided to micro-controller with ADC inputs
- Output voltage proportional to selected measurement>
- 100 mV full-scale current sense voltage range
- Second-order delta-sigma ADC with 11-bit or 14-bit resolution
- Selectable current binary gain ranges: 1x through 128x>
- 1% Power Measurement Accuracy
- Auto-Zero Offset>
- Auto Sleep State>- Automatically shifts to low-power state (3.5 μA)
- VDD = 3.3V nominal (operational range 3.0V to 5.5V)>
- Bus Range 0V to 32V>
- No Input Filters Required>
- 10-pin 3 mm x 3 mm VDFN RoHS Compliant Package
参数
类型 | 描述 |
Description | Current/DC Power Sensor |
Vsense min FSR (mV) | 0 |
Vsense max FSR (mV) | 100 |
Vsense accuracy (% FSR, max) | 0.4 |
Vbus Range min (V) | 0 |
Vbus Range max (V) | 32 |
Vbus accuracy (% FSR, max) | 0.4 |
Sampling Interval min (msec) | 0.9 |
Sampling Interval max (msec) | 2900 |
Remote Temperature Monitors | 0 |
# Ambient Temperature Monitors | 0 |
Temperature Accuracy Max (°) | 0 |
Alert/Therm | 0 |
Accumulator? | No |
Interface | SMBus/I2C |
Address Select | 16 |
# Current Channel | 1 |
ADC Resolution (bit) | 14 |



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