8通道, I2C , 12位SAR ADC ,内置温度传感器 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
Product Details
The AD7291 is a 12-bit, low power, 8-channel, successive approximation analog-to-digital converter ADC with an internal temperature sensor.
The part operates from a single 3.3 V power supply and features an I2C-compatible interface. The part contains a 9-channel multiplexer and a track-and-hold amplifier than can handle frequencies up to 30 MHz. The device has an on-chip 2.5 V reference that can be disabled to allow the use of an external reference.
The AD7291 provides a 2-wire serial interface compatible with I2C interfaces. The I2C interface supports standard and fast I2C interface modes. The AD7291 normally remains in a partial power-down state while not converting and powers up for conversions. The conversion process can be controlled by a command mode where conversions occur across I2C write operations or an autocycle mode selected through software control.
The AD7291 includes a high accuracy band gap temperature sensor, which is monitored and digitized by the 12-bit ADC to give a resolution of 0.25°C.
The AD7291 offers a programmable sequencer, which enables the selection of a preprogrammable sequence of channels for conversion.
On-chip limit registers can be programmed with high and low limits for the conversion results; an out-of-range indicator output ALERT becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt.
**Product Highlights**
1. Ideally suited to monitoring system variables in a variety of systems including telecommunications, process control, and industrial control.
2. I2C-compatible serial interface. Standard and fast modes.
3. Automatic partial power-down while not converting to maximize power efficiency.
4. Channel sequencer operation.
5. Integrated temperature sensor with 0.25°C resolution.
6. Out of range indicator that can be software disabled or enabled.
### Features and Benefits
**AD7291-EP supports defense and aerospace applications AQEC
standard通道数 9
位数 12
耗散功率 12.6 mW
采样率 22.22 ksps
分辨率Bits 12.0
输入电容 34.0 pF
模数转换数ADC 1
输入数 8
工作温度Max 125 ℃
工作温度Min -40 ℃
耗散功率Max 12.6 mW
输入通道数 8
输入电压 2.5 V
安装方式 Surface Mount
引脚数 20
封装 LFCSP-20
封装 LFCSP-20
工作温度 -40℃ ~ 125℃
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
军工级 No
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
AD7291BCPZ-RL7 ADI 亚德诺 | 当前型号 | 当前型号 |
AD7291BCPZ 亚德诺 | 类似代替 | AD7291BCPZ-RL7和AD7291BCPZ的区别 |