ADI采用3轴数字加速度计的ADXL345血压计解决方案

Low operating current

Full power mode: 1 mA

Low power mode: 21.5 μA

AD7147应用:

Cell phones

Personal music and multimedia players

Smart handheld devices

Television, A/V, and remote controls

Gaming consoles

Digital still cameras

图7. AD7147方框图

图8.AD7147 SPI接口应用电路

图9.AD7147 I2C接口应用电路

ADMP421: iMEMS? Microphone Omni Directional Microphone with Bottom Port and Digital Output

The ADMP421 is a low cost, low power, digital output bottom ported omni-directional MEMs microphone. The ADM421 consists of a MEMs microphone element, an output amplifier and a 4th order sigma delta modulator. The digital interface allows for the PDM (Pulse Density Modulated) output of two microphones to be time multiplexed on a single data line using a single clock.

The ADMP421 has a high SNR of 60.5 dBA, and a high sensitivity, of -26 dBFS. The high SNR and sensitivity make the ADMP421 excellent for far field applications. The ADMP421 has a flat frequency response from 100 Hz through 15 kHz. Low current consumption enables long battery life for portable applications. A built in particle filter provides for high reliability.

The ADMP421 will be available in a very thin 3 mm × 4 mm × 1 mm surface mount package. It is reflow solder compatible with no sensitivity degradation.

AD7147主要特性:

Small and thin 3 mm × 4 mm × 1 mm surface mount package

High SNR 60.5 dBA

High Sensitivity -26 dBFS

Flat Frequency Response from 100 to >12 kHz

Low Current Consumption 650 μAmps

High PSRR of 80 dBFS

4th Order Sigma Delta Modulator

Digital PDM output

Compatible with Sn/Pb and Pb-free solder processes

RoHS Compliant

AD7147应用:

Cell Phones

PC Audio

Digital Cameras

图10.AD7147功能方框图

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