MMA2241KEG

The MMA2241KEG is a micro-machined Accelerometer featuring signal conditioning, a 2-pole low pass filter and temperature compensation. Zero-g offset full scale span and filter cut-off are factory set and require no external devices. A full system self-test capability verifies system functionality. The X-axis g-cell is constructed using surface micromachining; and the interface IC is fabricated in a 1.2micron (60%) silicon gate CMOS process. The signal conditioning of the accelerometer channel begins with a capacitance to voltage conversion (C to V) followed by a 2-stage switched capacitor amplifier. This 2-stage amplifier has adjustable offset and gain trimming. The offset and gain of the interface IC can be controlled by the serially accessed EPROM trimming register.