Austin, Tex. Freescale Semiconductor has expanded its micro-electromechanical systems (MEMS)-based sensor line with a 3-axis digital-output accelerometer that is 77 percent smaller than previous industry offerings. Plus, it eliminates the need for an A/D converter and external memory. The company says the MMA7450L is the industry's thinnest available in a 0.8-mm thin plastic land grid array (LGA) package and targets feature-rich portable devices.
Designed to simplify integration of microprocessors and microcontrollers (MCUs), the MMA7450L enables an array of motion-based functions such as tilt scrolling, gaming control, tap to mute and freefall hard disk drive protection for handheld terminals that implement user interfaces based on hand movements and appliances that require movement, acceleration or inclination sensing.
The MMA7450L can communicate on both I2C and SPI interface buses. The digital output streamlines communication with the MCU or microprocessor. It eliminates the need for a dedicated analog-to-digital converter and enables the sensor to share interfaces with other devices, which saves additional space in small-form-factor systems, said Freescale. In addition, portable device manufacturers can connect the MMA7450L directly to a wireless platform such as Freescale's i.MX architecture, or a highly integrated 8-bit MCU to design accelerometers into cell phones and portable media devices.
In addition to providing an on-board digital output, the MMA7450L embeds features such as threshold and pulse or click-detect for quick motion detection and offset calibration, eliminating the need for external memory. The MMA7450L includes a g-select feature with three sensitivities of 2g, 4g, or 8g.
Housed in a low-profile 14-pin 3 x 5 x 0.8-mm LGA package, the MMA7450L is a suitable solution for portable consumer electronics that require a fast response time, high sensitivity, low-current consumption, low-voltage operation and a standby mode in a small package. It offers high sensitivity of 64 LSB/g at 2 g and 64 LSB/g at 8 g in 10-bit mode. Current consumption is rated at 400 microamps with standby mode at 5 microamps. The device can survive shocks up to 10,000 g.
Pricing: Suggested list price per unit in quantities of 10,000 is $2.66. The KIT3468MMA7450LE evaluation board is available now for a suggested list price of $35. The RD3152MMA7260Q reference board is also available now for a suggested list price of $99.
Availability: Sample quantities are available now with general availability expected in third quarter 2007.
Product information: MMA7450L
Freescale Semiconductor, Inc., 1-800-521-6274, www.freescale.com