Date: 30/11/2010

MCU picks up analog signals from automotive sensors measuring physical movements

Maxim has released SoC class microcontroller chip with integrated programmable gain amplifiers to pick up both weak as well strong differential analog signals from sensors such as anisotropic magnetoresistive (AMR) sensors. The MAXQ7670A with 12-bit range measures microvolt range. AMR sensors are typically used for contactless sensing of linear or angular displacement in automotive or industrial applications.

The MAX7670A measures 5mm x 5mm in foot print is suggested for automotive applications such as steering, braking, and throttle-position control, as well as industrial control applications such as valve positioning and shaft rotation. The on-chip 16-bit RISC MAXQ core and embedded CAN bus controller allow real-time data processing for smart sensor networks.

The MAXQ7670A features eight single-ended/four differential inputs, followed by a programmable-gain differential amplifier (1x or 16x) and 125ksps ADC with 12-bit resolution. MAXQ7670A monitors supply-rail voltage to respond to power-failure conditions, and integrates a watchdog timer to ensure reliable operation. Its digital interfaces consist of a CAN 2.0B controller, SPI interface, JTAG interface, and seven general-purpose I/Os. A general-purpose timer with capture, compare, and PWM capability is also provided.

The MAXQ7670A integrates 2KB of SRAM for data and 64KB of automotive-grade flash memory. In-system programming is supported for field upgrades from a built-in 8KB utility ROM. The user can prevent unauthorized access to flash memory through a hardware password.

Package: 5mm x 5mm, 40-pin TQFN

Operating temperature range: -40°C to +125°C

Price: Start at US$3.58

Availability: Now