CMOS IC acts as analog front end

Tempe, Ariz. — ProTek Analog released a mixed-signal CMOS monolithic device that integrates analog-to-digital converter conversion operations on a single chip.

Flexible, programmable and host-independent, the Sentinel acts as a low-frequency
analog front-end for applications involving lighting, sensor interfaces, feedback controls, instrumentation, medical electronics, computer peripherals and data acquisition systems.

The Sentinel requires a digital controller to operate, but may or may not
need additional memory depending on the application. Unlike competing
devices, the Sentinel is not limited to a particular type of controller.
The digital controller can be a microprocessor, microcontroller, CPLD, FPGA,
discrete logic, or PC.

The Sentinel provides a robust, cost-effective solution for low power A/D
conversion applications, said M.A. Rehman, Protek's chief technology officer. “The Sentinel is the first host-independent analog front-end designed to multiplex multiple sensors and/or sources,” he said.

The device measures both current and voltage outputs, and provides a built-in multiplexer to interface to up to six different sensors at the
same time. This capability eliminates the need for external multiplexers,
as well as signal conversion functions that add cost and complexity to the
user's system.

The Sentinel features low operating voltage and frequency (fosc=2 MHz,
4.5 to 5.5 V), dual 50 mA current source, on-chip voltage regulator, up to six
current outputs (D/A channel), and low power consumption. The device
provides dual 8-bit programmable current sources, as well as a clock
oscillator for timing purposes, voltage reference, preconditioning
amplifier, sample and hold, and a 10-bit A/D converter.

A register file
containing six real registers is used for programming the current sources.
Two additional registers enable trimming of the clock oscillator and the
on-time of current sources.

Available in a SOIC 16-pin package, QFN, or as a die for direct
chip-on-board mounting, the Sentinel and its complete system (digital
controller and memory) can also be delivered as a multichip system in a
package (MSP).

Pricing is $2.50 each in 10,000-piece quantities. Click here for the Sentinel data sheet.

Protek Analog , 1-602-431-8101,

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