Dynamically programmable analog signal processor uses less power

3 May 2006 Analogue, Mixed Signal, LSI

Anadigm, a supplier of 'dynamically programmable analog signal processors' (dpASP), has released its third-generation lower power and higher performance dpASP, the AN231E04. This device operates with a 3,3 V power supply, and is designed to target analog signal processing in RFID readers, audio, and a broad range of industrial applications.

The AN231E04 is suited for applications that require analog signal conditioning, filtering, gain control, rectification, summing, subtracting, multiplying, etc. It reduces the design time and 'time to revenue' of many applications by reducing the design time and expense of using traditional analog and/or DSP in the analog domain.

A major enhancement and customer-driven feature is the addition of 'offset nulling', reducing typical CMOS op-amp input offset voltages from 4 mV to under 250 μV. This feature is user controlled, so offset nulling can be performed automatically after configuration, or at any future time, allowing for adjustments as a result of environmental changes, such as temperature.

The AN231E04 consists of a 2 X 2 matrix of fully configurable analog blocks, surrounded by programmable interconnect resources and analog input/output cells with active elements. The on-chip clock generator block controls multiple non-overlapping clock domains generated from an external stable clock source, providing the designer optimisation and fine-tuning of CAM (configurable analog module) parameters for a given signal frequency. An internal band-gap reference generator is used to create temperature-compensated reference voltage levels, and the inclusion of an 8 x 256 bit look-up table enables waveform synthesis and several non-linear functions. Configuration data is stored in an on-chip SRAM configuration memory. Additionally, an SPI-like interface is provided for simple serial load of configuration data from a microprocessor or DSP.

Designers can use the 44-pin AN231E04 by programming the chip using AnadigmDesigner2 EDA software. This software allows designers to construct complex analog functions using configurable analog modules (CAMs) as building blocks.

www.anadigm.com

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