GC2011A-PB

Overview

The GC2011A is a 3.3V digital filter chip fabricated in 0.5 micron CMOS technology, serving as an improved replacement for the GC2011. It features 32 multiply-add filter cells capable of operating at input rates up to 106 MSPS. The device supports dual inputs for complex or double-rate processing and includes snapshot memory for adaptive filtering updates. Key specifications include 12-bit input data, 14-bit coefficients, and configurable outputs ranging from 8 to 24 bits with 32-bit internal precision. It offers decimation by 2 (128 taps) and 4 (256 taps), Hilbert transforms, and real-to-complex conversion modes.

Feature Summary

• Dual-path architecture supporting complex data processing and independent signal handling
• Configurable FIR transversal filters with support for even and odd symmetry linear phase operations
• Integrated snapshot memory for capturing input/output blocks to facilitate adaptive coefficient updates
• Enhanced control interface compatible with standard memory interfaces and original GC2011 strobes

Applications

• Digital down-conversion and up-conversion systems requiring real-to-complex or complex-to-real format conversion
• Adaptive filtering applications utilizing snapshot memory for real-time coefficient adjustment
• High-speed decimation and interpolation stages in communication receivers and transmitters
• Complex coefficient filtering implementations using paired chips for I/Q path separation

Procurement Notes

Verify that the design environment strictly utilizes a 3.3V supply, as the GC2011A lacks 5V tolerance and may sustain damage if input voltages exceed Vcc + 0.5V. Confirm that existing software does not inadvertently activate new control registers at address 12, which are unused in the legacy GC2011 but active in this revision. Ensure clock loss detection settings align with system power management requirements.

Selection Notes

Select the GC2011A when replacing a GC2011 in a 3.3V system to benefit from lower power consumption and enhanced timing specifications. Choose this component if the application requires specific offset binary conversion capabilities or clock loss detection features not present in the predecessor. Consider the available packaging options, including 160-pin QFP and PBGA, based on board space and thermal constraints.

Part Context

The GC2011A is part of the Graychip digital filter family, now distributed by Texas Instruments. It maintains functional and footprint compatibility with the GC2011 while introducing improvements such as offset binary conversion and power-down modes. The device is designed for high-performance digital signal processing tasks requiring flexible filter configurations and precise timing control.

Replacement Considerations

The GC2011A is a direct functional and footprint-compatible replacement for the GC2011 in 3.3V designs. Designs originally using the GC2011 at 5V require voltage level translators and a separate 3.3V supply to accommodate the GC2011A's non-tolerant inputs.