Single chip successive approximation analog-to-digital converter with trimmable and controllable digital-to-analog converter
First Claim
1. A single chip integrated successive approximation analog-to-digital converter, including:
- test mode terminal means for receiving test mode control signals and successive approximation mode control signals;
test data terminal means for receiving digital test data signals;
a trimmable digital-to-analog converter (DAC) having input terminals for receiving digital signals and for converting the digital signals to analog signals of corresponding values; and
successive approximation register means coupled to the test mode terminal means and test data terminal means for operating in a test mode and applying the test data signals to the input terminals of the DAC in response to the test mode control signals, and for operating in a successive approximation register mode in response to the successive approximation mode control signals.
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Accused Products
Abstract
A single chip monolithic integrated successive approximation analog-to-digital converter includes a test mode terminal for receiving shift register test mode control signals and successive approximation mode control signals. Digital test data signals are applied to a test data terminal. A trimmable digital-to-analog converter (DAC) is connected to receive digital signals and converts these signals to analog signals of corresponding values. A successive approximation and shift register is coupled to the test mode terminal and the test data terminal. During post-fabrication processing, the successive approximation and shift register operates in a shift register test mode in response to the test mode control signals. Test signals of a known value are serially received and applied in parallel to the DAC. The DAC can then be trimmed to required specifications. The successive approximation and shift register operates in a successive approximation mode in response to successive approximation mode control signals.
71 Citations
5 Claims
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1. A single chip integrated successive approximation analog-to-digital converter, including:
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test mode terminal means for receiving test mode control signals and successive approximation mode control signals; test data terminal means for receiving digital test data signals; a trimmable digital-to-analog converter (DAC) having input terminals for receiving digital signals and for converting the digital signals to analog signals of corresponding values; and successive approximation register means coupled to the test mode terminal means and test data terminal means for operating in a test mode and applying the test data signals to the input terminals of the DAC in response to the test mode control signals, and for operating in a successive approximation register mode in response to the successive approximation mode control signals. - View Dependent Claims (2, 3, 4, 5)
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Specification