Integrated circuit device for digital-to-analog signal converting

An integrated circuit and analog-to-mode conversion technology, applied in the field of multi-channel DAC, can solve the problems of mixed-signal device inconvenience, increase manufacturing time and cost, etc., and achieve the effect of shortening interface communication time and reducing command structure

Active Publication Date: 2014-07-16
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Having to program up to eight different address masks into an otherwise identical mixed-signal device increases manufacturing time and cost, and results in as many as eight different parts having to be stocked and shipped
Also, having mixed-signal devices with non-field programmable addresses can become inconvenient in some applications

Method used

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  • Integrated circuit device for digital-to-analog signal converting
  • Integrated circuit device for digital-to-analog signal converting
  • Integrated circuit device for digital-to-analog signal converting

Examples

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Embodiment Construction

[0031] Referring now to the drawings, details of specific example embodiments are schematically illustrated. In the drawings the same elements will be represented by the same reference numerals, and similar elements will be represented by the same reference numerals with different lowercase letter suffixes.

[0032] see figure 1 , depicts a schematic block diagram of a device with a single digital-to-analog conversion (DAC) capability and non-volatile memory according to a specific example embodiment of this disclosure. The device, generally indicated by reference numeral 100, may include serial interface and address logic 102, input register 104, DAC register 106, digital-to-analog converter (DAC) 108, power down control 110, analog amplifier 112, nonvolatile volatile memory 114, charge pump 116, and power-on-reset (POR) circuit 118.

[0033] Non-volatile memory 114 may be, but is not limited to, electrically erasable and programmable read-only memory (EEPROM), flash memory...

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Abstract

A mixed signal integrated circuit device, e.g., digital-to-analog converter (DAC), has a serial interface communication protocol that accesses volatile and / or non-volatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered-up. However, unlike conventional DACs, DACs with non-volatile memory may need special interface communication protocols for effective operation of the DAC and communications between a system master controller unit (MCU). Interface communications protocols that do not violate standard serial bus communications protocols are provided for communicating between the volatile and non-volatile memories of the DAC so that the MCU may access the DAC's memories (non-volatile and / or volatile memories). The mixed signal integrated circuit device has a user programmable address.

Description

technical field [0001] The present invention relates to digital-to-analog converters (DACs) that store configuration and address information, as well as input data, in non-volatile memory; and more particularly to having non-volatile memory and using , I 2 C, SPI, USB, SCIO, UNI / O, etc.) serial communication protocol multi-channel DAC. Background technique [0002] Current art DAC devices store configuration information and input data in volatile memory. When operating power is removed from the DAC device and associated volatile memory, configuration information and input data stored in the volatile memory are lost. For example, a DAC device can be used to output a programmable analog voltage. Programming bits (eg, digital representations of analog voltages) are stored in volatile DAC registers, whereby their contents are released when power is removed. After initial power-up of the DAC device, the DAC registers are cleared or their contents are not predictable until the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/66
CPCH03M1/66
Inventor 托马斯·尤博克·李扬·约纳菲利普·吉梅尔蒂姆·舍曼乔纳森·杰克逊约翰·奥斯丁
Owner MICROCHIP TECH INC
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