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CAT522 Folha de dados(PDF) 1 Page - Catalyst Semiconductor |
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CAT522 Folha de dados(HTML) 1 Page - Catalyst Semiconductor |
1 / 11 page 1 1 2 3 4 5 6 7 14 13 12 11 8 10 9 VDD CLK RDY/BSY CS DI DO PROG VREFH1 VREFH2 VOUT1 VOUT2 VREFL2 VREFL1 GND 1 2 3 4 5 6 7 14 13 12 11 8 10 9 VDD CLK RDY/BSY CS DI DO PROG VREFH1 VREFH2 VOUT1 VOUT2 VREFL2 VREFL1 GND CAT522 Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES s Two 8-bit DPPs configured as programmable voltage sources in DAC-like applications s Independent reference inputs s Non-volatile NVRAM memory wiper storage s Output voltage range includes both supply rails s 2 independently addressable buffered output wipers s 1 LSB accuracy, high resolution s Serial Microwire-like interface s Single supply operation: 2.7V - 5.5V s Setting read-back without effecting outputs APPLICATIONS s Automated product calibration. s Remote control adjustment of equipment s Offset, gain and zero adjustments in self- calibrating and adaptive control systems. s Tamper-proof calibrations. s DAC (with memory) substitute. DESCRIPTION The CAT522 is a dual, 8-bit digitally-programmable potentiometer (DPP™) configured for programmable voltage and DAC-like applications. Intended for final calibration of products such as camcorders, fax machines and cellular telephones on automated high volume production lines, it is also well suited for self-calibrating systems and for applications where equipment which requires periodic adjustment is either difficult to access or in a hazardous environment. The CAT522 offers two independently programmable DPPs each having its own reference inputs and each capable of rail to rail output swing. The wipers are buffered by rail to rail opamps. Wiper settings, stored in non-volatile NVRAM memory, are not lost when the device is powered down and are automatically reinstated when power is returned. Each wiper can be FUNCTIONAL DIAGRAM PIN CONFIGURATION dithered to test new output values without effecting the stored settings and stored settings can be read back without disturbing the DPP's output. The CAT522 is controlled with a simple 3-wire, microwire- like serial interface. A Chip Select pin allows several devices to share a common serial interface. Communication back to the host controller is via a single serial data line thanks to the CAT522 Tri-Stated Data Output pin. A RDY/ BSY output working in concert with an internal low voltage detector signals proper operation of the non-volatile NVRAM memory Erase/Write cycle. The CAT522 is available in the 0 °C to 70°C commercial and -40 °C to 85°C industrial operating temperature ranges. Both 14-pin plastic DIP and surface mount packages are available. DIP Package (P, L) SOIC Package (J, W) CAT522 © 2004 by Catalyst Semiconductor, Inc. Doc. No. 2004, Rev. E Characteristics subject to change without notice CAT522 CAT522 ALO GEN FR TM LEAD FREE RDY/BSY PROG PROGRAM CONTROL DI CS CLK SERIAL CONTROL SERIAL DATA OUTPUT REGISTER GND V DD 14 7 5 2 4 V 13 12 OUT1 OUT2 V 6 DO 8 9 31 + + 24k Ω 24K Ω WIPER CONTROL REGISTERS AND NVRAM 11 10 VREFH1 VREFH2 V REFL1 V REFL2 |
Nº de peça semelhante - CAT522_04 |
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Descrição semelhante - CAT522_04 |
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