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CAT521PI-TE10 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT521PI-TE10 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
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1 / 10 page  1 Doc. No. 2003, Rev. F © 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 2 3 4 5 6 7 14 13 12 11 8 10 9 VDD CLK RDY/BSY CS DI DO PROG VREFH NC VOUT NC NC VREFL GND 1 2 3 4 5 6 7 14 13 12 11 8 10 9 VDD CLK RDY/BSY CS DI DO PROG VREFH NC VOUT NC NC VREFL GND CAT521 Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES s 8-bit DPP configured as a programmable voltage source in DAC-like applications s Buffered wiper output s Non-volatile NVRAM memory wiper storage s Output voltage range includes both supply rails 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 CAT521 is a 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 programmable DPP has an output voltage range which includes both supply rails. The wiper is buffered by a rail to rail op amp. The wiper setting, stored in non-volatile NVRAM memory, is not lost when the device is powered down and is automatically reinstated when power is returned. The wiper can be dithered to test new output values without effecting the stored FUNCTIONAL DIAGRAM PIN CONFIGURATION settings and stored settings can be read back without disturbing the DPP’s output. The CAT521 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 CAT521 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 CAT521 is available in 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) CAT521 CAT521 CAT521 ALO GEN FR TM LEAD FREE RDY/BSY PROG PROGRAM CONTROL DI CS CLK SERIAL DATA OUTPUT REGISTER GND V DD 14 7 5 2 4 12 OUT V 6 DO 8 9 31 + SERIAL CONTROL NVRAM WIPER CONTROL REGISTER AND V REFH VREFL |
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