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CAT524 Dataheets PDF



Part Number CAT524
Manufacturers Catalyst Semiconductor
Logo Catalyst Semiconductor
Description Configured Digitally Programmable Potentiometer (DPP): Programmable Voltage Applications
Datasheet CAT524 DatasheetCAT524 Datasheet (PDF)

CAT524 Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES s Four 8-bit DPPs configured as programmable APPLICATIONS s Automated product calibration s Remote control adjustment of equipment s Offset, gain and zero adjustments in voltage sources in DAC-like applications s Common reference inputs s Buffered wiper outputs s Non-volatile NVRAM memory wiper storage s Output voltage range includes both supply rails s 4 independently addressable buffered.

  CAT524   CAT524


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CAT524 Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES s Four 8-bit DPPs configured as programmable APPLICATIONS s Automated product calibration s Remote control adjustment of equipment s Offset, gain and zero adjustments in voltage sources in DAC-like applications s Common reference inputs s Buffered wiper outputs s Non-volatile NVRAM memory wiper storage s Output voltage range includes both supply rails s 4 independently addressable buffered self-calibrating and adaptive control systems s Tamper-proof calibrations s DAC (with memory) substitute output wipers s 1 LSB accuracy, high resolution s Serial µP interface s Single supply operation: 2.7V-5.5V s Setting read-back without effecting outputs DESCRIPTION The CAT524 is a quad, 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 four independently programmable DPPs have an output range which includes both supply rails. The wipers are buffered by rail to rail op amps. 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 dithered to test new output values without effecting FUNCTIONAL DIAGRAM RDY/BSY V DD 1 V H REF 14 3 the stored settings, and stored settings can be read back without disturbing the DPP’s output. The CAT524 is controlled with a simple 3 wire 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 Tri-Stated CAT524 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 CAT524 is available in the 0 to 70° C commercial and –40° C to 85° C industrial operating temperature ranges. Both 14-pin plastic DIP and SOIC packages are offered. PIN CONFIGURATION DIP Package (P) SOIC Package (J) VDD CLK RDY/BSY CS DI DO PROG 1 2 3 14 13 VREFH VOUT1 VOUT 2 VOUT 3 VOUT 4 VREF L GND PROG 7 PROGRAM CONTROL + – 13 V 1 OUT VDD CLK RDY/BSY CS DI DO PROG 1 2 3 14 13 VREFH VOUT1 VOUT2 VOUT3 VOUT 4 VREF L GND DI 5 + – 12 VOUT2 CLK 2 SERIAL CONTROL NVRAM + 11 CS 4 – V 3 OUT 12 CAT 4 11 524 5 10 6 9 7 8 12 4 CAT 11 524 5 10 6 9 7 8 + – 10 VOUT4 SERIAL DATA OUTPUT REGISTER 6 DO CAT524 8 GND 9 V L REF © 2001 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 Doc. No. 25076-00 4/01 M-1 CAT524 ABSOLUTE MAXIMUM RATINGS* Supply Voltage VDD to GND ...................................... –0.5V to +7V Inputs CLK to GND ............................ –0.5V to VDD +0.5V CS to GND .............................. –0.5V to VDD +0.5V DI to GND ............................... –0.5V to VDD +0.5V PROG to GND ........................ –0.5V to VDD +0.5V VREFH to GND ........................ –0.5V to VDD +0.5V VREFL to GND ......................... –0.5V to VDD +0.5V Outputs D0 to GND ............................... –0.5V to VDD +0.5V VOUT 1– 4 to GND ................... –0.5V to VDD +0.5V Operating Ambient Temperature Commercial (‘C’ or Blank suffix) ...... 0°C to +70°C Industrial (‘I’ suffix) ...................... – 40°C to +85°C RELIABILITY CHARACTERISTICS Symbol VZAP(1) ILTH(1)(2) Junction Temperature ..................................... +150°C Storage Temperature ....................... –65°C to +150°C Lead Soldering (10 sec max) .......................... +300°C * Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Absolute Maximum Ratings are limited values applied individually while other parameters are within specified operating conditions, and functional operation at any of these conditions is NOT implied. Device performance and reliability may be impaired by exposure to absolute rating conditions for extended periods of time. Parameter ESD Susceptibility Latch-Up Min 2000 100 Max Units Volts mA Test Method MIL-STD-883, Test Method 3015 JEDEC Standard 17 NOTES: 1. This parameter is tested initially and after a design or process change that affects the parameter. 2. Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V. DC ELECTRICAL CHARACTERISTICS: VDD = +2.7 to +5.5V, VREFH = VDD, VREFL = 0V, unless otherwise specified Symbol Accuracy INL Integral Linearity Error ILOAD = 10 µA ILOAD = 10 µA ILOAD = 40 µA ILOAD = 40 µA ILOAD = 10 µA ILOAD = 10 µA ILOAD = 40 µA ILOAD = 40 µA TR = C TR = I TR = C TR = I TR = C TR.


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