Digital potentiometer ICs reduce power and are more cost-effective
30 July 2003Analogue, Mixed Signal, LSI
Access Control & Identity Management
Products & Solutions
Catalyst Semiconductor's new quad and dual digitally programmable potentiometer (DPP) integrated circuits are designed to replace mechanical potentiometers. The quad CAT5241 and dual CAT5221 digital potentiometer ICs have 64 wiper positions. The linear-taper, nonvolatile DPP ICs are controlled over a 400 kHz, 2-wire interface.
The CAT5241 and CAT5221 give engineers a low cost, low power alternative to other industry parts. Standby power is 5 mW maximum at 5 V, ideally suited for battery powered equipment. The devices operate from a single power supply voltage that can range from 2,5 to 6,0 V. Maximum wiper resistance is a low 150 Ω at 5 V operation, and maximum wiper resistance is 300 Ω at 3 V operation.
Target applications for digitally programmable potentiometer ICs include fibre-optic transceiver modules, RF amplifier bias and protection circuits, digital and film cameras, LCD display brightness and contrast control, transducer calibration and programmable power supplies. Multiple pots per package, mean DPP solutions are lower cost and easier to mount on PCBs than mechanical potentiometers.
Digital potentiometers allow traditional analog functions to be adjusted, trimmed or controlled digitally. This makes them a more efficient means of automating the control, calibration and manufacturing of electronic systems than mechanical potentiometers. They also have the advantage of being much more tolerant of hazardous system environments.
The CAT5241 and CAT5221, quad and dual DPP ICs, have 64 tap positions each or 6-bit resolution. Tap positions can be stored in embedded EEPROM and automatically recalled upon power up. Each potentiometer is controlled from an independent 6-bit digital control register and its associated four independent EEPROM registers. Nonvolatile registers and each wiper control register can be written and read directly. Tap settings stored in the nonvolatile registers can be transferred to the wiper control registers independently or globally for faster system control operations. Four device address pins allow as many as 16 devices or a maximum of 64 pots to share a common 2-wire bus for maximum system efficiency.
The 64-tap quad CAT5241 and dual CAT5221 are available in 20-lead SOIC packages. Four resistance options, 2,5, 10, 50 and 100 kΩ, are offered.
Powering business resilience and field operations
Infrastructure Products & Solutions
[Sponsored] The Anker 757 Portable Power Station emerges as a strategic asset for businesses looking to overcome power instability and the demand for operational efficiency in remote and field-based environments.
Read more...Eight MP dome for harsh environments Axis Communications SA
Surveillance Products & Solutions
Axis Communications announced a marine-grade stainless steel camera that offers performance in harsh environments. Enclosed in an electropolished stainless steel casing, it can withstand the corrosive effects of seawater and cleaning chemicals.
Read more...Save energy with Paxton’s Net2 Access Control Paxton
Power Management Products & Solutions
Paxton offers access control systems that can help save building energy by utilising smart features. This not only has a positive environmental impact but, importantly, helps save businesses money.
Read more...Protecting our most vulnerable NEC XON
Access Control & Identity Management Products & Solutions
In a nation grappling with the distressing rise in child kidnappings, the need for innovative solutions to protect our infants has never been more critical. South Africa finds itself in the throes of a child abduction pandemic.
Read more...Access & identity expectations for 2024 Technews Publishing IDEMIA ZKTeco Gallagher Salto Systems Africa Regal Distributors SA Reditron
Editor's Choice Access Control & Identity Management Information Security AI & Data Analytics
What does 2024 have in store for the access and identity industry? SMART Security Solutions asked several industry players for their brief thoughts on what they expect this year.
Read more...International access manufacturer sets up shop in SA Technews Publishing
Access Control & Identity Management News & Events Products & Solutions
The South African security market can always use some good news, and this year, STid has obliged by formally entering the South African market, setting up its main office in the Boomgate Experience Centre in Roodepoort, Johannesburg.
Read more...Access and identity in 2024 Technews Publishing Gallagher HID Global IDEMIA Ideco Biometrics Enkulu Technologies neaMetrics
Editor's Choice Access Control & Identity Management Integrated Solutions SMART Security Solutions hosted a round table discussion with various players in the access and identity market, to find out what they experienced in the last year, as well as their expectations for 2024.
Read more...The promise of mobile credentials Technews Publishing Suprema neaMetrics HID Global
Editor's Choice Access Control & Identity Management IoT & Automation SMART Security Solutions examines the advantages and disadvantages of mobile credentials in a market dominated by cards and fobs, in which biometrics is viewed as a secure alternative.
Read more...Prepare for cyber-physical attacks Gallagher
Information Security Access Control & Identity Management
As the security landscape continues to evolve, organisations must fortify their security solutions to embrace the changing needs of the security and technology industries. Nowhere is this more present than with regard to cybersecurity.
Read more...Unleash the full potential of AI at the edge Suprema
AI & Data Analytics Access Control & Identity Management
Efficient AI algorithms, when embedded in edge access control devices, enable companies to optimise their use of AI and edge processing to deliver reliable and fast authentication.
printer friendly version