Product category:
Resistors
News Release from: BI Technologies SMT | Subject: BCN31L
Edited by the Electronicstalk Editorial
Team on 24 January 2005
Ladders turn to data conversion
Digital to analogue (DAC) and analogue to digital (ADC) signal conversion are the main applications for the BCN31L 8bit, R/2R ladder networks from TT Electronics BI Technologies.
Digital to analogue (DAC) and analogue to digital (ADC) signal conversion are the main applications for the BCN31L 8bit, R/2R ladder networks from TT Electronics BI Technologies Packaged in a 2512 ten-terminal chip, the networks significantly reduce the total cost of ownership compared with using discrete resistors
This article was originally published on Electronicstalk on 3 Nov 2003 at 8.00am (UK)
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Ladder networks save space and money
The BCN31L is billed as the worlds first range of thick-film, 2512 leadless chip, R2R, 8bit ladder networks in ten-terminal surface mount packages.
Ladder networks are cost-effective convertors
A series of 8 and 10bit R2R resistor ladder networks targets automotive, industrial, building monitoring and process automation applications.
Savings in board space, placement costs, reduced inventory and better utilisation of pick and place equipment are also areas of cost reduction.
R/2R ladder networks provide a very inexpensive method of DAC and ADC, the term "ladder" refering to the ladder-like topology of the network, which comprises resistors of only two values, R and 2R.
Thick-film monolithic R/2R networks are intrinsically superior to discrete R/2R solutions due to the tight ratio tolerances and tight TCR tracking over the entire operating temperature range that can be achieved with resistors printed on the same substrate.
Resistance values are from 1kohm to100kohm with a tolerance of +/-2%.
Power rating at 25C is 25mW per resistor and 400mW per package and the temperature coefficient of resistance is +/-100ppm/C.
Maximum operating voltage is 50V DC and the operating temperature range -40 to +125C.
Ladder network accuracy is 8bit +/-0.5LSB.
Available with convex terminations and square edges, they are manufactured in the ISO9001/TS16949-approved plant in Glenrothes, Scotland, and are supplied in embossed tape and reeled in quantities of 4000 pieces.
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