Product category:
Analogue and Mixed Signal ICs
News Release from: Intersil | Subject: ISL90460/61/62 family
Edited by the Electronicstalk Editorial
Team on 30 September 2005
Digital pots offer compact low-cost
option
A new family of digitally controlled potentiometers are billed as the smallest volatile 32-tap DCPs in the industry.
Intersil has introduced a family of volatile, digitally controlled potentiometers (DCPs) The ISL90460, ISL90461 and ISL90462 are the smallest volatile 32-tap DCPs in the industry
This article was originally published on Electronicstalk on 8 Oct 2008 at 8.00am (UK)
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The family is designed to address current market needs for high-volume, space-constrained applications that require ultra-low power consumption, such as LCD contrast and backlight brightness control in cellphones, PDAs and GPS receivers.
Other applications for the DCPs include industrial automotive control, parameter and bias adjustments, and laser diode driver biasing.
With options ranging from a 100kohm SOT-23 package down to the smallest 10kohm SC-70 package, the family of DCPs features three potentiometer configurations, 32-tap positions, and a two-pin up/down (U/D) interface.
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Along with low power dissipation and a supply voltage range of 2.7 to 5.5V, the ISL90460/61/62 family is available in three resistance options, in two different packages, providing 18 options in total.
The ISL90460/61/62 are digitally adjustable, electronic potentiometers that eliminate the stability issues caused by vibration or shock when using mechanical potentiometers.
Because the parts employ a volatile memory to control the DCP wiper setting, they are significantly more cost-effective than devices using nonvolatile EEPROM.
Consequently, the DCPs are very attractive as replacements for mechanical potentiometers.
Intersil's ISL90460/61/62 are low-noise, low-power DCPs used for adjustment, trimming, and calibration applications in industrial, medical, automotive, and consumer markets.
The DCPs employ a popular two-pin U/D interface to control wiper position.
The devices offer three configurations: a variable resistor with one end grounded (ISL90460), a floating variable resistor (ISL90461), and a potentiometer with one end terminal grounded (ISL90462).
The potentiometer is implemented by a resistor array with 31 elements and a wiper switching network.
Between each element and at either end are tap points accessible via the wiper terminal.
Target applications for the DCPs include LCD contrast control, parameter and bias adjustments, industrial and automotive control, transducer adjustment of pressure, temperature, position, chemical and optical sensors, laser diode driver biasing, gain control and offset adjustment.
The ISL90460 is available now in a 5-pin SOT-23 or SC-70 lead-free package, and the ISL90461 and ISL90462 are available now in 6-pin SOT-23 or SC-70 lead-free packages.
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