GENERAL DESCRIPTION

ALD1108E/ALD1110E are monolithic quad/dual EPADs (Electrically Programmable Analog Device) that utilize CMOS MOSFET with electrically programmable threshold voltage. For a given input voltage,changing the threshold turn-on voltage of a MOSFET device precisely changes its drain on-current, resulting in an on-resistance characteristic that can be precisely set and controlled. Used as an in-circuit element for trimming or setting a combination of voltage and/or current characteristics, it can be programmed via a Personal Computer remotely and automatically via software control. Once programmed and set, the set voltage and current levels are stored indefinitely inside the device as a precisely controlled nonvolatile stored charge, which is not affected during normal operation of the device, even after power has been turned off.

FEATURES

• Operates from 2V, 3V, 5V to 10V

• Flexible basic circuit building block and design element

• Very high resolution -- average programmable voltage resolution of 0.1mV

• Wide dynamic range -- current levels from 0.1µA to 3000µA

• Voltage adjustment range from 1.000V to 3.000V in 0.1mV steps

• Proven, non-volatile CMOS technology

• Typical 10 years drift of less than 2mV

• Usable in voltage mode or current mode

• High input impedance -- 1012Ω

• Very high DC current gain -- greater than 109

• Device operating current has positive temperature

coefficient range and negative temperature

coefficient range with cross-over zero temperature

coefficient current level at 68µA

• Tight matching and tracking of on-resistance between different devices with programming

• Very low input currents and leakage currents

• Low cost, monolithic technology

• Application-specific or in-system programming modes

• User programmable software-controlled automation

• User programmability of any standard/custom configuration

• Micropower operation

• Available in standard PDIP, SOIC and hermetic CDIP packages

• Suitable for matched-pair balanced circuit configuration

• Suitable for both coarse and fine trimming applications