GENERAL DESCRIPTION

ALD1121E/ALD1123E are monolithic quad/dual EPAD? (Electrically Programmable Analog Device) N-channel MOSFETs with electrically adjustable threshold (turn-on) voltage. The ALD1121E/ALD1123E are precision matched and adjusted (e-trimmed) at the factory resulting in quad/dual MOSFETs that are highly matched in electrical characteristics.

FEATURES

? Electrically Programmable Analog Device

? Proven, non-volatile CMOS technology

? Operates from 2V, 3V, 5V to 10V

? Flexible basic circuit building block and design element

? Very high resolution -- average e-trim 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

? Typical 10-year drift of less than 2mV

? Usable in voltage mode or current mode

? High input impedance -- 1012?

? 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 e-trim

? Very low input currents and leakage currents

? Low cost, monolithic technology

? Application-specific or in-system programming modes

? Optional user software-controlled automation

? Optional e-trim 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, as well as matched MOSFET array applications

? RoHS compliant

APPLICATIONS

? Precision PC-based electronic calibration

? Automated voltage trimming or setting

? Remote voltage or current adjustment of inaccessible nodes

? PCMCIA based instrumentation trimming

? Electrically adjusted resistive load

? Temperature compensated current sources and current mirrors

? Electrically trimmed/calibrated current sources

? Permanent precision preset voltage level shifter

? Low temperature coefficient voltage and/or current bias circuits

? Multiple preset voltage bias circuits

? Multiple channel resistor pull-up or pull-down circuits

? Microprocessor based process control systems

? Portable data acquisition systems

? Battery operated terminals and instruments

? Remote telemetry systems

? E-trimmable gain amplifiers

? Low level signal conditioning

? Sensor and transducer bias currents

? Neural networks