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 -- 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 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