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The ADR43x series is a family of XFET voltage references featuring low noise, high accuracy, and low temperature drift performance. Using ADI's patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, the ADR43x's voltage change versus temperature nonlinearity is minimized.
The XFET references operate at lower current (800 µA) and supply headroom (2 V) than buried-Zener references. Buried-Zener references require more than 5 V headroom for operations. The ADR43x XFET references are the only low noise solutions for 5 V systems.
The ADR43x series has the capability to source up to 30 mA and sink up to 20 mA of output current. It also comes with a TRIM terminal to adjust the output voltage over a 0.5% range without compromising performance. The ADR43x is available in the 8-lead mini SOIC and 8-lead SOIC packages.
ADR434 Maximum Ratings
Parameter
Rating
Supply Voltage
Output Short-Circuit Duration to GND
Storage Temperature Range (R, RM Packages)
Operating Temperature Range
Junction Temperature Range
Lead Temperature Range (Soldering, 60 s)
20 V
Indefinite
−65°C to +125°C
−40°C to +125°C
−65°C to +150°C
300°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Absolute maximum ratings apply individually only, not in combination.
ADR434 Features
Low noise (0.1 Hz to 10 Hz): 3.5 µV p-p @ 2.5 V output No external capacitor required Low temperature coefficient A Grade: 10 ppm/°C max B Grade: 3 ppm/°C max Load regulation: 15 ppm/mA Line regulation: 20 ppm/V Wide operating range ADR430: 4.1 V to 18 V ADR431: 4.5 V to 18 V ADR433: 5.0 V to 18 V ADR434: 6.1 V to 18 V ADR435: 7.0 V to 18 V ADR439: 6.5 V to 18 V High output current: +30 mA/−20 mA Wide temperature range: −40°C to +125°C
ADR434 Typical Application
Precision data acquisition systems High resolution data converters Medical instruments Industrial process control systems Optical control circuits Precision instruments