ADR431 Ultralow Noise XFET Voltage References with Current Sink and Source Capability

The ADR43x series is a family of XFET voltage references featuring low noise, high accuracy, and low temperature drift performance. Using Analog Devices, Inc., patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, voltage change vs. temperature nonlinearity in the ADR43x 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 family has the capability to source up to 30 mA of output current and sink up to 20 mA. 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 8-lead MSOP and narrow SOIC packages. All versions are specified over the extended industrial temperature range of −40°C to +125°C.

The ADR431-EP Supports defense and aerospace applications (AQEC standard)

Applications

Precision data acquisition systems
High resolution data converters
Medical instruments
Industrial process control systems
Optical control circuits
Precision instruments

Features and Benefits

Low noise (0.1 Hz to 10.0 Hz): 3.5 µV p-p at 2.5 V output

No external capacitor required

Low temperature coefficient

A Grade: 10 ppm/°C maximum
B Grade: 3 ppm/°C maximum

A Grade: 10 ppm/°C maximum

B Grade: 3 ppm/°C maximum

Load regulation: 15 ppm/mA

Line regulation: 20 ppm/V

Wide operating range: 4.5 V to 18 V

See data sheet for additional features

Download ADR431-EP/ADR434-EP/ADR435-EP data sheet (pdf)

Military temperature range (−55°C to +125°C)

Controlled manufacturing baseline

One assembly/test site

One fabrication site

Enhanced product change notification

Qualification data available on request

V62/11602 DSCC Drawing Number

Linear Products

Voltage References

Security and Surveillance

Scanning Equipment

Instrumentation and Measurement

Electronic Test & Measurement

Reference Designs

CN0225 Design & Integration Files .ZIP

Data Sheets

Document	note
ADR430/ADR431/ADR433/ADR434/ADR435: Ultralow Noise XFET Voltage References with Current Sink and Source Capability Data Sheet (Rev. M)	PDF 1088 kB
ADR431/ADR434/ADR435-DSCC: Military Data Sheet
ADR431-EP/ADR434-EP/ADR435-EP: Enhanced Product Data Sheet (Rev. A)	PDF 145 kB

Application Notes

Document	note
AN-713: The Effect of Long-Term Drift on Voltage References (Rev. 0)	PDF 237 kB

Product Highlight

Document	note

Frequently Asked Questions

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Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADR431ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	3.18	2.96	Y
ADR431ARMZ-REEL7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	2.96	Y
ADR431ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	3.18	2.96	Y
ADR431ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	2.96	Y
ADR431BRMZ Production	8 ld MSOP	OTH 50	-40 to 125C	4.74	4.41	Y
ADR431BRMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	4.41	Y
ADR431BRZ Production	8 ld SOIC	OTH 98	-40 to 125C	4.74	4.41	Y
ADR431BRZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	4.41	Y
ADR431TRZ-EP Production	8 ld SOIC	OTH 98	-55 to 125C	7.11	6.62	Y
ADR431TRZ-EP-R7 Production	8 ld SOIC	REEL 1000	-55 to 125C	0	6.62	Y