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ADR444

Analog Devices
Part Number ADR444
Manufacturer Analog Devices
Description LDO XFET Voltage References
Published Jan 16, 2007
Detailed Description Ultralow Noise, LDO XFET Voltage References with Current Sink and Source ADR440/ADR441/ADR443/ADR444/ADR445 FEATURES Ul...
Datasheet PDF File ADR444 PDF File

ADR444
ADR444

Overview
Ultralow Noise, LDO XFET Voltage References with Current Sink and Source ADR440/ADR441/ADR443/ADR444/ADR445 FEATURES Ultralow noise (0.
1 Hz to 10 Hz) ADR440: 1 μV p-p ADR441: 1.
2 μV p-p ADR443: 1.
4 μV p-p ADR444: 1.
8 μV p-p ADR445: 2.
25 μV p-p Superb temperature coefficient A grade: 10 ppm/°C B grade: 3 ppm/°C Low dropout operation: 500 mV Input range: (VOUT + 500 mV) to 18 V High output source and sink current +10 mA and −5 mA, respectively Wide temperature range: −40°C to +125°C APPLICATIONS Precision data acquisition systems High resolution data converters Battery-powered instrumentation Portable medical instruments Industrial process control systems Precision instruments Optical control circuits GENERAL DESCRIPTION The ADR44x series is a family of XFET® voltage references featuring ultralow 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 ADR44x is greatly minimized.
The XFET references offer better noise performance than buried Zener references, and XFET references operate off low supply voltage headroom (0.
5 V).
This combination of features makes the ADR44x family ideally suited for precision signal conversion applications in high-end data acquisition systems, optical networks, and medical applications.
The ADR44x family has the capability to source up to 10 mA of output current and sink up to −5 mA.
It also comes with a trim terminal to adjust the output voltage over a 0.
5% range without compromising performance.
05428-001 PIN CONFIGURATIONS TP 1 VIN 2 NC 3 ADR440/ ADR441/ ADR443/ ADR444/ ADR445 8 TP 7 NC 6 VOUT GND 4 TOP VIEW 5 TRIM (Not to Scale) NOTES 1.
NC = NO CONNECT 2.
TP = TEST PIN (DO NOT CONNECT) Figure 1.
8-Lead SOIC_N (R-Suffix) TP 1 VIN 2 NC 3 GND 4 ADR440/ ADR441/ ADR443/ ADR444/ ADR445 TOP VIEW (Not to Scale) 8 TP 7 NC 6 VOUT 5 TRIM NOTES 1.
NC ...


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