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Analog Devices - Ultralow Noise XFET Voltage References with Current Sink and Source Capability

Numéro de référence ADR434
Description Ultralow Noise XFET Voltage References with Current Sink and Source Capability
Fabricant Analog Devices 
Logo Analog Devices 





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ADR434 fiche technique
Ultralow Noise XFET® Voltage References
with Current Sink and Source Capability
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
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
APPLICATIONS
Precision data acquisition systems
High resolution data converters
Medical instruments
Industrial process control systems
Optical control circuits
Precision instruments
GENERAL DESCRIPTION
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.
PIN CONFIGURATIONS
TP 1
8 TP
VIN 2 ADR43x 7 NC
NC
3
TOP VIEW
(Not to Scale)
6
VOUT
GND 4
5 TRIM
NC = NO CONNECT
Figure 1. 8-Lead MSOP
(RM Suffix)
TP 1
8 TP
VIN 2 ADR43x 7 NC
NC
3
TOP VIEW
(Not to Scale)
6
VOUT
GND 4
5 TRIM
NC = NO CONNECT
Figure 2. 8-Lead SOIC
(R Suffix)
All versions are specified over the extended industrial tempera-
ture range (−40°C to +125°C).
Table 1. Selection Guide
Model
Accuracy
VOUT (V) (mV)
ADR430B 2.048 ±1
ADR430A 2.048 ±3
ADR431B 2.500 ±1
ADR431A 2.500 ±3
ADR433B 3.000 ±1.4
ADR433A 3.000 ±4
ADR434B 4.096 ±1.5
ADR434A 4.096 ±5
ADR435B 5.000 ±2
ADR435A 5.000 ±6
ADR439B 4.500 ±2
ADR439A 4.500 ±5.4
Temperature Coefficient
(ppm/°C)
3
10
3
10
3
10
3
10
3
10
3
10
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.

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