ADR291FR-REEL View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADR291FR-REEL Datasheet PDF : 15 Pages
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a
Low Noise Micropower
Precision Voltage References
ADR290/ADR291/ADR292
FEATURES
Voltage Options 2.048 V, 2.500 V and 4.096 V
2.7 V to 15 V Supply Range
Supply Current 12 A max
Initial Accuracy ؎2 mV max
Temperature Coefficient 8 ppm/؇C max
Low-Noise 6 V p-p (0.1 Hz–10 Hz)
High Output Current 5 mA min
Temperature Range ؊40؇C to ؉125؇C
REF02/REF19x Pinout
APPLICATIONS
Portable Instrumentation
Precision Reference for 3 V and 5 V Systems
A/D and D/A Converter Reference
Solar Powered Applications
Loop-Current Powered Instruments
GENERAL DESCRIPTION
The ADR290, ADR291 and ADR292 are low noise, micro-
power precision voltage references that use an XFET™ reference
circuit. The new XFET architecture offers significant perfor-
mance improvements over traditional bandgap and Zener-based
references. Improvements include: one quarter the voltage noise
output of bandgap references operating at the same current,
very low and ultralinear temperature drift, low thermal hyster-
esis and excellent long-term stability.
The ADR29x family are series voltage references providing stable
and accurate output voltages from supplies as low as 2.7 V. Out-
put voltage options are 2.048 V, 2.5 V and 4.096 V for the
ADR290, ADR291 and ADR292 respectively. Quiescent current
is only 12 µA, making these devices ideal for battery powered in-
strumentation. Three electrical grades are available offering initial
output accuracies of ± 2 mV, ± 3 mV and ± 6 mV max for the
ADR290 and ADR291 and ± 3 mV, ± 4 mV and ± 6 mV max for
the ADR292. Temperature coefficients for the three grades are
8 ppm/°C, 15 ppm/°C and 25 ppm/°C max, respectively. Line
regulation and load regulation are typically 30 ppm/V and
30 ppm/mA, maintaining the reference’s overall high perfor-
mance. For a device with 5.0 V output, refer to the ADR293
data sheet.
The ADR290, ADR291 and ADR292 references are specified
over the extended industrial temperature range of –40°C to
+125°C. Devices are available in the 8-lead SOIC, 8-lead TSSOP
and the TO-92 package.
PIN CONFIGURATIONS
8-Lead Narrow Body SO (R Suffix)
1
8
VIN 2
ADR29x
TOP VIEW
7
3 (Not to Scale) 6 VOUT
GND 4
5
8-Lead TSSOP (RU Suffix)
1
8
VIN 2
ADR29x 7
TOP VIEW
3 (Not to Scale) 6 VOUT
GND 4
5
3-Pin TO-92 (T9 Suffix)
PIN 1 PIN 2 PIN 3
VIN
GND VOUT
BOTTOM VIEW
Part Number Nominal Output Voltage (V)
ADR290
ADR291
ADR292
2.048
2.500
4.096
XFET is a trademark of Analog Devices, Inc.
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 2000
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