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ADR291

Analog Devices
Part Number ADR291
Manufacturer Analog Devices
Description Low Noise Micropower Precision Voltage References
Published Mar 23, 2005
Detailed Description a 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 Acc...
Datasheet PDF File ADR291 PDF File

ADR291
ADR291

Overview
a 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 Low Noise Micropower Precision Voltage References ADR290/ADR291/ADR292 PIN CONFIGURATIONS 8-Lead Narrow Body SO (R Suffix) 1 VIN 2 8 7 TOP VIEW (Not to Scale) 6 VOUT 3 5 ADR29x GND 4 8-Lead TSSOP (RU Suffix) 1 VIN 2 8 7 TOP VIEW 3 (Not to Scale) 6 VOUT 5 ADR29x GND 4 The ADR290, ADR291 and ADR292 are low noise, micropower precision voltage references that use an XFET™ reference circuit.
The new XFET architecture offers significant performance 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 hysteresis 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.
Output 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 instrumentation.
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 performance.
For a device with 5.
0 V output, refer t...


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