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ADR291ERZ-REEL7 Scheda tecnica(PDF) 1 Page - Analog Devices |
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ADR291ERZ-REEL7 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 20 page Low Noise Micropower 2.5 V and 4.096 V Precision Voltage References ADR291/ADR292 Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007–2011 Analog Devices, Inc. All rights reserved. FEATURES Supply range 2.8 V to 15 V, ADR291 4.4 V to 15 V, ADR292 Supply current: 15 μA maximum Low noise: 8 μV and 12 μV p-p (0.1 Hz to 10 Hz) High output current: 5 mA Temperature range: −40°C to +125°C Pin-compatible with REF02/REF19x APPLICATIONS Portable instrumentation Precision reference for 3 V and 5 V systems Analog-to-digital and digital-to-analog converter reference Solar-powered applications Loop-current-powered instruments CONNECTION DIAGRAMS NC 1 VIN 2 NC 3 GND 4 NC 8 NC 7 VOUT 6 NC 5 NC = NO CONNECT ADR291/ ADR292 TOP VIEW (Not to Scale) Figure 1. 8-Lead SOIC (R-8) 1 2 3 4 VIN NC GND NC 8 7 6 5 NC VOUT NC NC NC = NO CONNECT ADR291/ ADR292 TOP VIEW (Not to Scale) Figure 2. 8-Lead TSSOP (RU-8) 321 VOUT GND VIN TOP VIEW (Not to Scale) ADR291 Figure 3. 3-Lead TO-92 (T-3) GENERAL DESCRIPTION The 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 band gap and buried Zener-based references. Improvements include one quarter the voltage noise output of band gap references operating at the same current, very low and ultralinear temperature drift, low thermal hysteresis, and excellent long-term stability. The ADR291/ADR292 family is a series of voltage references providing stable and accurate output voltages from supplies as low as 2.8 V for the ADR291. Output voltage options are 2.5 V and 4.096 V for the 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 maximum for the ADR291, and ±3 mV, ±4 mV, and ±6 mV maximum for the ADR292. Temperature coefficients for the three grades are 8 ppm/°C, 15 ppm/°C, and 25 ppm/°C maximum, 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 to the ADR293 data sheet. The 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 3-lead TO-92 packages. Table 1. ADR291/ADR292 Product Part No. Output Voltage (V) Initial Accuracy (±%) Temperature Coefficient (ppm/°C) Max ADR291 2.500 0.08, 0.12, 0.24 8, 15, 25 ADR292 4.096 0.07, 0.10, 0.15 8, 15, 25 |
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