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AD680AR-REEL7 Datasheet(PDF) 1 Page - Analog Devices |
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AD680AR-REEL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page Low Power, Low Cost 2.5 V Reference AD680 Rev. H 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: 781.461.3113 ©2005 Analog Devices, Inc. All rights reserved. FEATURES Low quiescent current at 250 μA max Laser trimmed to high accuracy 2.5 V ± 5 mV max (AN, AR grades) Trimmed temperature coefficient 20 ppm/°C max (AN, AR grades) Low noise at 8 μV p-p from 0.1 Hz to 10 Hz 250 nV/√Hz wideband Temperature output pin (N, R packages) Available in three package styles 8-lead PDIP, 8-lead SOIC, and 3-pin TO-92 GENERAL DESCRIPTION The AD680 is a band gap voltage reference that provides a fixed 2.5 V output from inputs between 4.5 V and 36 V. The architecture of the AD680 enables the reference to be operated at a very low quiescent current while still realizing excellent dc characteristics and noise performance. Trimming of the high stability thin-film resistors is performed for initial accuracy and temperature coefficient, resulting in low errors over temperature. The precision dc characteristics of the AD680 make it ideal for use as a reference for DACs that require an external precision reference. The device is also ideal for ADCs and, in general, can offer better performance than the standard on-chip references. Based upon its low quiescent current, which rivals that of many incomplete 2-terminal references, the AD680 is recommended for low power applications, such as hand-held, battery-operated equipment. A temperature output pin is provided on the 8-lead package versions of the AD680. The temperature output pin provides an output voltage that varies linearly with temperature and allows the AD680 to be configured as a temperature transducer while providing a stable 2.5 V output. The AD680 is available in five grades. The AD680AN is speci- fied for operation from −40°C to +85°C, while the AD680JN is specified for 0°C to 70°C operation. Both the AD680AN and AD680JN are available in 8-lead PDIP packages. The AD680AR is specified for operation from −40°C to +85°C, while the AD680JR is specified for 0°C to 70°C operation. Both are available in 8-lead SOIC packages. The AD680JT is specified for 0°C to 70°C operation and is available in a 3-pin TO-92 package. CONNECTION DIAGRAMS * TP DENOTES FACTORY TEST POINT. NO CONNECTIONS SHOULD BE MADE TO THESE PINS. NC = NO CONNECT AD680 TOP VIEW (Not to Scale) TP* 1 +VIN 2 TEMP 3 GND 4 TP* TP* VOUT NC 8 7 6 5 Figure 1. 8-Lead PDIP and 8-Lead SOIC Pin Configuration AD680 BOTTOM VIEW (Not to Scale) 32 1 +VIN VOUT GND Figure 2. Connection Diagram TO-92 PRODUCT HIGHLIGHTS 1. High Accuracy. The AD680 band gap reference operates on a very low quiescent current which rivals that of many 2-terminal references. This makes the complete, higher accuracy AD680 ideal for use in power-sensitive applications. 2. Low Errors. Laser trimming of both initial accuracy and temperature coef- ficients results in low errors over temperature without the use of external components. The AD680AN and AD680AR have a maximum variation of 6.25 mV between −40°C and +85°C. 3. Low Noise. The AD680 noise is low, typically 8 μV p-p from 0.1 Hz to 10 Hz. Spectral density is also low, typically 250 nV/√Hz. 4. Temperature Transducer. The temperature output pin on the 8-lead package versions enables the AD680 to be configured as a temperature transducer. 5. Low Cost. PDIP packaging provides machine insertability, while SOIC packaging provides surface-mount capability. TO-92 packaging offers a cost-effective alternative to 2-terminal references, offering a complete solution in the same package in which 2-terminal references are usually found. |
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Similar Description - AD680AR-REEL7 |
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