A Product Line of Diodes Incorporated ZR285 PRECISION 2.5V MICROPOWER VOLTAGE REFERNCE Description Pin Assignment The ZR285 uses a bandgap circuit design to achieve a precision micropower voltage reference of 2.5 volts. The device is available in a small outline surface mount package, ideal for applications where space saving is important. The ZR285 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR285 is recommended for operation between 20μA and 20mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to an absolute maximum of 30mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds. Features • (Top View) Pin 1 floating or connected to pin 2 Typical Application Circuit Small outline SOT23 style package • No stabilizing capacitor required • Low knee current, 15μA typical • Typical TC 30ppm/°C • Typical slope resistance 0.4Ω • • • ± 2% tolerance Industrial temperature range Operating current 20μA to 20mA Applications • • • • • • Battery powered and portable equipment Metering and measurement systems Instrumentation Test equipment Data acquisition systems Precision power supplies ZR285 Document number: DS32168 Rev. 8 - 2 1 of 5 www.diodes.com May 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZR285 Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated) Parameter Reverse Current Forward Current Operating Temperature Storage Temperature Power Dissipation (TAMB = 25°C) SOT23 Electrical Characteristics Symbol Reverse breakdown voltage Minimum operating current Recommended operating current Average reverse breakdown voltage temperature coefficient Slope resistance (*) TC (†) RS Unit mA mA °C °C 330 mW (Test conditions: Tamb = 25°C, unless otherwise specified.) Parameter VR IMIN IR Rating 30 25 -40 to 85 -55 to 150 ZR Reverse dynamic impedance EN Wideband noise voltage Condition IR = 150µA Min. Typ. Max. Tol. (%) Unit 2.45 2.5 13 2.55 20 20 2 V µA mA 30 90 ppm/°C 0.4 1 Ω 0.3 0.8 Ω 0.02 IR = 1mA to 20mA IR = 1mA f = 100Hz IAC = 0.1IR IR = 150µA f = 10Hz to 10kHz 60 µV(rms) Notes: (*) TC = (VR(MAX) – VR(MIN)) x 1000000 VR x (T(MAX) – T(MIN)) Note: VR(MAX) - VR(MIN) is the maximum deviation in reference voltage measured over the full operating temperature range. (†) RS = VR Change (IR(MIN) to IR(MAX)) IR(MAX) – IR(MIN)) . ZR285 Document number: DS32168 Rev. 8 - 2 2 of 5 www.diodes.com May 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZR285 Typical Characteristics ZR285 Document number: DS32168 Rev. 8 - 2 3 of 5 www.diodes.com May 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZR285 Ordering Information* Order Reference ZR285F01TA ZR285F02TA ZR285F03TA Notes: Tol (%) 1 2 3 Device Mark Status (*) 28C 28B 28A Obsolete Released Obsolete Reel Size (inches) 7 7 7 Quantity per reel 3000 3000 3000 Tape Width (mm) 8 8 8 *ZR285F02TA is not recommended for new designs. Package Outline Dimensions E e e1 b 3 leads L1 D E1 A A1 L Dim. Millimeters Inches A A1 b c D e Min. Max. 1.12 0.01 0.10 0.30 0.50 0.085 0.20 2.80 3.04 0.95 NOM Min. Max. 0.044 0.0004 0.004 0.012 0.020 0.003 0.008 0.110 0.120 0.037 NOM c Dim. Millimeters Inches e1 E E1 L L1 - Min. Max. 1.90 NOM 2.10 2.64 1.20 1.40 0.25 0.60 0.45 0.62 - Min. Max. 0.075 NOM 0.083 0.104 0.047 0.055 0.0098 0.0236 0.018 0.024 - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches ZR285 Document number: DS32168 Rev. 8 - 2 4 of 5 www.diodes.com May 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZR285 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systemsrelated information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com ZR285 Document number: DS32168 Rev. 8 - 2 5 of 5 www.diodes.com May 2010 © Diodes Incorporated