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A Product Line of Diodes Incorporated
ZR285
PRECISION 2.5V MICROPOWER VOLTAGE REFERNCE
Description
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 20A 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.
Pin Assignment
(Top View) Pin 1 floating or connected to pin 2
Features
* * * * * * * * Small outline SOT23 style package No stabilizing capacitor required Low knee current, 15A typical Typical TC 30ppm/C Typical slope resistance 0.4 2% tolerance Industrial temperature range Operating current 20A to 20mA
Typical Application Circuit
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
(c) 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 = 25C) SOT23 Rating 30 25 -40 to 85 -55 to 150 330 Unit mA mA C C mW
Electrical Characteristics
Symbol VR IMIN IR TC
(*) ()
(Test conditions: Tamb = 25C, unless otherwise specified.)
Parameter Reverse breakdown voltage Minimum operating current Recommended operating current Average reverse breakdown voltage temperature coefficient Slope resistance Reverse dynamic impedance
Condition IR = 150A
Min. 2.45 0.02
Typ. 2.5 13 30 0.4 0.3
Max. 2.55 20 20 90 1 0.8
Tol. (%) 2
Unit V A mA ppm/C
RS ZR
IR = 1mA to 20mA IR = 1mA f = 100Hz IAC = 0.1IR IR = 150A f = 10Hz to 10kHz
EN
Notes:
(*)
Wideband noise voltage
60
V(rms)
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
(c) 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
(c) Diodes Incorporated
A Product Line of Diodes Incorporated
ZR285 Ordering Information*
Order Reference ZR285F01TA ZR285F02TA ZR285F03TA
Notes:
Tol (%) 1 2 3
Device Mark 28C 28B 28A
Status (*) 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 b 3 leads e1
L1
E1
D
A A1 L c
Dim. A A1 b c D e
Millimeters Min. Max. 1.12 0.01 0.10 0.30 0.50 0.085 0.20 2.80 3.04 0.95 NOM
Inches Min. Max. 0.044 0.0004 0.004 0.012 0.020 0.003 0.008 0.110 0.120 0.037 NOM
Dim. e1 E E1 L L1 -
Millimeters Min. Max. 1.90 NOM 2.10 2.64 1.20 1.40 0.25 0.60 0.45 0.62 -
Inches 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
(c) 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 (c) 2010, Diodes Incorporated www.diodes.com
ZR285
Document number: DS32168 Rev. 8 - 2
5 of 5 www.diodes.com
May 2010
(c) Diodes Incorporated

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