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| ZRA125 PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE DESCRIPTION The ZRA125 uses a bandgap circuit design to achieve a precision micropower voltage reference of 1.25 volts. The device is available in small outline surface mount packages, ideal for applications where space saving is important. The ZRA125 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA125 is recommended for operation between 50 A and 5mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to a suggested absolute maximum of 25mA, 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 * No stabilizing capacitor required * Typical TC 30ppm/C * Typical slope resistance 0.65 * 3% and 2% tolerance * Industrial temperature range * Operating current 50 A to 5mA * Transient response, stable in less than 10 s * Small outline SOT23 package APPLICATIONS * Battery powered and portable equipment * Metering and measurement systems * Instrumentation * Data acquisition systems * Precision power supplies SCHEMATIC DIAGRAM * Test equipment ISSUE 3 - MARCH 2004 1 SEMICONDUCTORS ZRA125 ABSOLUTE MAXIMUM RATINGS Reverse current Forward current Operating temperature Storage temperature 25mA 25mA -40 to 85C -55 to 150C POWER DISSAPATION (Tamb = 25C) SOT23 330mW ELECTRICAL CHARACTERISTICS (at Tamb = 25C unless otherwise stated) SYMBOL PARAMETER VR I MIN IR T C (1) R S (2) ZR Reverse breakdown voltage Minimum operating current Recommended operating current Average reverse breakdown voltage temp. co. Slope resistance Reverse dynamic impedance I R = 1mA f = 100Hz I AC = 0.1I R I R = 150 A f = 100Hz to 10kHZ I R (min) to I R (max) 0.05 30 0.65 0.5 CONDITIONS MIN. I R = 150 A 1.225 1.21 TYP. 1.25 1.25 30 MAX. 1.275 1.29 50 5 90 2 1 TOL % 2 3 UNITS V V A mA ppm/C EN Wideband Noise Voltage 40 V(rms) NOTES: (1) TC = V R change x 1000,000 , V R X temperature change TC is a characterized parameter not measured on individual devices. (2) RS = V R change (I R (min) to (min) to I R (max)) I R (max) - I R (min) ISSUE 3 - MARCH 2004 SEMICONDUCTORS 2 ZRA125 TYPICAL CHARACTERISTICS ISSUE 3 - MARCH 2004 3 SEMICONDUCTORS ZRA125 CONNECTION DIAGRAM Package Suffix - F TOP VIEW Pin 1 floating or connected to pin 2 ORDERING INFORMATION Part Number ZRA125F02TA ZRA125F03TA Tol % 2 3 Package SOT23 SOT23 Part Mark 12B 12A Reel Size 7" 7" Quantity per reel 3,000 3,000 ISSUE 3 - MARCH 2004 SEMICONDUCTORS 4 ZRA125 PACKAGE OUTLINE PAD LAYOUT DETAILS Controlling dimensions are in millimeters. Approximate conversions are given in inches PACKAGE DIMENSIONS Millimeters DIM A B C D F G 0.37 0.085 Min 2.67 1.20 Max 3.05 1.40 1.10 0.53 0.15 0.015 0.0034 Inches Min 0.105 0.047 Max 0.120 0.055 0.043 0.021 0.0059 DIM H K L M N Millimeters Min 0.33 0.01 2.10 0.45 Max 0.51 0.10 2.50 0.64 Inches Max 0.013 0.0004 0.083 0.018 Max 0.020 0.004 0.0985 0.025 0.95 NOM 0.0375 NOM 1.90 NOM 0.075 NOM (c) Zetex plc 2004 Europe Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Americas Zetex Inc 700 Veterans Memorial Hwy Hauppauge, NY 11788 USA Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Asia Pacific Zetex (Asia) Ltd 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com Corporate Headquaters Zetex plc Fields New Road, Chadderton Oldham, OL9 8NP United Kingdom Telephone (44) 161 622 4444 Fax: (44) 161 622 4446 hq@zetex.com These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to www.zetex.com ISSUE 3 - MARCH 2004 5 SEMICONDUCTORS |
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