ZRA125 PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE DESCRIPTION FEATURES • No stabilizing capacitor required 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. • Typical TC 30ppm/°C • Typical slope resistance 0.65⍀ • ± 3% and 2% tolerance The ZRA125 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA125 is recommended for operation between 50A and 5mA and so is ideally suited to low power and battery powered applications. • Industrial temperature range • Operating current 50A to 5mA • Transient response, stable in less than 10s 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. • 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 25mA Forward current 25mA Operating temperature -40 to 85°C Storage temperature -55 to 150°C POWER DISSAPATION (Tamb = 25°C) SOT23 330mW ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated) SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. TOL % VR Reverse breakdown voltage I R = 150A 1.25 1.25 1.275 1.29 2 3 I MIN Minimum operating current 30 50 A IR Recommended operating current 5 mA T C (1) Average reverse breakdown voltage temp. co. 30 90 ppm/°C R S (2) Slope resistance 0.65 2 ⍀ ZR Reverse dynamic impedance I R = 1mA f = 100Hz I AC = 0.1I R 0.5 1 ⍀ EN Wideband Noise Voltage I R = 150A f = 100Hz to 10kHZ 40 1.225 1.21 0.05 I R (min) to I R (max) UNITS V V 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 Tol % Package Part Mark Reel Size Quantity per reel ZRA125F02TA 2 SOT23 12B 7” 3,000 ZRA125F03TA 3 SOT23 12A 7” 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 Inches Min Max Min Max A 2.67 3.05 0.105 0.120 B 1.20 1.40 0.047 C ᎏ 1.10 ᎏ D 0.37 0.53 F 0.085 0.15 G 1.90 NOM Millimeters DIM Inches Min Max Max Max H 0.33 0.51 0.013 0.020 0.055 K 0.01 0.10 0.0004 0.004 0.043 L 2.10 2.50 0.083 0.0985 0.015 0.021 M 0.45 0.64 0.018 0.025 0.0034 0.0059 N 0.95 NOM 0.0375 NOM ᎏ ᎏ ᎏ 0.075 NOM © Zetex plc 2004 Europe Americas Asia Pacific Corporate Headquaters Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Zetex Inc 700 Veterans Memorial Hwy Hauppauge, NY 11788 USA Zetex (Asia) Ltd 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Zetex plc Fields New Road, Chadderton Oldham, OL9 8NP United Kingdom Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 [email protected] Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 [email protected] Telephone: (852) 26100 611 Fax: (852) 24250 494 [email protected] Telephone (44) 161 622 4444 Fax: (44) 161 622 4446 [email protected] 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