ZXRE125 SOT23 MICROPOWER 1.22V VOLTAGE REFERENCE DESCRIPTION typical temperature coefficient of only 20ppm/C. The device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. The ZXRE125 is a bandgap circuit designed to achieve a precision micropower voltage reference of 1.22 volts. The device is available in the small outline SOT23 surface mount package which is ideal for applications where space saving is important. This device offers a SOT23 pin for pin compatible replacement of the ZRA124 and ZRA125 series of voltage references. An E-Line (TO92 style) package is also available. SOT23 tolerance is available to 0.5% for precision applications. Excellent performance is maintained over the 30A to 5mA operating current range with a FEATURES * High performance replacement for ZRA124 and ZRA125 references * Battery powered equipment * Precision power supplies * Portable instrumentation Portable communications devices * Small outline SOT23 * * SO8 and E-Line alternatives available * Notebook and palmtop computers * 30A knee current * Data acquisition systems * 20ppm/C typical temperature coefficient * A/D and D/A converters * Unconditionally stable * Test equipment * 0.5%, 1%, 2% and 3% tolerance * Contact Zetex marketing for availability of tighter tolerance devices SCHEMATIC DIAGRAM APPLICATIONS CIRCUIT VR 1.5V 4k7 1.22V Gnd Low quiescent reference from a 1.5V battery source. APPLICATIONS ISSUE 5 - JANUARY 2003 1 ZXRE125 ABSOLUTE MAXIMUM RATINGS Reverse Current Forward Current Operating temperature. Storage temperature. Power Dissipation (Tamb=25C) SOT23 330mW E-Line 500mW 30mA 10mA -40 to 85C -55 to 125C ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C SYMBOL PARAMETER CONDITIONS LIMITS MIN TYP MAX 1.214 1.208 1.196 1.183 1.22 1.22 1.22 1.22 1.226 1.232 1.244 1.257 VR Reverse Breakdown Voltage I MIN Minimum Knee Current IR Recommended Operating Current Range TC Average Reverse Breakdown Voltage Temperature Coefficient I R(min) to I R(max) VR Reverse Breakdown Voltage change with Current IR=30A to 1mA IR=1mA to 5mA ZR Reverse Dynamic Impedance I R =1mA f =100Hz I AC =0.1 I R 0.2 EN Wideband Noise Voltage IR=8A to 100A f=10Hz to 10kHz 60 IR I R =100A 0.03 20 TOL. % UNITS 0.5 1 2 3 V 30 A 5 mA 90 ppm/C 1 10 mV mV 0.6 V(rms) 5 TC = VR x (T(max )-T(min )) Note: V R(max) - V R(min) is the maximum deviation in reference voltage measured over the full operating temperature range. Note: 0.5% SOT23 only. 4 Reverse Current (mA) (VR (max )-VR ( min )) x 1000000 3 TA=-40c TO +85C 2 1 0 0 0.2 0.4 0.6 0.8 1.0 Reverse Voltage (V) Reverse Characteristics ISSUE 5 - JANUARY 2003 2 1.2 1.4 ZXRE125 1.6 1.25 1.4 1.24 Reference Voltage (V) Forward Voltage (V) TYPICAL CHARACTERISTICS 1.2 1.0 0.8 0.6 0.4 0.2 0.1 1 10 100 1000 1.23 1.22 1.21 1.20 1.19 -40 -20 0 Forward Current (mA) 20 40 60 80 Temperature (C) Forward Characteristics Temperature Drift 14 100 Slope Resistance () Slope Resistance () 12 10 8 6 4 -40C 25C 85C 2 0 0.001 0.01 0.1 1 10 10 1 20mA 1mA 100A 0.1 0.01 100 0.1 Reference Current (mA) 1 10 100 Frequency (kHz) Slope Resistance v Frequency Slope Resistance v Current 80 1.5 Wideband Noise (V) VR (V) 70 1.0 10A 0.5 20mA 0 Iin (A) 10 0 60 50 40 30 20 10 0 0 40 80 120 140 0 Time (s) 10 20 30 40 50 60 70 Reference Current (A) Transient Response Noise Voltage ISSUE 5 - JANUARY 2003 3 80 90 100 ZXRE125 Ordering Information Device TOL% Package Partmarking ZXRE125CF 0.5 SOT23 12J ZXRE125DF 1 SOT23 12H ZXRE125EF 2 SOT23 12G ZXRE125FF 3 SOT23 12F ZXRE125DR 1 E-Line ZXRE125D ZXRE125ER 2 E-Line ZXRE125E ZXRE125FR 3 E-Line ZXRE125F NOTE: For tape and reel options add suffix TA to the part number eg ZXRE125DFTA Connection Diagrams SOT23 Package Suffix - F E-Line, 3 pin,Rev Package Suffix - R Top View - Pin 1 floating or connected to pin 2 Bottom View - Pin 3 floating or connected to pin 1 Zetex plc. Fields New Road, Chadderton, Oldham, OL9-8NP, United Kingdom. Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries) Fax: (44)161 622 4420 Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 Zetex Inc. 700 Veteran's Memorial Hwy Hauppauge, NY 11788 USA Telephone: (631) 360-2222 Fax: (631) 360-8222 Zetex (Asia) Ltd. 3701-04 Metroplaza, Tower 1 Hing Fong Road, Kwai Fong, Hong Kong Telephone:(852) 26100 611 Fax: (852) 24250 494 These are supported by agents and distributors in major countries world-wide Zetex plc 2003 www.zetex.com 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. ISSUE 5 - JANUARY 2003 4