ZXRE1004 SOT23 MICROPOWER (4µA) 1.22V VOLTAGE REFERENCE maintained over the 8µA to 20mA operating current range with a typical temperature coefficient of only 20ppm/°C. The device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. DESCRIPTION The ZXRE1004 is a 1.22 volt bandgap reference circuit designed for ultra low current operation, typically 4µA. The device is available in a SOT23 surface mount package offering the ultimate in space and power saving. These features make the ZXRE1004 particularly suitable for portable and battery powered applications. As well as the SOT23, the ZXRE1004 can offer a pin for pin compatible alternative to the REF1004, LT1004 and LM185/385 series of voltage references with an E-Line (TO92 style) equivalent. SOT23 tolerance selection is available to 0.5% for precision applications. Excellent performance is FEATURES • High performance alternative to REF1004, LT1004 and LM185/385 references • Battery powered equipment • Precision power supplies • Portable instrumentation • Portable communications devices Notebook and palmtop computers • 4µA typical knee current • Small outline SOT23 package • • E-Line alternative available • 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 27k 1.22V Gnd APPLICATIONS Ultra low quiescent reference from a 1.5V battery source. ISSUE 3 - JANUARY 2003 1 ZXRE1004 ABSOLUTE MAXIMUM RATINGS Reverse Current Forward Current Operating temperature. Storage temperature. Power Dissipation (Tamb=25°C) SOT23 330mW E-Line 500mW 30mA 10mA -40 to 85°C -55 to 125°C ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C SYMBOL PARAMETER CONDITIONS I R =100 µ A LIMITS UNITS 0.5 ‡ 1 2 3 V 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 4 8 µA 20 mA 75 ppm/°C 1 10 mV mV 0.6 Ω 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=8 µA to 1mA IR=1mA to 20mA ZR Reverse Dynamic Impedance I R =1mA f =100Hz I AC =0.1 I R 0.2 EN Wideband Noise Voltage IR=8µA to 100µA f=10Hz to 10kHz 60 ∆IR TOL. % 0.008 20 µ V(rms) † TC = (VR (max )−VR ( min )) x 1000000 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. Reverse Current (µA) 10 ‡ Note: 0.5% SOT23 only 8 6 -40°C 25°C 85°C 4 2 0 0 0.2 0.4 0.6 0.8 1.0 Reverse Voltage (V) Reverse Characteristics ISSUE 3 - JANUARY 2003 2 1.2 1.4 ZXRE1004 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 100 14 Slope Resistance (Ω) Slope Resistance (Ω) 12 10 8 6 4 -40°C 25°C 85°C 2 0 0.001 0.01 0.1 1 10 10 1 20mA 1mA 100µA 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 (µV) VR (V) 70 1.0 10µA 0.5 20mA 0 Iin (µA) 僓 僓 10 0 60 50 40 30 20 10 0 0 40 80 120 140 0 Time (µs) 10 20 30 40 50 60 70 Reference Current (µA) Transient Response Noise Voltage ISSUE 3 - JANUARY 2003 3 80 90 100 ZXRE1004 Ordering Information Device TOL% Package Partmarking ZXRE1004CF 0.5 SOT23 10D ZXRE1004DF 1 SOT23 10C ZXRE1004EF 2 SOT23 10B ZXRE1004FF 3 SOT23 10A † 1 E-Line ZXRE1004D ZXRE1004ER † 2 E-Line ZXRE1004E ZXRE1004FR † 3 E-Line ZXRE1004F ZXRE1004DR †Contact Zetex marketing for availability of these package options NOTE: for tape and reel options add suffix TA to the part number eg ZXRE1004DFTA 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 Streitfeldstraße 19 D-81673 München 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 3 - JANUARY 2003 4