ZRT050 4.9V LOW POWER PRECISION REFERENCE SOURCE Description Pin Assignments The ZRT050 is a monolithic integrated circuit providing a precise stable reference voltage of 4.9V at 500μA. The circuit features a knee current of 150μA and operation over a wide range of temperatures and currents. The ZRT050 is available in a SOT223 package for surface mount applications. This device offers a trim facility whereby the output voltage can be adjusted as shown in the schematic diagram. This facility is used when compensating for system errors or setting the reference output to a particular value. When the trim facility is not used, the pin should be left open circuit. SOT223 TRIM 1 GND 2 4 VR 3 Top View (Pin 4 floating or connected to pin 2) Features • • • • • • • • • Trimmable output Excellent temperature stability Low output noise figure -40 to 85°C operating temperature range 1% initial voltage tolerance No external stabilizing capacitor required in most cases Low slope resistance No derating required at low temperatures SOT223 small outline package Schematic Diagram This circuit will allow the reference to be trimmed over a wide range. The device is specified over a ±5% trim range. ZRT050 Document number: DS33259 Rev. 4 - 2 1 of 5 www.diodes.com February 2011 © Diodes Incorporated ZRT050 4.9V LOW POWER PRECISION REFERENCE SOURCE Absolute Maximum Ratings Parameter Symbol Value Unit 60 mA Reverse Current (Note 1) Operating Temperature: C grade TOMP -40 to +85 °C Storage Temperature TSTG -55 to +150 °C Notes: 1. Above 72°C this figure should be linearly derated to 15mA @ 125°C Power Dissipation (@Tamb = 25°C unless otherwise stated) Package Value Unit SOT223 2 W Temperature Dependent Electrical Characteristics Symbol ΔVR TCVR Grade C -40 to 85°C Typ. Max. Parameter Output voltage change over operating temperature range Output voltage temperature coefficient (see Note B) Unit 5.4 17.2 mV 15.0 50.0 ppm/°C Electrical Characteristics (@Tamb = 25°C unless otherwise stated) Symbol VR VTRIM TCVTRIM Parameter Conditions Min. Typ. Max. Unit Output voltage: 1% tolerance IR = 500 µA 4.85 4.90 4.95 V Output voltage adjustment range RT = 100kΩ Change in TCVR with output adjustment IR Operating current range ton toff Turn-on time Turn-off time enp-p RS ±5 Output voltage noise (over the range 0.1 to 10Hz) Slope resistance (see Note D) ZRT050 Document number: DS33259 Rev. 4 - 2 % 2.5 (See Note C) 0.15 ppm/°C 60 mA RL = 1kΩ 100 0.3 µs Peak to peak measurement 50 µV IR = 0.5mA to 5mA 1.25 2 of 5 www.diodes.com 2.0 Ω February 2011 © Diodes Incorporated ZRT050 4.9V LOW POWER PRECISION REFERENCE SOURCE Typical Characteristics (a) Output change with temperature (d) Slope resistance (RS) The absolute maximum difference between the maximum output voltage and the minimum output voltage over the specified temperature range: The slope resistance is defined as: ΔVR=VMAX - VMIN (b) Output temperature coefficient (TCVR) The ratio of the output change with temperature to the specified temperature range expressed in ppm/°C: (e) Line regulation The ratio of change in output voltage to the change in input voltage producing it: ΔT= Full temperature range (c) Operating current (IR) Maximum operating current must be derated as indicated in maximum ratings. ZRT050 Document number: DS33259 Rev. 4 - 2 3 of 5 www.diodes.com February 2011 © Diodes Incorporated ZRT050 4.9V LOW POWER PRECISION REFERENCE SOURCE Ordering Information Device Tol % Operating Temperature Part Mark Reel Size Tape Width Quantity Per Reel ZRT050GC1 1 -40 to +85°C ZRT050C1 7” 12mm 1000 Package Outline Dimensions (All Dimensions in mm) SOT223 DIM A A1 b b2 C D Millimeters Min Max 1.80 0.02 0.10 0.66 0.84 2.90 3.10 0.23 0.33 6.30 6.70 Inches Min Max 0.071 0.0008 0.004 0.026 0.033 0.114 0.122 0.009 0.013 0.248 0.264 DIM e e1 E E1 L - Millimeters Min Max 2.30 BSC 4.60 BSC 6.70 7.30 3.30 3.70 0.90 - Inches Min Max 0.0905 BSC 0.181 BSC 0.264 0.287 0.130 0.146 0.355 - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches. ZRT050 Document number: DS33259 Rev. 4 - 2 4 of 5 www.diodes.com February 2011 © Diodes Incorporated ZRT050 4.9V LOW POWER PRECISION REFERENCE SOURCE 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. 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