UNISONIC TECHNOLOGIES CO., LTD M385 Preliminary LINEAR INTEGRATED CIRCUIT MICROPOWER VOLTAGE REFERENCE DESCRIPTION The UTC M385 is a micropower voltage reference. This device features good temperature stability and extreme low dynamic impedance when it is operated over a 10μA to 20mA current. Low noise and good long-term stability are achieved because the UTC M385 bandgap reference applies only bipolar transistors and resistors. The UTC M385 can be used in almost any reference application due to the exceptional tolerance of capacitive loading. This voltage reference can be applied in portable meters, regulators, or general-purpose analog circuitry with battery life approaching shelf life. The wide dynamic operating range contributes to its use with widely varying supplies with excellent regulation. The low power drain of the UTC M385 is useful for micropower circuitry. On-chip trimming gives it the tight voltage tolerance. Furthermore, the wide operating current can replace older references with a tighter tolerance. The UTC M385 can be used in such applications, for example, portable and battery-powered equipment, instrumentation, process control, energy management, product testing, automotive, precision audio components, and so on. FEATURES * Initial tolerance: 1% * Operating current range:10μA~20mA * Low temperature coefficient * Low voltage reference ORDERING INFORMATION Note: Ordering Number Lead Free Halogen Free M385L-xx-S08-R M385G-xx-S08-R xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing SOP-8 Tape Reel 1 of 6 QW-R101-028.c M385 Preliminary MARKING INFORMATION PACKAGE VOLTAGE CODE SOP-8 12: 1.2V 25: 2.5V MARKING G: Halogen Free L: Lead Free Voltage Code UTC M385 XX Date Code Lot Code PIN CONNECTIONS NC 1 8 + NC 2 7 NC NC 3 6 - LINEAR INTEGRATED CIRCUIT NC 5 NC 4 PIN DESCRIPTIONS PIN NO. 1 2 3 4 5 6 7 PIN NAME NC NC NC NC NC NC 8 + PIN FUNCTION Not connected Not connected Not connected Pin-sources current for normal application, the current value is the same as Pin+ Not connected Not connected Not connected Sinks current with a range from 20μA to 20mA for normal applications, a stable positive voltage, relative to Pin-, occurs on Pin- UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R101-028.c M385 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R101-028.c M385 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Reverse Current IR 30 mA Forward Current IF 10 mA Junction Temperature TJ 125 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified.) M385-1.2V PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Charge with Current Reverse Dynamic Impedance Minimum Operating Current Wideband Noise Average Temperature Coefficient Long Term Stability SYMBOL VR ΔVR ZR IR(MIN) eN αVR ΔVR Δt CONDITIONS IR=100μA 10μA<IR<1mA 1mA <IR<20mA IR =100μA ,f=20Hz IR =100μA,10Hz≤f≤10KHz IR =100μA IR =100μA, T=1000Hrs, Ta=25°C MIN TYP MAX UNIT 1.222 1.235 1.248 V 1 mV 20 mV 1 Ω 8 15 μA 60 μVrms 100 ppm/°C 20 ppm M385-2.5V PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Charge with Current Reverse Dynamic Impedance Minimum Operating Current Wideband Noise Average Temperature Coefficient Long Term Stability SYMBOL VR ΔVR ZR IR(MIN) eN αVR ΔVR Δt CONDITIONS IR=100μA 10μA<IR<1mA 1mA <IR<20mA IR =100μA ,f=20Hz IR =100μA,10Hz≤f≤10KHz IR =100μA IR =100μA, T=1000Hrs, Ta=25°C UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 2.475 2.5 2.525 V 1 mV 20 mV 1 Ω 8 15 μA 60 μVrms 100 ppm/°C 20 ppm 4 of 6 QW-R101-028.c M385 Preliminary LINEAR INTEGRATED CIRCUIT TEST CIRCUIT VIN RS VREF IR UTC M385-XX APPLICATION CIRCUITS R1 R1 -30V 4 VIN (Note 1) IOUT 3 2 7 6 IOUT IOUT 2 UTC M385-XX C 150pF R2 100K VREF = R1 3 VIN (Note 2) IOUT VREF = R1 4 6 7 30V UTC M385-XX C 150pF R2 100K Precision 1µA to 1mA Current Source 9V R1 VREF (Note 3) Micropower Reference from 9V Battery Reference from 1.5V Battery (Only for M385-1.2V) Notes: 1. VREF=1.235V, -2.3V≤V+≤-27V, VREF=2.5V, -3.7≤V+≤-27V 2. VREF=1.235V, 2.3V≤V+≤27V, VREF=2.5V, 3.7≤V+≤27V 3. VREF=1.235V, R1=900KΩ, VREF=2.5V, R1=220KΩ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R101-028.c M385 Preliminary LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R101-028.c