Low TCR, 1mW Dual Rejustor™ Micro-Resistor MBD-472-AL The Rejustor is a precision, electrically-adjustable resistor from Microbridge. The Rejustor can be adjusted to a precision of 0.1%, or better. The Rejustor can be re-adjusted many times bidirectionally within the active range using standard hardware and LabVIEW-based Rejust-it calibration software. Low-power Rejustors are suitable for applications where the total power dissipation (in the pair) does not exceed 1mW. As a passive device, there is no warm-up period or boot-up time. Each Rejustor is independently adjustable to any value in the 30% adjustment range while still offering excellent TCR. They are nonvolatile, maintaining their adjusted value indefinitely. Each Low-TCR Rejustor maintains 0ppm/K TCR across the adjustment range within ±100ppm/K. Relative TCR between both Rejustors is less than ±50ppm/K. PARAMETER Resistance (as-manufactured) Minimum adjustable resistance Adjustment Precision TCR (per Rejustor) Power dissipation (per Rejustor) SPECIFICATION 4.7KΩ 3.3KΩ 1 0.1% or 0.01% 0±100ppm/K 0.5mW BENEFITS Precision electrical in-circuit adjustment Externally adjust or calibrate parameters on circuits or sensors at final assembly Adjustment process isolated from circuit allows true in-circuit calibration Single chip solution to calibrate voltages, currents, offsets, gains, etc. No mechanical moving parts – suitable for vibration sensitive applications Improved reliability; dependability; dust and moisture resistance over mechanical parts Dynamic adjustment provides cost and labor savings Flexibility reduces rework cost ELECTRICALLY ADJUSTABLE 4.7KΩ Ω 1:1 RESISTOR PAIR R1 R1ADJ R2 e e R2ADJ HGND R1 R2 Figure 1: Functional Block Diagram FEATURES Electrically adjustable 4.7KΩ 1:1 dual resistor Passive, non-volatile variable resistor Adjustment range: 30% down from asmanufactured resistance Bi-directional adjustment within active range Long term stability 0.5%, see Table 5 Flexibility: Potential for multiple adjustments Stable Temperature Coefficient as resistance is adjusted – TCR: 0±100ppm/K Power Rating up to 1.0mW at 70oC Suitable for operation from -40 to +125oC, refer to Table 2 Passive device, requires no power to operate or maintain adjustment Easy to adjust with Rejust-it software and external DAC/ADC hardware Typical adjust times: ~ 1sec1. APPLICATIONS Anywhere precision adjustment is required Gain and offset adjustment Reference voltage or current adjustment Precision Voltage Regulator adjustment Filter tuning RF Amplifier biasing Opto-electronics Frequency Control devices Mechanical or digital potentiometer replacement Suitable for high-frequency applications 1 Adjustment precision is limited by temperature control, accuracy of measurement and adjustment equipment and may increase adjustment time Information furnished by Microbridge Technologies is believed to be accurate and reliable. However, no responsibility is assumed by Microbridge Technologies for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Microbridge Technologies. Trademarks and registered trademarks are the property of their respective companies. Rev. 1.2 © 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 July 19, 2007 MBD-472-AL www.microbridgetech.com PIN CONFIGURATION PIN FUNCTIONAL DESCRIPTION NC NC NC NC Table 1: Pin Function Descriptions R1ADJ R1 121S 111R ZZZZ R1 R2 R2 R2ADJ Mnemonic Description 16-Pin QFN Pin No. Rejustor 1 Terminal 1 R1 Rejustor 1 Terminal 2 NC R2 Rejustor 2 Terminal 3 R2 Rejustor 2 Terminal 4 HGND Heater Ground 10 R2ADJ Rejustor 2 Adjust Input 11 NC NC NC NC R1 HGND Figure 3: Pin Configuration, 16-pin QFN package (3x3mm) R1ADJ NC Rejustor 1 Adjust Input No Connect 12 5, 6, 7, 8, 9, 13, 14, 15, 16 GENERAL OVERVIEW The Microbridge Technologies Low TCR dual Rejustor family of electrically adjustable micro-resistors can be adjusted and matched to resistance values for precision control of sensors, voltage regulators, amplifiers and other applications. Rejustors are passive, non-volatile devices capable of being readjusted many times to very-high precision, bi-directionally; using only integrated circuit level electrical signals. Each Rejustor is independently adjustable to any ohmic value within a continuous range from the as-manufactured resistance to at least 70% of the as-manufactured value. Rejustors are a major improvement over thin-film laser trim and fusible link technologies at the wafer and chip level; as well as manual trim pots, digital potentiometers and thick-film laser trim at the hybrid and board level. Rejustors can be adjusted in-circuit to match any desired output condition using standard test equipment. Once adjusted, Rejustors maintain their precision indefinitely. Unlike laser trimming, the Rejustor can be adjusted up or down within the active adjustment range to facilitate rework or to enhance precision, for example, Rejustors can be used to iterate towards a final value. The Rejustor does not require active power. It is electrically isolated from both substrate and heater and can therefore float, electrically. Operation of the Rejustor die has been confirmed well beyond 100MHz. High-frequency performance of a packaged Rejustor is limited by the capacitance and inductance of the package. Rejustors can be adjusted using the low-cost MBK-408 Rejustor Calibration Tool from Microbridge or National Instruments based system or other suitable electronic test equipment. The adjustment process is controlled with Rejust-it software, which is based on LabVIEW and available as executable for a standard Windows-based PC. Available in16-pin QFN packages, Rejustors are RoHS and Pb-free and green compliant. Rev. 1.2 © 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 2 July 19, 2007 MBD-472-AL www.microbridgetech.com Table 2: RATINGS – Rejustor R1 and R2 (4.7KΩ Ω) Rejustors 0°C < TA < +70°C; unless otherwise noted. Item Nominal Resistance R1 R1 Maximum Power Nominal Resistance R2 R2 Maximum Power Operating Temperature Isolation Voltage (between any pins) Total Resistance Tolerance Nominal Adjustment range Nominal Pair Matching Conditions Typical Specifications 4,700Ω 0.5mW 4,700Ω 0.5mW As specified in this datasheet As specified in Application Note “Rejustor Operating Guidelines for -40 to +125C Operation” o Beyond -40 to +125 C Subject to power limits 0°C to +70°C o -40 to +125 C Contact Microbridge 25V As-manufactured resistance is ±10% from nominal +0 to -30% from as-manufactured Unadjusted ±2% Table 3: TCR CHARACTERISTICS – Rejustors Characteristics Specification Test Method or Conditions (Worst Case) Temperature Coefficient Unadjusted Adjusted Change in Temperature Coefficient Temperature Coefficient Matching of pairs Rejustor Self-heating Coefficient of Resistance Relative Self-heating Coefficient of Resistance 0±100ppm/K 0±100ppm/K ± 50ppm/K ± 10ppm/K +4800 ppm/mW ±20% ±100 ppm/mW TCR change in adjusted device relative to unadjusted device, by analysis Adjusted to match resistance, by analysis Per Rejustor, unadjusted When both Rejustors carry the same current Table 4: PACKAGE ELECTRICAL CHARACTERISTICS Characteristics QFN Capacitive Loading QFN Mutual Capacitance Table 5: RELIABILITY DATA Characteristics Thermal Shock/ Cycling Overload Specification (Typical) 0.7pF 0.1pF Limit 2 + 0.5% 2 + 0.5% Test Method or Conditions Per package pin, by analysis at 100MHz By analysis at 100MHz Test Method or Conditions o o JESD22-A104, -65 C to 125 C, 1000 cycles at 2 cycles/hour MIL-R-55342H Par 4.8.6 (Rated Voltage x2.5, 5sec.), Rated voltage based on 1mW maximum power High Temperature Exposure (long-term stability) Humidity and Moisture Resistance Operational Life Test Shock Vibration, High Frequency V = PR 2 JESD22-A103 150 C, 1000hrs o JESD22-A101, 85% RH, 85 C, 1000hrs 2 JESD22-A108, 125 C, 1000 hrs., static operation at rated power 500G, 1ms duration, X,Y,Z axes each 5 shocks Max acceleration 20G, 20~2000~20Hz, 8 min, X,Y,Z each 4 sweeps + 0.5% 2 + 0.8% + 0.5% ± 0.1% ± 0.1% o o 2 Where indicated, drift specifications refer to resistance drift in the positive direction. Best performance is achieved at adjustments larger than 10% down from the as-manufactured resistance. Rev. 1.2 © 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 3 July 19, 2007 MBD-472-AL www.microbridgetech.com Table 6: MANUFACTURABILITY DATA Characteristics Test Method or Conditions ESD Discharge Solder ability JESD22-A114, human body model weakest pin pair, all lead combinations. Class 1A o º JESD22-A113, 235 C, slope 6 C/second PACKAGING OPTIONS Table 7: NOMINAL PACKAGE DIMENSIONS Type QFN Lead Count 16 Body Width 3.0mm Body Length 3.0mm Lead Pitch 0.5mm Lead Width 0.25mm 0.85 Lead Length 0.4mm Body Thickness 0.85mm JEDEC/ EIAJ MO-220 (VEED) 0.2 ref. QFN-16 SIDE VIEW 0.4 0.25 3.0 0.5 0.625 Nom. 3.0 All dimensions in millimeters QFN-16 BOTTOM VIEW Figure 4: Package Dimensions TAPE CARRIER PACKAGING 330mm 8.0mm 12mm The tape in the reel contains 400mm Leaders and Trailers where products are not packed. End user direction feed Figure 5: Tape Carrier Dimensions Rev. 1.2 © 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 4 July 19, 2007 MBD-472-AL www.microbridgetech.com Table 8: ORDERING INFORMATION Part Number MBD-472-AL Order Code 111R Package QFN-16 3 Part Marking 111R-ZZZZ Delivery Tape and Reel Quantity 4 3000 NOMINAL VALUES AVAILABLE The following additional Micro Power Dual Rejustors are available with similar performance specifications. Consult the individual datasheet for more information. Part Number MBD-472-AL MBD-472-CL MBD-902-AL MBD-902-CL MBD-902-XL MBD-153-AL MBD-153-KL MBD-333-AL Resistance R1 Value (Ω Ω) 4700 4700 9,000 9,000 9,000 15,000 15,000 33,000 Resistance R2 Value (Ω Ω) 4700 24,500 9,000 45,000 63,000 15,000 45,000 33,000 Ratio 1:1 1:5 1:1 1:5 1:7 1:1 1:3 1:1 QFN Order Code 111R 1121 111T 1127 111X 111Y 111U 111Z Please check with Microbridge Technologies Inc prior to design to ensure you have the latest revision of the datasheet for this part 3 4 Where ZZZZ represents the 4-digit date code Smaller sample quantities available on tape Rev. 1.2 © 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 5 July 19, 2007