MBD-902-AL JESD22-A104 MIL-R-55342H JESD22-A103 JESD22-A101 JESD22-A108

Adjustable 9K 6.3K Low-TCR RejustorTM The Rejustor is a precision-adjustable passive resistor enabling in-circuit,

MBD-902-AL MBD-902-AL Dual 1mW Adjustable 9K 6.3K Low-TCR RejustorTM The Rejustor is a precision-adjustable passive resistor enabling in-circuit, precision, analog calibration in a revolutionary way. Each Rejustor can be adjusted and fixed to 0.1% precision (or better) using electrical signals. The adjustment process provides precision control of the resistance of each resistor in the pair for set-on-test applications. ELECTRICALLY ADJUSTABLE 9.0K 1:1 RESISTOR PAIR R1 R1ADJ R2 e e Low-power Rejustors are suitable for applications where the total power dissipation (in the pair) does not exceed 1mW. Precision adjustment of the resistance of each Rejustor is accomplished by means of a proprietary procedure which semi-permanently adjusts the resistive poly-silicon element in a closed-loop system under control of Rejustor Calibration tools and Rejust-it software. The adjustment process is 1 typically complete within 1-2 seconds. Adjustment changes the physical properties of the resistors. No external memory or boot-up is required. The material is physically altered to have a new electrical response. After adjustment, the Rejustor is stable in the range from -55° to C +125° C. Resistance can be matched to within 0.1%, or better, of the target value. The Rejustor is ideal for gain setting, offset and bias adjustment, voltage adjustment and a variety of highprecision analog applications. The Rejustor features the lowest noise and the widest bandwidth of any adjustable resistor technology. Each Low-TCR Rejustor is temperature stable, maintaining 0ppm/K ±100ppm/K TCR across the adjustment range. Relative TCR between both Rejustors is ±10ppm/K. Rejustors are available in lead-free, RoHS and Green packages. The Rejustor is available in 16-pin QFN packages. BENEFITS Precision electrical in-circuit adjustment Externally adjust or calibrate parameters on circuits or sensors at final assembly Adjustment process isolated from circuit allowing true incircuit calibration Single chip solution to calibrate voltages, currents, offsets, gains, etc. No mechanical moving parts, ideal for vibration sensitive applications Improved reliability, dependability; dust and moisture resistance over mechanical parts Dynamic adjustment provides cost and labor savings Eliminates labor-intensive select-on-test adjustment Flexibility reduces rework cost Potential for multiple adjustments Lowest noise and widest bandwidth of any adjustable resistor technology In-circuit adjustment allows system calibration after encapsulation or packaging R2ADJ HGND R1 R2 Figure 1: Functional Block Diagram PARAMETER Resistance (as-manufactured) Minimum adjustable resistance Precision TCR (per Rejustor) Rated Power (per Rejustor) SPECIFICATION 9.0K 6.3K 1 0.1% or 0.01% 0±100ppm/K 0.5mW FEATURES Each Resistor is independently electrically adjustable to any value from its as-manufactured value down 30%, with accuracy 0.1% or better Bi-directional, continuous value adjustment within active range Long Term Stability 0.5%, see Table 5 Stable Temperature Coefficient as resistance is adjusted TCR: 0±100ppm/K o Suitable for operation from -55 to +125 C, refer to Table 2 Low noise: typ. -15dB Passive device requires no power during operation In-circuit adjustable at wafer, component, board or system level QFN 16-pin RoHS, Pb-free and Green packages APPLICATIONS Anywhere precision calibration is required Gain control and offset adjustment Reference voltage and current adjustment Precision Voltage Regulator calibration 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 Rejustor is a registered trademark of Microbridge Technologies 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. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com Table 2: RATINGS Rejustors 0°C < TA < +70°C and rated power; unless otherwise noted. Item Maximum Power Nominal Resistance R1 Conditions Typical Specifications 5 times rated power 90,000 0.5mW R1 Rated Power Nominal Resistance R2 R2 Rated Power Operating Temperature Isolation Voltage (between any pins) Rejustor Self-heating Coefficient of Resistance, R1 and R2 Relative Self-heating Coefficient of Resistance Total Resistance Tolerance Nominal Adjustment range Nominal Pair Matching 90,000 0.5mW As specified in this datasheet As specified in Application Note "Rejustor Operating Guidelines for -55 to +125C Operation" o Beyond -55 to +125 C Subject to power limits 0°C to +70°C o -55 to +125 C Contact Microbridge 25V +4000 ppm/mW ±20% When both Rejustors carry the same current ±500 ppm/mW As-manufactured resistance is ±10% from nominal +0 to -30% from as-manufactured Unadjusted ±2% Table 3: TCR CHARACTERISTICS Rejustors 0°C < TA < +70°C and rated power; unless otherwise noted. Characteristics Temperature Coefficient Unadjusted Adjusted Change in Temperature Coefficient Temperature Coefficient Matching of pairs Specification (Worst Case) Test Method or Conditions 0±100ppm/K 0±100ppm/K ± 50ppm/K TCR change in adjusted device relative to unadjusted device, by analysis ± 10ppm/K Adjusted to match resistance, by analysis Table 4: PACKAGE ELECTRICAL CHARACTERISTICS Characteristics QFN Capacitive Loading QFN Mutual Capacitance Rev. 2.2 Specification (Typical) 0.7pF 0.1pF Test Method or Conditions Per package pin, by analysis at 100MHz By analysis at 100MHz © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 2 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com Table 5: RELIABILITY DATA Characteristics Thermal Shock/ Cycling Overload Limit 2 + 0.5% 2 + 0.5% Test Method or Conditions o based on rated power V = High Temperature Exposure (long-term stability) Humidity and Moisture Resistance Operational Life Test Shock Vibration, High Frequency o JESD22-A104 JESD22-A104, -65 C to 125 C, 1000 cycles at 2 cycles/hour MIL-R-55342H MIL-R-55342H Par 4.8.6 (Rated Voltage x2.5, 5sec.), Rated voltage PR 2 JESD22-A103 JESD22-A103 150 C, 1000hrs o JESD22-A101 JESD22-A101, 85% RH, 85 C, 1000hrs 2 JESD22-A108 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 Table 6: MANUFACTURABILITY DATA Characteristics Test Method or Conditions ESD Discharge Solder ability JESD22-A114 JESD22-A114, human body model weakest pin pair, all lead combinations. Class 1A J-STD-020C J-STD-020C, MSL1, 260ºC convection reflow for QFN-16 QFN-16 packages 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 Lead Length 0.4mm Body Thickness 0.85mm JEDEC/ EIAJ MO-220 MO-220 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. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 3 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com APPLICATION EXAMPLES Vin V+ Output Vin Vout LM317 LM317 C1 - Rj1 Vout + Adj Rj2 Figure 4: Adjustable Photo-Detector Figure 2: Voltage Regulator Application Circuit V+ Rf Vin Rin Vout + Figure 5: Sensor Offset Correction Figure 3: Basic Op Amp Application FUNCTIONAL DESCRIPTION Microbridge Rejustors represent a technology revolution in resistive adjustment for precision electronic systems. Each Rejustor in the dual package provides independent, precision adjustment of resistance in a continuous range for in-circuit, set-on-test adjustment of a wide variety of analog electronic circuits and systems. Rejustors are adjusted in-circuit to meet the precision requirements of the application. For example, the Rejustor can be adjusted to provide an output voltage (Figure 2) or adjust a gain setting (Figure 3). In all cases, the exact resistance value of the Rejustor is less important than the desired output parameters of the circuit being adjusted. The Rejustor is the only purepassive resistive element that can be adjusted at final assembly, using only electrical signals. Furthermore, unlike lasertrimmed resistors, Rejustors can be adjusted bi-directionally. Rejustors are adjusted using Rejustor Calibration Tools, such as the MBK-408A MBK-408A Low cost, high-precision Rejustor Calibration tool. Rejustors can also be adjusted with a high-volume, high-precision Calibration tool based on the National Instruments NI-DAQ chassis. 3 During the calibration process, the Rejustor is connected to the Rejustor Calibration Tool, or equivalent hardware . The Calibration tool provides the electrical connections to monitor the circuit output behavior and drive power into the Adjustment pins of the Rejustor. Power applied to the Adjustment pins controls the heating and cooling process which in-turn changes the resistance. Refer to Figure 6 for a sample connection between the MBK-408A MBK-408A Rejustor Calibration tool and the Rejustor. This connection to the calibration tool is only required during the adjustment step. 3 Using Microbridge's scalable production-calibration hardware (based on the NI-DAQ platform from National Instruments) and Rejust-it software, multiple units can be calibrated simultaneously during roughly the same amount of time for high-volume applications. Rev. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 4 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com Vin DAC1 CH4 PC USB 25 5 DAC3 HGND GND MBK-408A MBK-408A Rejustor Calibration Tool e 18 TO USER CIRCUIT e 1 3 Test Points And/or Flying Leads Circuit Board Figure 6: Rejustor Hardware Connection Rejust-it software, provided as part of the Rejustor Calibration Tool is a LabVIEW-based executable that controls the adjustment process using the Rejustor Calibration Tool in a closed-loop feedback system. Rejustors are automatically adjusted to the target values, as specified in the graphical user interface. A sequence of electrical heating pulses, governed by Microbridge's proprietary algorithms, is enough to fine-tune the material properties within approximately 1 second for most applications. After adjustment, the circuit is disconnected from the Rejustor Calibration tool. The Rejustor does not require active power to maintain its adjusted resistance. The material properties of the Rejustor are altered to affect the current flow, which means the resistance is changed. Rejustors are intended for set-and-forget applications that involve factory calibration. The devices can be adjusted dozens-of-times, as may be required for periodic maintenance or calibration. The resistive element of the Rejustor is electrically isolated from both substrate and Adjust (heater) pins and can therefore float, electrically. Adjusted Rejustors are highly stable and retain their electrical and temperature performance characteristics indefinitely. Rejustors can be adjusted many times, bi-directionally without compromising stability or performance. Rejustors also feature the lowest noise and the widest bandwidth of any adjustable resistor technology. Microbridge Rejustors are an electrical replacement for mechanical compensation techniques. They replace manual trim pots, digital pots and laser trimming. The Microbridge Technologies Low-TCR Rejustor family of electrically adjustable microresistors can be matched to values for precision control of sensors, voltage regulators, amplifiers and other applications. Rev. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 5 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com PIN FUNCTIONAL DESCRIPTION PIN CONFIGURATION NC NC NC NC NC NC Table 8: Pin Function Descriptions R1ADJ R1 121S 111T ZZZZ R1 Mnemonic R2ADJ Description 16-Pin QFN Pin No. R1 Rejustor 1 Terminal 2 R2 Rejustor 2 Terminal 3 R2 Rejustor 2 Terminal 4 Heater Ground 10 R2ADJ Rejustor 2 Adjust Input 11 R1ADJ Rejustor 1 Adjust Input 12 NC NC NC NC NC NC 1 HGND HGND R2 Rejustor 1 Terminal NC R2 R1 Figure 7: Pin Configuration, 16-pin QFN package (3x3mm) NC 0.85 No Connect 5, 6, 7, 8, 9, 13, 14, 15, 16 0.2 ref. QFN-16 QFN-16 SIDE VIEW 0.4 0.25 3.0 0.5 3.0 0.625 Nom. All dimensions in millimeters QFN-16 QFN-16 BOTTOM VIEW Figure 8: Package Dimensions Rev. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 6 January 7, 2008 MBD-902-AL MBD-902-AL www.microbridgetech.com TAPE CARRIER PACKAGING 8.0mm 330mm 12mm The tape in the reel contains 400mm Leaders and Trailers where products are not packed. End user direction feed Figure 9: Tape Carrier Dimensions Table 9: ORDERING INFORMATION Part Number MBD-902-AL MBD-902-AL Order Code 111T Package QFN-16 QFN-16 4 Part Marking 111T-ZZZZ 111T-ZZZZ Delivery Tape and Reel Quantity 5 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-AL MBD-472-CL MBD-472-CL MBD-902-AL MBD-902-AL MBD-902-CL MBD-902-CL MBD-902-XL MBD-902-XL MBD-153-AL MBD-153-AL MBD-153-KL MBD-153-KL MBD-333-AL MBD-333-AL Resistance R1 Value () 4700 4700 9,000 9,000 9,000 15,000 15,000 33,000 Resistance R2 Value () 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 4 5 Where ZZZZ represents the 4-digit date code Smaller sample quantities available on tape Rev. 2.2 © 2008 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: 514-938-8089 Fax: 514-938-9089 7 January 7, 2008