Thin Film Resistor Network Model 144 -TBA1 · · · · Custom circuits Thin film resistor network Hermetically sealed packages RoHS compliant available Applications Instrumentation amplifiers Precision voltage dividers Measurement bridge circuitry Converter applications Precision analog circuits Ladder networks · · · · · · Specifications BI Technologies provides custom thin film resistor networks. The networks can include uncommon values, tolerances and interconnections between resistors. Custom thin film resistor networks offer many advantages. Starting with the choice of resistance values, design engineers can mix and match resistor values according to application needs. Ratio tolerances and TCR tracking between resistors are superior to alternative technologies including foil resistors. With up to twenty five resistors, our 144 series networks are housed in hermetically sealed packages. These packages offer several advantages compared with their plastic counter parts. Advantages include higher operating temperature range, inert atmosphere for thin film element and means for removing package generated electrical offsets allowing for tighter resistance tolerances. We offer surface and through hole PCB mounting. These high reliability packages allow users a convenient means for incorporating these custom networks into circuits and products that will operate in extreme environments. Schematics for these networks are usually limited by package terminal count only. These networks are ideal for use in critical and demanding applications. Our networks are tested to industrial and military test requirements associated with high performance resistors. Features Precision nichrome resistors Passivation coating provides protection in humid environments Hermetic packaging (DIP and flat packs) HTCC side brazed and metal cases Network schematic Ratio tolerances TCR tracking tolerances Customer specific < ± 0.01% < ± 1 ppm/°C Note: 1. Part numbers are assigned by factory. General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 08.12 Thin Film Resistor Network Model 144 -TBA Electrical2 Resistance range, ohms 10 to 3M Greatest resistance ratio range (RA/RB) 1 to 1000 Resistor tolerances ± 0.025% Ratio tolerances TCR TCR tracking between resistors Operating temperature range Inter-lead capacitance Insulation resistance Maximum operating voltage Noise, maximum (MIL-STD-202, Method 308) Resistor power rating at 70°C ± 0.01% ± 25 ppm/°C ± 1 ppm/°C -55°C to +175°C < 2 pF ≥ 10,000 megohms 100 Vdc or √PR -25 dB 0.1 watts Environmental (MIL-R-83401) Thermal shock plus power conditioning ΔR 0.25% Short time overload ΔR 0.1% Terminal strength ΔR 0.1% Moisture resistance ΔR 0.2% Mechanical Shock ΔR 0.25% Vibration ΔR 0.25% Low temperature operation ΔR 0.05% High temperature exposure ΔR 0.1% Resistance to solder heat ΔR 0.1% Marking permanency Flammability Storage temperature range Per MIL-STD-202, method 215 UL-94V-0 rated -55°C to +125°C Mechanical Terminal count Terminal plating Terminal material Terminal co-planarity Substrate material Resistor material Body material 3 to 28 Gold plated over electrolytic nickel Alloy 42, Alloy F15 0.004” (0.1 mm) Ceramic Passivated Nichrome HTCC or Metal 2. Specifications subject to change without notice. General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 08.12 Thin Film Resistor Network Model 144 -TBA Power Derating Curve Percentage of rate power 120 100 80 60 40 20 0 0 25 70 125 150 175 Ambient temperature (C) Packaging Bulk Tubes, Cartons Recommendations Specify ratio matches in multiple groups rather than one large group Use lowest resistor value within ratio group as reference resistor Limit total network resistance value to less than 3 megohms TCR tracking of +/-1 ppm/C is available for resistors with near equal values. Optional Lot Acceptance Testing Serialized units with corresponding attributes or variables data Screening per Mil-Std-883 Group A and B testing per Mil-PRF-83401 Full qualification testing per Mil-PRF-83401 Ordering Information 144 - TBA Custom hermetically sealed resistor network Factory assigned sequential number General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 08.12 Thin Film Resistor Network Model 144 -TBA Schematics 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Network Parameters Reference Designator Resistance Value (ohms) Absolute Tolerance (%) Ratio Tolerance (%) Reference Resistor Absolute TCR (ppm/°C) TCR Tracking (ppm/°C) Power (mWatts) R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 08.12