MODEL BCN31 BCN31 Series · R/2R Ladder Network · 8 Bit, 2512 Size · Thick Film · Leadless Chip Packages Features 8 bit ladder network in a 10 terminal leadless chip package Convex termination with square edges and corners Topside marking for easy identification Solder plated termination with nickel barrier · · · · Benefits Saves board space Reduces cost Single component reliability Leadless package offers improved performance · · · · Applications Termination network in analog to digital and digital to analog conversion circuits · Electrical 1 Standard Resistance Range, Ohms 1K to 100K Standard Resistance Tolerance ±2% Operating Temperature Range -40°C to +125°C Temperature Coefficient of Resistance ±100ppm/°C Operating Voltage, Maximum 50Vdc or √pr Insulation Resistance Power Rating, Watts at 70°C Ladder Network Accuracy 100 Megohms 25mW per Resistor / 400mW per Package 8 Bits: ±1/2LSB 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 04.12 MODEL BCN31 BCN31 Series Environmental 1,000 hours at +40°C, 95% R.H. (3.0% ΔR) Moisture Resistance 1,000 hours at 70°C (3.0% ΔR) High Temperature Operation Short Time Overload 2.5 x rated voltage, 5 seconds (2.0% ΔR) Temperature Cycling -55°C to +125°C, 5 cycles (1.0% ΔR) 260°C for 10 seconds (1.0% ΔR) Resistance to Solder Heat 1,000 hours at 70°C (3.0% ΔR) Load Life Schematic 10 9 8 2R R 2R R R 2R 1 7 R 2R R 2R R 2R 2 6 2R R 2R 3 4 2R 5 Solder Pad Layout (Inch/mm) P Y A B Y X X C Wave Solder Process Re-Flow Solder Process P A B C X Y A B C X Y .050 .084 .148 .014 .036 .032 .084 .148 .014 .036 .032 1.27 2.10 3.70 0.35 0.90 0.80 2.10 3.70 0.35 0.90 0.80 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 04.12 MODEL BCN31 BCN31 Series Outline Dimensions (Inch/mm) .252±.008 6.4±0.20 Solder Termination .012±.006 0.30±0.15 L 253 .050±.002 1.27±.051 .012±.004 0.30±0.10 .122±.008 3.10±0.20 .022±.004 0.55±.10 .032±.004 0.80±0.10 Power Derating Curve Percent of Rated Power 100 80 60 40 20 0 -55 70 0 125 Ambient Temperature (˚ C) Standard Resistance Values, Ohms Value (R1/R2) 1K/2K 10K/20K 25K/50K 50K/100K 100K/200K 102 103 253 503 104 Code Ordering Information BCN 31 AB Model Series Width: 31 = 3.1mm Edge Option: AB = Square Edge, Convex Termination Circuit Type: L = Ladder L XXX G 7 LF LF: RoHS compliant Packaging Option: 7 = 7" Tape & Reel, 4K/Reel 13 = 13" Tape & Reel, 16K/Reel Tolerance: G = ±2% Resistance Code: 102 = 1K / 2K 103 = 10K / 20K 253 = 25K / 50K 503 = 50K / 100K 104 = 100K / 200K 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 04.12