CTA Vishay Electro-Films CHIP RESISTORS Thin Film, Center-Tapped Resistor FEATURES * Wire bondable * Center tap feature Product may not be to scale * Tight ratio tolerances to: 0.1 % * Chip size: 0.030 inches square The CTA series resistor chips combine the best tolerances, stability and low shunt capacitance. The CTA offers the designer flexibility in use as either a single value resistor or as two resistors with a center tap feature. The CTAs six bonding pads allows the user increased layout flexibility. The CTAs are manufactured using Vishay Electro-Films (EFI) sophisticated thin film equipment and manufacturing technology. The CTAs are 100 % electrically tested and visually inspected to MIL-STD-883. * Resistance range total: 25 to 35 k * Alumina substrate, low shunt capacitance: < 0.2 pF * Resistor material nichrome * Excellent stability: 0.025 % maximum R/R APPLICATIONS I The CTA center-tapped resistor chips are used mainly in feedback circuits of amplifiers where ratio matching, low shunt capacitance and tracking between two resistors is critical. Recommended for hermetic environments where chip is not exposed to moisture. For lower values, the resistance of the six bonding-pad configurations can vary, depending on the method of measurement used. Vishay EFI measures low-value resistors by the four-wire Kelvin technique. The measuring method is illustrated in the diagram to the right. I RA V I RB V V TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES Tightest Standard Tolerance Available PROCESS CODE 0.1 % 10 ppm/C 25 ppm/C 50 ppm/C 100 ppm/C 25 100 200 1 k CLASS H* CLASS K* 203 233 202 232 200 230 201 231 *MIL-PRF-38534 inspection criteria 20 k 35 k STANDARD ELECTRICAL SPECIFICATIONS PARAMETER TCR Tracking Between Halves (RA/RB) Center Tap Ratio, RA/RB: Tolerance Noise, MIL-STD-202, Method 308 Moisture Resistance, MIL-STD-202, Method 106, (Passivated only) Stability, 1000 h, + 125 C, 62 mW Operating Temperature Range Thermal Shock, MIL-STD-202, Method 107, Test Condition F High Temperature Exposure, + 150 C, 100 h Insulation Resistance Operating Voltage DC Power Rating at + 70 C (Derated to Zero at + 150 C) 5 x Rated Power Short-Time Overload, + 25 C, 5 s 2 ppm/C* 1 1 % standard - 35 dB typ. 0.5 % max. R/R 0.025 % max. R/R - 55 C to + 125 C 0.1 % max. R/R 0.1 % max. R/R 1012 min. 100 V max. 125 mW 0.25 % max. R/R % *10ppm/C for R < 100 www.vishay.com 68 For technical questions, contact: efi@vishay.com Document Number: 61015 Revision: 12-Mar-08 CTA Thin Film, Center-Tapped Resistor Vishay Electro-Films CHIP RESISTORS DIMENSIONS in inches 0.030 0.030 STANDARD CONFIGURATION *Six locations. All pads 0.005 x 0.005 0.005 SCHEMATIC RT = RA + R B RA RB MECHANICAL SPECIFICATIONS in inches PARAMETER Chip Size 0.030 x 0.030 0.002 (0.762 x 0.762 0.050 mm) Chip Thickness 0.010 0.002 (0.254 0.05 mm) Chip Substrate Material 99.6 % alumina Resistor Material Nichrome Bonding Pad Size 0.005 x 0.005 (0.127 x 0.127 mm) Number of Pads 6 Pad Material 25 kA minimum gold Backing Options: None Aluminum bonding pads, 10 kA minimum Center-tap ratio tolerances to 0.02 % R > 1 k Consult Applications Engineer ORDERING INFORMATION Example: 100% visual, 10 k, 1 %, 100 ppm/C TCR, gold pads, class H visual inspection W INSPECTION/ PACKAGING W = 100 % visually inspected parts in matrix trays per MIL-STD-883 X = Sample, visually inspected parts loaded in matrix trays (4 % AQL) www.vishay.com 69 CTA PRODUCT FAMILY 201 PROCESS CODE See Process Code table 1000 RESISTANCE VALUE Use first 4 digits significant digits of the resistance (RT) For technical questions, contact: efi@vishay.com 1 MULTIPLIER CODE B = 0.01 A = 0.1 0=1 1 = 10 F TOLERANCE CODE A = 0.05 % B = 0.1 % C = 0.2 % D = 0.5 % F = 1.0 % G = 2.0 % H = 2.5 % J = 5.0 % K = 10 % Document Number: 61015 Revision: 12-Mar-08 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1