CLC5506PCASM

OBSOLETE User's Guide SNOA077B – August 1999 – Revised April 2013 AN–1138 CLC5506 Evaluation Board 1 Basic Description The CLC5506PCASM is a fully assembled and tested evaluation module for CLC5506 Gain Trim Amplifier (GTA). The evaluation module simplifies the task of making frequency response and noise figure performance evaluation of the CLC5506 gain trim amplifier. The evaluation circuit is carefully designed and laid out on an FR4 printed circuit board (PCB) (part number: CLC730102). For the schematic diagram of the CLC5506PCASM, see Figure 1. Centronics is a trademark of dcl_owner. All other trademarks are the property of their respective owners. SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated AN–1138 CLC5506 Evaluation Board 1 OBSOLETE Basic Description www.ti.com Figure 1. CLC5506PCASM Schematic Diagram The differential input impedance of CLC5506 between pins IN+ and IN− is 200Ω. The differential output impedance between pins OUT+ and OUT− is set to 200Ω by resistor R2. Two 4:1 impedance ratio transformers (T1 and T2) are used for wide band matching to a single ended 50Ω system to simplify evaluation. The 3.3µH inductor at L1 and L2 are used as RF chokes for the open collector outputs. Resistor R1 and VCCD is used to reduce noise cross-talk between the VCCA and VCCD. The low pass RC networks (R3, R4, R5 and C14, C15, C16) at LE, Clock and Data In pins are used to reduce AC feedthrough to the RF circuitry. Windows-95/98/NT GTA control software, developed by Texas Instruments can be used to send control data to the CLC5506 Gain Trim Amplifier. This software along with the CLC5506 Gain Trim Amplifier (GTA) Data Sheet (SNOS456) can be downloaded from Texas Instruments web site at http://www.ti.com. 2 AN–1138 CLC5506 Evaluation Board SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated OBSOLETE Basic Description www.ti.com Figure 2 shows the typical test setup block diagram for the measurement of frequency response parameters. Figure 2. Test Setup Block Diagram for Frequency Response Measurement Figure 3 shows the typical test setup block diagram for the measurement of noise figure parameter. A RF noise source was used. During the noise figure measurement, the Centronics™ printer cable connected to P1 should be disconnected from the evaluation module and removed from the measurement area to reduce PC EMI noise pick-up. Figure 3. Test Setup Block Diagram for Noise Figure Measurement SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated AN–1138 CLC5506 Evaluation Board 3 OBSOLETE Basic Description www.ti.com RF transformers T1 and T2 have intrinsic losses, the actual RF performance of the CLC5506 per se, could be calculated by accounting for T1 and T2 losses in the evaluation module. For correction factor for gain measurement and noise figure measurement based on typical losses measured on the transformers specified in Table 2, see Table 1. Table 1. Gain and Noise Figure Correction Factor 4 Frequency (MHz) Gain Measurement Correction Factor (dB) Noise Figure Measurement Correction Factor (dB) 50 1.6 0.8 60 1.6 0.8 70 1.6 0.8 80 1.7 0.85 90 1.7 0.85 100 1.7 0.85 110 1.7 0.85 120 1.8 0.9 130 1.8 0.9 140 1.8 0.9 150 1.8 0.9 160 1.8 0.9 170 1.8 0.9 180 1.9 0.95 190 1.9 1.9 200 1.9 1.9 210 1.9 0.95 220 2.0 1.0 230 2.0 1.0 240 2.0 1.0 250 2.0 1.0 260 2.1 1.05 270 2.1 1.05 280 2.2 1.1 290 2.2 1.1 300 2.2 1.1 310 2.2 1.1 320 2.3 1.15 330 2.3 1.15 340 2.3 1.15 350 2.4 1.2 360 2.4 1.2 370 2.5 1.25 380 2.5 1.25 390 2.5 1.25 400 2.5 1.25 500 3.8 1.9 600 4.4 2.2 AN–1138 CLC5506 Evaluation Board SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated OBSOLETE Basic Description www.ti.com Table 2. Bill of Materials for CLC5506PCASM Qty Reference Description Part No or Note Distributor 2 T1,2 Transformer Mini-Circuits TC4-1W Mini-Circuits 1 P1 Connector Norcomp, TT57-LE40360 DigiKey/ 1036RF-ND 2 J1,2 SMA connector Femal Right Angle PCB Mount DigiKey/ ARFX1232-ND 3 C4,8 Cap, 100pF, 5% 0805 SMD package Generic 4 C6,7,10,11 Cap, 1000pF, 10% 1206 SMD package Generic 6 C5,9,14,15,16 Cap, 0.1µF, 20% 0805 SMD Package Generic 1 C1 Cap, 6.8µF, Tant., 16V 3528 SMD package Generic 4 R1.3,4,5 Res 1K, 5%, 1/8W 1206 SMD Package Generic 1 R2 REs, 200, 5%, 1/8W 1206 SMD Package Generic 2 L1,2 Inductor, 3.3µH 1008 SMD Package CoilCraft 2 VCC, GND Single Header 0.1" header Generic 1 1 U1 CLC5506IM PCB 14-PIN SOIC CLC730102 Texas Instruments For insertion gain measurement of the frequency response, the correction factor is the total insertion loss of T1 and T2. This correction factor shall be added back to the insertion gain reading of network analyzer to get the actual gain performance of CLC5506. For the noise figure measurement, the correction factor is the insertion loss of T1 (or half the total loss of T1 and T2). This correction factor shall be deducted from the noise figure reading of noise figure meter. Figure 4 and Figure 5 on the following page, illustrate the top and bottom side layout of the CLC730102. Figure 6, also on the following page, is the assembly drawing of CLC5506PCASM. Figure 4. CLC730102 (Top Side) SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated AN–1138 CLC5506 Evaluation Board 5 OBSOLETE Basic Description www.ti.com Figure 5. CLC730102 PCB (Bottom Side) Figure 6. CLC5506PCASM Component Layout (Top Side) In order to achieve the same performance as specified in the CLC5506 Gain Trim Amplifier (GTA) Data Sheet (SNOS456), components should be chosen from the bill of material attached and installed per Figure 6. NOTE: The circuits included in this application report have been tested with Texas Instruments parts that may have been obsoleted and/or replaced with newer products. To find the appropriate replacement part for the obsolete device, see the CLC to LMH Conversion Table (SNOA428). 6 AN–1138 CLC5506 Evaluation Board SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated OBSOLETE References www.ti.com 2 References • • CLC5506 Gain Trim Amplifier (GTA) Data Sheet (SNOS456) CLC to LMH Conversion Table (SNOA428) SNOA077B – August 1999 – Revised April 2013 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated AN–1138 CLC5506 Evaluation Board 7 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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