SD394EVK/NOPB

SD394EVK National Semiconductor EVK User Manual LMH0394 Evaluation Board User Guide October 14, 2010 Overview The SD394 Evaluation Kit (EVK) enables evaluation of the LMH0394 3G/HD/SD SDI Adaptive Cable Equalizer. Evaluation Kit Contents The EVK contains the following parts: • SD394EVK board assembly with the LMH0394 cable equalizer • SD394EVK User Guide Evaluation Board Description Figure 1 shows the SD394 evaluation board and highlights some of its features. FIGURE 1. SD394 Evaluation Board SD394 EVK User Guide Rev 1.2 1 of 8 © 2010, National Semiconductor Corp. SDI Input and SDO Output The SDI input connector (J1) is a 75Ω BNC connector. The SDI input should conform to the SMPTE 424M, SMPTE 292M, or SMPTE 259M standards. The SDO output connectors (J2 and J3) are 50Ω SMA connectors. The SDO output connectors have onboard 4.7uF AC coupling capacitors (C3 and C7). When using only one side of the output pair, the other side should be terminated with a 50Ω SMA termination. For example, when only using the SDO output, ¯¯¯¯ SDO should be terminated with a 50Ω SMA termination. DC Power Connectors The VCC and GND power connectors, PS1 and PS2 respectively, should be powered with a DC input voltage of 2.5V ± 5%. SPI Mode / Pin Mode Select (JP6 – JP9) JP6, JP7, JP8, and JP9 are used to select between SPI Mode or Pin Mode. To select Pin Mode, set these jumpers in the down position as shown in Figure 2. To select SPI Mode, set these jumpers in the up position as shown in Figure 3. For proper operation, either Pin Mode or SPI Mode must be selected. Do not leave JP6-JP9 open. FIGURE 2. Pin Mode Select FIGURE 3. SPI Mode Select MUTEREF (JP5) JP5 allows control of the MUTEREF function and may be used in either Pin Mode or SPI Mode. MUTEREF is an input voltage used to set the threshold for ¯¯¯ CD . The MUTEREF DC input voltage should be between 0V and 2.5V. Refer to the LMH0394 datasheet for details. Leave JP5 unconnected for normal operation. Pin Mode Controls (JP2 – JP4) JP2, JP3, and JP4 are used to control the ¯¯¯ CD and Mute, Bypass, and Auto Sleep functions while the device is configured in Pin Mode. Do not place jumpers on JP2, JP3, or JP4 while the device is configured for SPI Mode. ¯¯¯ CD and MUTE (JP2) ¯¯¯ ) monitoring and MUTE control. ¯¯¯ JP2 allows Carrier Detect (CD CD is high when no input signal is present. MUTE may be used to force the outputs on or off, or tied to ¯¯¯ CD to allow automatic mute operation if the SDI signal is not present. To activate mute and force the outputs into a muted condition, set the jumper to pull MUTE to VCC. To SD394 EVK User Guide Rev 1.2 2 of 8 © 2010, National Semiconductor Corp. turn off mute so that the outputs will never mute, set the jumper to tie MUTE to GND. For normal operation, set the jumper to tie ¯¯¯ CD to MUTE for automatic mute control. The MUTE pin has an internal pulldown (to disable mute), so JP2 may be left unconnected and the device will never mute. BYPASS (JP3) JP3 allows control of the equalization BYPASS function. To put the device into bypass mode, set the jumper to pull BYPASS to VCC. To turn off bypass (for normal operation) set the jumper to pull BYPASS to GND. The BYPASS pin has an internal pulldown (to disable bypass), so JP2 may be left unconnected for normal operation. AUTO SLEEP (JP4) JP4 allows control of the AUTO SLEEP function. To put the device into auto sleep mode in which it will power down when no input is detected, set the jumper to pull AUTO SLEEP to VCC. To turn off auto sleep and prevent the LMH0394 from automatically powering down, set the jumper to pull AUTO SLEEP to GND. The AUTO SLEEP pin has an internal pullup (to enable auto sleep), so JP4 may be left unconnected to enable auto sleep mode. SPI Header (JP1) JP1 is the SPI (Serial Peripheral Interface) header. It allows access to the SPI pins (¯¯¯ SS , MISO, MOSI, and SCK) while the LMH0394 is in SPI mode. These pins may be connected to a standard SPI controller to access the LMH0394 SPI registers. Refer to the LMH0394 datasheet for details. Carrier Detect LED (D1) D1 shows the status of Carrier Detect. This LED is GREEN when an input signal has been detected, and OFF when no input is detected. D1 shows the status of Carrier Detect while in Pin Mode or SPI Mode. SD394 EVK User Guide Rev 1.2 3 of 8 © 2010, National Semiconductor Corp. Typical Performance Equalizer Output Figures 4, 5, and 6 show output waveforms for the SD394 with various Belden 1694A cable lengths. The input signal is a 2.97 Gbps PRBS10, and the output signal is measured on the Agilent DCA-J 86100C oscilloscope. FIGURE 4. SD394 Output Waveform at 2.97 Gbps with 160m Belden 1694A Cable SD394 EVK User Guide Rev 1.2 4 of 8 © 2010, National Semiconductor Corp. FIGURE 5. SD394 Output Waveform at 1.485 Gbps with 200m Belden 1694A Cable FIGURE 6. SD394 Output Waveform at 270 Mbps with 400m Belden 1694A Cable SD394 EVK User Guide Rev 1.2 5 of 8 © 2010, National Semiconductor Corp. Input Return Loss Figure 7 shows input return loss of the LMH0394 as measured at the BNC on the SD394. The return loss is measured using the Agilent 8722ES VNA with a 75Ω BNC to 75Ω Type N connector on the input. Note that return loss is layout dependent. SMPTE LIMIT FIGURE 7. SD394 Input Return Loss SD394 EVK User Guide Rev 1.2 6 of 8 © 2010, National Semiconductor Corp. SD394 Bill of Materials Reference Designator C1, C2, C12 C3, C7, C9, C16 C5, C6 C10, C11 D1 J1 J2, J3 JP1 JP2 JP3, JP4, JP6, JP7, JP8, JP9 JP5 L1 PST1, PST2 R1 R2, R3 R4 R5, R7, R9 R6, R8, R10 R11 U2 Qty 3 4 2 2 1 1 2 1 1 6 1 1 2 1 2 1 3 3 1 1 Description Capacitor, 0.01uF, 16V, X7R, 0402 Capacitor, 4.7uF, 6.3V, X5R, 0402 Capacitor, 1uF, 6.3V, X5R, 0402 Capacitor, 0.1uF, 16V, X7R, 0402 LED, Green, 0603 BNC, 75-ohm, Amphenol, edge launch SMA, 50-ohm, edge launch Header, 6x1, 0.1" Header, 3x2, 0.1" Header, 3x1, 0.1" Header, 2x1, 0.1" Inductor, 5.6nH, 0402 Power Supply Terminal Resistor, 300-ohm, 1/10W, 5%, 0603 Resistor, 75-ohm, 1/16W, 1%, 0402 Resistor, 37.4-ohm, 1/16W, 1%, 0402 Resistor, 3.16k-ohm, 1/10W, 1%, 0402 Resistor, 9.76k-ohm, 1/10W, 1%, 0402 Resistor, 0-ohm, 1/10W, 5%, 0402 LMH0394 Cable Equalizer, LLP-16 Manufacturer Panasonic - ECG Panasonic - ECG Panasonic - ECG Kemet Lite-On Amphenol Johnson Components 3M/ESD 3M/ESD 3M/ESD 3M/ESD Murata Keystone Panasonic - ECG Yageo America Vishay/Dale Panasonic - ECG Panasonic - ECG Panasonic - ECG National Semiconductor Schematic (next page) SD394 EVK User Guide Rev 1.2 7 of 8 © 2010, National Semiconductor Corp. Manufacturer Part No. ECJ-0EB1C103K ECJ-0EB0J475M ECJ-0EB0J105M C0402C104K9RACTU LTST-C190GKT 031-6009 142-0701-851 929647-01-06-I 929665-01-03-I 929647-01-36-I 929647-01-02-I LQP15MN5N6B02D 1287-ST ERJ-3GEYJ301V RC0402FR-0775RL CRCW040237R4FKED ERJ-2RKF3161X ERJ-2RKF9761X ERJ-2GE0R00X LMH0394SQ A B C D GND PST2 0 1 1 VCC 0 1 PST1 2 R7 R5 VCC(PST1) 3.16K 3.16K 3.16K 2.5V Do Not Load Do Not Load 0 0 0 3.3V LMH0384 R9 9.76K LMH0394 R6 Do Not Load R5 3.16K MUTE/SCK GND C12 0.01UF VCC 9.76K C11 0.1UF 9.76K 2 3.16K R9 MOSI VEE/SSb 9.76K R8 GND 9.76K R10 GND SPI_Connector_SSb 3.16K R7 GND SPI_Connector_MOSI 9.76K R6 Z75_n: W=20MIL, ZO=75+/-5% LAYOUT NOTE: C10 0.1UF R8 C9 4.7UF R10 AUTOSLP/MISO SPI_Connector_SCK Power_Supply_Terminal GND Z75_1 Power_Supply_Terminal J1 1 2 3 4 5 6 BNC_EDGE SDI GND JP1 GND SCK MOSI MISO SS GND HDR_6 LMH0394_LMH0384 SPI Header 1 SPI Mode Pin Mode VCC D1 LED 3 L1 R1 300 R2 5.6nH 75 VCC GND R11 0 R3 75 GND 1 2 3 R4 37.4 CDb C5 1UF C6 1UF 1 2 3 JP2 1 3 5 GND C1 0.01UF CD/MUTE JP8 GND C16 4.7UF SPI_EN CDb BYPASS 2 4 6 4 1 2 3 4 VCC GND VCC C8 1UF BYPASS VCC C2 0.01UF GND 5 AUTOSLP/MISO VCC GND 4.7UF C7 4.7UF C3 JP4 3 2 1 SMA_R_EDGE J3 J2 SMA_R_EDGE AUTO SLEEP ENABLE ZDIFF100N_12 GND ZDIFF100P_12 LAYOUT NOTE: Z50_n: W=40MIL, ZO=50+-5% 5 ZDIFF100N_1 ZDIFF100P_1 HDR_2 MUTEREF 1 2 JP5 U2 LMH0394 12 11 10 9 GND VEE/SSb MUTEREF ASLP/MISO SDO SDO VEE/SS GND 3 2 1 JP3 Do not place JP2-JP4 in SPI Mode 1 2 3 GND BYPASS MUTE/SCK VEE SDI SDI SPI_EN JP9 BYPASS/CDb MOSI CDb/MOSI CDb 4 LMH0394-LMH0384 SPI Mode / Pin Mode Select (JP6-JP9) JP7 Place C1,C16, & C2 as close to U2 pin as possibleVCC 1 2 3 SPI_EN JP6 3 CDb/MOSI 16 15 14 13 VCC CD/MOSI MUTE/SCK VCC AEC+ AECBYPASS/CD MUTEREF 5 6 7 8 17 DAP 6 6 A B C D IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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