DS32EV100-EVK

DS32EV100-EVK User Guide DS32EV100 Programmable Equalizer Overview The DS32EV100-EVK evaluation board provides a typical application for the evaluation of the DS32EV100 programmable equalizer. Specifications DC Input Power (JP1): 3.3V ± 10%, or 2.5V ± 5% Serial Data Inputs (IN_+/- ): High-speed CML inputs. Acceptable data input speed DC – 3.2 Gbps. For more details, please refer to the datasheet. Serial Data Outputs (OUT_+/- ): High-speed CML outputs. For more details, please refer to the datasheet. CML Input Voltage: -0.5V to 4.0V CMOS Input Voltage: -0.5V to 4.0V Jumper Settings E101 ( EQ_SEL[0:2] ): These jumpers are control equalization boost levels. The boost setting on the evaluation board is set to 111 with on board pull up resistors R101, R102, R103 connected to VCC. IMPORTANT ERRATA: EQUALIZATION SETTINGS E101( EQ_SEL[2:0]/BST[2:0]) These pins control the boost level and currently only have the option to be connected to ground using jumpers. In order to select maximum equalization the EQ_SEL[0:2]/BST[0:2] must be hardwired to Vdd. When selecting these EQ settings please use external hardware to force Vdd on these pins. Please see Table 1 for equalizer boost control settings. Table 1. Equalization Boost Controls 6 mil microstrip FR4 trace length (in) 0 5 10 15 20 25 30 40 24 AWG Twin-AX cable length (m) 0 2 3 4 5 6 7 10 DS32EV100-EVK User Guide November 2007 © National Semiconductor Corporation Channel loss at 1.6 GHz [BST_2, BST_1, BST_0] 0 dB 3 dB 6 dB 7 dB 8 dB 10 dB 12 dB 14 dB 000 001 010 011 1 0 0 (Default) 101 110 111 Bill of Materials DESIGNATION C105 C101, C102, C103, C104, C106, C108 C107 C109 R101, R102, R103 JP101 E101 J101, J102, J103, J104 U1 Schematics DS32EV100-EVK User Guide November 2007 © National Semiconductor Corporation QTY 1 DESCRIPTION 0.01uF +10% Ceramic Capacitor 0402 6 1 1 3 1 1 4 1 0.1uF +10% Ceramic Capacitor 0402 4.7uF +10% Ceramic Capacitor 1206 22uF +10% Tan Capacitor 6032 4 Pin Header 3X2 Pin Header SMA Edge Tab Receptacle National DS32EV100 Top View Layout DS32EV100-EVK User Guide November 2007 © National Semiconductor Corporation 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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