EV1HMC7545ABLP47
EV1HMC7545ABLP47 Datasheet
| Part | Datasheet |
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EV1HMC7545ABLP47 |
EV1HMC7545ABLP47 (pdf) |
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| HMC7545AxLP47 Gbps 4-Channel Asynchronous Signal Conditioner Evaluation Board EVB User Guide User Guide Part # 140-00153-00 ECN# CP140238 Hittite Microwave Corporation 2 Elizabeth Dr Chelmsford, MA 01824 United States Hittite Microwave Corporation Proprietary Page 1 of 26 HMC7545AxLP47 4-Channel Signal Conditioner Evaluation Board User Guide Contents Introduction HMC7545AxLP47 EVB Signal Descriptions HMC7545AxLP47 Operational Modes HMC7545AxLP47 EVB Lab Equipment Configuration p. 14 HMC7545AxLP47 EVB Operating Instructions p. 15 HMC7545AxLP47 EVB Equalization EQ and De-Emphasis DE Operation p. 23 Hittite Microwave Corporation Proprietary Page 2 of 26 HMC7545AxLP47 4-Channel Signal Conditioner Evaluation Board User Guide Introduction The HMC7545AxLP47 is a uni-directional quad channel asynchronous signal conditioner designed for serial links, operating up to Gbps, of short and intermediate optical modules, linecards, and backplane applications. HMC7545AxLP47 can be used either on the receiver or transmitter path for compensating signal impairments by means of input Equalization EQ and output De-Emphasis DE functions. The HMC7545AxLP47 is protocol and datarate agnostic and ideal for SAS/SATA, PCIe, Fibre Channel, Infiniband, and Ethernet applications. The HMC7545AxLP47 4-Channel Signal Conditioner Evaluation Board EVB is available for internal characterization at Customer sites. This document provides operating instructions and guidelines for the HMC7545AxLP47 EVB. There are two versions of this part HMC7545ABLP47 2-Tap FIR Tx and HMC7545AALP47 3-Tap FIR Tx. Please refer to the HMC7545AxLP47 datasheet for product specifications. The HMC7545AxLP47 operates at data rates up to Gb/s. Its primary function is to compensate for channel losses due to long backplane, or other lengthy system PCB traces using FR4 dielectric transmission lines, for example. These compensation circuits consist of channel equalization EQ at the inputs, and channel pre-emphasis PE at the outputs, as shown in the functional diagram in Figure The HMC7545AxLP47 typically operates on a +2.5V power supply, but can also run on +3.3V. The HMC7545AxLP47 operation is specified at 88 mW/ channel under typical conditions. All 4 input and 4 output signals of the HMC7545AxLP47 4-Channel Signal Conditioner are accessible via SMA connectors on the EVB. This is shown in Figure The input channels are IN0P/N, IN1P/N IN2P/N, IN3P/N and the output channels are OUT0P/N OUT1P/N, OUT2P/N, OUT3P/N. These I/O channel signals are AC-coupled on the EVB using 100nF ultra-broadband coupling capacitors to facilitate interfacing to ground-referenced test equipment, such as PRBS pattern generators inputs , and Oscilloscopes outputs . Transmission line load boards of various lengths, and representing real-world lossy channel conditions, can be attached to the EVB via the SMA connectors at inputs or outputs. Lossy channels can be used in this way to demonstrate the Signal Integrity improvements of the Pre-Emphasis PE and Equalization EQ features of the HMC7545AxLP47. A photograph of the physical HMC7545AxLP47 EVB is given in Figure 3, and shows component locations, power connections, USB connector, jumpers, and I/O signal orientation. The HMC7545AxLP47 can be configured via one of the three modes of operation, as described, below. 1 Parallel Mode Parallel Mode uses jumpers provided on the EVB to configure the HMC7545AxLP47. 2 I2C Mode The HMC7545AxLP47 EVB Graphical User Interface GUI is used in I2C mode to set the values of the internal registers to default settings, or user-defined values. A register map is included in the data sheet. Hittite Microwave Corporation Proprietary Page 3 of 26 HMC7545AxLP47 4-Channel Signal Conditioner Evaluation Board User Guide 3 EEPROM Mode This mode uses the EEPROM on the EVB to store register values. The GUI is used to enter and optimize these settings. The HMC7545AxLP47 will then operate using the settings stored on the EEPROM. Figure 1 HMC7545AxLP47 4-Channel Signal Conditioner Functional Diagram Rx_EQ0 Rx_EQ1 MODE Tx_EQ0 Tx_EQ1 TXDOUT IN0P 1 IN0N 2 VCCI 3 IN1P 4 IN1N 5 VCCI 6 VCCI 7 IN2P 8 IN2N 9 VCCI 10 IN3P 11 IN3N 12 36 35 34 33 32 31 4 Channel Signal Conditioner 4x7 mm QFN package 13 14 15 16 17 18 30 OUT0P 29 OUT0N 28 VCCO 27 OUT1P 26 OUT1N 25 VCCO 24 VCCO 23 OUT2P 22 OUT2N 21 VCCO 20 OUT3P 19 OUT3N |
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