EK1HMC7044LP10B User Guide

UG-826

Rev. 0 | Page 3 of 10

EVALUATION BOARD HARDWARE

The following instructions are for setting up the physical

connections to the EV3HMC7044LP10B evaluation board.

CHECKING JUMPER CONNECTIONS

Remove all jumpers (JP2 and JP3).

SETTING UP THE POWER AND PC CONNECTIONS

Set up the power and PC connections as follows:

1.

Install the HMC7044 evaluation software before

connecting the evaluation board to the PC for the first time

(see the Installing the Software section). Administrative

privileges are required for the installation.

2.

Connect a 5 V supply voltage to Test Point TP38 of the

evaluation board.

3.

Connect the USB interface board to the evaluation board,

as shown in Figure 2.

4.

Connect the USB cable to the USB interface and the PC.

5.

The Found New Hardware Wizard automatically appears

when the USB interface is connected. Select Install the

software automatically

and then click Next.

6.

The Found New Hardware Wizard may appear twice

during the installation.

See the Evaluation Board Software section for details on

running the HMC7044 board software.

SETTING UP THE SIGNAL CONNECTIONS

After setting up the power and PC connections, use the

following procedure to set up signal connections:

1.

Connect a signal generator to the CLKIN0_RFSYNC_P

SMA Connector J11. By default, the reference inputs on the

evaluation board are ac-coupled. Terminate the

CLKIN0_RFSYNC_N SMA Connector J10 with a 50 Ω

termination. An amplitude setting of 6 dBm from the

signal generator is sufficient.

2.

Connect an oscilloscope, spectrum analyzer, or other

lab equipment to any output of the CLKOUTx_P or

CLKOUTx_N SMA connectors. Place a 50 Ω termination

on all unused differential output pairs.

BYPASSING THE 5 V LDO POWER SUPPLY

The evaluation board contains three on-board, low dropout

regulators (LDOs) to regulate 5 V to 3.3 V supply domain. The

evaluation board can be configured to bypass linear regulators,

which is useful for measuring HMC7044 power consumption.

See the evaluation board schematics provided on the

EK1HMC7044LP10B product page at www.analog.com.

Bypass the 5 V two on-board LDOs for the HMC7044 as follows:

1.

Remove the on-board LDOs (U2 and U4).

2.

Populate R241, FB10, C105, C154, and C159 for

VCC1_VCO.

3.

Remove R245 and FB20.

4.

Populate R12 (to isolate the SPI interface board current

consumption from the HMC7044).

Connect a bench 3.3 V power supply to each of the supply pins

on the 3.3 V main header (TP15).

Note that it is very important to not have the 5 V supply

connected to TP15 of the evaluation board.

Connect a bench 5.0 V power supply to TP38 for the on-board

LDO of the VCXO supply, VCC_VCXO.

Figure 2. HMC7044 Evaluation Kit Setup