Datasheet
4.2 Input/Output Connectors
4.3 USB Interface
4.4 Power Management
4.5 Input Connector
DAC5681/81Z/82z EVM Hardware Description
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Table 2 lists the input and output connectors on the EVM.
Table 2. Input and Output Connectors
Reference
Label Connector Type Description
Designator
DACB transformer output. Optional IOUTB2 output. Not populated
J1 IOUTB2 SMA
on DAC5681/81z.
J2 IOUTB1 SMA Optional IOUTB1 output. Not populated on DAC5681/81z.
J3 IOUTA2 SMA DACA transformer output. Optional IOUTA2 output.
J4 IOUTA1 SMA Optional IOUTA1 output.
J5 SEMTEK Input LVDS data to DAC. Output clock to data source.
J6 EXT_VCXO_P SMA External main clock input.
J7 EXT_VCXO_N SMA External VCXO negative connection. Not required.
J8 Y2A_CLK SMA Optional CDCM7005 clock output.
J9 EXT_REF_CLK SMA External reference clock input.
J10 Y2B_CLK SMA Optional CDCM7005 clock output.
J13 USB_CONN USB USB connector for software communication.
J14/J15 +1.8V_IN Banana Plug +1.8V connection pair.
J16 RFOUT SMA RF output from TRF3703.
J17/J18 +3.3V_IN Banana Plug +3.3V connection pair.
J19/J20 +5VA_IN Banana Plug +5V connection pair. Required only for RF measurements.
J23 RF_LO_IN SMA TRF3703 LO source input. Not populated on DAC5681/81z.
The DAC5681/81z/82z EVM has a 4-pin USB port connector that interfaces to a USB 1.1 (or later)
compliant USB port. Programming of the CDCM7005 and DAC is accomplished through this port.
The DAC5681/81z/82z EVM requires 1.8-V and 3.3-V supplies for normal operation. An additional 5-V
supply is required supply power up the TRF3073 for RF measurements.
The DAC5681/81z/82z EVM accepts LVDS inputs through a SEMTEK connector. These inputs drive
DCLK, SYNC and D15-D0 LVDS pairs on the DAC device. An LVDS clock signal from the CDCM7005 is
also output through this connector. This output clock is useful for synchronization with the pattern
generation source.
Table 3. Input Connector
Pin Description Pin Description
47 D15P 101 D7P
49 D15N 103 D7N
53 D14P 107 D6P
55 D14N 109 D6N
59 D13P 113 D5P
61 D13N 115 D5N
65 D12P 119 D4P
8 DAC5681/81z/82z EVM SLAU236A – November 2007 – Revised October 2008
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