Texas Instruments DAC5681ZEVM - DAC5681Z Evaluation Module DAC5681ZEVM DAC5681ZEVM 데이터 시트
제품 코드
DAC5681ZEVM
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Overview
1.1
Purpose
1.2
EVM Basic Functions
1.3
Power Requirements
1.3.1
Voltage Limits
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Overview
The DAC5681/81z/82z EVM provides a platform for evaluating the
and
family of 16-bit, 1GSPS digital-to-analog converters (DAC) under various signal, reference, and supply
conditions. The evaluation module allows designers using the DAC5682z to analyze either a
transformer-coupled output from the DAC or an RF-modulated output using Texas Instruments TRF3703
analog quadrature modulator. The DAC5681 and DAC5681z options only allow the use of a
transformer-coupled output. Use this document with the EVM schematic diagram and the corresponding
device datasheet (
conditions. The evaluation module allows designers using the DAC5682z to analyze either a
transformer-coupled output from the DAC or an RF-modulated output using Texas Instruments TRF3703
analog quadrature modulator. The DAC5681 and DAC5681z options only allow the use of a
transformer-coupled output. Use this document with the EVM schematic diagram and the corresponding
device datasheet (
,
, and
).
Digital inputs to the DAC can be provided with LVDS level signals up to 1 GSPS through a SEMTEK
connector compatible with various pattern generation solutions. The analog outputs from the DAC are
available via SMA connectors. Because of its flexible design the analog outputs of the DAC device can be
configured to drive a 50-
connector compatible with various pattern generation solutions. The analog outputs from the DAC are
available via SMA connectors. Because of its flexible design the analog outputs of the DAC device can be
configured to drive a 50-
Ω
terminated cable using a 4:1 or 1:1 impedance ratio transformer, or
single-ended referred to AVDD. The EVM also allows for an option to use Texas Instrument’s TRF3703
analog quadrature modulator to mix the DAC outputs to RF. This option is only available when using the
DAC5682z.
analog quadrature modulator to mix the DAC outputs to RF. This option is only available when using the
DAC5682z.
The EVM also includes a Texas Instrument’s CDCM7005 clock distribution device to clock the system.
The CDCM7005 can be used in conjunction with an on-board VCXO for full PLL functionality or with an
external signal source in which case the CDCM7005 functions as a buffer.
The CDCM7005 can be used in conjunction with an on-board VCXO for full PLL functionality or with an
external signal source in which case the CDCM7005 functions as a buffer.
Power connections to the EVM are via banana jack sockets. In addition to the internal bandgap reference
provided by the DAC devices, the EVM allows an external reference to be provided to the DAC.
provided by the DAC devices, the EVM allows an external reference to be provided to the DAC.
The DAC5681/81z/82z EVM allows the user to program the DAC and CDCM7005 registers through a
USB port. The interface allows read and write access to all the DAC registers and write-only access to the
CDCM7005 registers.
USB port. The interface allows read and write access to all the DAC registers and write-only access to the
CDCM7005 registers.
The DAC5681/81z/82z EVM requires 1.8-Vdc and 3.3-Vdc supplies for normal operation. An additional
5-Vdc supply is required to power up the TRF3703 for RF measurements.
5-Vdc supply is required to power up the TRF3703 for RF measurements.
CAUTION
Exceeding the maximum input voltages can damage EVM components.
Undervoltage may cause improper operation of some or all of the EVM
components.
Undervoltage may cause improper operation of some or all of the EVM
components.
SLAU236A – November 2007 – Revised October 2008
DAC5681/81z/82z EVM
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