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Purpose
1.1 Purpose
The DAC5672/62/52 EVM provides a platform for evaluating the
DAC5672/62/52 digital-to-analog converter (DAC) family under various
signal, reference, and supply conditions. This document should be used in
combination with the EVM schematic diagram supplied.
1.2 EVM Basic Functions
Digital inputs to the DAC can be provided with CMOS level signals up to
275 MSPS through two 34-pin headers. This enables the user to provide
high-speed digital data to the DAC5672/62/52.
The analog output from the DAC is available via SMA connectors. Because
of its flexible design the analog output of the DAC5672/62/52 can be config-
ured to drive a 50- ? terminated cable using a 4:1 or 1:1 impedance ratio trans-
former or single-ended referred to GND.
Power connections to the EVM are via banana jack sockets. Separate sockets
are provided for the analog and digital supplies.
In addition to the internal bandgap reference provided by the DAC5672/62/52
device, options are provided on the EVM to allow external reference to be
provided to the DAC.
1.3 Power Requirements
The demonstration board requires only two power supplies. The first, +3.3 VA,
is required to be +3.3 VDC at banana jack J12 with the return going to J14. This
is the analog supply for the DAC5672/62/52. The second, +3.3 VB, is required
to be +3.3 VDC at banana jack J13 with the return to J15. This is the digital
+3.3-V supply for the DAC5672/62/52. The EVM can be powered using only
one supply, but powering from separate supplies will provide higher perfor-
mance.
Voltage Limits
Exceeding the maximum input voltages can damage EVM
components. Undervoltage may cause improper operation of some
or all of the EVM components.
The DAC5672/62/52 EVM provides a platform for evaluating the following digi-
tal-to-analog devices:
Table 1 ? 1. Device List
1-2
DEVICE
DAC5672
DAC5662
DAC5652
RESOLUTION
14 ? bit resolution
12 ? bit resolution
10 ? bit resolution
SAMPLE RATE
275 MSPS
275 MSPS
275 MSPS
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