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Chapter 2: Board Components and Interfaces
2–11
Component Interfaces
© November 2008
Altera Corporation
Data Conversion HSMC Reference Manual
A/D Converter Input SMA Connector (J4, J8)
J4 (channel A) and J8 (channel B) are standard through-hole SMA connectors used to
interface the AD9254 A/D converter input with SMA cables.
D/A Converter (U3)
The D/A converter (U3 for channels A and B) on the Data Conversion HSMC
provides 14-bit resolution and produces samples at rates up to 275 MS/s. It is a
high-speed TI DAC5672 D/A converter and is set up to drive a differential-to-single
output through a transformer. The output is transformer coupled and can be found on
the SMA connector (J12 for channel A, J14 for channel B). The output of the
TI DAC5672 D/A converter is set to the maximum output current of 20 mA. The
signal-to-noise ratio for the system is up to 60 dB for output signals from 1 MHz to the
Nyquist frequency of the converter.
Table 2–13
lists the D/A converter board reference and manufacturing information.
Table 2–14
provides the pin-out details of the D/A converter channel A and
channel B.
XT_IN_P
96
PCLK2P
9
Non-inverting Differential clock input
XT_IN_N
98
PCLK2N
10
Inverting Differential clock input
AD(A,B)_CLK_SEL_P
—
QP
15
Non-inverting Differential Clock Output
AD(A,B)_CLK_SEL_N
—
QN
14
Inverting Differential Clock Output
Table 2–12.
Differential to LVDS Clock Multiplexer (U9, U10) Pin-Out Information (Part 2 of 2)
Schematic Signal
HSMC
Connector
Pin Number
Device Signal
Device Pin
Number
Description
Table 2–13.
D/A Converter Component Reference
Board Reference
Device Description
Manufacturer
Manufacturing
Part Number
Manufacturer
Website
U3
14-bit, 275 MS/s D/A converter
Texas Instruments
DAC5672
www.ti.com
Table 2–14.
D/A Converter Channel A and Channel B (U3) Pin-Out Information (Part 1 of 2)
HSMC Signal
HSMC Pin
Device Signal
Device Pin
Number
Description
DA0
139
DA0
14
Data port A0
DA1
137
DA1
13
Data port A1
DA2
133
DA2
12
Data port A2
DA3
131
DA3
11
Data port A3
DA4
127
DA4
10
Data port A4
DA5
125
DA5
9
Data port A5
DA6
121
DA6
8
Data port A6
DA7
119
DA7
7
Data port A7
DA8
115
DA8
6
Data port A8
DA9
113
DA9
5
Data port A9