Texas Instruments DAC5689EVM - DAC5689 Evaluation Module DAC5689EVM DAC5689EVM 데이터 시트
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DAC5689EVM
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DAC5668/88/89 Hardware Description
Table 3. Input and Output Connections (continued)
REFERENCE
LABEL
CONNECTOR
DESCRIPTION
DESIGNATOR
TYPE
J19
OUTCLK1 Y4B
SMA
Optional CDCM7005 clock output.
J20
EXT_VCXO
SMA
External main clock input.
J21
DAC CLKOUT
SMA
CLKOUT output from DAC.
J22
EXT_REF_CLK
SMA
External reference clock input.
J23
RF_LO_IN
SMA
TRF3703 LO source input.
4.3
USB Interface
The DAC5668/88/89EVM contains a USB connector to interface to a USB 1.1 or later compliant USB port.
Programming of the CDCM7005 and DAC is accomplished through this port.
Programming of the CDCM7005 and DAC is accomplished through this port.
4.4
Power Management
The DAC5668/88/89EVM requires 1.8-V and 3.3-V supplies for normal operation. An additional 5-V supply
is required to power up the TRF3703 for RF measurements.
is required to power up the TRF3703 for RF measurements.
4.5
Input Data
The DAC5668/88/89EVM can accept 1.8-V or 3.3-V CMOS logic levels data inputs through the 34-pin
headers J2 and J7 per
headers J2 and J7 per
and
. The board provides series dampening resistors to minimize
digital ringing and switching noise. The DAC logic level is selected through software.
Table 4. Input Data Connector J2 – Data A Bus
Pin
Description
Pin
Description
1
CMOS data bit 15 (MSB)
18
GND
2
GND
19
CMOS data bit 6
3
CMOS data bit 14
20
GND
4
GND
21
CMOS data bit 5
5
CMOS data bit 13
22
GND
6
GND
23
CMOS data bit 4
7
CMOS data bit 12
24
GND
8
GND
25
CMOS data bit 3
9
CMOS data bit 11
26
GND
10
GND
27
CMOS data bit 2
11
CMOS data bit 10
28
GND
12
GND
29
CMOS data bit 1
13
CMOS data bit 9
30
GND
14
GND
31
CMOS data bit 0 (LSB)
15
CMOS data bit 8
32
GND
16
GND
33
SYNC
17
CMOS data bit 7
34
GND
Table 5. Input Data Connector J7 – Data B Bus
Pin
Description
Pin
Description
1
CMOS data bit 0 (LSB)
18
GND
2
GND
19
CMOS data bit 9
3
CMOS data bit 1
20
GND
4
GND
21
CMOS data bit 10
5
CMOS data bit 2
22
GND
7
SLAU241A – June 2008 – Revised March 2010
DAC5668/88/89EVM
Copyright © 2008–2010, Texas Instruments Incorporated