HI5728EVAL1 Intersil, HI5728EVAL1 Datasheet

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HI5728EVAL1

Manufacturer Part Number
HI5728EVAL1
Description
EVALUATION PLATFORM TQFPHI5728
Manufacturer
Intersil
Datasheets

Specifications of HI5728EVAL1

Number Of Dac's
2
Number Of Bits
10
Outputs And Type
2, Differential
Sampling Rate (per Second)
125M
Data Interface
Parallel
Settling Time
35ns
Dac Type
Current
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
HI5728
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Description
The HI5728EVAL1 evaluation board provides a quick and
easy method for evaluating the HI5728, 125MSPS Dual High
Speed DAC. Each converter outputs a current into a load
resistor to form a voltage which can be measured by using
the included SMA connectors. The amount of current out of
the DAC is determined by an external resistor and either an
internal or external reference voltage. The evaluation board
also includes a VME digital interface that is compatible with
the HSP-EVAL board, so DDS (Direct Digital Synthesis) can
be performed with minimal setup time. A transformer is
included to take advantage of differential signal drive.
Ordering Information
Functional Block Diagram
HI5728EVAL1
NUMBER
PART
RANGE (
REFERENCE
(OPTIONAL)
EXTERNAL
TEMP.
25
SMA7
CONNECTOR
64 or 96-PIN
o
C)
VME
3-1
TM
P1
Evaluation Platform
PACKAGE
1-888-INTERSIL or 321-724-7143
Application Note
I-CHANNEL 10 BITS
Q-CHANNEL 10 BITS
CLOCK
QCLK
SMA8
SMA9
ICLK
J3
REF SELECT
AVDD
125MHz
CLOCK
SPEED
RSET POT
R68
QCLK
ICLK
HI5728
SLEEP
|
J2
DAC
Intersil and Design is a trademark of Intersil Corporation.
U1
J1
Features
• HI5728, 125MSPS CMOS DAC
• Simple and Easy to Use
• Standard VME/DSP Interface, HSP-EVAL Compatible
• SMA Outputs with Transformer Option
• Easily Selectable Internal or External Reference
Applications
• I and Q Signal Generation
• Modulated Carrier Generation
• General DAC Performance Evaluation
• Amplitude Modulation Via External Reference
HI5728EVAL1 User’s Manual
QOUTB
QOUTA
IOUTB
IOUTA
February 2000
XFMR
XFMR
T1
T2
IOUT
SMA5
QOUT
SMA6
|
Copyright
DV
AV
DD
DD
©
Intersil Corporation 2000
AN9827.2

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HI5728EVAL1 Summary of contents

Page 1

... TM Application Note Description The HI5728EVAL1 evaluation board provides a quick and easy method for evaluating the HI5728, 125MSPS Dual High Speed DAC. Each converter outputs a current into a load resistor to form a voltage which can be measured by using the included SMA connectors. The amount of current out of the DAC is determined by an external resistor and either an internal or external reference voltage ...

Page 2

Functional Description Overview The evaluation board is configured to be interfaced using a VME connector. The data input lines are tied together using small, zero ohm resistors on the back side of the board (QD0 is tied to ID0, continued ...

Page 3

Differential Output The board is also configured with the following transformer output which will result in an output voltage amplitude that is twice that Req, where Req is the equivalent OUT resistive loading seen by the current ...

Page 4

... The HSP45116 NCOM generates two, 16-bit channels of data. HI5728EVAL1 is designed so that both of its input channels mate with both of the DSP’s output channels. The zero ohm resistors that connect the I and Q channels together on the DAC eval board must be removed before using the HSP45116 evaluation board ...

Page 5

... HI5728EVAL1 DAC MODULE HI5728 I Channel Q Channel ...

Page 6

Appendix B Pin Description PIN NO. PIN NAME 39-30 QD9 (MSB) Through Digital Data Bit 9, the Most Significant Bit through Digital Data Bit 0, the Least Significant Bit, of the QD0 (LSB) Q Channel. 1-6, 48-46 ID9 (MSB) Through ...

Page 7

Appendix C Circuit Board Layout 3-7 Application Note 9827 FIGURE 3. PRIMARY SIDE FIGURE 4. GROUND LAYER (2) ...

Page 8

Appendix C Circuit Board Layout 3-8 Application Note 9827 (Continued) FIGURE 5. POWER LAYER (3) FIGURE 6. SECONDARY SIDE ...

Page 9

Power Supply Input Circuit FB2 DIGITAL POWER PLANE DVDD1 PINS 9, 29, 40, 45 C14 OF THE HI5728 C13 0 DIGITAL GROUND PLANE DGND1 PINS 10, 28, 41 THE HI5728 FB1 ...

Page 10

VME CONNECTOR ( PIN) R17 C19 LSB P1-83 200 A18 P1-18 R12 A17 P1-17 200 C17 P1-81 R14 A16 P1-16 200 C16 P1-80 R13 A15 P1-15 200 C15 P1-79 R19 A14 P1-14 200 C14 MSB P1-78 P1-77 CLK ...

Page 11

TP2 TP1 ANALOG DIGITAL GROUND GROUND ICOMP1 0 R56 IOUTA IOUTB R61 0 QOUTB QOUTA R69 0 QCOMP1 0.1 F 0.1 F C10 C4 AVDD POWER PLANE NOTE: E6 was mistakenly grounded so R56 should not be populated! E7, however, ...

Page 12

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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