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Application Note 9855
Differential-to-Single Ended Transformer Outputs, I and Q
PIN 15 OF HI5828 (U3), IOUTA
PIN 16 OF HI5828 (U3), IOUTB
J10 (SMA)
100 ?
T2
V OUT = (2 x I IOUTFS x R EQ )
J2 (SMA)
J9 (SMA)
R5
50 ?
R EQ = THE EQUIVALENT IMPEDANCE
SEEN AT EACH DAC OUTPUT (~12.5 ? HERE)
R3
50 ?
R4
J5
0 ?
R2
50 ?
R2 NOT USED
PIN 22 OF HI5828 (U3), QOUTA
PIN 21 OF HI5828 (U3), QOUTB
J13 (SMA)
100 ?
T1
V OUT = (2 x I QOUTFS x R EQ )
J1 (SMA)
J14 (SMA)
R6
50 ?
R10
50 ?
R8
J6
0 ?
R1
50 ?
R1 NOT USED
J5, J6 ALLOW TRANSFORMER CENTER TAP TO BE GROUNDED.
THIS BIASES THE DAC’S OUTPUT TO 0VDC.
Appendix D Evaluation Board Bill Of Materials
REFERENCE DESIGNATOR
U3
C2, 6
C3, 7, 19, 20, 23, 39, 42, 44-46
C4, 8, 40, 41, 43 (Not Populated)
R9, 12, 14, 16, 18-42 (Not Populated)
R7, 70-97 (R70, 71, 84, 85 Not Populated)
R4, 8
R3, 5, 6, 10 (R1, 2 Not Populated)
R15 (Not Populated)
R43
J3, 8
Header Jumper
T1, 2
J42
J1, 2, 9, 10, 13, 14 (J33 Not Populated)
L1, L2
J11, 12, 16, 17, 19, 20, 24-26, 28-32 (Not Populated)
Mechanical Clamp (Not Populated)
Plastic Standoffs
QTY
1
2
10
0
0
29
2
4
0
1
2
2
2
1
6
2
14
0
4
DESCRIPTION
HI5828IN, Intersil Dual 12-bit D/A Converter, 48 Pin LQFP
10 μ F, Tantalum Chip Cap, SMD, 10%, 10V
0.1 μ F, Ceramic Chip Cap, 0805, 10%, 50V
1 μ F, Ceramic Chip Cap, 0805, +80-20%, 16V
50 ? , Chip Resistor, 1210, 5%, 1/4W
0 ? , Chip Resistor, 0805, 1/8W
100 ? , Chip Resistor, 0805, 1/8W
49.9 ? , Chip Resistor, 0805, 1/8W
25k ? , Potentiometer Res, 3296W, 1/4W, 10%
1.91k ? , Chip Resistor, 0805, 1/8W
1x2 Header
1x2 Header Jumper
Mini-Circuits, T1-1T KK81, Z1:Z2 ratio of 1:1
96-Pin Eurocard, Right Angle, Female
SMA Straight Jack, PCB Mount
0 ? , Chip Resistor, 1206, 1/8W, 5%
Solder Jumpers (Connects I and Q input bits together for driving
with the same pattern)
DUT Clamp
3/4”
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certi?cation.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
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