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參數(shù)資料
| 型號： | HMC542LP4E |
| 廠商： | HITTITE MICROWAVE CORP |
| 元件分類： | 衰減器 |
| 英文描述： | 0 MHz - 3000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 1.8 dB INSERTION LOSS-MAX |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, LEADLESS, PLASTIC, SMT, QFN-24 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 511K |
| 代理商： | HMC542LP4E |
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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IG
It
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t
5
5 - 3
DISC
ONT
INUE
D
PRO
DUC
T
Not R
ecom
men
ded
for N
ew D
esig
ns
Worst Case Step Error
Between Successive Attenuation States
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0
0.5
1
1.5
2
2.5
3
3.5
4
S
T
E
P
E
R
O
R
(d
B
)
FREQUENCY (GHz)
Timing Diagram
Truth Table
Control Voltage Input
C16
C8
C4
C2
C1
C0.5
High
reference
I.L.
High
Low
0.5 dB
High
Low
High
1 dB
High
Low
High
2 dB
High
Low
High
4 dB
High
Low
High
8 dB
Low
High
16 dB
Low
31.5 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Digital Control Voltages
state
Vcc = +5V
Low
0 to 1.3V
High
3.5 to 5V
Parameter
symbol
Vcc = +5V
units
Min.
Max.
serial Input setup time
ts
20
-
ns
Hold time from serial
Input to shift Clock
th
0
-
ns
setup time from shift
Clock to Latch enable
tlsup
40
-
ns
Latch enable Window,
Latch enable to C0.5
through C8
tpd
-
30
ns
setup time from reset to
shift Clock
-
20
-
ns
Clock Frequency
(1/tclk)
fclk
-
30
MHz
Timing
Serial Input Truth Table
Latch
enable
shift
Clock
reset
Function
X
L
shift register cleared
X
á
H
shift register clocked
á
X
H
Contents of shift register
transferred to Digital
Attenuator
HMC542LP4 / 542LP4E
v03.0809
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 3 GHz
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