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參數(shù)資料
| 型號： | HMC271LP4E |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz |
| 中文描述： | 1分貝LSB的砷化鎵微波單片集成電路的5位串行控制數(shù)字衰減器，0.7 - 3.7吉赫 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 476K |
| 代理商： | HMC271LP4E |
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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
CMOS Control Voltages
Truth Table
Serial Data Input
Attenuation
Setting
RF1 - RF2
C1
C2
C4
C8
C16
High
High
High
High
High
Reference
I.L.
Low
High
High
High
High
1 dB
High
Low
High
High
High
2 dB
High
High
Low
High
High
4 dB
High
High
High
Low
High
8 dB
High
High
High
High
Low
16 dB
Low
Low
Low
Low
Low
31 dB
Max. Atten.
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
State
Vcc = +5V
Vcc = +3V
Low
0 to 1.3V
0 to 0.7V
High
3.5 to 5.0V
2.3 to 3.0V
-1.2
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
0.5
1
1.5
2
2.5
3
3.5
4
S
FREQUENCY (GHz)
Worst Case Step Error
Between Successive Attenuation States
Timing Diagram
1 dB LSB GaAs MMIC 5-BIT SERIAL
CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz
HMC271LP4
/
271LP4E
v02.0705
Serial Input Truth Table
Latch
Enable
Shift
Lock
Reset
Function
X
X
L
Shift register cleared
X
H
Shift register locked
X
H
Contents of shift register
transferrred to output latches
Parameter
Symbol
Vcc = +5V
Vcc = +3V
Unit
Min.
Max.
Min.
Max.
Serial IN Setup Time
ts
20
-
100
-
ns
Hold time from Serial
In to Shift Clock
th
0
-
5
-
ns
Setup time from
Shift clock to Latch
Enable
tlsup
40
-
100
-
ns
Propogation delay,
Latch enable to Qa
through Qh
tpd
-
30
-
70
ns
Setup time from
Reset to Shift Clock
-
20
-
50
-
ns
Clock Frequency
(1/tclk)
fclk
-
30
-
10
MHz
Timing
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