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参数资料
| 型号： | HMC759LP3E |
| 厂商： | HITTITE MICROWAVE CORP |
| 元件分类： | 衰减器 |
| 英文描述： | 10 MHz - 300 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 4.5 dB INSERTION LOSS-MAX |
| 封装： | 3 X 3 MM, ROHS COMPLIANT, LEADLESS, PLASTIC, SMT, QFN-16 |
| 文件页数： | 4/8页 |
| 文件大小： | 697K |
| 代理商： | HMC759LP3E |
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
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HMC759LP3E
v00.0909
0.25 dB LSB BiCMOS MMIC 7-BIT
DIGITAL ATTENUATOR, 10 - 300 MHz
Bias Voltage
Vdd (V)
Idd (typ.) (A)
4.5
580
5.0
650
5.5
710
PUP Truth Table
Truth Table
Power-Up States
Le
PuP1
PuP2
relative Attenuation
0
-31.75
0
1
0
-24
0
1
-16
0
1
Insertion Loss
1
X
Indeterminate
If Le is set to logic LoW at power-up, the logic state
of PuP1 and PuP2 determines the power-up state
of the part per PuP truth table. If the Le is kept high
at power up, power up state will be indeterminate
therefore is not recommended.
Power-On Sequence
the ideal power-up sequence is: GnD, Vdd, digital
inputs, rF inputs. the relative order of the digital
inputs are not important as long as they are powered
after Vdd / GnD
Parameter
typ.
Min. serial period, t
sCK
100 ns
Control set-up time, t
Cs
20 ns
Control hold-time, t
CH
20 ns
Le setup-time, t
Ln
10 ns
Min. Le pulse width, t
LeW
10 ns
Min Le pulse spacing, t
Les
630 ns
serial clock hold-time from Le, t
CKn
10 ns
Control Voltage Table
state
Vdd = +5V
Low
0 to 0.8V @ <1 A
High
2 to 5V @ <1 A
Control Voltage Input
reference
Insertion Loss
(dB)
D6
D5
D4
D3
D2
D1
D0
High
0
High
Low
0.25
High
Low
High
0.5
High
Low
High
1
High
Low
High
2
High
Low
High
4
High
Low
High
8
Low
High
16
Low
31.75
Any combination of the above states will provide an attenuation equal to the sum of the bits selected.
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