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PE43072 参数 Datasheet PDF下载

PE43072图片预览
型号: PE43072
PDF下载: 下载PDF文件 查看货源
内容描述: 50 Ω RF数字衰减器7位, 31.75分贝, DC- 4.0 GHz的 [50 Ω RF Digital Attenuator 7-bit, 31.75 dB, DC-4.0 GHz]
分类和应用: 衰减器
文件页数/大小: 11 页 / 465 K
品牌: PEREGRINE [ PEREGRINE SEMICONDUCTOR CORP. ]
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PE43702
Product Specification
Table 5. Control Voltage
State
Low
High
Bias Condition
0 to +1.0 Vdc at 2
µA
(typ)
+2.6 to +5 Vdc at 10
µA
(typ)
Table 9. Serial Attenuation Word Truth Table
Attenuation Word
D7
X
X
D6
L
L
L
L
L
L
L
H
H
D5
L
L
L
L
L
L
H
L
H
D4
L
L
L
L
L
H
L
L
H
D3
L
L
L
L
H
L
L
L
H
D2
L
L
L
H
L
L
L
L
H
D1
L
L
H
L
L
L
L
L
H
D0
(LSB)
L
H
L
L
L
L
L
L
H
Attenuation
Setting
RF1-RF2
Reference I.L.
0.25 dB
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.75 dB
Table 6. Latch and Clock Specifications
Latch Enable
0
X
X
X
X
X
X
Shift Clock
X
Function
Shift Register Clocked
Contents of shift register
transferred to attenuator core
Table 7. Parallel Truth Table
Parallel Control Setting
D6
L
L
L
L
L
L
L
H
H
X
D5
L
L
L
L
L
L
H
L
H
D4
L
L
L
L
L
H
L
L
H
D3
L
L
L
L
H
L
L
L
H
D2
L
L
L
H
L
L
L
L
H
D1
L
L
H
L
L
L
L
L
H
D0
L
H
L
L
L
L
L
L
H
Attenuation
Setting
RF1-RF2
Reference I.L.
0.25 dB
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.75 dB
Table 8. Serial Register Map
MSB (last in)
Q7
D7
Q6
D6
Q5
D5
Q4
D4
Q3
D3
Q2
D2
LSB (first in)
Q1
D1
Q0
D0
Bits can either be set to logic high or logic low
Attenuation Word
Attenuation Word is derived directly from the attenuation value. For example, to program the 12.5 dB state:
Attenuation Word: Multiply by 4 and convert to binary
4 * 12.5 dB
50
X0110010
Serial Input: X0110010
Document No. 70-0244-03
www.psemi.com
©2008-2009 Peregrine Semiconductor Corp. All rights reserved.
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