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参数资料
| 型号： | HMC629LP4E |
| 厂商： | HITTITE MICROWAVE CORP |
| 元件分类： | 衰减器 |
| 英文描述： | 0 MHz - 6000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 5 dB INSERTION LOSS-MAX |
| 封装： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, LEADLESS, SMT, QFN-24 |
| 文件页数： | 3/8页 |
| 文件大小： | 885K |
| 代理商： | HMC629LP4E |
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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HMC629LP4 / 629LP4E
v07.0410
3 dB LSB GaAs MMIC 4-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Step Error vs. Frequency
(Only Major States are Shown)
-2
-1.5
-1
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1.5
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FREQUENCY (GHz)
BIT 24
BIT (3, 6, 12)
ALL BITS
Serial Control Interface
-100
-80
-60
-40
-20
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FREQUENCY (GHz)
(3, 6, 12) dB
24 dB
45 dB
Normal Relative Phase vs. Frequency
The HMC629LP4E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). The serial control interface
is activated when P/S is kept high. The 6-bit serial word must be loaded MSB first. The positive-edge sensitive CLK
and LE requires clean transitions. If mechanical switches are used, sufficient debouncing should be provided. When
LE is high, 4-bit data in the serial input register is transferred to the attenuator. When LE is high CLK is masked to
prevent data transition during output loading.
When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and the input register is loaded with
parallel digital inputs (D0-D5). When LE is high, 4-bit parallel data changes the state of the part per truth table.
For all modes of operations, the state will stay constant while LE is kept low.
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