HMC624LFLP4E Datasheet, PDF (3/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz

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HMC624LFLP4E
0.5 dB LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, 60 - 500 MHz
8
Step Attn vs. Attn State, 60 - 300 MHz
0.8
60 MHz
0.7
100 MHz
200 MHz
300 MHz
0.6
Step Attn vs. Attn State, 400-500 MHz
0.8
0.7
400 MHz
500 MHz
0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0
4
8
12 16 20 24 28 32
ATTENUATION STATE (dB)
IP3 @ Major Attenuation States
70
0.2
0
4
8 12 16 20 24 28 32
ATTENUATION STATE (dB)
P0.1dB vs. Temperature
40
60
35
50
30
+25 C
40
25
+85 C
-40 C
30
50
150
250
350
450
550
FREQUENCY (MHz)
20
50
150
250
350
450
550
FREQUENCY (MHz)
Serial Control Interface
The HMC624LFLP4E 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, 6-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, 6-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.
8-3
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Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
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