MAPS-010146_15 Datasheet, PDF (5/6 Pages) M/A-COM Technology Solutions, Inc. – Digital Phase Shifter

MAPS-010146
Digital Phase Shifter
4-Bit, 8.0 - 12.0 GHz
Rev. V3
Modes of Operation:
Serial and Direct Parallel
Serial Mode
The serial control interface (SERIN, CLK, LE,
SEROUT) is compatible with the SPI protocol. SPI
mode is activated when P/S is kept high. The 6-bit
serial word must be loaded with the MSB first. After
shifting in the 6 bit word, a rising edge on LE will set
the phase shifter to the desired state. While LE is
high the CLK is masked to protect the data while
implementing the change. SEROUT is SERIN
delayed by 6 clock cycles.
When P/S is low, the serial control interface is
disabled. When P/S is set high, Pins 22, 23, and 24
have the LE, CLK, and SER IN function.
In serial mode operation, the outputs will stay
constant while LE is kept low.
Direct Parallel Mode
The parallel mode is enabled when P/S is set low. In
the direct parallel mode, the phase shifter is
controlled by the parallel control inputs directly.
When P/S is set low, Pins 22, 23, and 24 have the
D3, D2, and D1 function.
Mode Truth Table ^8,9
P/S
LE
1
X
0
N/A
Mode
Serial
Direct Parallel
8. There are two dummy bits (D1 & D2), that must be sent in the
serial mode. This is because the 4 bit phase shifter uses the
same driver as the 6 bit phase shifter.
9. In the parallel mode, D1 and D2 should be tied to ground or to
V_CC.
Truth Table (Digital Phase Shifter) ¹⁰
D6 D5 D4 D3 D2 D1
Phase Shift
0 0 0 0 X X Reference Phase
0 0 01XX
22.5 deg
0 0 10XX
45 deg
0 1 00XX
90 deg
1 0 00XX
180 deg
1 1 11XX
337.5 deg
10. 0 = CMOS Low; 1 = CMOS High, X is CMOS Low or High
Symbol
t_SCK
t_CS
t_CH
t_LS
t_LEW
t_LH
t_LES
Serial Interface Timing Characteristics
Parameter
Typical Performance
-40°C
25°C
+85°C
Min. Serial Clock Period
100
100
100
Min. Control Set-up Time
20
20
20
Min. Control Hold Time
20
20
20
Min. LE Set-up Time
10
10
10
Min. LE Pulse Width
10
10
10
Min. Serial Clock Hold Time from LE
10
10
10
Min. LE Pulse Spacing
630
630
630
Units
ns
ns
ns
ns
ns
ns
ns
5
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is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
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Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. _{M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make}
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.