MAPS-010163_15 Datasheet, PDF (6/8 Pages) M/A-COM Technology Solutions, Inc. – Digital Phase Shifter

MAPS-010163
Digital Phase Shifter
6-Bit, 1.4 - 2.4 GHz
Modes of Operation:
Serial and Direct Parallel
Rev. V5
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
P/S
LE
1
X
0
N/A
Mode
Serial
Direct Parallel
Truth Table (Digital Phase Shifter) ⁷
D6 D5 D4 D3 D2 D1 Phase Shift
0 0 0 0 0 0 Reference Phase
0 0 000 1
5.6°
0 0 001 0
11.2°
0 0 010 0
22.5°
0 0 100 0
45°
0 1 000 0
90°
1 0 000 0
180°
1 1 111 1
354.4°
7. 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
6
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