Cmos Synchronous-Serial Interface (Cmos-Ssi) - Analog Devices ADRV9001 User Manual

Reference Manual
DATA INTERFACE
Table 22. CSSI Electrical Specification (Continued)
Symbol Parameter
V Output-voltage low
OL
f Clock frequency
CLK
C at 80 MHz Load capacitance supported for an 80
L
MHz clock waveform
Table 23. LSSI Electrical Specification
Symbol Parameter
VDIGIO_1P8 Interface power supply voltage
V Input voltage range
I
V Input differential threshold
IDTH
R Receiver differential input impedance
IN
V Output-voltage high
OH
V Output-voltage low
OL
|V | Output differential voltage
OD
V Output offset voltage
OS
R Output impedance, single-ended
O
I , I Output current
SA SB
I Output current
SAB
Clock signal duty cycle
T ,T Output Rise/Fall Time
R F

CMOS SYNCHRONOUS-SERIAL INTERFACE (CMOS-SSI)

One-Lane Mode CSSI
Receive CSSI
The one-lane mode receives CSSI of each channel (Rx1 and Rx2). These are a 3-wire digital interface consisting of:
RX_DCLK_OUT: output clock synchronizing data and strobe output signals.
►
RX_STROBE_OUT: output signal indicating the first bit of the serial data sample.
►
RX_DATA_OUT: output serial data stream.
►
The I and Q samples are serialized starting with configurable I or Q first and MSB or LSB first.
for a 16-bit I/Q data sample with I sample and MSB first configuration.
The RX_STROBE_OUT signal is aligned with the first bit of the serialized data (I and Q), and can be configured to be high:
For one clock cycle at the start of I and Q sample transmit. For a 16-bit data sample, RX_STROBE is high for one clock cycle and low for 31
►
clock cycles.
analog.com
Min
Figure 31. Receive CSSI Timing for 16-Bit I/Q Data Sample (I and MSB First)
Typ Max
0.45
80
10 30
Conditions
R = 100 Ω ± 1%
LOAD
R = 100 Ω ± 1%
LOAD
R = 100 Ω ± 1%
LOAD
R = 100 Ω ± 1%
LOAD
Driver shorted to ground
Drivers shorted together
500 MHz
300 mVp swing
Figure 31
ADRV9001
Units
V
MHz
pF
Min Typ Max
1.71 1.8 1.89
825 1675
−100 +100
100
1390
1000
360
1150 1200 1250
80 100 120
17
4.1
45 50 55
0.371
shows the receive CSSI (Rx1 and Rx2)
Rev. 0 | 61 of 351
Units
V
mV
mV
Ω
mV
mV
mV
mV
Ω
mA
mA
%
nsec