Analog Devices ADRV9002

UG-1828 Preliminary Technical Data
Rev. PrB | Page 96 of 277
Delay Parameter Descriptions Bounds Notes
analogGuardTime
Minimum time between the
hop edge and analog power
up to prevent Rx and Tx FE
being powered up at the
same time.
N/A Min/max: 0.15 µs
enableRiseToAnalogOnDelay
(tRxEnaRiseToAnaOn)
Delays the power up of the
AFE relative to the hop
edge.
Min: analogGuardTime
Max: -
No power saving implies Rx analog power
up can commence immediately.
The minimum time of this delay is the
analogGuardTime.
enableGuardDelay
(tRxGT1)
Delay between hop edge
and first valid data received
over the air.
Min: enableRiseToOnDelay
+ enableSetupDelay
Max: 0
Not used currently but can be used to delay
starting of the tracking algorithms until the
first valid data is received over the air.
enableHoldDelay
(tRxEnaHold)
Delay between the hop
edge and disabling of the
Rx interface.
propagationDelay
At the end of an Rx frame, or a sequence of
Rx frames, the interface can be left, even
into the next frame, to allow for
propagation delay.
enableFallToOffDelay
Delay between hop edge
and powering down the
LNA. Not used in frequency
hopping.
Min: 0
Max: 0
Hop edge indicates the end of frame on air.
The analog and Rx LNA can be powered
down immediately.
TRx Timing
Rx
Tx
Tx
Rx
Tx ON: ANTENNA SWITCH
Rx ON: LNA POWER OUT
Rx FRAMING ON AIR
Rx FRAMING AT BBIC
Tx FRAMING ON AIR
Tx FRAMING AT BBIC
PIN: HOP
PIN: Rx SETUP
PIN: Tx SETUP
Tx INTERFACE
Rx INTERFACE
Tx ANALOG POWER
Rx ANALOG POWER
24159-492
Figure 96. TRx Timing
For TRx operation, because a hop edge can mark both the start and end of an Rx or Tx frame, the ADRV9001 guarantees that the Rx
front end and Tx front end are not powered up at the same time.
To achieve this, ADRV9001 enforces a minimum setting for RxRiseToAnaOn, specified by analogGuardTime, to ensure that the Rx front
end is powered up after the Tx front end is powered down.
No minimum setting for TxRiseToAnaOn is required. This is because the Rx front end is always powered down before the Tx front end
power up routine starts, and no extra delay is required.