ATA5283_07 ATMEL [ATMEL Corporation], ATA5283_07 Datasheet - Page 7

• Manufacturer Part Number: ATA5283_07
• Description: Interface IC for 125 kHz Wake-up Function
• Manufacturer: ATMEL [ATMEL Corporation]

3.8
3.9
Figure 3-6.
4598H–AUTO–03/07
controller
Central
board
Standby Listen Mode
Applications
UHF Rx
T5743
Application
ATA5275
Antenna
driver
In the standby listen mode the IC monitors the coil input with a very low current consumption.
The automatic gain control is switched off and the gain is set to the maximum value. The
N_DATA and the N_WAKEUP output are set to a high level.
Before the controller enters its standby mode after the communication, it should activate the
standby listen mode of the ATA5283 with a reset signal. This measure ensures that the IC
enters the power saving standby mode and that the IC wakes the controller correctly with the
next preamble signal.
Figure 3-6
nant circuit the ATA5283 is used as wake-up receiver for the microcontroller and the connected
temperature- and pressure-sensor.
Note:
125 kHz
433 kHz
To avoid supply voltage ripples to affect the microcontroller, an RC filter (R1 = 100 , C1 = 10 nF)
is recommended.
shows a typical TPM application of the ATA5283. Combined with the antenna reso-
LA
CA
1
2
3
UHF Tx
Vref
Amplifier
with
AGC
8
4
ATA5283
5
7
6
RESET
N_WAKEUP
N_DATA
C1
R1
controller
Micro
ATAR862
ATA5283
Pressure
sensor
sensor
Temp.
7