ATA8202-PXQW Atmel, ATA8202-PXQW Datasheet - Page 27

• Manufacturer Part Number: ATA8202-PXQW
• Description: RF Wireless Misc Switchable Rx-IC f/Industrial(433MHz)
• Manufacturer: Atmel

Specifications of ATA8202-PXQW

• Package / Case: QFN-24
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8. Polling Current Calculation
4971C–INDCO–04/09
Figure 8-1.
In an industrial or aftermarket RKE and TPM system, the average chip current in Polling mode,
I
controller via the pins ENABLE and RX. The polling current can be calculated as follows:
I
(T
T
T
T
T
T
I
I
I
Example:-
Polling
Polling
Startup_PLL
Active
Standby
Polling_Period
Startup_PLL
Startup_Sig_Proc
Bitcheck
Polling_Period
ENABLE
Bitcheck
I
Supply
:
, is an important parameter. The polling period must be controlled by the connected micro-
:
RX
= (T
:
:
/ T
:
Startup_PLL
:
Polling_Period
:
I
Polling Cycle
Standby
I
Active
/ T
depends on 315 MHz/433.92 MHz application.
depends on 315 MHz/433.92 MHz application and the selected bit
rate range.
depends on the signal bit rate (1 / Signal_Bit_Rate).
depends on the transmitter telegram (preburst).
depends on 3V or 5V application and the setting of pin CLK_OUT.
depends on 3V or 5V application, ASK or FSK mode and the setting of
pin CLK_OUT.
depends on 3V or 5V application and the setting of pin CLK_OUT.
315-MHz application (ATA8201), bit rate: 9.6 Kbits/s, T
--> T
--> T
--> T
3V application; ASK mode, CLK_OUT disabled
--> I
--> I
--> I
--> I
)
Polling_Period
Startup_PLL
Active
Standby
Polling
Startup_PLL
Startup_Sig_Proc
Bitcheck
T
T
T
I
Bitcheck
Startup_Sig_Proc
Startup_PLL
Active
= 0.545 mA
I
Standby
+ (T
(= 1 / Signal_Bitrate (average)
)
(Startup RF-PLL)
Polling_Period
I
Startup_PLL
(Startup Signal Processing)
=
=
=
=
=
=
– T
+ (T
Startup_PLL
269 µs
324 µs
104 µs
4.5 mA
6.5 mA
0.05 mA
Startup_Sig_Proc
ATA8201/ATA8202
I
Standby
– T
(Bit Rate Range 3)
Startup_Sig_Proc
/ T
Polling_Period
Polling_Period
I
Active
– T
)
Bitcheck
= 8 ms
I
Active
) /
27
+