ATA5811-PLQW Atmel, ATA5811-PLQW Datasheet - Page 50

• Manufacturer Part Number: ATA5811-PLQW
• Description: RF Transceiver RF DATA CONTROL Transceiver
• Manufacturer: Atmel

Specifications of ATA5811-PLQW

• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Mounting Style: SMD/SMT
• Package / Case: QFN-48 EP
• Minimum Operating Temperature: - 40 C
• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 7mm
• Product Height (mm): 0.9mm
• Product Length (mm): 7mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.1.1
11.1.2
11.1.3
50
ATA5811/ATA5812
RX Polling Mode
Sleep Mode
Start-up Mode
If the transceiver is in RX polling mode it stays in a continuous cycle of three different modes. In
sleep mode the RF transceiver is disabled for the time period T
of I
cuits are enabled and settled. In the following Bit-check mode, the incoming data stream is
analyzed bit by bit contra a valid transmitter signal. If no valid signal is present, the transceiver is
set back to sleep mode after the period T
tistical process. An average value for T
T
consumption is I
RX_ACTIVE (see
consumption in RX polling mode I
car application. To calculate I
VS2 in 2 battery application or VS2, VAUX in car application (see section
tics: General” on page
To save current it is recommended CLK and V
not include the current of the Microcontroller_Interface I
device connected to pin VSOUT (e.g., microcontroller). If CLK and/or VSOUT is enabled during
RX polling mode the current consumption is calculated as follows:
During T
nal. To guarantee the reception of a transmitted command the transmitter must start the
telegram with an adequate preburst. The required length of the preburst T
polling parameters T
actual bit rate and the number of bits (N
The length of period T
factor X
calculated to be:
In US and European applications, the maximum value of T
(which is done by setting the bit XSleep in control register 4 to 0). The time resolution is about
1.2 ms in that case. The sleep time can be extended to about 300 ms by setting X
(which is done by setting XSleep in control register 4 to 1), the time resolution is then about
9.6 ms.
During T
circuit starts up (T
ready to receive.
I
I
T
T
P
S_Poll
Startup_PLL
Preburst
Sleep
=
S
= I
I
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
IDLE_X
=
=
IDLE_X
Sleep
I
Sleep
Sleep
Startup_PLL
P
T
+
Sleep
the current consumption is I
I
defined by the bit XSleep in control register 4 and the basic clock cycle T
. During the start-up period, T
, T
VSINT
T
Sleep
+
Startup_PLL
1024
T
S
+
Startup_PLL
the PLL is enabled and starts up. If the PLL is locked, the signal processing
Figure 11-1 on page 51
Startup_Sig_Proc
+
= I
I
T
Sleep
EXT
I
Sleep
Startup_PLL_X
Sleep
Startup_Sig_Proc_X
63)
T
, T
DCLK
and T
+
Startup_PLL
is defined by the 5-bit word sleep in control register 4, the extension
T
+
Startup_PLL
T
P
Startup_Sig_Proc
Startup_Sig_Proc
the index X must be replaced by VS1, 2 in 1 battery application,
X
). After the start-up time all circuits are in stable condition and
Sleep
P
T
, T
is different in 1 battery application, 2 battery application or
Startup_PLL
+
Startup_Sig_Proc
. The condition of the transceiver is indicated on pin
S
T
Bit-check
Bit-check
Bit-check
= I
Startup_Sig_Proc
Startup_PLL
and
+
RX_X
the transceiver is not sensitive to a transmitter sig-
T
+
VSOUT
Bit_check
I
. This period varies check by check as it is a sta-
) to be tested
is given in the electrical characteristics. During
. During T
RX_X
Figure 11-2 on page
and T
be disabled during RX polling mode. I
and T
+
T
T
Startup_Sig_Proc
Bit-check
Bit_check
Startup_Sig_Proc
Startup_Sig_Proc
Sleep
VSINT
Sleep
is about 38 ms if X
. Thus, T
and the current of an external
while consuming low current
+
52). The average current
, all signal processing cir-
T
and T
Bit-check
Bitcheck
“Electrical Characteris-
Preburst
Bit-check
depends on the
depends on the
Sleep
4689F–RKE–08/06
the current
is set to 1
DCLK
Sleep
P
. It is
does
to 8