ATA5278-PKQI Atmel, ATA5278-PKQI Datasheet - Page 14

IC ANTENNA DVR STAND-ALONE 28QFN

ATA5278-PKQI

Manufacturer Part Number
ATA5278-PKQI
Description
IC ANTENNA DVR STAND-ALONE 28QFN
Manufacturer
Atmel
Type
Stand Alone Antenna Driverr
Datasheet

Specifications of ATA5278-PKQI

Rf Type
TPM
Frequency
125kHz
Package / Case
28-VFQFN
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
ATA5278-PKQITR
Figure 3-9.
Figure 3-10. LF Data Modulation with PSK
14
ATA5278
MODACTIVE pin
MODACTIVE pin
LF Data Modulation with ASK
Driver control
Driver control
Driver control
Driver control
Resulting
Resulting
antenna
antenna
Half bit
Half bit
values
values
signal
signal
signal
signal
input
input
The LF data stream in
get this result, a hex value of 0F6h has to be written into the data buffer via the SPI. The time
value t
configuration register 2. Note that the MODACTIVE pin is active even if the half bit at the modu-
lator stage is “0”.
In PSK mode (NASK_PSK = 1), the phase of the carrier signal is shifted by 180° on any change
of the LF data in the buffer. Taking the same data sequence as in the previous example, the dia-
gram changes shown in
X
X
Start of modulation
Start of modulation
Bitrate
t
t
Bitlength
Bitlength
0
0
t
t
/2
Bitlength
is the period of one logical bit, which is defined by the selected data baud rate in
/2
Bitlength
1
1
Figure 3-9
Figure
1
1
3-10.
has a length of four logical bits and therefore eight half bits. To
0
0
1
1
1
1
1
1
End of modulation
End of modulation
1
1
X
X
4832D–RKE–12/07

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