ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 98
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ATA559001-DBW
Manufacturer Part Number
ATA559001-DBW
Description
RF Wireless Misc UHF (1kbit r/w anti- collis. Ni-Au)
Manufacturer
Atmel
Datasheet
1.ATA559001-6DSY.pdf
(107 pages)
Specifications of ATA559001-DBW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ATA5590
Table 14-4.
The minimum time for T
width of 250 kHz is 4 µs (sine transition between the two states of the modulation equals half of
one period). When using the ASK or AM method, this minimum time is 8 µs.
This time must be changeable if other bandwidths are needed (200 kHz or 100 kHz). In the case
of 100 kHz, the bandwidth is larger (1 MHz). Therefore, this time can be shorter (2 µs for
ASK/AM, and 1 µs for PR-ASK).
A typical notch that is received by the detection circuit of the tag is shown in
Figure 14-4. Notch Timing
Typical values are for T1 = 4 µs and for T
in
Parameter
U
U
T
T
Minimum T
Figure 14-5 on page
notch1
notch1
notch_on
notch_off
notch1
Typical Values for Notch Detection Threshold Voltages and Timings at 25°C
V
0V
sig
V
sig
99:
Value
notch
> 4
> 8
0.5
0.8
1
= 450 to 600 mV for V
is given by ETSI. By using PR-ASK, the theoretical limit for a band-
Unit
µs
µs
µs
V
V
Comment
Relative value (see
Relative value (see
PR-ASK modulation scheme, cosine shape restrictions are
given by ETSI, 250-kHz bandwidth
ASK modulation scheme (250-kHz bandwidth cosine shape)
Released in the circuit, but depends also on the distance
(power), and the shape of the transition
notch
T
T1
= 2 µs. The output of the detection circuit is shown
notch
dd
=1.8V
Figure 14-3 on page
Figure 14-3 on page
Figure
97)
97)
4817C–RFID–03/07
14-4:
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