LRI64-SBN18/2GE STMicroelectronics, LRI64-SBN18/2GE Datasheet - Page 11

• Manufacturer Part Number: LRI64-SBN18/2GE
• Manufacturer: STMicroelectronics

Specifications of LRI64-SBN18/2GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Not Compliant

LRI64
5
Communication signal from VCD to LRI64
Communications between the VCD and the LRI64 involves a type of amplitude modulation
called amplitude shift keying (ASK).
The LRI64 only supports the 10% modulation mode specified in ISO 15693 and ISO 18000-
3 Mode 1 standards. Any request that the VCD might send using the 100% modulation
mode, is ignored, and the LRI64 remains in its current state. However, the LRI64 is, in fact,
operational for any degree of modulation index from between 10% and 30%.
The modulation index is defined as (a-b)/(a+b) where a and b are the peak and minimum
signal amplitude, respectively, of the carrier frequency, as shown in
Table 2.
Figure 4.
Figure 5.
Parameter
75.52 µs
a
10% modulation parameters
10% modulation waveform
“1-out-of-4” coding example
10
hr
hf
tRFF
tRFSFL
b
tRFR
75.52 µs
00
Min
–
–
Communication signal from VCD to LRI64
75.52 µs
hr
01
Figure
0.1 x (a-b)
0.1 x (a-b)
hf
Max
4.
75.52 µs
11
AI06655B
AI06659B
11/49
t