T2526 Datasheet, PDF (8/12 Pages) ATMEL Corporation – LOW-VOLTAGE IR RECEIVER ASSP

Figure 9. Typical Bandpass Curve
1.10
1.00
V_S = 3 V
0.90
0.80
0.70
Bandwidth (-3 dB)
0.60
0.50
0.40
0.92 0.94 0.96 0.98 1.00 1.02 1.04 1.06 1.08
f/f ₀
Q = f/f₀/B; B => -3 dB values.
Example: Q = 1/(1.047 - 0.954) = 11
Figure 10. Illustration of Used Terms
Example: f = 30 kHz, burst with 16 pulses, 16 periods
1066 µs
Period (P = 16)
IN
533 µs
Burst (N = 16 pulses)
1
7
16
7
7
OUT
OUT
t_DON
t_DOFF
33 µs
Envelope 1
533 µs
Data word
17 ms
17056 µs/data word
Telegram pause
TREF = 62 ms
Data word
Envelope 16
8 T2526
4597C–AUTO–11/03