Datasheet

MRF89XAM8A
DS70651A-page 24 Preliminary © 2010 Microchip Technology Inc.
TABLE 4-5: RECEIVER AC CHARACTERISTICS
(1)
Symbol Parameter Min Typ Max Unit Condition
RSF Sensitivity (FSK) — -107 — dBm 869 MHz, BR = 25 kbps,
f
dev
= 50 kHz, f
c
= 100 kHz
— -103 — dBm 869 MHz, BR = 66.7 kbps,
f
dev
= 100 kHz, f
c
= 200 kHz
RSO Sensitivity (OOK) — -113 — dBm 869 MHz, 2 kbps NRZ
f
c
– f
o
= 50 kHz, f
o
= 50 kHz
— -106 — dBm 869 MHz, 16.7 kbps NRZ
f
c
– f
o
= 100 kHz, f
o
= 100 kHz
CCR Co-Channel Rejection — -12 — dBc Modulation as wanted signal
ACR Adjacent Channel Rejection — 27 — dB Offset = 300 kHz, unwanted tone is
not modulated
— 52 — dB Offset = 600 kHz, unwanted tone is
not modulated
— 57 — dB Offset = 1.2 MHz, unwanted tone is
not modulated
BI Blocking Immunity — -48 — dBm Offset = 1 MHz, unmodulated
— -37 — dBm Offset = 2 MHz, unmodulated, no
SAW
— -33 — dBm Offset = 10 MHz, unmodulated, no
SAW
RXBWF Receiver Bandwidth in FSK
Mode
(2)
50 — 250 kHz Single side BW, Polyphase Off
RXBWU Receiver Bandwidth in OOK
Mode
(2)
50 — 400 kHz Single side BW, Polyphase On
ITP3 Input Third Order Intercept
Point
— -28 — dBm Interferers at 1 MHz and 1.950 MHz
offset
TSRWF Receiver Wake-up Time — 280 500 µs From FS to Rx ready
TSRWS Receiver Wake-up Time — 600 900 µs From Stand-by to Rx ready
TSRHOP Receiver Hop Time from Rx
Ready to Rx Ready with a
Frequency Hop
— 400 — µs 200 kHz step
— 400 — µs 1 MHz step
— 460 — µs 5 MHz step
— 480 — µs 7 MHz step
— 520 — µs 12 MHz step
— 550 — µs 20 MHz step
— 600 — µs 27 MHz step
RSSIST RSSI Sampling Time — — 1/f
dev
s From Rx ready
RSSTDR RSSI Dynamic Range — 70 — dB Ranging from sensitivity
Note 1: Guaranteed by design and characterization.
2: This reflects the whole receiver bandwidth, as described by conditions for active and passive filters.