Rainbow Electronics AT86RF211 - Manual (Page 43)

43
AT86RF211
1942C–WIRE–06/02
Synthesizer
Specification Unless otherwise specified, data is given for T = 25°C, V
SUPPLY
= 2.7V
ii
Notes: 1. Crystal frequency can be slightly changed but since IF2 = IF1 - Crystal frequency, IF2 will shift and must remain within the
IF2 filter and discriminator bandwidth.
2. With the "typical implementation" loop filter.
Receiver Specification Unless otherwise specified, data is given for T = 25°C V
SUPPLY
= 2.7V
Note: 1. The overall sensitivity depends on measurements conditions and external components, i.e.:
-100 dBm for BW = ± 10 kHz,
∆
F = ± 7.5 kHz, Brate = 4800 bps with RF switch used and external SAW filter
Parameter Min Typ Max Unit Comments
Frequency Range 400 480 MHz Digital programming
Frequency Range 800 950 MHz Digital programming
Crystal Frequency 10.235 10.245 10.255 MHz IF 1 = 10.7 MHz (1)
Crystal Frequency 20.925 20.945 20.965 MHz IF 1 = 21.4 MHz (1)
Oscillator Settling Time 5 8 ms Depending on crystal
specifications
Lock Time (2) 300 µs From oscillator settling
Lock Time (2) 30 µs 100 kHz shift
Phase Noise 400 to 480 MHz -80 dBc/Hz At 10 kHz from the carrier
Phase Noise 800 to 950 MHz -75 dBc/Hz At 10 kHz from the carrier
Phase Noise 400 to 480 MHz -91 dBc/Hz At 100 kHz from the carrier
Phase Noise 800 to 950 MHz -86 dBc/Hz At 100 kHz from the carrier
Parameter Min Typ Max Unit Comments
IF1 10.7 MHz 21.4 MHz also possible
IF1 Filter Impedance 330
Ω
IF2 455 kHz
IF2 Filter Impedance 1700
Ω
FSK Sensitivity -105 dBm Typical performance with a BER of 1% at input pin
RXIN (45). BW = ± 10 kHz,
∆
F = ± 7.5 kHz; Brate =
4800 bps (1)
Noise Figure 15 dB Input matched, complete RX chain
Input IP3 -15 dBm
Max Input Power -5 dBm BER < 10%