Rainbow Electronics MAX7030 - Manual (Page 7)

MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
_______________________________________________________________________________________ 7
INPUT IMPEDANCE
vs. INDUCTIVE DEGENERATION
MAX7030 toc14
INDUCTIVE DEGENERATION (nH)
REAL IMPEDANCE (
Ω
)
10
30
40
50
60
70
80
90
20
IMAGINARY IMPEDANCE (
Ω
)
-210
-200
-190
-180
-170
-160
-150
-220
1 100
f RF = 434MHz
IMAGINARY
IMPEDANCE
REAL IMPEDANCE
PHASE NOISE vs. OFFSET FREQUENCY
MAX7030 toc15
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M 100k 10k 1k
-110
-100
-90
-80
-70
-60
-50
-120
100 10M
f
RF
= 315MHz
PHASE NOISE vs. OFFSET FREQUENCY
MAX7030 toc16
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
-110
-100
-90
-80
-70
-60
-50
-120
f
RF
= 433MHz
1M 100k 10k 1k 100 10M
Typical Operating Characteristics (continued)
(Typical Operating Circuit, PAV DD = AV DD = DV DD = HV IN = +3.0V, f RF = 433.92MHz, IF BW = 280kHz, 4kbps Manchester encoded,
0.2% BER, T A = +25°C, unless otherwise noted.)
RECEIVER
INPUT IMPEDANCE
vs. INDUCTIVE DEGENERATION
MAX7030 toc13
INDUCTIVE DEGENERATION (nH)
REAL IMPEDANCE (
Ω
)
10
30
40
50
60
70
80
90
20
IMAGINARY IMPEDANCE (
Ω
)
-280
-270
-260
-250
-240
-230
-220
-290
1 100
f
RF
= 315MHz
IMAGINARY
IMPEDANCE
REAL IMPEDANCE