Rainbow Electronics MAX2442 - Manual (Page 6)

550
500
0
1 1k 10k 100 100k
PRESCALER OUTPUT LEVEL
vs. LOAD RESISTANCE
100
50
MAX2440/1/2-13
LOAD RESISTANCE ( Ω)
PRESCALER OUTPUT LEVEL (mVp-p)
200
150
350
300
250
450
400
LOAD IS PLOTTED RESISTANCE
IN PARALLEL WITH A 10pF
OSCILLOSCOPE PROBE
(÷ 64/65 MODE)
MAX2440/MAX2441/MAX2442
900MHz Image-Reject Receivers
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(MAX242X/MAX246X EV kit, V CC = +3.3V; f LO = 925.7MHz (MAX2440), f LO = 961MHz (MAX2441), f LO = 985MHz (MAX2442),
f RXIN = 915MHz; P RXIN = -35dBm; V LNAGAIN = 2V; V VCOON = 2.4V; RXON = V CC ; MOD = DIV1 = PREGND = GND; T A = +25°C,
unless otherwise noted.)
-20
10
-10
0
30
20
50
40
60
0 400 800 1200 1600 2000
RECEIVER IMAGE REJECTION
vs. RF FREQUENCY
MAX2440/1/2-10
RF FREQUENCY (MHz)
IMAGE REJECTION (dB)
RXON = V CC
40
0
1 1000 100 10
RECEIVER IMAGE REJECTION
vs. IF FREQUENCY
20
15
10
5
30
25
35
MAX2440/1/2-11
IF FREQUENCY (MHz)
IMAGE REJECTION (dB)
MAX2440
MAX2441
MAX2442
0
25
30
15
20
10
5
35
40
45
50
-0
-60
-40
-20
-80
-100
800 600 1000 1200 1400
RXIN INPUT IMPEDANCE
vs. FREQUENCY
MAX2440/1/2-12
FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
REAL
IMAGINARY
IMAGINARY IMPEDANCE (
Ω
)