MAX7032 Maxim Integrated Products, MAX7032 Datasheet - Page 8

• Manufacturer Part Number: MAX7032
• Description: ASK/FSK Transceiver
• Manufacturer: Maxim Integrated Products

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Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
8
(Typical Operating Circuit, PAV
4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.)
-12
-16
-20
1.6
1.2
0.8
0.4
_______________________________________________________________________________________
-4
-8
0
0
10.4
NORMALIZED IF GAIN vs. IF FREQUENCY
1
10.5
FSK DEMODULATOR OUTPUT
vs. IF FREQUENCY
IF FREQUENCY (MHz)
IF FREQUENCY (MHz)
10.6
90
80
70
60
50
40
30
20
10.7
10
1
f
RF
IMPEDANCE
vs. INDUCTIVE DEGENERATION
IMAGINARY
= 315MHz
10.8
INDUCTIVE DEGENERATION (nH)
INPUT IMPEDANCE
DD
10.9
= AV
11.0
100
10
DD
REAL IMPEDANCE
= DV
-12
-18
-24
-10
-20
Typical Operating Characteristics (continued)
-6
MAX7032 toc17
50
40
30
20
10
DD
0
0
200
0
= HV
100
SYSTEM GAIN vs. IF FREQUENCY
250
-220
-230
-240
-250
-260
-270
-280
-290
5
IN
S11 vs. RF FREQUENCY
RECEIVER
48dB IMAGE
REJECTION
= +3.0V, f
RF FREQUENCY (MHz)
IF FREQUENCY (MHz)
300
10
433.92MHz
350
15
RF
LOWER SIDEBAND
UPPER SIDEBAND
400
20
= 433.92MHz, T
f
TO MIXOUT
RF
FROM RFIN
= 434MHz
90
80
70
60
50
40
30
20
450
25
1
500
IMPEDANCE
vs. INDUCTIVE DEGENERATION
30
IMAGINARY
INDUCTIVE DEGENERATION (nH)
f
RF
INPUT IMPEDANCE
A
= 434MHz
REAL IMPEDANCE
= +25°C, IF BW = 280kHz, data rate =
48
46
44
42
-40
10
IMAGE REJECTION vs. TEMPERATURE
f
RF
-15
= 315MHz
S11 SMITH PLOT OF RFIN
434MHz
10
TEMPERATURE (°C)
MAX7032 toc18
400MHz
35
100
-150
-160
-170
-180
-190
-200
-210
-220
60
f
RF
500MHz
= 434MHz
85
110