MAX1471 Maxim Integrated Products, MAX1471 Datasheet - Page 7

• Manufacturer Part Number: MAX1471
• Description: 3V/5V ASK/FSK Superheterodyne Receiver
• Manufacturer: Maxim Integrated Products

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(Typical Application Circuit, AV
PIN
1
2
3
4
5
-100
-110
-120
-50
-60
-70
-80
-90
NAME
XTAL2
90
80
70
60
50
40
30
20
10
OPA+
DSA+
DSA-
0
DFA
100
1
_______________________________________________________________________________________
PHASE NOISE vs. OFFSET FREQUENCY
f
IMAGINARY IMPEDANCE
RF
f
L1 = 0nH
RF
INPUT IMPEDANCE vs. INDUCTIVE
= 315MHz
= 315MHz
INDUCTIVE DEGENERATION (nH)
1k
REAL IMPEDANCE
OFFSET FREQUENCY (Hz)
Inverting Data Slicer Input for ASK Data
Noninverting Data Slicer Input for ASK Data
Noninverting Op-Amp Input for the ASK Sallen-Key Data Filter
Data-Filter Feedback Node. Input for the feedback of the ASK Sallen-Key data filter.
2nd Crystal Input
DEGENERATION
DD
10k
ASK/FSK Superheterodyne Receiver
= DV
315MHz/434MHz Low-Power, 3V/5V
10
100k
DD
= HV
1M
MAX1471 toc17
IN
Typical Operating Characteristics (continued)
= +3.0V, f
10M
100
-125
-150
-175
-200
-225
-250
-275
-300
-325
-350
RF
= 434MHz, T
FUNCTION
-100
-110
-120
-50
-60
-70
-80
-90
A
90
80
70
60
50
40
30
20
10
0
= +25°C, unless otherwise noted.)
100
1
PHASE NOISE vs. OFFSET FREQUENCY
f
f
L1 = 0nH
RF
RF
INPUT IMPEDANCE vs. INDUCTIVE
= 434MHz
= 434MHz
IMAGINARY
IMPEDANCE
INDUCTIVE DEGENERATION (nH)
1k
OFFSET FREQUENCY (Hz)
DEGENERATION
10k
REAL IMPEDANCE
10
100k
Pin Description
1M
MAX1471 toc18
10M
100
-125
-150
-175
-200
-225
-250
-275
-300
-325
-350
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