Datasheet

Pin Description
PIN NAME FUNCTION
1 XTAL1 Crystal Input 1
2, 7 AVDD
Positive Analog Supply Voltage. For +5V operation, pin 2 is the output of an on-chip +3.4V low-
dropout regulator, and should be bypassed to AGND with a 0.1μF capacitor as close as possible to
the pin. Pin 7 must be externally connected to the supply from pin 2, and bypassed to AGND with a
0.01μF capacitor as close as possible to the pin (see the Voltage Regulator section and the Typical
Application Circuit).
3 LNAIN Low-Noise Amplifier Input. See the Low-Noise Amplifier section.
PHASE NOISE
vs. OFFSET FREQUENCY
MAX7033 toc13
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M100k10k1k100
-120
-100
-80
-60
-40
-20
0
-140
10 10M
f
RF
= 315MHz
PHASE NOISE
vs. OFFSET FREQUENCY
MAX7033 toc14
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M100k10k1k100
-120
-100
-80
-60
-40
-20
0
-140
10 10M
f
RF
= 433.92MHz
MAX7034
315MHz/434MHz ASK Superheterodyne
Receiver
Typical Operating Characteristics (continued)
( Typical Application Circuit , V
DD5
= +5.0V, f
RF
= 433.92MHz, T
A
= +25°C, unless otherwise noted.)
NORMALIZED IF GAIN
vs. IF FREQUENCY
MAX7034 toc10
IF FREQUENCY (MHz)
NORMALIZED IF GAIN (dB)
10
-25
-20
-15
-10
-5
0
5
-30
1 100
S
11
MAGNITUDE PLOT OF RFIN
vs. FREQUENCY
MAX7034 toc11
FREQUENCY (MHz)
S
11
MAGNITUDE (dB)
470440380 410260 290 320 350230
-40
-30
-20
-10
0
10
20
30
40
50
-50
200 500
315MHz
-24.1dB
S
11
SMITH CHART PLOT OF RFIN
MAX7034 toc12
500MHz
200MHz
WITH INPUT
MATCHING
315MHz
6