Manual
MAX7033
315MHz/433MHz ASK Superheterodyne
Receiver with AGC Lock
_______________________________________________________________________________________ 5
Note 1: 100% tested at T
A
= +25°C. Guaranteed by design and characterization over temperature.
Note 2: IRSEL is internally set to 375MHz IR mode. It can be left open when the 375MHz image-rejection setting is desired. Bypass
to AGND with a 1nF capacitor in a noisy environment.
Note 3: BER = 2 x 10
-3
, Manchester encoded, data rate = 4kbps, IF bandwidth = 280kHz.
Note 4: Input impedance is measured at the LNAIN pin. Note that the impedance includes the 15nH inductive degeneration con-
nected from the LNA source to ground. The equivalent input circuit is 50Ω in series with 2.2pF.
Note 5: Crystal oscillator frequency for other RF carrier frequency within the 300MHz to 450MHz range is (f
RF
- 10.7MHz) / 64 for
XTALSEL = 0V, and (f
RF
- 10.7MHz) / 32 for XTALSEL = V
DD5
.
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, AV
DD
= DV
DD
= V
DD5
= +3.0V to +3.6V, all RF inputs are referenced to 50Ω, f
RF
= 315MHz, T
A
= -40°C
to +105°C, unless otherwise noted. Typical values are at AV
DD
= DV
DD
= V
DD5
= +3.3V and T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Load Capacitance C
LOAD
10 pF
Output High Voltage
V
DD5
V
Output Low Voltage 0V
CRYSTAL OSCILLATOR
V
XTALSEL
= 0V
6.6128
f
RF
= 433MHz
V
XTALSEL
= V
DD5
13.2256
V
XTALSEL
= 0V
4.7547
Crystal Frequency (Note 5) f
XTAL
f
RF
= 315MHz
V
XTALSEL
= V
DD5
9.5094
MHz
Crystal Tolerance 50
ppm
Input Capacitance From each pin to ground 6.2 pF
Typical Operating Characteristics
(Typical Application Circuit , AV
DD
= DV
DD
= V
DD5
= +3.3V, f
RF
= 315MHz, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7033 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.53.43.33.23.1
4.2
4.4
4.6
4.8
5.0
5.2
5.4
5.6
5.8
6.0
4.0
3.0 3.6
+85°C
+105°C
+25°C
-40°C
SUPPLY CURRENT
vs. RF FREQUENCY
MAX7033 toc02
RF FREQUENCY (MHz)
SUPPLY CURRENT (mA)
450400300 350
3.5
4.0
4.5
5.0
6.0
5.5
6.5
7.0
3.0
250 500
+105°C
+85°C
-40°C
+25°C
BIT-ERROR RATE
vs. PEAK RF INPUT POWER
MAX7033 toc03
PEAK RF INPUT POWER (dBm)
BIT-ERROR RATE (%)
-116-118-120-122-124-126-128
0.1
1
10
100
0.01
-130 -114
f
RF
= 433MHz
f
RF
= 315MHz