Rainbow Electronics MAX7032 - Manual (Page 11)

MAX7032
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
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EFFICIENCY vs. SUPPLY VOLTAGE
MAX7032 toc32
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
3.3 3.0 2.7 2.4
15
20
25
30
10
2.1 3.6
T A = +85 °C
T
A
= +125 °C
T A = +25 °C
T A = -40 °C
f
RF
= 315MHz
50% DUTY CYCLE
EFFICIENCY vs. SUPPLY VOLTAGE
MAX7032 toc33
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
3.3 3.0 2.7 2.4
20
25
30
15
2.1 3.6
T A = +85 °C
T A = +125 °C
T A = +25 °C
T A = -40 °C
f
RF
= 434MHz
50% DUTY CYCLE
PHASE NOISE vs. OFFSET FREQUENCY
MAX7032 toc34
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M 100k 10k 1k
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-140
100 10M
f RF = 315MHz
PHASE NOISE
vs. OFFSET FREQUENCY
MAX7032 toc35
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M 100k 10k 1k
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-140
100 10M
f RF = 434MHz
REFERENCE SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX7032 toc36
SUPPLY VOLTAGE (V)
REFERENCE SPUR MAGNITUDE (dBc)
3.3 3.0 2.7 2.4
-65
-60
-55
-50
-45
-40
-70
2.1 3.6
433.92MHz
315MHz
FREQUENCY STABILITY
vs. SUPPLY VOLTAGE
MAX7032 toc37
SUPPLY VOLTAGE (V)
FREQUENCY STABILITY (ppm)
3.3 3.0 2.7 2.4
-8
-6
-4
-2
0
2
4
6
8
10
-10
2.1 3.6
f RF = 315MHz
f RF = 434MHz
CLKOUT SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX7032 toc38
SUPPLY VOLTAGE (V)
CLKOUT SPUR MAGNITUDE (dBc)
3.3 3.0 2.7 2.4
-64
-62
-60
-58
-56
-66
2.1 3.6
f CLKOUT = f XTAL / 8
f CLKOUT = f XTAL / 2
f CLKOUT = f XTAL / 4
f
RF
= 434MHz
CLKOUT SPUR = f RF
± f
CLKOUT
10pF LOAD CAPACITANCE
Typical Operating Characteristics (continued)
(Typical Operating Circuit, PAV DD = AV DD = DV DD = HV IN = +3.0V, f RF = 433.92MHz, T A = +25°C, IF BW = 280kHz, data rate =
4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.)
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