MC13135 MC13136
Figure 2. Supply Current versus Supply Voltage
6.0
I CC , SUPPLY CURRENT (mA)
RSSI OUTPUT (mVdc, Pin 12)
5.0
4.0
3.0
2.0
1.0
0
0
RFin = 49.7 MHz
fMOD = 1.0 kHz
fDEV =
±
3.0 kHz
1400
1200
1000
800
600
400
200
–140
VCC = 4.0 V
RFin = 49.67 MHz
fMOD = 1.0 kHz
fDEV =
±
3.0 kHz
Figure 3. RSSI Output versus RF Input
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
–120
–100
– 80
RF INPUT (dBm)
– 60
– 40
– 20
VCC, SUPPLY VOLTAGE (V)
C P , EQUIVALENT PARALLEL CAPACITANCE (pF)
25
20
15
10
CP, f = 50 MHz
5.0
RP, f = 150 MHz
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
CP, f = 150 MHz
RP, f = 50 MHz
10
8.0
6.0
4.0
2.0
0
4.0
R P , EQUIVALENT PARALLEL RESISTANCE (k
Ω
)
Figure 4. Varactor Capacitance, Resistance
versus Bias Voltage
Figure 5. Oscillator Frequency
versus Varactor Bias
48.0
47.5
f, FREQUENCY (MHz)
47.0
46.5
46.0
45.5
45.0
1.0
500 p
27 p
5.0 p
1
1st LO
2
24
23
0.61
µH
500 p
1.0 MΩ
0.2
µF
VB
Varicap
2.0
3.0
4.0
5.0
6.0
VB, VARACTOR BIAS VOLTAGE, VPin24 to VPin 23 (Vdc)
VB, VARACTOR BIAS VOLTAGE (Vdc)
Figure 6. Signal Levels versus RF Input
30
10
Second Mixer Output
POWER (dBm)
–10
–30
First Mixer Output
–50
Second Mixer Input
– 70
–100
– 90
– 80
– 70
– 60
– 50
– 40
– 30
– 20
First Mixer Input
S+N, N, AND AMR (dB)
10
0
–10
– 20
– 30
– 40
– 50
– 60
– 70
–130
Figure 7. Signal + Noise, Noise, and
AM Rejection versus Input Power
S+N
S + N 30% AM
VCC = 4.0 Vdc
RFin = 49.67 MHz
fMOD = 1.0 kHz
fDEV =
±
3.0 kHz
–110
– 90
– 70
N
– 50
– 30
RFin, RF INPUT (dBm)
RFin, RF INPUT (dBm)
4
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA, INC ]
