MC13156DW Freescale Semiconductor, MC13156DW Datasheet - Page 15

• Manufacturer Part Number: MC13156DW
• Manufacturer: Freescale Semiconductor

Specifications of MC13156DW

• Pin Count: 24
• Screening Level: Industrial
• Package Type: SOIC W
• Lead Free Status / Rohs Status: Supplier Unconfirmed

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005
45 MHz Narrowband Receiver
this section a narrowband receiver with a 455 kHz IF will be
described. Figure 23 shows a full schematic of a 45 MHz
receiver that uses a 3rd overtone crystal with the on–chip
oscillator transistor. The oscillator configuration is similar to
the one used in Figure 17; it is called an impedance inversion
Colpitts. A 44.545 MHz 3rd overtone, series resonant crystal
is used to achieve an IF frequency at 455 kHz. The ceramic
IF filters selected are Murata Erie part # SFG455A3. 1.2 k
chip resistors are used in series with the filters to achieve the
terminating resistance of 1.4 k
decoupling is very important; 0.1 F chip capacitors are used
at Pins 6, 7, 11 and 12. The quadrature detector tank circuit
uses a 455 kHz quadrature tank from Toko.
MOTOROLA WIRELESS SEMICONDUCTOR
SOLUTIONS – RF AND IF DEVICE DATA
NOTES: 1. 0.33 H Variable Shielded Inductor: Coilcraft part # 7M3–331 or equivalent.
RF Input
The above application examples utilize a 10.7 MHz IF. In
45 Hz
V CC
2. 455 kHz Ceramic Filter: Murata Erie part # SFG455A3.
3. 455 kHz Quadrature Tank: Toko part # 7MC8128Z.
4. 3rd Overtone, Series Resonant, 25 PPM Crystal at 44.540 MHz.
5. 0.416 H Variable Shielded Inductor: Coilcraft part # 143–10J12S.
6. 1.8 H Molded Inductor.
SMA
180 p
(2) 455 kHz
(2) 455 kHz
0.1
Ceramic
0.1
Ceramic
33 p
Filter
Filter
10 n
0.1
0.1
(1)
0.33 H
1.2 k
1.2 k
Freescale Semiconductor, Inc.
Figure 23. MC13156DW Application Circuit at 45 MHz
For More Information On This Product,
to the filter. The IF
10
11
12
1
2
3
4
5
6
7
8
9
V CC
V CC
Go to: www.freescale.com
Mixer
LIM Amp
IF Amp
Bias
MC13156
Bias
Slicer
Data
5.0 p
1.0 kHz and a f dev = 4.0 kHz. The RSSI dynamic range is
approximately 80 dB of linear range (see Figure 24).
Receiver Design Considerations
application receiver with respect to RF input level are shown
in Figure 28. This information helps determine the network
topology and gain blocks required ahead of the MC13156 to
achieve the desired sensitivity and dynamic range of the
receiver system. In the application circuit the input third order
intercept (IP3) performance of the system is approximately
–25 dBm (see Figure 29).
V EE
The 12 dB SINAD performance is –109 dBm for a f mod =
The curves of signal levels at various portions of the
V EE
V EE
+
27 k
24
23
22
21
20
19
18
17
16
15
14
13
1.0
1.0 n
1.8 H
47 k
180 p
39 p
100 n
(6)
56 p
10 n
10 k
100 k
100 k
10 k
100 k
(5) 0.416 H
+
10 n
1.0
10 n
10 n
(3)
680 H
V CC = 2.0 to 5.0 Vdc
470 k
Carrier
Detect
RSSI
Output
Data Slicer
Hold
Data
Output
Audio To
C–Message
Filter and
Amp.
(4) 3rd OT
XTAL
44.545
MHz
15