mc13150ftb Lansdale Semiconductor, Inc., mc13150ftb Datasheet - Page 9

• Manufacturer Part Number: mc13150ftb
• Description: Narrowband Fm Coilless Detector If Subsystem
• Manufacturer: Lansdale Semiconductor, Inc.

LANSDALE Semiconductor, Inc.
Legacy Applications Information
Page 9 of 20
RF/IF
Input
100 n
NOTES: 1. Alternate solution is 1:4 impedance transformer (sources include Mini Circuits, Coilcraft and Toko).
IF Ceramic
2. 455 kHz ceramic filters (source Murata CFU455 series which are selected for various bandwidths).
3. For external LO source, a 51 Ω pullup resistor is used to bias the base of the on–board transistor as shown in Figure 15.
4. Enable IC by switching the pin to V EE .
5. The resistor is chosen to set the range of RSSI voltage output swing.
6. Details regarding the external components to setup the coilless detector are provided in the application section.
455 kHz
100 n
Designer may provide local oscillator with 3rd, 5th, or 7th overtone crystal oscillator circuit. The PC board is laid out to
accommodate external components needed for a Butler emitter coupled crystal oscillator (see Figure 16).
Filter
(2)
1.0 n
1.0 n
100 n
IF Ceramic
180 nH
455 kHz
(1)
Filter
1
2
3
4
5
6
7
8
32
V CC1
9
10 µ
V CC2
11 p
Mixer
IF
Figure 15. Application Circuit
10
31
+
V EE1
www.lansdale.com
11
30
Oscillator
100 n
Local
12
29
Limiter
100 n
100 n
LO Input
13
(3)
V CC
28
51
14
27
560 k
Buffer
RSSI
R B
15
26
(6)
16
V EE2
25
12 k
R F
150 k
24
23
22
21
20
19
18
17
R T
Coilless Detector
1.0 n
82 k
1.0 µ
C T
Circuit
(6)
Buffer
RSSI
R S
150 k
100 n
R L
150 k
Detector
(4)
Enable
(5)
RSSI
Output
ML13150
Issue A