MC13158FTB View Datasheet(PDF) - LANSDALE Semiconductor Inc.

Part Name

Description

Manufacturer

MC13158FTB

Wideband FM IF Subsystem For Dect and Digital Applications

LANSDALE Semiconductor Inc. 

ML13158

Legacy Applications Information

RSSI

In Figure 22, the RSSI versus RF Input Level shows the linear

response of RSSI over a 65 dB range but it has extended capability

over 80 dB from –80 dBm to +10 dBm. The RSSI is measured in

the application circuit (Figure 12) in which a SAW filter is used

before the mixer; thus, the overall sensitivity is traded off for the

sake of selectivity. The curves are shown for three filters having

different bandwidths:

1) LCR Filter with 2.3 MHz 3.0 dBm BW (Circuit and

Component Placement is shown in Figure 12)

2) Series–Parallel Ceramic Filter with 650 kHz 3.0 dB BW

(Murata Part # KMFC - 545)

3) Ceramic Filter with 280 kHz 3.0 dB BW.

LANSDALE Semiconductor, Inc.

SINAD PERFORMANCE

Figure 24 shows a test setup for a narrowband demodulator output

response in which a C–message filter and an active de–emphasis

filter is used following the demodulator. The input is matched using

a 1:4 impedance transformer. The SINAD performance is shown in

Figure 25 with no preamp and in Figure 26 with a preamp

(Preamp–Figure 16). The 12 dB SINAD sensitivity is –101 dBm

with no preamp and –113 dBm with the preamp.

Page 18 of 23

www.lansdale.com

Issue B

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