PRELIMINARY
CYW43438
18. FM Receiver Specifications
Note: Values in this data sheet are design goals and are subject to change based on the results of device characterization.
Unless otherwise stated, limit values apply for the conditions specified inTable 22: “Environmental Ratings” and
Table 24: “Recommended Operating Conditions and DC Characteristics” . Typical values apply for the following conditions:
■ VBAT = 3.6V.
■ Ambient temperature +25°C.
Table 35. FM Receiver Specifications
Parameter
Operating frequency2
Sensitivity3
Conditions1
RF Parameters
Minimum Typical Maximum
Units
Frequencies inclusive
65
–
–
1
108
–
MHz
dBμV EMF
µV EMF
dBμV
FM only, SNR ≥ 26 dB
–
1.1
–5
–
–
–
Measured for 30 dB SNR at audio output.
Signal of interest: 23 dBµV EMF (14.1 µV EMF).
Receiver adjacent channel
selectivity3,4
At ±200 kHz.
At ±400 kHz.
–
–
51
62
–
–
dB
dB
Intermediate signal-plus-
noise to noise ratio (S + N)/ Vin = 20 dBμV (10 μV EMF).
45
53
55
–
–
–
–
dB
dBc
dB
N, stereo3
Blocker level increased until desired at
30 dB SNR.
Wanted signal: 33 dBµV EMF (45 µV EMF)
Modulated interferer: At fWanted + 400 kHz and +
4 MHz.
Intermodulation perfor-
mance3,4
–
CW interferer: At fWanted + 800 kHz and + 8 MHz.
Vin = 23 dBμV EMF (14.1 μV EMF).
AM at 400 Hz with m = 0.3.
AM suppression, mono3
40
No A-weighted or any other filtering applied.
RDS
–
–
–
–
–
–
17
7.1
11
13
4.4
7
–
–
–
–
–
–
dBµV EMF
µV EMF
dBµV
RDS deviation = 1.2 kHz.
RDS sensitivity5,6
dBµV EMF
µV EMF
dBµV
RDS deviation = 2 kHz.
Wanted Signal: 33 dBµV EMF (45 µV EMF),
2 kHz RDS deviation.
Interferer: ∆f = 40 kHz, fmod = 1 kHz.
RDS selectivity6
±200 kHz
±300 kHz
±400 kHz
RF Input
–
–
–
–
49
52
52
–
–
–
dB
dB
dB
RF input impedance
Antenna tuning cap
1.5
2.5
–
–
–
kΩ
–
30
pF
Document Number: 002-14796 Rev. *K
Page 80 of 101
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