TDA7705 Electrical specifications
Doc ID 15938 Rev 9 23/42
3.5 Overall system performance
All measurements obtained with application of Figure 16 (FM tuned application / SPI
control) unless otherwise specified.
3.5.1 FM overall system performance
Antenna level equivalence: 0 dBµV = 1 µV
rms
(Antenna terminal voltage with 50 source).
Figure 10. FM input set-up
Input level referred to signal generator loaded with 50 (V
rf
, node 'A'); no antenna dummy;
AM input not connected. F
rf
= 98.1 MHz, V
rf
= 60 dBµV, mono modulation, f
dev
= 40 kHz,
f
audio
= 1 kHz. De-emphasis = 50 µs. Unless otherwise specified
Table 17. FM overall system performance
Parameter Test condition Min Typ Max Units
Tuning range FM Eu
(can be modified by the user)
(automatic FE alignment
available)
87.5 - 108 MHz
Tuning step FM Eu (can be modified by the user) - 100 - kHz
Tuning range FM US
(can be modified by the user)
(automatic FE alignment
available)
87.5 - 107.9 MHz
Tuning step FM US (can be modified by the user) - 200 - kHz
Tuning range FM Jp
(can be modified by the user)
(automatic FE alignment
available)
76 - 90 MHz
Tuning step FM Jp (can be modified by the user) - 100 - kHz
Tuning range FM EEu
(can be modified by the user)
(automatic FE alignment not
available)
65 - 74 MHz
Tuning step FM EEu (can be modified by the user) - 100 - kHz
Sensitivity S/N =26dB - -7 -4 dBµV
S/N
@ 10 dBµV, no highcut, DISS
BW = #3
-55-dB
Ultimate S/N
@ 60 dBµV, mono 72 75 - dB
@ 60 dBµV,
Deviation = 75 kHz, mono
78 81 - dB
@ 60 dBµV, stereo 70 73 - dB
V
rf
+ 6dB
PCB
UNDER
TEST
50Ω
V
rf
+ 6dB
V
rf
50Ω
50Ω
A
