TDA7541 Datasheet, PDF (24/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

Electrical specifications and characteristics
TDA7541
3. SCA (subsidiary communications authorization)
a 67 =
-----^V----^o---⁽--^s----ⁱ--^g---ⁿ----^a----^l--,-^@-------¹----^k---^H-----^z---⁾-----
V_o ( s p u r i o u s ,@ 9 k H z )
;ƒ
s
=
((2 × 38kHz) – 67kHz)
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - sub carrier (fS = 67kHz, unmodulated)
4. ACI (adjacent channel interference)
a 114 =
----^V-----^o---⁽--^s----ⁱ--^g---ⁿ----^a----^l--,-^@-------¹----^k---^H-----^z---⁾-----
V_o ( s p u r i o u s ,@ 4 k H z )
;ƒ
s
=
(110kHz – (2 × 38kHz))
a 190 =
----^V-----^o---⁽--^s----ⁱ--^g---ⁿ----^a----^l--,-^@-------¹----^k---^H-----^z---⁾-----
V_o ( s p u r i o u s ,@ 4 k H z )
;ƒ
s
=
(186kHz – (5 × 38kHz))
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal (fS = 110kHz or 186kHz, unmodulated)
5. All thresholds are measured in test mode at the quality output. The thresholds are calculated by V_NBTH - V_PEAK. V_PEAK can
be adjusted by applying a 150 kHz sinewave at MPXIN.
Table 9.
PLL section
(T_amb=25°C, V_CC1=V_CC2=V_CCMIX1=V_CCVCO=V_CCIF=8.5V, f_Xtal = 10.25 MHz,
V_MPX=500mV_rms mono, f=1kHz, de-emphasis τ=50µs, in application circuit, unless
otherwise specified)
Item Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
40. Voltage controlled oscillator (VCO)
40.1 f_VCOmin Min. VCO frequency
40.2 f_VCOmax Max. VCO frequency
40.3 C/N Carrier-to-noise-ratio
41. Crystal oscillator
41.1
41.2
41.3
41.4
41.5
41.6
41.7
41.8
f_xtal
C/N
V₂₉
C_29-32
C_step
C_max
Δf/f
Δf/f
Crystal frequency
Carrier-to-noise-ratio
Oscillator output voltage
Input capacitance
Min. cap. Step
Max. cap.
Deviation versus V_CC
Deviation versus T
42. Charge pump current
42.1 -I₂₀ Source current
42.2 I₂₀ Sink current
42.3 -I₂₀ Source current
42.4 I₂₀ Sink current
f_VCO= 200MHz, Δf=1KHz,
B=1Hz, Q_loaded=60
f_xtal =10.25MHz, Δf=10KHz
XTAL
XTAL
Δ V_CC=1V
-40°C<T<+85°C
V₂₀ = 2.5V
ICP, V₂₀ = 2.5V
160
MHz
260
MHz
80
dBc/√Hz
10.25
110
400
2.5
0.75
23.25
1.5
0.2
50
50
550
500
MHz
dBc/√Hz
mV_rms
pF
pF
pF
ppm/V
ppm/K
μA
μA
μA
μA
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