TDA7540N Datasheet, PDF (16/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

Electrical specifications
TDA7540N
Table 6.
Symbol
FM section electrical characteristics (continued)
(T_amb = 25°C, V_CC1 = V_CC2 = V_CC3 = V_CCST= V_CCVCO = V_CCMIX1 = V_CCMIX2 = V_CCIF1 = 8.5V,
f_RF = 98MHz, dev= 40kHz, f_MOD = 1kHz, f_Xtal = 10.25MHz, in application circuit, unless
otherwise specified).
Parameter
Test conditions
Min. Typ. Max. Unit
Adjacent channel ISS filter threshold
V_NTH
V_NTH
V_WTH
V_WTH
Internal low threshold
Internal high threshold
Internal low threshold
Internal high threshold
ACNTH
ACNTH
ACWTH
ACWTH
Multipath threshold
0
V
0.24
0.3
0.36
V
0.2
0.25
0.3
V
0.76 0.95 1.14
V
V_THMP
V_THMP
Internal low threshold
Internal high threshold
MPTH
MPTH
ISS filter time constant
0.40 0.50 0.60
V
1.0
1.25
1.5
V
I₂₇,I₂₈
I₂₇,I₂₈
I₂₇,I₂₈
I₂₇,I₂₈
I₂₇,I₂₈
I₂₇,I₂₈
V₂₇,V₂₈
V₂₇,V₂₈
Charge current low mid
Charge current high mid
Charge current low narrow
Charge current high narrow
Discharge current low
Discharge current high
Low voltage
High voltage
TISS, ISSCTL = 1
TISS, ISSCTL = 1
TISS, ISSCTL = 1
TISS, ISSCTL = 1
TISS, ISSCTL = 0
TISS, ISSCTL = 0
ISSCTL = 0
ISSCTL = 1
ISS filter switch threshold
-96
-74
-54
μA
-60
μA
-165 -124 -87
μA
-110
μA
-0.4
1
2.0
μA
10
15
20
μA
0.1
0.2
V
4.6
4.9
V
V₂₇,V₂₈
V₂₇,V₂₈
V₂₇,V₂₈
V₂₇,V₂₈
I₃
I₃
I₃
I₃
DEV_WTH
DEV_WTH
RATIO_min
RATIO_max
Threshold ISS on
Threshold ISS off
Threshold ISS narrow on
Threshold ISS narrow off
Charge current low
Charge current high
Discharge current low
Discharge current high
Internal low threshold
Internal high threshold
Referred to threshold
Referred to threshold
ISSCTL = 0
ISSCTL = 0
ISSCTL = 0
ISSCTL = 0
TDEV
TDEV
TDEV
TDEV
DWTH
DWTH
DTH
DTH
3
V
1
V
4
V
2
V
-20
-32
-40
μA
-30
-39
-48
μA
0.5
1
1.5
μA
5.5
8
10.5
μA
30
kHz
75
kHz
1
1.5
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