TDA7421N Datasheet, PDF (14/38 Pages) STMicroelectronics – AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS

TDA7421N
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
IF_AMST
AM IF2 Output Level at pin 28
VI_F2AMPIN = 72dBmV;
AMSTEREO set to 1
106
dBµV
IF_AMSTcurr Current Capability of pin 28
AMSTEREO set to 1
150
µA
AM Field Strength Meter and Field Strength Station Detector
Ref: AM Test Circuit; f_IN = 10.7MHz, measure input at V_MIX2AMIN, outputs at V_AMSMETER and at V_AMSD (switches in
position 2).
AMSM1 AM Smeter 1 at V_AMSMETER
V_MIX2AMIN = 40dBµV
1.4
V
AMSM2 AM Smeter 2 at V_AMSMETER
V_MIX2AMIN = 60dBµV
3.4
V
AMSM3 AM Smeter 3 at V_AMSMETER
V_MIX2AMIN = 80dBµV
4.8
V
AMSD_MIN Station Detector Minimum
V_MIX2AMIN at which V_AMSD = 2.5V;
27
dBµV
Threshold
ASS3-0 set to 0000, SEEK set to 1
AMSD_MAX Station Detector Maximum
Threshold
V_MIX2AMIN at which V_AMSD = 2.5V;
ASS3-0 set to 1111, SEEK set to 1
dBµV
IF Counter Output
Ref: AM & FM Test Circuit, measure at pin 28
IFC_FM FM IFC Sensitivity
V_FMLIMIN at which Vpin 28 =
34
dBµV
2.5V, SEEK set to 1, EW2-0 set
to 101, IFS2-0 set to 010
IFC_AM AM IFC Sensitivity
V_IF2AMPIN at which Vpin 28 =
29
dBµV
2.5V, SEEK set to 1, EW2-0 set
to 011, IF2-0 set to 100, AMFM
STBY1-0 set to 10
IFC_current IFC Current Capability
150
µA
SD output Impedance
Measure output at V_FMSD
SD_IMP,ON SD output impedance
SDDIS set to 0
700
Ω
SD_IMP,TS SD output impedance (Tri-State) SDDIS set to 1
7
MΩ
Loop Filter Input/Output
(LP_IN1, LP_IN2, LP_IN3, LP_OUT)
-I_IN
Input Leakage Current
V_IN = GND; PD_out = Tristate
-2
0
2
µA
I_IN
Input Leakage Current
V_IN = V_DD; PD_out = Tristate
-2
0
2
µA
V_OL
Output Voltage Low
I_IN = -0.2mA; V_CC = 8.5V
0.5
V
V_OH
Output Voltage High
I_OUT = 0.2mA; V_CC = 8.5V
8
V
I_OUT
Output Current Sink
V_PLL = 8.5V;
10
mA
I_OUT
Output Current Source
V_out = 0.5 to 8V
10
mA
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