tda7421n STMicroelectronics, tda7421n Datasheet - Page 13

• Manufacturer Part Number: tda7421n
• Description: Am/fm Tuner For Car Radio And Hi-fi Applications
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (Continued)
AM Mixer 2
Ref: AM Test Circuit; measure input at V
measurements).
AM IF2 Amplifier
Ref: AM Test Circuit; f
G
G
AGC
AGC
R
AGC
AGC
AGC
AGC
CP1
AGC
IF2AMPMAX
Symbol
R
IF2AMPMIN
IP3
IN,IF2AMP
CAdj2
G
IN,MIX2
MIX2
AMPSP
MIX2
MIXSP
AMPIS
AMPR
MIXIS
MIX2
MIXR
TCR
Input Resistance
Maximum conversion Gain
3rd Order Intermodulation
Distortion Intercept Point
1dB Compression Point
Value of the minimum adjusting
capacitance step
AGC2 Starting Point on Mixer 2
AGC2 intervention slope on
Mixer 2
AGC2 Range on Mixer 2
Input Resistance
Minimum Gain
Maximum Gain
AGC2 Starting Point on IF2 Amp Value of V
AGC2 Range on IF2 Amp
AGC2 intervention slope on IF2
Amp
AGC2 Time Constant Ratio
IN
= 450KHz, measure input at V
Parameter
MIX2AMIN
f
f
f
f
T2A3-0 set to 0001
f
V
1dB compressed;
IF2A1-0 set to 10
f
IF2A1-0 set to 10
f
V
which V
increasing linearly with a
1dB/dB slope; IF2A1-0 set to 10
V
IF2A1-0 set to 00
V
IF2A1-0 set to 11
V
IF2A1-0 set to 01
f
V
which V
increasing linearly with a
1dB/dB slope; IF2A1-0 set to 01
f
IF2A1-0 set to 1
Ratio of AGC2 "reception" Time
Constant and "seek" Time
Constant
IN
d
u2
IN
IN
IN
IN
IN
IN
, output at V
V
V
MIX2AMIN
MIX2AMIN
IF2AMPIN
IF2AMPIN
IF2AMPOUT
IF2AMPIN
= 10.7MHz; f
MIX2AMIN
IF2AMPIN
= 10.7MHz
= 10.7MHz
= 10.7MHz; Value of
= 10.7MHz: V
= 10.7MHz; Range of
= 10.7MHzRange of
= 10.7MHz; V
= 10.9MHz
IF2AMPIN
MIX2OUT
IF2AMPOUT
Test Condition
IF2AMPIN
= 10dB V;
= 10dB V;
above AGC
for which V
above AGC
= 1dB;
= 1dB;
is 1dB compressed,
MIX2OUT
, output at V
u1
is not
MIX2OUT
= 10.8MHz;
IF2AMPOUT
is not
for which
(switches must be in position 2 for AGC
MIX2OUT
AMPSP
MIXSP
for
IF2AMPOUT
for
for
for
is
Min.
50
(switches must be in position 1).
150/5
Typ.
1.57
117
107
0.1
0.1
25
48
50
59
60
33
5
2
Max.
TDA7421N
dB/dB
dB/dB
dB V
dB V
dB V
dB V
Unit
K
K
s/s
dB
pF
dB
dB
dB
dB
13/38