參數(shù)資料
型號： TDA7528
廠商： STMICROELECTRONICS
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件頁數(shù)： 8/65頁
文件大?。?/td> 610K
代理商： TDA7528
Electrical characteristics
TDA7528
Doc ID 13141 Rev 6
3.4
FM - Section
3.4.1
IMR and active balun
The IMR mixer has two software-selectable FM inputs (referred to as mode 1 and mode 2).
These inputs are implemented with different gains, noise figures, IIP3, maximum input
signal.
There are two single ended outputs of the IMR mixer. One is dedicated to FM (Balunout1)
and the other to AM (Balunout2). It is not recommended to use both outputs in parallel.
Table 7.
IMR and active balun electrical characteristics
(All parameter are referred to Balunout1, unless otherwise specified)
Symbol
Parameter
Test condition
Min.
Typ
Max
Units
Gmix1
Gmix2
Gain vs. Balunout1
Mode 1 (unloaded gain)
Mode 2 (unloaded gain)
20
13
22
15
24
17
dB
Gmix1
Gmix2
Gain vs. Balunout2
Mode 1 (unloaded gain)
Mode 2 (unloaded gain)
16
9
18
11
20
13
dB
-
Absolute gain error
@ 100 MHz @ 25°C
-
± 1.0
dB
-
Gain error vs. frequency
Freq. range @ 25°C
47,0 to 74,0 MHz
76,0 to 90,0 MHz
87,5 to 108,0 MHz
30,0 to 170,0 MHz
--
± 0,5
± 2,0
dB
-
Gain error vs. temperature
-40 °C to 105 °C
-
± 2,0
dB
-
Gain attenuation range
Controlled by IF-AGC
17.5
20
-
dB
-
Input impedance
Mode 1
Mode 2
5
--
k
Ω
-
Input resistance
Mode 1
Mode 2
30
9.5
50
12.5
19.5
k
Ω
-
Output impedance
Active balun
15
20
30
Ω
-
External load
Full current: reg14[5] = 0
Red. current: reg14[5] = 1
320
600
--
Ω
Vout_max
Max. output voltage
1dB below 1dB compression
point
121
123
-
dB
μV
Vin_max
Max. input voltage
Mode 1
Mode 2
1dB below 1dB compression
point
100
108
--
dB
μV
Vnoise
(1)
Input noise voltage – mode1
Input noise voltage – mode2
Rsource=1.5 k
Ω, noiseless
in 65 MHz-170 MHz range
Rsource = 800
Ω, noiseless
in 65 MHz-170 MHz range
-
3.1
5
3.7
6
nV/
√ Hz
dnoise
vnoise*atten*dnoise
AGC noise behavior
@ 6 dB attenuation
-6
-
dB
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