參數(shù)資料
型號: TDA7540N
廠商: STMICROELECTRONICS
元件分類: 調(diào)諧器
英文描述: 2-BAND, AUDIO TUNER, PQFP80
封裝: 14 X 14 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-80
文件頁數(shù): 11/76頁
文件大小: 1225K
代理商: TDA7540N
TDA7540N
Electrical specifications
3.3.4
Stereodecoder
A
Max. gain
Mixer2 tank output
34
dB
ΔA
Gain control range
20
dB
Cmin
Min. cap step
IF2T
1.6
pF
Cmax
Max. cap
IF2T
24
pF
C62-63
IF2T
2
pF
IF noise blanking
tbl
Min. blanking time
8
μs
tbl
Max. blanking time
17
μs
Vth
Min internal threshold
10
12.5
15
mV
Vth
Max. internal threshold
150
187.5
225
mV
Vthstep
Threshold step
10
12.5
15
mV
Vdesth
Min. desensitivity threshold
2.9
3.2
3.5
V
Vdesth
Max. desensitivity threshold
3.6
4
4.4
V
Table 7.
AM section electrical characteristics (continued)
(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,
fRF = 98MHz, m= 30%, fMOD = 400kHz, fXtal = 10.25MHz, in application circuit, unless
otherwise specified).
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Table 8.
Stereodecoder electrical characteristics
(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,
VMPX = 500mVrms mono, f = 1kHz, deemphasis = 50s, fXtal = 10.25MHz, in application
circuit, unless otherwise specified).
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Stereodecoder
Vin
MPX input level
STD Gain = 2.5 dB
0.5
0.93
Vrms
Rin
Input resistance
70
100
130
k
Ω
Gmin
Min. Stereodecoder gain
-0.5
0
0.5
dB
Gmax
Max. Stereodecoder gain
3.15
3.75
4.35
dB
Gstep
Stereodecoder gain step
resolution
1
1.25
1.5
dB
SVRR
Supply voltage ripple rejection Vripple = 100mV, f = 1kHz
54
60
dB
a
Max. channel separation
VMPX = 500mVrms stereo
only L/R
50
dB
THD
Total harmonic distortion
0.02
0.3
%
(S+N)/N
Signal plus Noise to Noise
ratio
A-weighted, 19kHz notch
85
dB
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