參數(shù)資料
型號: TDA7400D
廠商: STMICROELECTRONICS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO28
封裝: SOP-28
文件頁數(shù): 2/28頁
文件大?。?/td> 277K
代理商: TDA7400D
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VADJMP
Noise Rectifier adjustment
through Multipath
8)
Signal PEAK in
Testmode
MPNB = 00
8)
(c)
0.3
(c)
V/ms
MPNB = 01
8)
(c)
0.5
(c)
V/ms
MPNB = 10
8)
(c)
0.7
(c)
V/ms
MPNB = 11
8)
(c)
0.9
(c)
V/ms
0) All Thresholds are measured using a pulse with TR =2
s, THIGH = 2s and TF = 10s. The repetition rate must not increase the PEAK voltage.
1) NBT represents the Noiseblanker Byte bits D2, D0 for the noise blanker trigger threshold
2) NAT represents the Noiseblanker Byte bit pair D4, D3 for the noise controlled triggeradjustment
3) OVD represents the Noiseblanker Byte bit pair D7, D6 for the over deviation detector
4) FSC represents the Fieldstrength Byte bit pair D1, D0 for the fieldstrength control
5) BLT represents the Speaker RR Byte bit pair D7, D6 for the blanktime adjustment
6) NRD represents the Configuration-Byte bit pair D1, D0 for the noise rectifier discharge-adjustment
7) PCH represents the Stereodecoder-Byte bit D5 for the noise rectifier charge-current adjustment
8) MPNB represents the HighCut-Byte bit D7 and the Fieldstrength-Byte D7 for the noise rectifier multipath adjustment
65mV
30mV
8 STEPS
NOISE CONTROLLED
TRIG. THRESHOLD
MIN. TRIG. THRESHOLD
260mV(00)
220mV(01)
180mV(10)
140mV(11)
0.9V
VTH
1.5V
VPEAK(V)
D97AU648
Figure 1. Trigger Threshold vs.VPEAK
VPEAK
(VOP)
D97AU649
20
DEVIATION(KHz)
0.9
1.2
2.0
2.8
DETECTOR OFF (11)
32.5
45
75
10
01
00
Figure 2. Deviation Controlled Trigger Adjust-
ment
VOP
VIN
DC
TR
THIGH
TF
Time
D97AU636
TDA7400D
10/28
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