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HT8970 датащи(PDF) 5 Page - Holtek Semiconductor Inc

номер детали HT8970
подробное описание детали  Voice Echo
PDF  9 Pages
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT8970 датащи(HTML) 5 Page - Holtek Semiconductor Inc

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Electrical Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
VCC
Operating Voltage
¾¾
4.5
5.0
5.5
V
ICC
Operating Current
5V
¾¾
15
30
mA
GV
Voltage Gain
5V
RL=47kW¾
-0.9
2.5
dB
VOMAX Maximum Output Voltage
5V
THD=10%
0.9
1.8
¾
Vrms
THD
Total Harmonic Distortion
5V
30kHz L.P.F.
¾
0.7
1.5
%
NO
Output Noise Voltage
5V
DIN Audio
¾-85
-60
dBV
PSRR
Power Supply Rejection
Ratio
5V
DVCC=-20dBV
(0.1Vrms)
f=100Hz
¾-40
-30
dB
HT8970
5
March 14, 2000
Functional Description
The HT8970 is an echo/surround effect genera-
tor with built-in 20Kb SRAM. It ensures low
distortion as well as low noise for processing
audio signal delay. The chip provides two play-
ing modes (echo and surround) and the playing
function block diagrams are shown as follows.
· Surround mode
· Echo mode
LP F 1
A / D
De l a y
D/ A
L P F 2
V IN
V OU T
LP F 1
A / D
De l a y
D/ A
L P F 2
V IN
V OU T



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