HT8970 データシートの表示（PDF） - Holtek Semiconductor

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HT8970

Voice Echo

Holtek Semiconductor 

Electrical Characteristics

Symbol

Parameter

VCC

ICC

GV

VOMAX

THD

NO

Operating Voltage

Operating Current

Voltage Gain

Maximum Output Voltage

Total Harmonic Distortion

Output Noise Voltage

PSRR

Power Supply Rejection

Ratio

Test Conditions

VDD

¾

Conditions

¾

5V

¾

5V RL=47kW

5V THD=10%

5V 30kHz L.P.F.

5V DIN Audio

DVCC=-20dBV

5V (0.1Vrms)

f=100Hz

HT8970

Ta=25°C

Min. Typ. Max. Unit

4.5 5.0 5.5 V

¾ 15 30 mA

¾ -0.9 2.5 dB

0.9 1.8 ¾ Vrms

¾ 0.7 1.5 %

¾ -85 -60 dBV

¾ -40 -30 dB

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

V IN L P F 1 A /D D e la y D /A L P F 2 V O U T

· Echo mode

V OUT

V IN

L P F 1 A /D D e la y D /A L P F 2

5

March 14, 2000

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