TA7280 データシートの表示（PDF） - Toshiba
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TA7280 Datasheet PDF : 14 Pages
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Block Diagram
DUAL
TA7280,81P
Application Information(this explanatory terminal number is for TA7280P)
1. Voltage gain adjustment
(1) Dual amplifier
The voltage gain GV is determined
by R1, R2 and Rf in (Fig. 1).
GV
=
20log
Rf
+ R1 + R2
Rf + R1
(dB)
In case of Rf = 0
The voltage gain is set as follows:
GV = 52dB (typ.)
(2) BTL amplifier
The recommended BTL connection
amplifier shown in (Fig. 2) .
AMP. 1 is noninverting amplifier and
AMP. 2 is invert one.
The output voltage is divided by
resistors R3 and R4.
The divided voltage is applied to
inverting input of amp. 2. R3 and R4
are determined in the following equation.
R3 + R4
R3
=
20log
Rf
+ R1 + R2
Rf + R1
(dB)
GV in Dual mode
2
2002-10-30
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