TS421IQT View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TS421IQT

360mW MONO AMPLIFIER WITH STANDBY MODE

STMicroelectronics 

TS419-TS421

Fig. 98 : Differential Input Amplifier

Configuration

Input capacitance C can be calculated by the

following formula using the -3dB lower frequency

required. (FL is the lower frequency required)

C ≈ 1 (F)

2 π R1 FL

Note : This formula is true only if:

FCB

=

1

942000 × C B

(Hz )

is ten times lower than FL.

The following bill of material is an example of a

differential amplifier with a gain of 2 and a -3dB

lower cuttoff frequency of about 80Hz.

Components :

Designator

Part Type

R1

20k / 1%

R2

20k / 1%

C

100nF

CB=CS

U1

1µF

TS419/21

29/32

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