TS4890

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REMARKS

1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 100µF.

1. External resistors are not needed for having better stability when supply @ Vcc down to 3V. The

quiescent current still remains the same.

2. The standby response time is about 1µs.

Components

Functional Description

Rin

Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also

forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin))

Cin

Input coupling capacitor which blocks the DC voltage at the amplifier input terminal

Rfeed

Feed back resistor which sets the closed loop gain in conjunction with Rin

Cs

Supply Bypass capacitor which provides power supply filtering

Cb

Bypass pin capacitor which provides half supply filtering

Cfeed

Low pass filter capacitor allowing to cut the high frequency

(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))

Rstb

Pull-down resistor which fixes the right supply level on the standby pin

Gv

Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)