TDA8575 datasheet(8/16 Pages) PHILIPS

No de pièce	TDA8575

Description	Ground noise isolation amplifier

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Fabricant	PHILIPS [NXP Semiconductors]

Site Internet	http://www.nxp.com

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8 / 16 page

1996 Jul 29

8

Philips Semiconductors

Preliminary speciﬁcation

Ground noise isolation ampliﬁer

TDA8575

AC CHARACTERISTICS

VCC = 8.5 V; f = 1 kHz; Rs = 0 kΩ; RL = 10 kΩ; Tamb = 25 °C; in accordance with application circuit (see Fig.9).

Notes

1. The channel separation is dependent on the capacitor C2 connected to the IN- input. The channel separation for low

frequencies (<1 kHz) can be increased by using a larger capacitance for C2.

2. The frequency response is externally fixed by the input and output coupling capacitors.

3. The noise output voltage is measured in a bandwidth of 20 Hz up to 20 kHz, unweighted.

4. The common mode rejection ratio is measured at the output with a voltage source Vcm(rms) = 1 V and both

Vi(L) and Vi(R) short-circuited according to Fig.9. The common mode rejection is dependent on the capacitor C2

connected to the IN- input. The common mode rejection for low frequencies (<1 kHz) can be increased by using a

larger capacitance for C2.

5. Supply voltage ripple rejection is measured at the output using a ripple amplitude of 2 V (p-p).

The source resistance Rs = 2 kΩ.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Gv

voltage gain

−0.5

0

+0.5

dB

α

cs

channel separation

Rs = 5 kΩ; note 1

70

80

−

dB

∆Gv

channel unbalance

−

0.5

dB

fro(L)

low frequency roll-off

−1 dB; note 2

−

20

Hz

fro(H)

high frequency roll-off

−1 dB

20

−

kHz

Zi

input impedance

80

108

123

k

Ω

Zo

output impedance

−

10

Ω

Vi(rms)(max) maximum input voltage (RMS value)

THD = 1%

−

1.7

−

V

Vno

noise output voltage

unweighted; note 3

−

3.7

5

µV

THD

total harmonic distortion

Vi(rms) = 1 V

−

0.005

0.01

%

Vi(rms) = 1 V;

f = 20 Hz to 20 kHz

−

0.01

−

%

THDmax

total harmonic distortion at maximum

output current

Vi(rms) = 1 V; RL = 150 Ω −

−

1

%

Vi(cm)(rms)

common-mode input voltage (RMS value)

−

1

V

CMRR

common-mode rejection ratio

Rs = 5 kΩ

66

80

−

dB

Rs = 0 Ω; note 4

f = 100 Hz to 20 kHz

−

80

−

dB

SVRR

supply voltage ripple rejection

Rs = 2 kΩ; note 5

55

−

dB

Rs = 2 kΩ; note 5

f = 20 Hz to 20 kHz

−

60

−

dB

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