TDF8541JSSLASHN2 datasheet(38/54 Pages) NXP

38 / 54 page

TDF8541

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Product data sheet

Rev. 3 — 13 December 2011

38 of 54

NXP Semiconductors

TDF8541

I2C-bus controlled 4

 45 W power amplifier

[1]

VSTB depends on the current into pin STB: minimum = (1429   ISTB) + 5.4 V, maximum = (3143  ISTB)+5.6V.

[2]

The times are specified without leakage current. For a leakage current of 5

A on pin SVR, the delta time is specified. If the capacitor

value on pin SVR changes

 30 %, the specified time will also change  30 %. The specified times include an ESR of 15  for the

capacitor on pin SVR.

[3]

Standard I2C-bus specification: maximum LOW-level = 0.3VDD, minimum HIGH-level = 0.7VDD. To comply with 5 V and 3.3 V logic the

maximum LOW-level is defined by VDD = 5 V and the minimum HIGH-level by VDD =3.3 V.

[4]

For optimum channel separation (



cs), supply voltage ripple rejection (SVRR) and common mode rejection ratio (CMRR), a resistor

 must be in series with the ACGND capacitor.

[5]

The plop-noise during amplifier switch-on and switch-off is measured using an ITU-R 2 k filter; see Figure 20.

Vo(mute)(RMS)

RMS mute output voltage

Vi = 1 V RMS;

filter 20 Hz to 22 kHz

-16

V

power bandwidth

1 dB

20 to

20000

-Hz

CL(crit)

critical load capacitance

no oscillation; open load and 2



load; all outputs to GND or across

the load

--nF

Table 20.

Characteristics …continued

Refer to test circuit (see Figure 29) at Tamb =25 C; VP = 14.4 V; unless otherwise specified. Tested at Tamb =25 C;

guaranteed for Tj = 40 C to +150 C; functionality is guaranteed for VP < 10 V unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

ACGND

------

Fig 19. Location of ITU-R 2K filter

DIFFERENTIAL

SINGLE

−

ENDED

5th ORDER

20 kHz

BUTTERWORTH

LOW-PASS

FILTER

ITU-R 2K

FILTER

RECTIFIER

PEAK

DETECTOR

OUTPUT

BUFFER

+ 40 dB GAIN

output

input

001aam706

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