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TEA1099H

Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer

Philips Electronics 

Philips Semiconductors

Speech and handsfree IC with auxiliary

inputs/outputs and analog multiplexer

Product specification

TEA1099H

8

handbook, full pagewidth

voltages

(V)

6

4

2

FCA049

LN

SLPE

VBB

VDD

MICS

0

0

0.01

0.02

0.03

0.04

0.05

0.06 Iline (A) 0.07

Fig.4 Main DC voltages.

EXTERNAL SUPPLY (PINS ESI AND VBB)

The TEA1099H can be supplied by the line as well as by

external power sources (voltage or current sources) that

must be connected to pin ESI.

The IC will choose which supply to use according to the

voltage it can provide. A voltage supply on ESI is efficient

only if its value is greater than the working voltage of the

internal VBB voltage stabilizer. Otherwise the IC continues

to be line powered. The current consumed on this source

is at least equal to the internal consumption. It increases

with the voltage difference between the value forced on

ESI and the working voltage of the internal stabilizer.

The excess current compared to the internal consumption

becomes then available for other purposes such as

supplying a loudspeaker amplifier. The voltage source

should not exceed 6 V. If the value of the external voltage

source can be lower than the working voltage of the

internal stabilizer, an external diode is required to avoid

reverse current flowing into the external power supply.

In case of current source, the voltage on VBB and ESI

depends on the current available. It is internally limited to

6.6 V. The current source should not exceed 140 mA.

VDD SUPPLY FOR MICROCONTROLLER (PIN VDD)

The voltage on VDD supply point follows the voltage on VBB

with a difference typically equal to 250 mV and is internally

limited to 3.35 V. This voltage is temperature

compensated. This supply point can provide a current up

to 3 mA typically. Its internal consumption stays low (a few

10 nA) as long as VDD does not exceed 1.5 V (see Fig.5).

An external voltage can be connected on VDD with limited

extra consumption on VDD (typically 100 µA). This voltage

source should not be lower than 3.5 V or higher than 6 V.

VBB and VDD can supply external circuits in the limit of

currents provided either from the line or from ESI, taking

into account the internal current consumption.

1999 Apr 08

8

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