TEA1093T View Datasheet(PDF) - Philips Electronics

Part Name

Description

View to exact match

TEA1093T

Hands-free IC

Philips Electronics 

Philips Semiconductors

Hands-free IC

10

handbook, halfpage

VBB

(V)

8

MGD220

6

RVA(VA-GND)

4

3.6 V without RVA

2

1

10

RVA(VA-VBB)

102 RVA (kΩ) 103

Fig.5 VBB as a function of RVA.

Product specification

TEA1093

Microphone channel: pin MIC, GAT, MOUT, MICGND

and MUTET

The TEA1093 has an asymmetrical microphone input MIC

with an input resistance of 20 kΩ. The gain of the input

stage varies according to the mode of the TEA1093. In the

transmit mode, the gain is at its maximum; in the receive

mode, it is at its minimum and in the idle mode, it is halfway

between maximum and minimum. Switch-over from one

mode to the other is smooth and click-free. The output

capability at pin MOUT is 20 µA (RMS).

In the transmit mode, the overall gain of the microphone

amplifier (from pin MIC to MOUT) can be adjusted from

5 dB up to 25 dB to suit specific application requirements.

The gain is proportional to the value of RGAT and equals

15 dB typical with RGAT = 30.1 kΩ.

A capacitor must be connected in parallel with RGAT to

ensure stability of the microphone amplifier. Together with

RGAT, it also provides a first-order low-pass filter.

By applying a HIGH level on pin MUTET, the microphone

amplifier is muted and the TEA1093 is automatically

forced into the receive mode.

handbook, full pagewidth

VBB

19 MUTET

CMIC 22 MIC

RMIC

VI

to

from

envelope voice

detector switch

to

logic

GAT 21 RGAT

IV

MOUT 20

18

MICGND

MGD221

Fig.6 Microphone channel.

to TEA106X

1996 Feb 09

8

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