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TEA1093 Fiches technique(PDF) 8 Page - NXP Semiconductors |
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TEA1093 Fiches technique(HTML) 8 Page - NXP Semiconductors |
8 / 28 page 1996 Feb 09 8 Philips Semiconductors Product specification Hands-free IC TEA1093 Fig.5 VBB as a function of RVA. handbook, halfpage 10 2 6 8 MGD220 4 VBB (V) RVA (kΩ) 110 102 103 3.6 V without RVA RVA(VA-GND) RVA(VA-VBB) Microphone channel: pin MIC, GAT, MOUT, MICGND and MUTET The TEA1093 has an asymmetrical microphone input MIC with an input resistance of 20 k Ω. 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. Fig.6 Microphone channel. handbook, full pagewidth MGD221 V I I V CMIC VBB RMIC MUTET MIC from voice switch to envelope detector MICGND MOUT GAT 21 20 19 22 18 to TEA106X RGAT to logic |
Numéro de pièce similaire - TEA1093 |
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Description similaire - TEA1093 |
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