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TEA1099H データシート(PDF) 10 Page - NXP Semiconductors |
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TEA1099H データシート(HTML) 10 Page - NXP Semiconductors |
10 / 40 page 1999 Apr 08 10 Philips Semiconductors Product specification Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer TEA1099H Transmit channels (pins MIC+, MIC −, DTMF, TXAUX, HFTX and LN) HANDSET MICROPHONE AMPLIFIER (PINS MIC+, MIC − AND LN) The TEA1099H has symmetrical microphone inputs. The input impedance between MIC+ and MIC − is 70 k Ω(typ.). The voltage gain between pins MIC+/MIC− and LN is set to 44.3 dB. Without limitation from the output, the microphone input stage can accommodate signals up to 18 mV (RMS) at room temperature for 2% of THD. The microphone inputs are biased at one diode voltage. Automatic gain control is provided for line loss compensation. DTMF AMPLIFIER (PINS DTMF, LN AND RECO) The TEA1099H has an asymmetrical DTMF input. The input impedance between DTMF and GND is 20 k Ω (typ.). The voltage gain between pins DTMF and LN is set to 25.35 dB. Without limitation from the output, the input stage can accommodate signals up to 180 mV (RMS) at room temperature for 2% of THD. When the DTMF amplifier is enabled, dialling tones may be sent on the line. These tones can be heard in the earpiece or in the loudspeaker at a low level. This is called the confidence tone. The voltage attenuation between pins DTMF and RECO is typically equal to −16.5 dB. The DC biasing of this input is 0 V. The automatic gain control has no effect on these channels. AUXILIARY TRANSMIT AMPLIFIER (PINS TXAUX AND LN) The TEA1099H has an asymmetrical auxiliary input TXAUX. The input impedance between TXAUX and GND is 20 k Ω (typ.). The voltage gain between pins TXAUX and LN is set to 12.5 dB. Without limitation from the output, the input stage can accommodate signals up to 1.2 V (RMS) at room temperature for 2% of THD. The TXAUX input is biased at two diodes voltage. Automatic gain control is provided for line loss compensation. HANDSFREE TRANSMIT OUTPUT STAGE (PINS HFTX AND LN) The TEA1099H has an asymmetrical HFTX input, which is mainly intended for use in combination with the TXOUT output. The input impedance between HFTX and GND is 20 k Ω (typ.). The voltage gain between pins HFTX and LN is set to 34.7 dB. Without limitation from the output, the input stage can accommodate signals up to 95 mV (RMS) at room temperature for 2% of THD. The HFTX input is biased at two diodes voltage. Automatic gain control is provided for line loss compensation. MICROPHONE MONITORING ON TXOUT (PINS MIC+, MIC − AND TXOUT) The voltage gain between the microphone inputs MIC+/MIC − and the output TXOUT is set to 49.8 dB. This channel gives an image of the signal sent on the line while speaking in the handset microphone. Using external circuitry, this signal can be used for several purposes such as sending dynamic limitation or anti-howling in a listening-in application. The TXOUT output is biased at two diodes voltage. The automatic gain control has no effect on these channels. Receive channels (pins IR, RAUX, RECO, GARX and QR) RX AMPLIFIER (PINS IR AND RECO) The receive amplifier has one input IR which is referred to the line. The input impedance between pins IR and LN is 20 k Ω (typ.) and the DC biasing between these pins is equal to one diode voltage. The gain between pins IR (referred to LN) and RECO is typically equal to 29.7 dB. Without limitation from the output, the input stage can accommodate signals up to 50 mV (RMS) at room temperature for 2% of THD. This receive amplifier has a rail-to-rail output RECO, which is designed for use with high ohmic (real) loads (larger than 5 k Ω). This output is biased at two diodes voltage. Automatic gain control is provided for line loss compensation. |
同様の部品番号 - TEA1099H |
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同様の説明 - TEA1099H |
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