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TEA1069AH 数据表(PDF) 11 Page - NXP Semiconductors |
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TEA1069AH 数据表(HTML) 11 Page - NXP Semiconductors |
11 / 44 page 1998 Jan 08 11 Philips Semiconductors Product specification Versatile speech/dialler/ringer with music-on-hold TEA1069; TEA1069A Fig.8 Alternative receiver arrangements. Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH. (1) Resistor may be connected to prevent distortion (inductive load). (2) Resistor is required to increase the phase margin (capacitive load). a. Dynamic earpiece. b. Magnetic earpiece. c. Piezoelectric earpiece. k, full pagewidth (1) (2) QR 1 (39) 23 (18) 1 (39) 23 (18) 1 (39) 23 (18) QR QR MBH199 VEE VEE VEE DUAL TONE MULTI-FREQUENCY INPUT DTMF When the DTMF input is enabled (MUTE is LOW) dialling tones may be sent on to the line. The voltage gain from DTMF to LN is typically 25.5 dB (when R7 = 68 k Ω) and varies with R7 in the same way as the microphone gain. The tones can be heard in the earpiece at a low level (confidence tone). AUTOMATIC GAIN CONTROL INPUT AGC Automatic line loss compensation is achieved by connecting a resistor (R6) between AGC and VEE. The automatic gain control varies the gain of the microphone amplifier and the receiving amplifier in accordance with the DC line current. The control range is 5.8 dB which corresponds to a line length of 5 km for a 0.5 mm diameter twisted-pair copper cable with a DC resistance of 176 Ω/km and average attenuation of 1.2 dB/km. Resistor R6 should be chosen in accordance with the exchange supply voltage and its feeding bridge resistance (see Fig.9 and Table 1). The ratio of start and stop currents of the AGC curve is independent of the value of R6. If no automatic line-loss compensation is required the AGC pin may be left open-circuit. The amplifiers, in this condition, will give their maximum specified gain. |
类似零件编号 - TEA1069AH |
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类似说明 - TEA1069AH |
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