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TEA1098A 数据表(PDF) 2 Page - NXP Semiconductors |
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TEA1098A 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 40 page 2000 Mar 21 2 Philips Semiconductors Preliminary specification Speech and handsfree IC TEA1098A FEATURES Line interface • Low DC line voltage • Voltage regulator with adjustable DC voltage • Symmetrical high impedance inputs (70 kΩ) for dynamic, magnetic or electret microphones • DTMF input with confidence tone on earphone and/or loudspeaker • Earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain) • Digital volume control on earphone amplifier (4 steps) • Automatic Gain Control (AGC) for true line loss compensation • Microphone mute • Key tone mode. Supplies • Provides a strong 3.35 V regulated supply for microcontroller or dialler • Provides filtered power supply, optimized according to line current • Filtered 2.0 V power supply output for electret microphone • PD logic input for power-down. Handsfree • Asymmetrical high input impedance for electret microphone • Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain • Dynamic limiter on loudspeaker amplifier to prevent distortion • Digital volume control on loudspeaker amplifier (8 steps) • Duplex controller consisting of: – signal and noise envelope monitors for both channels (with adjustable sensitivities and timing) – decision logic (with adjustable switch-over and Idle mode timing) – voice switch control (with adjustable switching range and constant sum of gain during switching). APPLICATIONS • Line powered telephone sets. GENERAL DESCRIPTION The TEA1098A is an analog bipolar circuit dedicated for telephony applications. It includes a line interface, handset (HS) microphone and earpiece amplifiers, handsfree (HF) microphone and loudspeaker amplifiers and a duplex controller with signal and noise monitors on both channels. Digital volume control is available both on earphone and loudspeaker amplifiers. This IC provides a 3.35 V strong supply for a microcontroller and a 2.0 V filtered voltage supply for an electret microphone. ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TEA1098ATV VSO40 plastic very small outline package; 40 leads SOT158-1 TEA1098AH QFP44 plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 × 10× 1.75 mm SOT307-2 |
类似零件编号 - TEA1098A |
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类似说明 - TEA1098A |
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