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TEA1098A
Datasheet
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.
Features
Line interface
- Low DC line voltage
- Voltage regulator with adjustable DC voltage
- Symmetrical high impedance inputs (70 kOhm) 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).
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| TEA1098ATV/C2 | 9352 760 64118 | Volume production | SOT158-1
(VSO40) | Reel Pack, SMD, 13" | Standard Marking | TEA1098ATV/C2
| week 2, 2006 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| TEA1098ATV/C2 | 9352 760 64118 | not available |
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