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THAT 4320Q28, analogue Engine. Dynamics Processor, QSOP28

€ 10,49 *Prices include VAT € 8,67 excluding VAT €
Manufacturer:  THAT
Article code:  THAT4320Q28
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Pre-trimmed,  low voltage Analog Engine® Dynamics Processor



Pre-trimmed Blackmer® VCA & RMS-level detector

Wide supply voltage range: 4,5V ~ 16V

Low supply current: 3,7 mA typ. (5V)

Four Opamps

One low-noise opamp (<5nV/rt-Hz)

On board PTAT reference

Wide dynamic range: 120 dB as compander


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The THAT4320 is a single-chip Analog Engine® optimized for low-voltage, low-power operation.

Incorporating a high-performance voltage- controlled amplifier (VCA), RMS-level sensor, and four opamps, the surface mount part is aimed at battery-operated audio applications such as wireless microphones, wireless instruments and in-ear monitors.

The 4320 operates from a single supply voltage down to +4.5Vdc, drawing only 3.7mA. This IC also works at supply voltages up to 16Vdc, making it useful in line-operated products as well.

The VCA is pre-trimmed at wafer stage to deliver low distortion without further adjustment. And, one opamp is quiet enough to be used as a microphone preamp.

The part was developed specifically for use as a companding noise reduction system, drawing from THAT’s long history and experience with dbx® technology for noise reduction. However, with 22 active pins, the part is extremely flexible and can be configured for a wide range of applications including single and multi-band companders, compressors, limiters, AGCs, de-essers, etc.

What really sets the 4320 apart is the transparent sound of its Blackmer® VCA coupled with its accurate true-RMS level detector.

The IC is useful in battery powered mixers, compressor/limiters, ENG devices and other portable audio products.

The part is highly integrated and requires minimal external support circuitry: it even contains an on-board PTAT (proportional to absolute temperature) voltage reference to generate thermally compensated control voltages for tresholds and gain settings.

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