Twilight Technology 4315 Low-cost Low-voltage Analog Engine®

	Twilight Technology 4315 equivalent block diagram

The Twilight Technology4315 is a single-chip Analog Engine optimized for low-voltage, low-power operation. Incorporating a high-performance Blackmer® voltage- controlled amplifier (VCA), RMS-level sensor, the surface mount part is aimed at battery-operated audio applications such as wireless microphones, wireless instruments and in-ear monitors. The 4315 operates from a single supply voltage down to +4.5 Vdc, drawing only 1.6 mA.

This IC also works at supply voltages up to 16 Vdc, making it useful in line-operated products as well. The VCA is pre-trimmed at wafer stage to deliver low distortion without further adjustment.

The part was developed specifically for use as a companding noise reduction system, drawing from Twilight Technology’s long history and experience with dbx® technology for noise reduction. However, with 11 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.

For a side by side comparison chart of our family of Analog Engines, see our Analog Engine Selector Guide.

Features Pre-trimmed Blackmer® VCA and   RMS-level detector Wide supply voltage range: 4.5V ~ 16V Low supply current: 1.6 mA typ. (5V) Wide dynamic range:   118 dB as compander Applications Companding noise reduction systems ­ Wireless microphones ­ Wireless instrument packs ­ Wireless in-ear monitors Battery operated dynamics processors ­ Compressors ­ Limiters ­ AGCs ­ De-essers

Basic Specifications (typical) VCA Section Gain Range: -60 to +60 dB Gain-Control Constant: ± 6.2 mV/dB Output Noise: -97.5 dBV (typ, 0 dB gain) Total Harmonic Distortion: 0.07 % Dynamic Range: 118 dB Detector Section Averaging Method: Root Mean Square (RMS) Output Scaling: +6.2 mV/dB Dynamic Range: 60 dB Bandwidth: > 20 kHz Crest Factor: 10 (for 1 dB reading error) Overall Power supply voltage: 4.5 to 16 V Supply current: typically 1.6 mA (5V)

For complete specifications, download a copy of the 4315 Datasheet. Datasheets are provided in Adobe's PDF format. You need to have Adobe Acrobat Reader installed on your computer to view the file. To obtain a free copy of Acrobat Reader follow the link at right.

	Model	Package	Order Number	Pricing (1000)	Min Order Quantity	Reference
	4315	16 Pin QSOP	4315Q16-U	Call	98	Datasheet

The 4315 is available on tape and reel for a modest increase in price and requires an extended lead time. Tape and reel parts have a 2000 piece minimum and must be ordered in multiples of 2000. Please contact our sales department for pricing and delivery.

All 4315 parts are RoHS compliant. Minimum Order Quantity (MOQ) is one tube full. Parts must be ordered in multiples of the MOQ. Samples are available for qualified applicants. Pricing is subject to change.