5171N32-U

5171N32-U is a high-performance digital preamplifier controller IC. It is a digital gain controller for low noise, analogue, differential, and current-feedback audio preamplifiers such as the THAT 1580. When used in conjunction with an appropriate analogue gain block, this device can set gain to 5.6dB, or any gain from 13.6dB to 68.6dB in 1dB steps, while preserving low noise and distortion. It operates from ±5V to ±17V supplies, supporting input signal levels as high as +22dBu (at 5.6dB gain, and ±17V supplies) in combination with 1580 (without an external input pad). It is used in applications such as digitally controlled microphone preamplifiers, digitally controlled instrumentation amplifiers, digitally controlled differential amplifiers, audio mixing consoles, PC audio breakout boxes, audio distribution systems, digital audio snakes, and portable audio recorders.

• Integrated differential servo minimizes output offset
• Zero-crossing detector minimizes switching noise
• Flexible, addressable SPI interface, four general-purpose digital outputs
• Analog supply voltage range from 4.75V to 17V, digital supply voltage range from 3V to 3.6V
• Analog supply current is 8.3mA typical, digital supply current is 2µA typical
• THD+N is 0.0003% typical, 10MHz maximum frequency
• Gain range from 5.6dB to 68.6dB, gain step Size is 1dB typical
• Gain error is ±0.15dB typical, input offset voltage is +1.6mV maximum
• Power supply rejection ratio is 115dB typical at (VCC = -VEE; ±5V to ±15V)
• Operating temperature range from -40°C to +85°C, 32-pin QFN package