TS472IQT

TS472IQT is a very low noise microphone preamplifier with 2V bias output and active low standby mode. This differential-input microphone preamplifier optimized for high-performance PDA and notebook audio systems. This device features an adjustable gain from 0 to 40dB with excellent power-supply and common mode rejection ratios. In addition, the TS472 has a very low noise microphone bias generator of 2V. It also includes a complete shutdown function, with active low standby mode. Applications include video and photo cameras with sound input, sound acquisition and voice recognition, video conference systems, notebook computers and PDAs.

• Low noise of 10nV/√Hz typical equivalent input noise at F = 1KHz
• Fully-differential input/output, 2.2 to 5.5V single supply operation
• Low power consumption at 20dB: 1.8mA
• Fast start up time at 0dB: 5ms typ, low distortion of 0.1% typ
• 40KHz bandwidth regardless of the gain
• Active low standby mode function (1μA max)
• Low noise 2.0V microphone bias output
• ESD protection (2KV)
• Typical differential gain (GS connected to 4.7Kohm or bias) is 20dB
• QFN 24 package, -40°C to +85°C temperature range