TS472 datasheet(11/25 Pages) STMICROELECTRONICS

部件名	TS472

功能描述	Very low noise microphone preamplifier with 2.0 V bias output and active low standby mode

PDF	25 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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11 / 25 page

TS472

Electrical characteristics

Doc ID 11015 Rev 6

11/25

Figure 20.

Maximum input voltage vs. gain,

THD+N<1%

Figure 21.

Maximum input voltage vs. power

supply voltage, THD+N<1%

1020

3040

100

150

=2.2V

AMB

=25°C

F=1kHz

THD+N<1%

Gain (dB)

=5.5V

=3V

345

100

120

140

Gain=20dB

Gain=0dB

AMB

=25°C, F=1kHz, THD+N<1%

Power Supply Voltage (V)

Gain=30dB

Gain=40dB

2.2

5.5

Figure 22.

THD+N vs. input voltage

Figure 23.

THD+N vs. input voltage

1E-3

0.01

0.1

0.01

0.1

GS=bias

GS grounded

Tamb=25°C, Vcc=3V, F=100Hz,

Cb=1

μF, RL=10kΩ , BW=100Hz-120kHz

Input Voltage (V)

0.3

GS floating

1E-3

0.01

0.1

0.01

0.1

GS grounded

GS floating

GS=bias

Tamb=25°C, Vcc=5V, F=100Hz,

Cb=1

μF, RL=10kΩ , BW=100Hz-120kHz

Input Voltage (V)

0.3

Figure 24.

THD+N vs. input voltage

Figure 25.

THD+N vs. input voltage

1E-3

0.01

0.1

0.01

0.1

GS grounded

GS=bias

Tamb=25°C, Vcc=3V, F=1kHz,

Cb=1

μF, RL=10kΩ , BW=100Hz-120kHz

Input Voltage (V)

0.3

GS floating

1E-3

0.01

0.1

0.01

0.1

GS grounded

GS=bias

GS floating

Tamb=25°C, Vcc=5V, F=1kHz,

Cb=1

μF, RL=10kΩ , BW=100Hz-120kHz

Input Voltage (V)

0.3

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