TS472 datasheet(9/25 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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9 / 25 page

TS472

Electrical characteristics

Doc ID 11015 Rev 6

9/25

Figure 8.

Bias output voltage vs. bias output

current

Figure 9.

Bias output voltage vs. power

supply voltage

1.4

1.6

1.8

2.0

2.2

Tamb=85°C

Tamb=25°C

Bias Output Current (mA)

Tamb=-40°C

Vcc=2.5-6V

1.4

1.6

1.8

2.0

2.2

Ibias=4mA

Ibias=2mA

Tamb=25°C

Ibias=0mA

Power Supply Voltage (V)

2.2

5.5

Figure 10.

Bias PSRR vs. frequency

Figure 11.

Bias PSRR vs. frequency

100

1000

10000

-100

-80

-60

-40

-20

Vripple=200mVpp

Vcc=3V

Cb=1

μF

Tamb =25

°C

Frequency (Hz)

20k

Bias floating or 1k

Ω to GND

100

1000

10000

-100

-80

-60

-40

-20

Bias = 1k

Ω to GND

Vripple=200mVpp

Vcc=5V

Cb=1

μF

Tamb=25

°C

Frequency (Hz)

20k

Bias floating

Figure 12.

Differential output PSRR vs.

frequency

Figure 13.

Differential output PSRR vs.

frequency

100

1000

10000

-80

-70

-60

-50

-40

-30

-20

-10

GS=bias

GS grounded

Vripple=200mVpp

Inputs grounded

Vcc=3V

Cb=1

μF

Cin=100nF

Tamb=25

°C

GS floating

Frequency (Hz)

20k

100

1000

10000

-80

-70

-60

-50

-40

-30

-20

-10

GS=bias

GS grounded

Vripple=200mVpp

Inputs grounded

Vcc=5V

Cb=1

μF

Cin=100nF

Tamb=25

°C

GS floating

Frequency (Hz)

20k

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