TS4972 datasheet(17/30 Pages) STMICROELECTRONICS

17 / 30 page

Electrical Characteristics

TS4972

17/30

Figure 67: THD + N vs Frequency

Figure 68: THD + N vs Frequency

Figure 69: Signal to Noise Ratio vs Power

Supply with Unweighted Filter (20Hz

to 20kHz)

100

1000

10000

0.01

0.1

RL = 16

Ω, Vcc = 3.3V

Gv = 10, Cb = 1

µF

BW < 125kHz

Tamb = 25

°C

Pout = 140mW

Pout = 280mW

Frequency (Hz)

100

1000

10000

0.01

0.1

RL = 16

Ω, Vcc = 2.6V

Gv = 10, Cb = 1

µF

BW < 125kHz

Tamb = 25

°C

Pout = 80mW

Pout = 160mW

Frequency (Hz)

2.5

3.0

3.5

4.0

4.5

5.0

100

RL=8

Ω

RL=4

Ω

RL=16

Ω

Gv = 2

Cb = Cin = 1µF

THD+N < 0.4%

Tamb = 25°C

Vcc (V)

Figure 70: Signal to Noise Ratio vs Power

Supply with Weighted Filter Type A

Figure 71: Frequency Response Gain vs Cin,

& Cfeed

Figure 72: Signal to Noise Ratio vs Power

Supply with Unweighted Filter (20Hz

to 20kHz)

2.5

3.0

3.5

4.0

4.5

5.0

100

110

RL=8

Ω

RL=4

Ω

RL=16

Ω

Gv = 2

Cb = Cin = 1µF

THD+N < 0.4%

Tamb = 25°C

Vcc (V)

100

1000

10000

-25

-20

-15

-10

-5

Rin = Rfeed = 22k

Ω

Tamb = 25

°C

Cfeed = 2.2nF

Cfeed = 680pF

Cfeed = 330pF

Cin = 470nF

Cin = 82nF

Cin = 22nF

Frequency (Hz)

2.5

3.0

3.5

4.0

4.5

5.0

RL=16

Ω

RL=4

Ω

RL=8

Ω

Gv = 10

Cb = Cin = 1µF

THD+N < 0.7%

Tamb = 25°C

Vcc (V)

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