TS925I(1999) データシートの表示（PDF） - STMicroelectronics

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TS925I
(Rev.:1999)

RAIL TO RAIL HIGH OUTPUT CURRENT QUAD OPERATIONAL AMPLIFIER

STMicroelectronics 

Figure 2 : Frequency Response of the Global

Preamplifier Chain

70

60

50

40

30

20

100

1000

10000 100000 1000000 10000000 1.0E+08

frequency (Hz)

TS925

Headphone amplifier : the operators A2 and A3

are organized in a push-pull configuration with a

gain of 5. The stereo inputs can be connected to a

CD-player and the TS925 drives directly the head-

phone speakers.This configuration shows the abil-

ity of the circuit to drive 32Ω load with a maximum

output swing and a high fidelity for reproducing

sound and music.

Figure 4 shows the available signal swing at the

headset outputs : two other rail to rail competitor

parts are employed in the same circuit for compari-

son (note the much reduced clipping level and

crossover distortion)

Figure 4 : Maximum Voltage Swing at

Headphone Outputs (RL = 32Ω)

Figure 3 : Voltage Noise Density versus

Frequency at Preamplifier Output

15

14

13

12

11

10

9

8

7

10

1 00

1000

10000

frequency (Hz)

1 00000

Figure 5 : THD+Noise versus Frequency

(headphone outputs)

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0

100

1000

Hz

10000

100000

11/16

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