CS42L51(2005) View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS42L51
(Rev.:2005)

Low Power, Stereo CODEC with Headphone Amp

Cirrus Logic 

CS42L51

7. ANALOG PERFORMANCE PLOTS

7.1 Headphone THD+N versus Output Power Plots

Test conditions (unless otherwise specified): Input test signal is a 997 Hz sine wave; measurement band-

width is 10 Hz to 20 kHz; Fs = 48 kHz. Plots were taken from the CDB42L51 using an Audio Precision an-

alyzer.

-10

-15 VA_HP = VA = 1.8 V

-20

G = 0.6047

G = 0.7099

-25

G = 0.8399

-30

G = 1.0000

-35

G = 1.1430

-40

-45

Legend

-50

d

B

r

-55

A

-60

-65

-70

-75

NOTE: Graph shows the out-

put power per channel (i.e.

Output Power = 23 mW into

single 16 Ω and 46 mW into

stereo 16 Ω with THD+N = -

75 dB).

-80

-85

-90

-95

-100

0

10m

20m

30m

40m

50m

60m

70m

80m

W

Figure 28. THD+N vs. Ouput Power per Channel at 1.8 V (16 Ω load)

-10

-15 VA_HP = VA = 2.5 V

-20

-25

G = 0.6047

G = 0.7099

G = 0.8399

-30

G = 1.0000

-35

G = 1.1430

-40

-45

Legend

-50

d

B

r

-55

A

-60

-65

-70

-75

NOTE: Graph shows the out-

put power per channel (i.e.

Output Power = 44 mW into

single 16 Ω and 88 mW into

stereo 16 Ω with THD+N = -

75 dB).

-80

-85

-90

-95

-100

0

10m

20m

30m

40m

50m

60m

70m

80m

W

Figure 29. THD+N vs. Ouput Power per Channel at 2.5 V (16 Ω load)

72

DS679A2

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