No. 6866-14/24

LC75421M

Fader Volume Block Equivalent Circuit Diagram

LFIN

S1

S2

0 dB

26.342 k

4.866 k

50 k

18.792 k

+6.5 dB

+8.5 dB

0 dB

26.342 k

4.866 k

50 k

18.792 k

Same for right channel

Unit: (Resistance:

Ω)

When FADER = “1”, S2 and S3 are ON

When FADER = “0”, S1 and S4 are ON

Total = 50 k

+6.5 dB

+8.5 dB

S4

S3

LFOUT

LROUT

LVref

When –

∞ data is sent to the main volume, S1 and S2 become open, and S3 and S4 simultaneously become ON.

10.284 k

8.169 k

6.489 k

5.154 k

4.094 k

3.252 k

2.583 k

2.052 k

1.630 k

1.295 k

2.188 k

1.923 k

0.608 k

0.231 k

0.050 k

0 dB

–2 dB

–4 dB

–6 dB

–8 dB

–10 dB

–12 dB

–14 dB

–16 dB

–18 dB

–20 dB

–25 dB

–35 dB

–45 dB

–60 dB

–

∞ dB