YDA137

2

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Terminal configuration

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

VSS

/MUTE

/MONO

VDDL

VSSPL2

OUTPL

VDDPL

OUTML

VSSPL1

HPOL

VPL

INL

VREFL

VSSL

/SLEEP

/PROT

HP

VDDR

VSSPR2

OUTPR

VDDPR

OUTMR

VSSPR1

HPOR

VPR

INR

VREFR

VSSR

<28pin TSSOP Top View>

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Terminal functions

No.

Name

I/O

Function

1

VSS

－

Ground terminal for reference power supply

2

/MUTE

I

Mute control terminal

3

/MONO

I

Monaural control terminal

4

VDDL

－

L-ch power supply terminal for control stage

5

VSSPL2

－

L-ch ground terminal for output stage

6

OUTPL

O

L-ch PWM signal output terminal for positive side

7

VDDPL

－

L-ch power supply terminal for output stage

8

OUTML

O

L-ch PWM signal output terminal for negative side

9

VSSPL1

－

L-ch ground terminal for output stage

10

HPOL

OA

L-ch headphone output terminal

11

VPL

OA

L-ch first stage operational amplifier output terminal

12

INL

IA

L-ch analog signal input terminal

13

VREFL

OA

L-ch reference voltage output terminal

14

VSSL

－

L-ch ground terminal for control stage

15

VSSR

－

R-ch ground terminal for control stage

16

VREFR

OA

R-ch reference voltage output terminal

17

INR

IA

R-ch analog signal input terminal

18

VPR

OA

R-ch first stage operational amplifier output terminal

19

HPOR

OA

R-ch headphone output terminal

20

VSSPR1

－

R-ch ground terminal for output stage

21

OUTMR

O

R-ch PWM signal output terminal for negative side

22

VDDPR

－

R-ch power supply terminal for output stage

23

OUTPR

O

R-ch PWM signal output terminal for positive side

24

VSSPR2

－

R-ch ground terminal for output stage

25

VDDR

－

R-ch power supply terminal for control stage

26

HP

I

Headphone control terminal

27

/PROT

O

Protection detection terminal

28

/SLEEP

I

Sleep control terminal

（

Note） I: Digital input terminal, O: Digital output terminal, IA: Analog input terminal, OA: Analog output terminal