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YAMAHA CORPORATION
YAMAHA CORPORATION

YDA138 Datasheet

STEREO 10W DIGITAL AUDIO POWER AMPLIFIER


YDA138 Datasheet Preview


YDA138
D- 3
STEREO 10W DIGITAL AUDIO POWER AMPLIFIER
Overview
YDA138 (D-3) is a high efficient digital audio power amplifier IC that operates with a single 12V power supply.
An audio power amplifier with a maximum output of 10W (RL=8Ω)×2ch or 20W (RL=4Ω)×1ch can be configured
with one chip.
YDA138 has a “Pure Pulse Direct Speaker Drive Circuit” which directly drives speakers while reducing distortion of
pulse output signal and reducing noise on the signal, and realizes the highest standard low distortion rate characteristics
and low noise characteristics as 10W-class of output digital amplifier IC.
In addition, circuit design with fewer external parts can be made depend on the condition of use because corresponds to
filter less.
YDA138 has 50mW (RL=32Ω)×2ch Class AB headphone amplifiers.
YDA138 provides Over-current protection function for speaker output terminals, IC thermal protection function, POP
noise reduction function, and AM interference measures function as well as power-down function and output mute
function.
Features
Digital Amplifier
Continuous maximum output
10 W×2ch VDDP=12.0V, RL=8Ω, THD+N=10%
20 W×1ch VDDP=12.0V, RL=4Ω, THD+N=10%
Efficiency
www.DataSheet848U.c%omVDDP=12.0V, RL=8Ω, Po=10W
Distortion Rate (THD+N)
0.02 % VDDP=12.0V, RL=8Ω, Po=1.0W
S/N Ratio
103dB VDDP=12.0V, RL=8Ω, Po=10W, VOL[1:0]=H,H
Channel Separation
-70dB VDDP=12.0V, RL=8Ω, VOL[1:0]=H,H
Class AB Headphone Amplifier
Maximum output
50mW×2ch VDDP=12.0V, RL=32Ω, THD+N=10%
Distortion Rate(THD+N)
0.01 % @VDDP=12.0V, RL=32Ω, Pho=30mW
S/N Ratio
95dB VDDP=12.0V, RL=32Ω, Pho=20mW, VOL[1:0]=H,H
Others
Operating power supply range
9.0V to 13.5V
Multi-channel synchronizing operation by
Master/Slave switching function
Carrier frequency switching function
524kHz/466kHz
Sleep function with SLEEPN terminal
Output muting function with MUTEN terminal
Over-current protection function
Thermal protection function
Clock stop detection function
Pop noise reduction function
AM interference measures function
Analog input/BTL (Bridge-Tied Load) output
42-pin plastic SSOP
Pin lead plating with Pd free (YDA138-EZ)
YDA138 CATALOG
CATALOG No.:LSI-4DA138A20
2005.3
Page 1

Terminal configuration
YDA138
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<42-pin SSOP Top View>
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Page 2

YDA138
Terminal function
No. Name
I/O
Function
Voltage
tolerance
1 HPOR
O R-ch Headphone Output terminal
LV
2 AVSS
Pow 5V Analog Ground terminal
LV
3 VSSBGR
Pow Ground terminal for Reference Voltage Supply
LV
4 VREFR
O R-ch Reference Voltage terminal (with external capacitor)
LV
5 INR
I R-ch Analog Signal Input terminal
LV
6 MUTEN
I Mute Control terminal
LV
7 PVDDPR
Pow R-ch 12V-line VDD terminal
HV
8 OUTPR
O R-ch Positive Side Output terminal
HV
9 PVSSR
Pow R-ch 12V-line VSS terminal
HV
10 PVSSR
Pow R-ch 12V-line VSS terminal
HV
11 PVSSR
Pow R-ch 12V-line VSS terminal
HV
12 PVSSR
Pow R-ch 12V-line VSS terminal
HV
13 PVSSR
Pow R-ch 12V-line VSS terminal
HV
14 OUTMR
O R-ch Negative Side Output terminal
HV
15 PVDDMR
Pow R-ch 12V-line VDD terminal
HV
16 PROTN
O Warning Signal Output terminal (O/D)
HV
17 SLEEPN
I Sleep Control terminal
HV
18 DVSS
Pow Digital Ground terminal
LV
19 CKIO
20 XO
21 XI
I/O Clock Input/Output terminal
O CERALOCK connection terminal *1
I CERALOCK connection terminal *1
LV
LV
LV
22 DVDD
I Digital Power Supply terminal (Connect to REFA terminal
LV
outside the IC)
23 MODE0
I Operating Mode Selection terminal
LV
24 MODE1
I Operating Mode Selection terminal
LV
25 MODE2
I Operating Mode Selection terminal
LV
26 VOL0
I Input Sensitivity Setting terminal
LV
27 VOL1
I Input Sensitivity Setting terminal
LV
28 PVDDML
Pow L-ch 12V-line VDD terminal
HV
www.DataSh2e9et4U.cOoUmTML
O L-ch Negative Side Output terminal
HV
30 PVSSL
Pow L-ch 12V-line VSS terminal
HV
31 PVSSL
Pow L-ch 12V-line VSS terminal
HV
32 PVSSL
Pow L-ch 12V-line VSS terminal
HV
33 PVSSL
Pow L-ch 12V-line VSS terminal
HV
34 PVSSL
Pow L-ch 12V-line VSS terminal
HV
35 OUTPL
O L-ch Positive Side Output Terminal
HV
36 PVDDPL
Pow L-ch 12V-line VDD terminal
HV
37 HP
I Headphone Control terminal
LV
38 INL
I L-ch Analog Signal Input terminal
LV
39 VREFL
O L-ch Reference Voltage terminal (with external capacitor)
LV
40 PVDDREG Pow 12V-line PVDD terminal for Regulator Circuit
HV
41 REFA
O 5V Regulator Output terminal (with external capacitor)
LV
42 HPOL
O L-ch Headphone Output terminal
LV
(Note) I: Input terminal, O: Output terminal, I/O: Input/Output terminal, Pow: Power supply terminal
LV: Terminal for VREG power supply voltage range as input voltage range.
HV: Terminal for VDDP power supply voltage range as input voltage range.
*1: CERALOCK which was described above and will be described later is a registered trade mark of
Murata Manufacturing Co.,Ltd.
3
Page 3

Block diagram
YDA138
www.DataSheet4U.com
4
Page 4
Part Number YDA138
Manufactur YAMAHA CORPORATION
Description STEREO 10W DIGITAL AUDIO POWER AMPLIFIER
Total Page 20 Pages
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