ROHM BD88400GUL, BD88410GUL, BD88415GUL, BD88420GUL Technical data
A
Headphone Amplifiers
Coupling Capacitorless
Headphone Amplifiers
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
No.11102EAT04
●Description
BD88xxxGUL is output coupling capacitorless headphone amplifier. This IC has a negative voltage generator of regulated
type built-in and generates the direct regulated negative voltage from the supply voltage. It is possible to drive headphones
in a ground standard with both voltage of the positive voltage (+2.4V) and the negative voltage (-2.4V). Therefore a
large-capacity output coupling capacitor becomes needless and can reduce a cost, a board area, and the height of the part.
In addition, there is not the signal decrement by the low range to happen by output coupling capacitor and output load
impedance and can output a rich low tone.
●Features
1) 2.4V to 5.5V Single-Supply Operation
2) No Bulky DC-Blocking Capacitors Required
3) No Degradation of Low-Frequency Response Due to Output Capacitors
4) Ground-Referenced Outputs
5) Gain setting
BD88400GUL: Variable gain with external resistors
BD88410GUL: -1.0V/V
BD88415GUL: -1.5V/V
BD88420GUL: -2.0V/V
6) Low THD+N
7) Low Supply Current
8) Integrated Negative Power Supply
9) Integrated Short-Circuit and Thermal-Overload Protection
10) Small package
VCSP50L2 (2.1mm x 2.1mm)
●Applications
Mobile Phones, Smart Phones, PDAs, Portable Audio Players, PCs, TVs, Digital Cameras, Digital Video Cameras,
Electronic Dictionaries, Voice Recorders, Bluetooth Head-sets, etc
●Line up
Supply
Type
BD88400GUL
BD88410GUL -1.0
BD88415GUL -1.5
BD88420GUL -2.0
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© 2011 ROHM Co., Ltd. All rights reserved.
Voltage
2.4～5.5
[V]
Supply
Current
[mA]
2.0
(No signal)
Gain
[V/V]
Variable gain
with external
resister
Maximum
Output Power
[mW]
(VDD=3.3V,RL=16Ω
THD+N≦1%,f=1kHz)
80
1/25
THD+N
[%]
0.006
(VDD=3.3V,RL=16Ω
Po=10mW,f=1kHz)
Noise
Voltage
[µVrms]
10
PSRR
[dB]
-80
(f=217Hz)
Package
VCSP50L2
(2.1mm x 2.1mm)
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Absolute maximum ratings
Parameter Symbol Ratings Unit
Technical Note
SGND to PGND voltage
SVDD to PVDD voltage
SVSS to PVSS voltage
SGND or PGND to SVDD, PVDD voltage
SVSS, PVSS to SGND or PGND voltage
SGND to IN_- voltage
SGND to OUT_- voltage
PGND to C1P- voltage
PGND to C1N- voltage
SGND to SHDN_B- voltage
Input current
Power Dissipation
Storage Temperature Range
* In operating over 25 ℃, de-rate the value to 10.8mW/℃. This value is for mounted on the application board
(Grass-epoxy, size: 40mm x 60mm, H=1.6mm, Top Copper area = 79.9%, Bottom Copper area = 80.2%).
VGG 0.0 V
VDD -0.3～0.3 V
VSS 0.0 V
VDG -0.3～6.0 V
VSG
-3.5～0.3
VIN (SVSS-0.3)～2.8 V
V
OUT
(PGND-0.3)～(PVDD+0.3) V
V
C1P
V
C1N
(SVSS-0.3)～2.8
(PVSS-0.3)～(PGND+0.3)
VSH (SGND-0.3)～(SVDD+0.3) V
IIN
-10～10
PD 1350 * mW
T
STG
-55～150 ℃
●Operating conditions
Parameter Symbol
Min. Typ. Max.
Ratings
V
V
V
mA
Unit
Supply Voltage Range
Operating Temperature Range
V
SVDD,VPVDD
T
OPR
2.4 - 5.5 V
-40 - +85 ℃
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© 2011 ROHM Co., Ltd. All rights reserved.
2/25
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Electrical characteristics
Unless otherwise specified, Ta=25℃, SVDD=PVDD=3.3V, SGND=PGND=0V, SHDNB=SVDD, C1=C2=2.2µF,
RL=No Load, Ri=Rf=10kΩ
Parameter Symbol
Min. Typ. Max.
Limits
Unit Conditions
Supply Current
Shutdown Supply Current IST - 0.1 2 µA SHDNLB=SHDNRB=L
Technical Note
(SHDNLB,SHDNRB)=(H,L) or (L,H),
No signal
SHDNLB=SHDNRB=H,
No signal
Quiescent Supply Current
- 1.3 - mA
I
DD1
I
- 2.0 7.4 mA
DD2
SHDN_B Terminal
H Level Input Voltage VIH 1.95 - - V
L Level Input Voltage VIL - - 0.70 V
Input Leak Current I
- - ±1 µA
LEAK
Headphone Amplifier
Shutdown to Full Operation t
- 80 - µs SHDNLB=SHDNRB=L→H
SON
Offset Voltage VIS - ±0.5 ±5.0 mV
30 60 - mW
Maximum Output Power P
OUT
40 80 - mW
Total Harmonic Distortion
+ Noise
THD+N
- 0.008 0.056 %
- 0.006 0.100 %
Input Impedance ZIN 10 14 19 kΩ
RL=32Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
RL=16Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
RL=32Ω, POUT=10mW, f=1kHz,
20kHz LPF
RL=16Ω, POUT=10mW, f=1kHz,
20kHz LPF
SHDNLB=SHDNRB=H
In BD88400GUL, ZIN = Ri
Gain
BD88400GUL
BD88410GUL -1.05 -1.00 -0.95
AV
BD88415GUL -1.55 -1.50 -1.45
- -1.00 -
In BD88400GUL, Gain is variable
V/V
by the external resister of Ri and Rf.
BD88420GUL -2.06 -2.00 -1.94
Gain match ΔAV - 1 - %
Noise VN - 10 - µVrms 20kHz LPF + JIS-A
Slew Rate SR - 0.15 - V/µs
Maximum Capacitive Load CL - 200 - pF
Crosstalk CT - -90 - dB
Power Supply
Rejection Ratio
Charge-Pump
Oscillator Frequency
PSRR - -80 - dB
f
200 300 430 kHz
OSC
RL=32Ω, f=1kHz, VOUT=200mV
1kHz BPF
f=217Hz, 100mV
P-P
217Hz BPF
Thermal-Shutdown Threshold TSD - 145 - ℃
Thermal-Shutdown Hysteresis T
- 5 - ℃
HYS
‐ripple,
P-P
,
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© 2011 ROHM Co., Ltd. All rights reserved.
3/25
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
]
Technical Note
●Electrical characteristic curves – General Items (Reference data)
Unless otherwise specified, Ta=25℃, SGND=PGND=0V, SHDNLB=SHDNRB=SVDD, C1=C2=2.2µF,
Input coupling capacitor=1µF, RL=No Load
1u
SHDNLB=0V
SHDNRB=0V
100n
10n
* In BD88400GUL the input resister(Ri)=10kΩ, feedback resister(Rf)=10kΩ.
4.0
SHDNLB=VDD
SHDNRB=0V
* This caracteristics has
3.0
hyster esis (40mV typ) by
UVL O.
2.0
4.0
SHDNLB=VDD
SHDNRB=VDD
* This caracteristics has
3.0
hyster esis (40mV typ) by
UVL O.
2.0
Standby Current [A
1n
1.0
Operating Current [mA]
Operating Current [mA]
1.0
0.1n
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Fig.1 Standby Current vs.
0
-0.5
-1
Supply V oltage [V]
Supply Voltage
SHDNLB=VDD
SHDNRB=VDD
No L oad
-1.5
-2
VSS Voltage [V]
-2.5
-3
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Fig.4 Negative Voltage vs.
0
-10
-20
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
10 100 1k 10k 100k
Fig.7 PSRR vs. Frequency
0
-10
-20
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
10 100 1k 10k 100k
Supply V oltage [V]
Supply Voltage
VDD=2.4V
Ripple = 100mVp-p
BPF
Frequency [Hz]
(VDD=2.4V)
VDD=2.4V
VOUT = 200mVp-p
RL=32
Ω
BPF
Frequency [Hz]
Fig.10 Crosstalk vs.
© 2011 ROHM Co., Ltd. All rights reserved.
Frequency (VDD=2.4V)
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0.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Supply V oltage [V]
Fig.2 Monaural Operating
Current vs. Supply Voltage
200
180
160
140
120
100
80
Setup time [us]
60
40
20
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SHDNLB =SHDNRB
=L->H
VSS 90% Setup time
No Load
Supply V oltage [V]
Fig.5 Setup time vs.
Supply Voltage
0
VDD=3.3V
-10
Ripple = 100mVp-p
-20
BPF
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
10 100 1k 10k 100k
Frequency [Hz]
Fig.8 PSRR vs. Frequency
(VDD=3.3V)
0
VDD=3.3V
-10
VOUT = 200mVp-p
-20
RL=32
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
10 100 1k 10k 100k
Ω
BPF
Frequency [Hz]
Fig.11 Crosstalk vs.
Frequency (VDD=3.3V)
4/25
0.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Supply V oltage [V]
Fig.3 Stereo Operating
Current vs. Supply voltage
120
100
80
60
40
20
Maximum Output Po wer [mW]
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
RL=16Ω, in phase
RL=16Ω, out of phase
RL=32Ω, in phase
RL=32Ω, out of phase
THD+N≦-40d B
20kHz LPF
Stereo
Supply V oltage [V]
Fig.6 Maximum power vs.
Supply Voltage
0
VDD=5.5V
-10
Ripple = 100mVp-p
-20
BPF
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
10 100 1k 10k 100k
Fre quency [H z]
Fig.9 PSRR vs. Frequency
(VDD=5.5V)
0
VDD=5.5V
-10
VOUT = 200mVp-p
-20
RL=32
-30
-40
-50
-60
PSRR [dB]
-70
-80
-90
-100
Ω
BPF
10 100 1k 10k 100k
Frequency [Hz]
Fig.12 Crosstalk vs.
Frequency (VDD=5.5V)
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Electrical characteristic curves – BD88415GUL (Reference data)
0
-20
VDD=2.4V
f=1kHz
BPF
RL=32
VDD=3.3V
-20
0
f=1kHz
BPF
Ω
RL=32
Ω
-40
-60
-80
Output V olta ge [dBV]
-100
-120
-120 -100 -80 -60 -40 -20 0
Fig.13 Output Voltage vs.
Input Voltage (VDD=2.4V)
10
8
6
4
2
0
Gain [dB]
-2
-4
-6
-8
-10
10 100 1k 10k 100k
Fig.16 Gain vs. Frequency
Input Voltage [dBV]
VDD=2.4V
Po=10mW
RL=16
Ω
Input coupling
capacitor = 1.0uF
Frequency [Hz]
(VDD=2.4V)
RL=32
RL=16
RL=16
Ω
Ω
Ω
-40
-60
-80
Output V olta ge [dBV]
-100
-120
-120 -100 -80 -60 -40 -20 0
Input Voltage [dBV]
RL=16
Fig.14 Output Voltage vs.
Input Voltage (VDD=3.3V)
10
8
6
4
2
0
Gain [dB]
-2
VDD=3.3V
Po=10mW
-4
RL=16
-6
-8
-10
10 100 1k 10k 100k
Ω
Input coupling
capacitor = 1.0uF
Frequency [Hz]
RL=16
RL=32
Fig.17 Gain vs. Frequency
(VDD=3.3V)
Ω
Ω
Ω
100
100
10
10
1
0.1
THD+N [%]
VDD=2.4V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=16
0.001
1n 100n 10u 1m 100m
Fig.19 THD+N vs. Output
Power (VDD=2.4V, RL=16Ω)
100
In p hase
Ω
Output P owe r [W]
Out of phase
1
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=16
0.001
1n 100n 10u 1m 100m
In p hase
Ω
Output P owe r [W]
Out of phase
Fig.20 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
10
1
0.1
THD+N [%]
VDD=2.4V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=32
0.001
1n 100n 10u 1m 100m
In p hase
Ω
Output P ower [W]
Fig.22 THD+N vs. Output
Power (VDD=2.4V, RL=32Ω)
Out of phase
10
1
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=32
0.001
1n 100n 10u 1m 100m
Ω
In p hase
Out of phase
Output P ower [W]
Fig.23 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
Technical Note
VDD=5.5V
0
f=1kHz
BPF
-20
-40
-60
-80
Output V olta ge [dBV]
-100
-120
-120 -100 -80 -60 -40 -20 0
Fig.15 Output Voltage vs.
Input Voltage (VDD=5.5V)
10
8
6
4
2
0
Gain [dB]
-2
VDD=5.5V
Po=10mW
-4
RL=16
-6
-8
-10
Ω
Input coupling
capacitor = 1.0uF
10 100 1k 10k 100k
Fig.18 Gain vs. Frequency
(VDD=5.5V)
100
10
1
0.1
THD+N [%]
VDD=5.5V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=16
0.001
Ω
1n 100n 10u 1m 100m
Fig.21 THD+N vs. Output
Power (VDD=5.5V, RL=16Ω)
100
10
1
0.1
THD+N [%]
VDD=5.5V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=32
0.001
Ω
1n 100n 10u 1m 100m
Fig.24 THD+N vs. Output
Power (VDD=5.5V, RL=32Ω)
RL=32
RL=16
Input Voltage [dBV]
RL=16
RL=32
Frequency [Hz]
In p hase
Out of phase
Output P owe r [W]
In p hase
Out of phase
Output P ower [W]
Ω
Ω
Ω
Ω
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© 2011 ROHM Co., Ltd. All rights reserved.
5/25
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Electrical characteristic curves – BD88415GUL (Reference data) – Continued
100
10
1
0.1
THD+N [%]
VDD=2.4V
RL=16
Ω
20kHz-LP F
Stereo (in phase)
Po=1mW
Po=0.1mW
100
10
1
0.1
THD+N [%]
VDD=3.3V
RL=16Ω
20kHz-LPF
Ste reo (in phase )
Po=0.1mW
Po=1mW
0.01
0.001
10 100 1k 10k 100k
Fig.25 THD+N vs. Frequency
(VDD=2.4V, RL=16Ω)
Frequency [Hz]
Po=10mW
0.01
0.001
10 100 1k 10k 100k
Po=10mW
Frequency [Hz]
Fig. 26 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
100
10
1
0.1
THD+N [%]
VDD=2.4V
RL=32
Ω
20kHz-LP F
Stereo (in phase)
Po=10mW
Po=0.1mW
100
10
1
0.1
THD+N [%]
VDD=3.3V
RL=32Ω
20kHz-LPF
Ste reo (in phase )
Po=0.1mW
Po=10mW
0.01
0.001
10 100 1k 10k 100k
Fig. 28 THD+N vs. Frequency
(VDD=2.4V, RL=32Ω)
Frequency [Hz]
Po=1mW
0.01
0.001
10 100 1k 10k 100k
Frequency [Hz]
Po=1mW
Fig. 29 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
0
VDD=2.4V
-20
Input connect
to the ground
-40
with 1uF
-60
-80
Spectrum [dB V]
-100
-120
-140
10 100 1k 10k 100k
Frequency [Hz]
Fig.31 Noise Spectrum
(VDD=2.4V)
0
VDD=3.3V
-20
Input connect
to the ground
-40
with 1 uF
-60
-80
Spectrum [dBV]
-100
-120
-140
10 100 1k 10k 100k
Frequency [Hz]
Fig.32 Noise Spectrum
(VDD=3.3V)
Technical Note
100
VDD=5.5V
RL=16Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=1mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Fig. 27 THD+N vs. Frequency
(VDD=5.5V, RL=16Ω)
100
VDD=5.5V
RL=32Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=10mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Fig. 30 THD+N vs. Frequency
(VDD=5.5V, RL=32Ω)
0
VDD=5.5V
-20
Input connect
to the ground
-40
with 1 uF
-60
-80
Spectrum [dBV]
-100
-120
-140
10 100 1k 10k 100k
Fig.33 Noise Spectrum
(VDD=5.5V)
Po=0.1mW
Po=10mW
Frequency [Hz]
Po=0.1mW
Po=1mW
Frequency [Hz]
Frequency [Hz]
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© 2011 ROHM Co., Ltd. All rights reserved.
6/25
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Electrical characteristic curves – BD88400GUL (Reference data)
VDD=3.3V
0
f=1kHz
BPF
-20
-40
-60
-80
Output V olta ge [dBV]
-100
-120
-120 -100 -80 -60 -40 -20 0
Input Voltage [dBV]
Fig.34 Output Voltage vs.
Input Voltage (VDD=3.3V)
100
10
1
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=32
0.001
Ω
1n 100n 10u 1m 100m
Output P owe r [W]
Fig. 37 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
RL=32
Ω
RL=16
In p hase
Out of phase
Ω
10
VDD=3.3V, Po=10mW
8
Ri=10kΩ, Input co upling
6
capacitor = 1.0uF
4
2
0
Gain [dB]
-2
-4
-6
-8
-10
10 100 1k 10k 100k
Frequency [Hz]
RL=16
RL=32
Fig.35 Gain vs. Frequency
(VDD=3.3V)
100
VDD=3.3V
RL=16Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=1mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Po=0.1mW
Frequency [Hz]
Fig.38 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
Ω
Ω
Po=10mW
0
VDD=3.3V
-20
Input connect
to the ground
-40
with 1uF
-60
-80
Spectrum [dBV]
-100
-120
-140
10 100 1k 10k 100k
Frequency [Hz]
Fig.40 Noise Spectrum
(VDD=3.3V)
Technical Note
100
10
1
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=16
0.001
Ω
1n 100n 10u 1m 100m
Output P ower [W]
Fig.36 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
VDD=3.3V
RL=32Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=1mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Fig. 39 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
In p hase
Out o f p hase
Po=0.1mW
Po=10mW
Frequency [Hz]
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© 2011 ROHM Co., Ltd. All rights reserved.
7/25
2011.03 – Rev.
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
A
●Electrical characteristic curves – BD88410GUL (Reference data)
VDD=3.3V
0
f=1kHz
BPF
-20
-40
-60
-80
Output V olta ge [dBV]
-100
-120
-120 -100 -80 -60 -40 -20 0
RL=32
Input Voltage [dBV]
Fig.41 Output Voltage vs.
Input Voltage (VDD=3.3V)
100
10
1
In p hase
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=32
0.001
Ω
1n 100n 10u 1m 100m
Output P ower [W]
Fig. 44 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
Ω
RL=16
Ω
Out o f p hase
10
VDD=3.3V
8
Po=10mW
6
Input coupling
4
capacitor = 1.0uF
2
0
Gain [dB]
-2
-4
-6
-8
-10
10 100 1k 10k 100k
Frequency [Hz]
RL=16
RL=32
Fig.42 Gain vs. Frequency
(VDD=3.3V)
100
VDD=3.3V
RL=16Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=1mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Po=0.1mW
Po=10mW
Frequency [Hz]
Fig.45 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
Ω
Ω
0
VDD=3.3V
-20
Input connect
to the ground
-40
with 1uF
-60
-80
Spectrum [dBV]
-100
-120
-140
10 100 1k 10k 100k
Frequency [Hz]
Fig.47 Noise Spectrum
(VDD=3.3V)
Technical Note
100
10
1
0.1
THD+N [%]
VDD=3.3V
20kHz-LP F
f=1kHz
0.01
Stereo
RL=16
0.001
Ω
1n 100n 10u 1m 100m
Output P ower [W]
Fig.43 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
VDD=3.3V
RL=32Ω
10
20kHz-LPF
Ste reo (in phase )
1
Po=1mW
0.1
THD+N [%]
0.01
0.001
10 100 1k 10k 100k
Fig. 46 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
In p hase
Out o f p hase
Po=0.1mW
Po=10mW
Frequency [Hz]
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