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BD88420GUL-E2

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Technical Note
4/21
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
www.rohm.com
2011.03 – Rev. A
© 2011 ROHM Co., Ltd. All rights reserved.
●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
* In BD88400GUL the input resister(Ri)=10kΩ, feedback resister(Rf)=10kΩ.
Fig.1 Standby Current vs.
Supply Voltage
0.1n
1n
10n
100n
1u
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Supply Voltage [V]
Standby Current [A
]
SHDNLB=0V
SHDNRB=0V
Fig.3 Stereo Operating
Current vs. Supply voltage
0.0
1.0
2.0
3.0
4.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Supply Voltage [V]
Operating Current [mA]
SHDNLB=VDD
SHDNRB=VDD
* This caracteristics has
hysteresis (40mV typ) by
UV LO.
Fig.2 Monaural Operating
Current vs. Supply Voltage
0.0
1.0
2.0
3.0
4.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Supply Voltage [V]
Operating Current [mA]
SHDNLB=VDD
SHDNRB=0V
* This caracteristics has
hysteresis (40mV typ) by
UV LO.
Fig.4 Negative Voltage vs.
Supply Voltage
-3
-2.5
-2
-1.5
-1
-0.5
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Supply Voltage [V]
VSS Voltage [V]
SHDNLB=VDD
SHDNRB=VDD
No Load
Fig.8 PSRR vs. Frequency
(VDD=3.3V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=3.3V
Ripple = 100mVp-p
BPF
Fig.7 PSRR vs. Frequency
(VDD=2.4V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=2.4V
Ripple = 100mVp-p
BPF
Fig.9 PSRR vs. Frequency
(VDD=5.5V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=5.5V
Ripple = 100mVp-p
BPF
Fig.10 Crosstalk vs.
Frequency (VDD=2.4V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=2.4V
VOUT = 200mVp-p
RL=32
Ω
BPF
Fig.11 Crosstalk vs.
Frequency (VDD=3.3V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=3.3V
VOUT = 200mVp-p
RL=32
Ω
BPF
Fig.12 Crosstalk vs.
Frequency (VDD=5.5V)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
Frequency [Hz]
PSRR [dB]
VDD=5.5V
VOUT = 200mVp-p
RL=32
Ω
BPF
Fig.5 Setup time vs.
Supply Voltage
0
20
40
60
80
100
120
140
160
180
200
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Supply Voltage [V]
Setup time [us]
SHDNLB=SHDNRB
=L->H
VSS 90% Setup time
No Load
Fig.6 Maximum power vs.
Supply Voltage
0
20
40
60
80
100
120
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Supply Voltage [V]
Maximum Output Power [mW]
THD+N
≦
-40dB
20kHz LPF
Stereo
RL=16
Ω
, in phase
RL=16
Ω
, out of phase
RL=32
Ω
, out of phase
RL=32
Ω
, in phase
Technical Note
5/21
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
www.rohm.com
2011.03 – Rev. A
© 2011 ROHM Co., Ltd. All rights reserved.
●Electrical characteristic curves – BD88415GUL (Reference data)
Fig.13 Output Voltage vs.
Input Voltage (VDD=2.4V)
-120
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0
Input Voltage [dBV]
Output Voltage [dBV]
VDD=2.4V
f=1kHz
BPF
RL=32
Ω
RL=16
Ω
Fig.14 Output Voltage vs.
Input Voltage (VDD=3.3V)
-120
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0
Input Voltage [dBV]
Output Voltage [dBV]
VDD=3.3V
f=1kHz
BPF
RL=32
Ω
RL=16
Ω
Fig.15 Output Voltage vs.
Input Voltage (VDD=5.5V)
-120
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0
Input Voltage [dBV]
Output Voltage [dBV]
VDD=5.5V
f=1kHz
BPF
RL=32
Ω
RL=16
Ω
Fig.16 Gain vs. Frequency
(VDD=2.4V)
-10
-8
-6
-4
-2
0
2
4
6
8
10
10 100 1k 10k 100k
Frequency [Hz]
Gain [dB]
VDD=2.4V
Po=10mW
RL=16
Ω
Input coupling
capacitor = 1.0uF
RL=32
Ω
RL=16
Ω
Fig.17 Gain vs. Frequency
(VDD=3.3V)
-10
-8
-6
-4
-2
0
2
4
6
8
10
10 100 1k 10k 100k
Frequency [Hz]
Gain [dB]
VDD=3.3V
Po=10mW
RL=16
Ω
Input coupling
capacitor = 1.0uF
RL=32
Ω
RL=16
Ω
Fig.18 Gain vs. Frequency
(VDD=5.5V)
-10
-8
-6
-4
-2
0
2
4
6
8
10
10 100 1k 10k 100k
Frequency [Hz]
Gain [dB]
VDD=5.5V
Po=10mW
RL=16
Ω
Input coupling
capacitor = 1.0uF
RL=32
Ω
RL=16
Ω
Fig.19 THD+N vs. Output
Power (VDD=2.4V, RL=16Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=2.4V
20kHz-LPF
f=1kHz
Stereo
RL=16
Ω
In phase
Out of phase
Fig.20 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=16
Ω
In phase
Out of phase
Fig.21 THD+N vs. Output
Power (VDD=5.5V, RL=16Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=5.5V
20kHz-LPF
f=1kHz
Stereo
RL=16
Ω
In phase
Out of phase
Fig.22 THD+N vs. Output
Power (VDD=2.4V, RL=32Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=2.4V
20kHz-LPF
f=1kHz
Stereo
RL=32
Ω
In phase
Out of phase
Fig.23 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=32
Ω
In phase
Out of phase
Fig.24 THD+N vs. Output
Power (VDD=5.5V, RL=32Ω)
0.001
0.01
0.1
1
10
100
1n 100n 10u 1m 100m
Output Power [W]
THD+N [%]
VDD=5.5V
20kHz-LPF
f=1kHz
Stereo
RL=32
Ω
In phase
Out of phase
Technical Note
6/21
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
www.rohm.com
2011.03 – Rev. A
© 2011 ROHM Co., Ltd. All rights reserved.
●Electrical characteristic curves – BD88415GUL (Reference data) – Continued
Fig.31 Noise Spectrum
(VDD=2.4V)
-140
-120
-100
-80
-60
-40
-20
0
10 100 1k 10k 100k
Frequency [Hz]
Spectrum [dBV]
VDD=2.4V
Input connect
to the ground
with 1uF
Fig.32 Noise Spectrum
(VDD=3.3V)
-140
-120
-100
-80
-60
-40
-20
0
10 100 1k 10k 100k
Frequency [Hz]
Spectrum [dBV]
VDD=3.3V
Input connect
to the ground
with 1uF
Fig.33 Noise Spectrum
(VDD=5.5V)
-140
-120
-100
-80
-60
-40
-20
0
10 100 1k 10k 100k
Frequency [Hz]
Spectrum [dBV]
VDD=5.5V
Input connect
to the ground
with 1uF
Fig.25 THD+N vs. Frequency
(VDD=2.4V, RL=16Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=2.4V
RL=16
Ω
20kHz-LPF
Stereo (in phase)
Po=10mW
Po=1mW
Po=0.1mW
Fig. 26 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
Po=10mW
Po=1mW
Po=0.1mW
Fig. 27 THD+N vs. Frequency
(VDD=5.5V, RL=16Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=5.5V
RL=16Ω
20kHz-LPF
Stereo (in phase)
Po=10mW
Po=1mW
Po=0.1mW
Fig. 28 THD+N vs. Frequency
(VDD=2.4V, RL=32Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=2.4V
RL=32
Ω
20kHz-LPF
Stereo (in phase)
Po=1mW
Po=10mW
Po=0.1mW
Fig. 29 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
Po=1mW
Po=10mW
Po=0.1mW
Fig. 30 THD+N vs. Frequency
(VDD=5.5V, RL=32Ω)
0.001
0.01
0.1
1
10
100
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=5.5V
RL=32Ω
20kHz-LPF
Stereo (in phase)
Po=1mW
Po=10mW
Po=0.1mW
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BD88420GUL-E2

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Audio Amplifiers Audio Amp Headphone 2-CH Stereo 0.08W Class-AB T/R
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