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PDF APA2718 Data sheet ( Hoja de datos )
| Número de pieza | APA2718 | |
| Descripción | 100mW Stereo Cap-Free Headphone Driver | |
| Fabricantes | Anpec Electronics Coropration | |
| Logotipo |  |
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APA2178
100mW Stereo Cap-Free Headphone Driver
Features
• No Output Capacitor Required
• Operating Voltage: 1.8V~4.5V
• Supply Current
– I =5mA at V =3.3V
DD DD
• Low Shutdown Current
– IDD=1µA at VDD=3.3V
• Meeting VISTA Requirements
• Output Power
at 1% THD+N
–
70mW,
at
V =3.3V,
DD
R
L
=
16Ω
at 10% THD+N
– 100mW, at VDD=3.3V, RL = 16Ω
• Less External Components Required
• High PSRR: 78dB at 217Hz
• Short-Circuit and Thermal Protection
• ± 8KV ESD Performance
• Surface-Mount Packaging
– WLCSP2x2-16
• Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
General Description
The APA2178 is a stereo, fixed gain, Cap-Free headphone
driver which is available in a WLCSP2x2-16 package.
The APA2178 is a ground-reference output, and doesn’t
need the output capacitors for DC blocking. The advan-
tages of eliminating the output capacitor are saving the
cost, PCB’s space, and component height.
The built-in gain setting can minimize the external com-
ponent counts and save the PCB space. High PSRR pro-
vides increased immunity to noise and RF rectification. In
addition to these features, a fast startup time and small
package size make the APA2178 an ideal choice for por-
table multimedia device.
Moreover, the APA2178 is also equipped other features.
For example, it is capable of driving 100mW at 3.3V into
16Ω, at THD+N=10% and provides thermal and short cir-
cuit protection.
Applications
• Handsets
• PDAs
• Portable multimedia devices
• Notebooks
R-CH
Input
RIN
L-CH
Input
LIN
Shutdown
Control
RSD
LSD
www.DataSheet4U.com
APA2178
Stereo
Headphone
ROUT
LOUT
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Jul., 2009
1
www.anpec.com.tw
1 page  
APA2178
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over VDD=PVDD=3.3V, VPGND=VGND=0V, and CCPO=CCPF=1µF.
Typical values are at TA=25oC.
Symbol
Parameter
Test Conditions
APA2178
Min. Typ. Max.
VDD=4.5V, TA=25 C (CONT.)
Crosstalk Channel Separation
fin = 1kHz
PO = 15mW, RL = 16Ω
PO = 15mW, RL = 32Ω
VO = 0.31Vrms, RL = 300Ω
VO = 0.31Vrms, RL = 10kΩ
With A-weighting Filter
75
- 80 -
95
100
S/N Signal-to-Noise Ratio
VDD=3.3V, TA=25 C
PO Output Power (Stereo, in Phase)
THD+N
Total Harmonic Distortion Pulse
Noise
Crosstalk Channel Separation
PO = 100mW, RL = 32Ω
VO = 3.1Vrms, RL = 10kΩ
THD+N = 1%, fin=1kHz
RL = 16Ω
RL = 32Ω
THD+N = 10%, fin=1kHz
RL = 16Ω
RL = 32Ω
fin = 1kHz
PO = 50mW, RL = 16Ω
PO = 50mW, RL = 32Ω
VO = 1.6Vrms, RL = 300Ω
VO = 1.6Vrms, RL = 10kΩ
fin = 1kHz
PO = 7mW, RL = 16Ω
PO = 7mW, RL = 32Ω
VO = 0.23Vrms, RL = 300Ω
VO = 0.23Vrms, RL = 10kΩ
With A-weighting Filter
- 100 -
105
70
55 70
-
100
80 100
-
0.03
- 0.02 -
0.005
0.003
75
- 85 -
95
95
S/N Signal-to-Noise Ratio
VDD=1.8V, TA=25 C
PO Output Power (Stereo, in Phase)
www.DataSheet4U.com
THD+N
Total Harmonic Distortion Pulse
Noise
PO = 50mW, RL = 32Ω
VO = 2.3Vrms, RL = 10kΩ
THD+N = 1%, fin=1kHz
RL = 32Ω
THD+N = 10%, fin=1kHz
RL = 32Ω
fin = 1kHz
PO = 9mW, RL = 32Ω
VO = 0.85Vrms, RL = 300Ω
VO = 0.85Vrms, RL = 10kΩ
- 95 -
100
10 13
15 20
-
-
0.03
--
0.007
0.005
Unit
dB
dB
mW
%
dB
dB
mW
%
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Jul., 2009
5
www.anpec.com.tw
5 Page 
APA2178
Typical Operating Characteristics (Cont.)
Output Noise Voltage vs. Frequency
50µ
10µ
VDD=3.3V
RL=16Ω
Cin=1µF
A-Weighting
1µ 20
100
1k
Frequency (Hz)
10k 20k
THD+N vs. Output Power
10 VDD=3.3V
RL=32Ω
Cin=1µF
BW<80kHz
1
fin=20kHz
0.1
fin=20Hz
fin=1kHz
0.01 1m
10m
Output Power (W)
100m 200m
THD+N vs. Output Power
10 VDD=3.3V
fin=1kHz
RL=32Ω
Cin=1µF
1 BW<80kHz
Stereo, in
Phase
Stereo, 180o
out of Phase
0.1 Mono
0.01 0
40m
80m 120m 160m
Output Power (W)
THD+N vs. Frequency
10
VDD=3.3V
RL=32Ω
Cin=1µF
1 PO=50mW
BW<22kHz
0.1
0.01
0.001 20
Left Channel
Right Channel
100 1k
Frequency (Hz)
10k 20k
Crosstalk vs. Frequency
+0
-10
-20
VDD=3.3V
RL=32Ω
Cin=1µF
-30 PO=7mW
-40 BW<80kHz
-50
-60
-70
-80 Left to Right
-90
-100
www.DataShee-t141U0 .com
Right to Left
-12020
100 1k
Frequency (Hz)
10k 20k
Output Noise Voltage vs. Frequency
50µ
10µ
VDD=3.3V
RL=32Ω
Cin=1µF
1µ A-Weighting
20 100
1k
Frequency (Hz)
10k 20k
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Jul., 2009
11
www.anpec.com.tw
11 Page | ||
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