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PDF APA2175 Data sheet ( Hoja de datos )
| Número de pieza | APA2175 | |
| Descripción | Stereo Cap-Free Line Driver | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APA2175 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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APA2175
Stereo Cap-Free Line Driver
Features
General Description
• Operating Voltage: 2.3V-4.5V
The APA2175 is a stereo, fixed gain, single supply, and
• Supply Current
cap-free line driver, which is available in TQFN4x4-20B
- I =5mA at V =3.3V
DD DD
• Low Shutdown Current
- IDD=1µA at VDD=3.3V
• Ground Reference Output
and TSSOP-16 packages.
The APA2175 is ground-reference output, and no need
the output capacitors for DC blocking. The advantages of
eliminating the output capacitor are saving the cost, elimi-
nating component height, and improving the low frequency
- No Output Capacitor Required (for DC Blocking) response.
- Save the PCB Space
The internal fixed gain setting (-1.5V/V) can minimize the
- Reduce the BOM Costs
external component counts and save the PCB space.
- Improve the Low Frequency Response
High PSRR provides increased immunity to noise and
• Output Voltage Swing Can Reach 2Vrms/Ch into RF rectification. The independent shutdown control of
600Ω at VDD=3.3V
• High PSRR: 78dB at 217Hz
APA2175 is for right channel and left channel.
The APA2175 is capable of driving 2Vrms at 3.3V into
• Fast Start-Up Time: 16ms
600Ω load, and provides thermal protection.
• Integrate the De-pop Circuitry
• Separate Shutdown Function for Flexible Applica-
Simplified Application Circuit
tion
• Thermal Protection
• Surface-Mount Packaging
- TQFN4x4-20B (with Enhanced Thermal Pad)
- TSSOP-16
• Lead Free and Green Devices Available
Stereo
Input
Signal
RIN
LIN
Shutdown RSD
Control LSD
APA2175
ROUT Stereo
LOUT Line-Out
Signal
(RoHS Compliant)
Applications
• Set-Top Boxes
• CD / DVD Players
• LCD TVs
• HTIBs (Home Theater in Box)
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., 2010
1
www.anpec.com.tw
1 page  
APA2175
Typical Operating Characteristics
THD+N vs. Output Voltage
10
RL=600Ω
fin=1kHz
1 AV=-1.5V/V
0.1
0.01
0.001
10m
VDD=4.5V
VDD=3.3V
VDD=2.3V
100m
1
Output Voltage (V)
5
THD+N vs. Frequency
1
VDD=3.3V
RL=600Ω
Ci=1µF
AV=-1.5V/V
0.1 BW<80kHz
VO=0.1Vrms
0.01
0.00120
VO=1Vrms
VO=2Vrms
100 1k
Frequency (Hz)
10k 20k
Crosstalk vs. Frequency
+0
VDD=3.3V
-20
RL=600Ω
AV=-1.5V/V
Ci=1µF
-40 VO=2Vrms
-60
-80
-100
-120
20
Left to Right
Right to Left
100 1k
Frequency (Hz)
10k 20k
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Jul., 2010
THD+N vs. Output Voltage
10
RL=100kΩ
fin=1kHz
1 AV=-1.5V/V
0.1
0.01
0.001
10m
VDD=4.5V
VDD=3.3V
VDD=2.3V
100m
1
Output Voltage (V)
5
THD+N vs. Frequency
1
VDD=3.3V
RL=100kΩ
Ci=1µF
AV=-1.5V/V
0.1 BW<80kHz
VO=0.1Vrms
0.01
VO=1Vrms
0.00120
VO=2Vrms
100 1k
Frequency (Hz)
10k 20k
Crosstalk vs. Frequency
+0
VDD=3.3V
-20 RL=100kΩ
AV=-1.5V/V
Ci=1µF
-40 VO=2Vrms
-60
-80
-100
-120
20
Left to Right
Right to Left
100 1k
Frequency (Hz)
10k 20k
5 www.anpec.com.tw
5 Page 
APA2175
Function Description
Line Driver Operation
VOUT
Conventional Line Driver
VOUT
VDD
VDD/2
0
VDD
0
Cap-free Line Driver
VSS
Figure 1. Cap-free Line Driver’s Operation
Shutdown Function
In order to reduce power consumption while not in use,
the APA2175 contains two shutdown controllers to allow
either channel being independent and externally turns off
the amplifier bias circuitry. LSD controls the left channel
and RSD controls the right channel. This shutdown fea-
ture turns the amplifier off when logic low is placed on the
RSD and LSD pins for the APA2175. The trigger point be-
tween a logic high is 1.0V and logic low level is 0.35V. It is
recommended to switch between ground and the supply
voltage V to provide maximum device performance. By
DD
switching the both RSD and LSD pins to the low level, the
amplifier enters a low-consumption current circumstance,
charge pump is disabled, and I for the APA2175 is in
DD
shutdown mode. The charge pump is enabled once ei-
ther RSD or LSD pin is pulled to high. In normal operating,
the APA2175’s RSD and LSD pins should be pulled to a
high level to keep the IC out of the shutdown mode. The
RSD and LSD pins should be tied to a definite voltage to
avoid unwanted circumstance changes.
The APA2175’s line drivers use a charge pump to invert
the positive power supply (VDD) to negative power supply
(VSS), see figure1. The line drivers operate at this bipolar
power supply (VDD and VSS) and the outputs reference re-
fers to the ground. This feature eliminates the output ca-
pacitor that is using in conventional single-ended line
drive amplifier. Compare with the single power supply
amplifier, the power supply range has almost doubled.
Thermal Protection
The thermal protection circuit limits the junction tempera-
ture of the APA2175. When the junction temperature ex-
ceeds TJ=+150OC, a thermal sensor turns off the driver,
allowing the devices to cool. The thermal sensor allows
the driver to start-up after the junction temperature down
about 125OC. The thermal protection is designed with a
25OC hysteresis to lower the average T during continu-
J
ous thermal overload conditions, increasing lifetime of
the ICs.
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Jul., 2010
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet APA2175.PDF ] | |
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