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參數(shù)資料
| 型號(hào)： | AD8560 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 16 V Rail-to-Rail Buffer Amplifier |
| 中文描述： | 16 V的軌到軌緩沖放大器 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 169K |
| 代理商： | AD8560 |
–9–
AD8560
REV. 0
APPLICATIONS
Theory of Operation
These buffers are designed to drive large capacitive loads in LCD
applications. Each has a high output current drive and rail-to-
V supply. They are also intended for other applications where low
distortion and high output current drive are needed.
Input Overvoltage Protection
As with any semiconductor device, whenever the input exceeds
either supply voltage, attention needs to be paid to the input
overvoltage characteristics. As an overvoltage occurs, the amplifier
could be damaged depending on the voltage level and the magnitude
of the fault current. When the input voltage exceeds either supply
by more than 0.6 V, internal pin junctions will allow current to
flow from the input to the supplies.
This input current is not inherently damaging to the device as
long as it is limited to 5 mA or less. If a condition exists using
the buffers where the input exceeds the supply by more than 0.6 V,
a series external resistor should be added. The size of the resistor
can be calculated by using the maximum overvoltage divided by
5 mA. This resistance should be placed in series with the input
exposed to an overvoltage.
Output Phase Reversal
The buffer family is immune to phase reversal. Although the device’s
output will not change phase, large currents due to input overvoltage
could damage the device. In applications where the possibility exists
of an input voltage exceeding the supply voltage, overvoltage protec-
tion should be used as described in the previous section.
Total Harmonic Distortion (THD+N)
The buffer family features low total harmonic distortion. The total
harmonic distortion plus noise for the buffer over the entire
supply range is below 0.08%. When the device is powered from
a 16 V supply, the THD + N stays below 0.03%. Figure 1 shows
the AD8560’s THD + N versus the frequency performance.
FREQUENCY – Hz
20
30k
T
100
1k
10k
10
1
0.01
0.1
V
S
= 2.5V
V
S
= 8V
Figure 1. THD + N vs. Frequency
Short Circuit Output Conditions
The buffer family does not have internal short circuit protection
circuitry. As a precautionary measure, do not short the output
directly to the positive power supply or to the ground.
It is not recommended to operate the AD8560 with more than
35 mA of continuous output current. The output current can be
limited by placing a series resistor at the output of the amplifier
whose value can be derived using the following equation:
R
V
mA
X
S
≥
35
For a 5 V single-supply operation,
R
X
should have a minimum
value of 143
.
Recommended Land Pattern for the AD8560
Figure 2 is a recommended land pattern for the AD8560 PCB
design. The recommended thermal pad size for the PCB design
matches the dimensions of the exposed pad on the bottom of
the package. The solder mask design for improved thermal pad
contact to the exposed pad and reliability uses a stencil pattern
for approximately 85% solder coverage. A minimum clearance
of 0.25 mm is maintained on the PCB between the outer edges
of the thermal pad and the inner edges of the pattern for the
land to avoid shorting. For better thermal performance, thermal
vias should also be used. Since the AD8560 is relatively a low
power part, just soldering the exposed package pad to the PCB
thermal pad should provide sufficient electrical performance.
0.65
SOLDER MASK
BOARD METALLIZATION
1.95
2.1
0.25
0.875
0.20
0.05
0.1
0.4
0.9
0.28 0.75
TYP 16 PL
SYMM C
L
SYMM C
L
Figure 2. 16-Lead 4 x 4 Land Pattern
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8560ACP | 16 V Rail-to-Rail Buffer Amplifier |
| AD8561 | Ultrafast 7 ns Single Supply Comparator(超快單電源比較器) |
| AD8563 | 1.8 V to 5 V Auto-Zero, In-Amp with Shutdown |
| AD8563ARMZ-R2 | 1.8 V to 5 V Auto-Zero, In-Amp with Shutdown |
| AD8563ARMZ-REEL | 1.8 V to 5 V Auto-Zero, In-Amp with Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8560ACP | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:16 V Rail-to-Rail Buffer Amplifier |
| AD8560ACP-REEL | 制造商:Analog Devices 功能描述:OP Amp Quint GP R-R I/O ±8V/16V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:OP AMP QUINT GP R-R I/O 8V/16V 16LFCSP EP - Tape and Reel |
| AD8560ACP-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Quint GP R-R I/O ±8V/16V 16-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:5-CHANNEL 16V LCD BUFFER - Tape and Reel |
| AD8561 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Ultrafast 7 ns Single Supply Comparator |
| AD8561_13 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Ultrafast 7 ns Single Supply Comparator |
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