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PDF AD8565 Data sheet ( Hoja de datos )
| Número de pieza | AD8565 | |
| Descripción | 16 V Rail-to-Rail Operational Amplifiers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Single-supply operation: 4.5 V to 16 V
Input capability beyond the rails
Rail-to-rail output swing
Continuous output current: 35 mA
Peak output current: 250 mA
Offset voltage: 10 mV
Slew rate: 6 V/μs
Unity gain stable with large capacitive loads
Supply current: 700 μA per amplifier
Qualified for automotive applications
APPLICATIONS
LCD reference drivers
Portable electronics
Communications equipment
Automotive infotainment systems
GENERAL DESCRIPTION
The AD8565/AD8566/AD8567 are low cost, single-supply, rail-
to-rail input and output operational amplifiers optimized for
LCD monitor applications. They are built on an advanced high
voltage CBCMOS process. The AD8565 contains a single
amplifier, the AD8566 has two amplifiers, and the AD8567 has
four amplifiers.
These LCD op amps have high slew rates, 35 mA continuous
output drive, 250 mA peak output drive, and a high capacitive
load drive capability. They have a wide supply range and offset
voltages below 10 mV. The AD8565/AD8566/AD8567 are ideal
for LCD grayscale reference buffer and VCOM applications.
The AD8565/AD8566/AD8567 are specified over the −40°C to
+85°C temperature range. The AD8565 single is available in a 5-
lead SC70 package. The AD8566 dual is available in an 8-lead
MSOP package. The AD8567 quad is available in a 14-lead
TSSOP package and a 16-lead LFCSP package.
The AD8566WARMZ is the automotive grade version.
16 V Rail-to-Rail
Operational Amplifiers
AD8565/AD8566/AD8567
PIN CONFIGURATIONS
AD8565
OUT 1
5 V–
V+ 2
+IN 3
4 –IN
TOP VIEW
(Not to Scale)
Figure 1. 5-Lead SC70 Pin Configuration
OUT A 1
AD8566 8 V+
–IN A 2
7 OUT B
+IN A 3
6 –IN B
V– 4
TOP VIEW
5 +IN B
(Not to Scale)
Figure 2. 8-Lead MSOP Pin Configuration
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3
V+ 4
AD8567
TOP VIEW
(Not to Scale)
12 +IN D
11 V–
+IN B 5
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 3. 14-Lead TSSOP Pin Configuration
16 15 14 13
–IN A 1
12 –IN D
+IN A 2 AD8567 11 +IN D
TOP VIEW
V+ 3 (Not to Scale) 10 V–
+IN B 4
9 +IN C
5678
NOTES
1. THE EXPOSED PAD MUST BE
CONNECTED TO PIN 3, THAT IS, V+.
2. NC = NO CONNECT.
Figure 4. 16-Lead LFCSP Pin Configuration
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2001–2010 Analog Devices, Inc. All rights reserved.
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
0
–0.25
VCM = VS/2
–0.50
–0.75
–1.00
VS = 16V
VS = 4.5V
–1.25
–1.50
–40 25 85
TEMPERATURE (°C)
Figure 5. Input Offset Voltage vs. Temperature
10
4.5V ≤ VS ≤ 16V
TA = 25°C
1
0.1
10
100 1k
FREQUENCY (Hz)
Figure 6. Current Noise
VS = 16V
RL = 10kΩ
CL = 100pF
AV = +1
TA = 25°C
10k
FREQUENCY (1µs/DIV)
Figure 7. Small Signal Transient Response
AD8565/AD8566/AD8567
1000
4.5V ≤ VS ≤ 16V
TA = 25°C
100
10
1
10 100 1k
FREQUENCY (Hz)
Figure 8. Voltage Noise Density vs. Frequency
1.0
VO = VS/2
AV = +1
0.8 TA = 25°C
10k
0.6
0.4
0.2
0
0 2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
Figure 9. Supply Current/Amplifier vs. Supply Voltage
0.80
0.75
VCM = VS/2
0.70
VS = 16V
0.65
0.60
0.55
VS = 4.5V
0.50
–40
25
TEMPERATURE (°C)
85
Figure 10. Supply Current/Amplifier vs. Temperature
Rev. G | Page 5 of 16
5 Page 
TOTAL HARMONIC DISTORTION + NOISE (THD + N)
The AD8565/AD8566/AD8567 feature low total harmonic dis-
tortion. Figure 31 shows THD + N vs. frequency. The THD + N
over the entire supply range is below 0.008%. When the device
is powered from a 16 V supply, the THD + N stays below
0.003%. Figure 31 shows the AD8566 in a unity noninverting
configuration.
10
1
0.1
VS = ±2.5V
VS = ±8V
0.01
20
100 1k
FREQUENCY (Hz)
Figure 31. THD + N vs. Frequency
10k
30k
SHORT-CIRCUIT OUTPUT CONDITIONS
The AD8565/AD8566/AD8567 do not have internal short-
circuit protection circuitry. As a precautionary measure, it is
recommended not to short the output directly to the positive
power supply or to ground.
It is not recommended to operate the AD8565/AD8566/AD8567
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
RX
≥
VS
35 mA
For a 5 V single-supply operation, RX should have a minimum
value of 143 Ω.
AD8565/AD8566/AD8567
LCD PANEL APPLICATIONS
The AD8565/AD8566/AD8567 amplifier is designed for LCD
panel applications or applications where large capacitive load
drive is required. It can instantaneously source/sink greater than
250 mA of current. At unity gain, it can drive 1 µF without
compensation. This makes the AD8565/AD8566/AD8567 ideal
for LCD VCOM driver applications.
To evaluate the performance of the AD8565/AD8566/AD8567,
a test circuit was developed to simulate the VCOM driver
application for an LCD panel. Figure 32 shows the test circuit.
Series capacitors and resistors connected to the output of the op
amp represent the load of the LCD panel. The 300 Ωand 3 kΩ
feedback resistors are used to improve settling time. This test
circuit simulates the worst-case scenario for a VCOM. It drives a
represented load that is connected to a signal switched symmet-
rically around VCOM.
Figure 33 shows a scope photo of the instantaneous output peak
current capability of the AD8565/AD8566/AD8567.
300Ω
8V 3kΩ
INPUT 0V TO 8V
SQUARE WAVE WITH
15.6µs PULSE WIDTH
10Ω 10Ω 10Ω 10Ω
4V
MEASURE
CURRENT
10nF 10nF
10nF
10nF
10Ω TO 20Ω
Figure 32. VCOM Test Circuit with Supply Voltage at 16 V
100
90
CH 2 = 100mA/DIV
CH 1 = 5V/DIV
10
0%
TIME (2µs/DIV)
Figure 33. Scope Photo of the VCOM Instantaneous Peak Current
Rev. G | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD8565.PDF ] | |
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