AD8644 Datasheet PDF - Analog Devices
| Part Number | AD8644 | |
| Description | Single and Quad +18 V Operational Amplifiers | |
| Manufacturers | Analog Devices | |
| Logo |  |
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FEATURES
Unity-gain bandwidth: 5.5 MHz
Low voltage offset: 1.0 mV
Slew rate: 7.5 V/μs
Single-supply operation: 5 V to 18 V
High output current: 70 mA
Low supply current: 800 μA/amplifier
Stable with large capacitive loads
Rail-to-rail inputs and outputs
APPLICATIONS
LCD gamma and VCOM drivers
Modems
Portable instrumentation
Direct access arrangement
GENERAL DESCRIPTION
The AD8614 (single) and AD8644 (quad) are single-supply,
5.5 MHz bandwidth, rail-to-rail amplifiers optimized for LCD
monitor applications.
They are processed using the Analog Devices, Inc. high voltage,
extra fast complementary bipolar (HV XFCB) process. This
proprietary process includes trench-isolated transistors that
lower internal parasitic capacitance, which improves gain
bandwidth, phase margin, and capacitive load drive. The low
supply current of 800 μA (typical) per amplifier is critical for
portable or densely packed designs. In addition, the rail-to-rail
output swing provides greater dynamic range and control than
standard video amplifiers provide.
These products operate from supplies of 5 V to as high as 18 V.
The unique combination of an output drive of 70 mA, high
slew rates, and high capacitive drive capability makes the
AD8614/AD8644 an ideal choice for LCD applications.
The AD8614 and AD8644 are specified over the temperature
range of –20°C to +85°C. They are available in 5-lead SOT-23,
14-lead TSSOP, and 14-lead SOIC surface-mount packages in
tape and reel.
Single and Quad 18 V
Operational Amplifiers
AD8614/AD8644
PIN CONFIGURATIONS
OUT A 1
V– 2
+IN 3
AD8614
TOP VIEW
(Not to Scale)
5 V+
4 –IN
Figure 1. 5-Lead SOT-23
(RJ-5)
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
14 OUT D
AD8644
TOP VIEW
(Not to Scale)
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
Figure 2. 14-Lead TSSOP
(RU-14)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 AD8644 12 +IN D
V+
4
TOP VIEW
(Not to Scale)
11 V–
+IN B 5
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 3. 14-Lead Narrow Body SOIC
(R-14)
Rev. B
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 ©1999–2007 Analog Devices, Inc. All rights reserved.
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TYPICAL PERFORMANCE CHARACTERISTICS
50
VS = 18V
45 RL = 2kΩ
TA = 25°C
40
35
30
25
20
15
+OS
10
–OS
5
0
10 100 1k
CAPACITANCE (pF)
Figure 4. Small Signal Overshoot vs. Load Capacitance
10k
12
8
0.1%
4
0.01%
0
–4
0.1%
0.01%
–8
–12
0
0.5 1.0 1.5 2.0 2.5 3.0
SETTLING TIME (µs)
Figure 5. Output Swing vs. Settling Time
3.5
80
60
40
5V ≤ VS ≤ 18V
20 RL = 1MΩ
CL = 40pF
0 TA = 25°C
45
90
135
180
1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 6. Open-Loop Gain and Phase Shift vs. Frequency
AD8614/AD8644
7.5
VS = 5V
6.5 RL = 2kΩ
CL = 200pF
5.5 AV = 1
TA = 25°C
4.5
3.5
2.5
1.5
0.5
–0.5
–1.5
–2.5
TIME (1µs/DIV)
Figure 7. Large Signal Transient Response, VS = 5 V
29
VS = 18V
25 RL = 2kΩ
CL = 200pF
21 AV = 1
TA = 25°C
17
13
9
5
1
–3
–7
–11
TIME (1µs/DIV)
Figure 8. Large Signal Transient Response, VS = 18 V
VS
2
VS = 5V ≤ VS ≤ 18V
RL = 2kΩ
CL = 200pF
AV = 1
TA = 25°C
TIME (500ns/DIV)
Figure 9. Small Signal Transient Response
Rev. B | Page 5 of 16
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AD8644 electronic component. |
| Information | Total 16 Pages | |
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| Download | [ AD8644.PDF Datasheet ] | |
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