AD AD8565 16 v rail-to-rail operational amplifier Datasheet

16 V Rail-to-Rail
Operational Amplifiers
AD8565/AD8566/AD8567
AD8566
01909-001
8 V+
–IN A 2
7 OUT B
+IN A 3
6 –IN B
V– 4
5 +IN B
TOP VIEW
(Not to Scale)
01909-002
OUT A 1
Figure 2. 8-Lead MSOP Pin Configuration
OUT A
1
14 OUT D
–IN A 2
+IN A
13 –IN D
3
12 +IN D
AD8567
TOP VIEW
(Not to Scale)
11 V–
+IN B 5
–IN B
10 +IN C
9 –IN C
6
OUT B 7
8 OUT C
01909-003
V+ 4
Figure 3. 14-Lead TSSOP Pin Configuration
16
15
14
13
12
–IN D
11
+IN D
–IN A
1
+IN A
2
V+
3
TOP VIEW
(Not to Scale) 10
+IN B
4
9
AD8567
5
6
7
8
V–
+IN C
NOTES
1. THE EXPOSED PAD MUST BE
CONNECTED TO PIN 3, THAT IS, V+.
2. NC = NO CONNECT.
01909-004
The AD8566WARMZ is the automotive grade version.
4 –IN
Figure 1. 5-Lead SC70 Pin Configuration
NC
The AD8565/AD8566/AD8567 are specified over the −40°C to
+85°C temperature range. The AD8565 single is available in a 5lead 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.
TOP VIEW
(Not to Scale)
OUT D
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.
+IN 3
–IN C
The AD8565/AD8566/AD8567 are low cost, single-supply, railto-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.
V+ 2
OUT A
GENERAL DESCRIPTION
5 V–
OUT C
LCD reference drivers
Portable electronics
Communications equipment
Automotive infotainment systems
AD8565
OUT 1
NC
APPLICATIONS
PIN CONFIGURATIONS
–IN B
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
OUT B
FEATURES
Figure 4. 16-Lead LFCSP Pin Configuration
Rev. G
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Fax: 781.461.3113 ©2001–2010 Analog Devices, Inc. All rights reserved.
AD8565/AD8566/AD8567
TABLE OF CONTENTS
Features .............................................................................................. 1
Theory of Operation .........................................................................9
Applications ....................................................................................... 1
Input Overvoltage Protection ......................................................9
General Description ......................................................................... 1
Output Phase Reversal ............................................................... 10
Pin Configurations ........................................................................... 1
Power Dissipation....................................................................... 10
Revision History ............................................................................... 2
Thermal Pad—AD8567 ............................................................. 10
Specifications..................................................................................... 3
Total Harmonic Distortion + Noise (THD + N)........................ 11
Electrical Characteristics ............................................................. 3
Short-Circuit Output Conditions............................................. 11
Absolute Maximum Ratings............................................................ 4
LCD Panel Applications ............................................................ 11
Thermal Resistance ...................................................................... 4
Outline Dimensions ....................................................................... 12
ESD Caution .................................................................................. 4
Ordering Guide .......................................................................... 13
Typical Performance Characteristics ............................................. 5
REVISION HISTORY
3/10—Rev. F to Rev. G
Changes to Figure 4 .......................................................................... 1
Changes to the Thermal Pad—AD8567 Section ........................ 10
Changes to Figure 6 and Figure 8 ....................................................5
Added the Thermal Pad—AD8567 Section ................................ 10
Changes to Ordering Guide .......................................................... 13
1/10—Rev. E to Rev. F
Changes to Applications and General Description Sections ...... 1
Changes to Figure 4 .......................................................................... 1
Added Exposed Pad Notation to Outline Dimensions ............. 12
Changes to Ordering Guide .......................................................... 13
3/04—Rev. B to Rev. C
Changes to Specifications .................................................................2
Changes to TPC 4 ..............................................................................4
Changes to TPC 10 ............................................................................5
Changes to TPC 14 ............................................................................6
Changes to TPC 20 ............................................................................7
8/07—Rev. D to Rev. E
Changes to Features Section............................................................ 1
Changes to Phase Margin ................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Figure 30 ...................................................................... 10
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 13
12/03—Rev. A to Rev. B
Updated Ordering Guide .................................................................3
Updated Outline Dimensions ....................................................... 11
10/01—Rev. 0 to Rev. A
Edit to 16-Lead CSP and 5-Lead SC70 Pin Configuration ..........1
Edit to Ordering Guide .....................................................................3
7/01—Revision 0: Initial Version
2/06—Rev. C to Rev. D
Updated Format .................................................................. Universal
Rev. G | Page 2 of 16
AD8565/AD8566/AD8567
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
4.5 V ≤ VS ≤ 16 V, VCM = VS/2, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Symbol
Conditions
VOS
ΔVOS/ΔT
IB
−40°C ≤ TA ≤ +85°C
Min
Typ
Max
Unit
2
5
80
10
mV
µV/°C
nA
nA
nA
nA
V
dB
V/mV
kΩ
pF
−40°C ≤ TA ≤ +85°C
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Input Impedance
Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Continuous Output Current
Peak Output Current
POWER SUPPLY
Supply Voltage
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
IOS
CMRR
AVO
ZIN
CIN
VOH
VOL
IOUT
IPK
VS
PSRR
ISY
1
−40°C ≤ TA ≤ +85°C
Common-mode input
VCM = 0 V to VS, −40°C ≤ TA ≤ +85°C
RL = 10 kΩ, VO = 0.5 V to (VS − 0.5 V)
IL = 100 µA
VS = 16 V, IL = 5 mA
−40°C ≤ TA ≤ +85°C
VS = 4.5 V, IL = 5 mA
−40°C ≤ TA ≤ +85°C
IL = 100 µA
VS = 16 V, IL = 5 mA
−40°C ≤ TA ≤ +85°C
VS = 4.5 V, IL = 5 mA
−40°C ≤ TA ≤ +85°C
−0.5
54
3
15.85
15.75
4.2
4.1
600
800
80
130
VS + 0.5
95
10
400
1
VS − 0.005
15.95
4.38
5
42
95
150
250
300
400
35
250
VS = 16 V
VS = 4 V to 17 V, −40°C ≤ TA ≤ +85°C
VO = VS/2, no load
−40°C ≤ TA ≤ +85°C
SR
GBP
Øm
RL = 10 kΩ, CL = 200 pF
RL = 10 kΩ, CL = 10 pF
RL = 10 kΩ, CL = 10 pF
en
en
in
f = 1 kHz
f = 10 kHz
f = 10 kHz
Rev. G | Page 3 of 16
4.5
70
4
16
90
700
850
1
V
V
V
V
V
mV
mV
mV
mV
mV
mA
mA
V
dB
µA
mA
6
5
65
75
V/µs
MHz
Degrees
dB
26
25
0.8
nV/√Hz
nV/√Hz
pA/√Hz
AD8565/AD8566/AD8567
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 2.
Parameter
Supply Voltage (VS)
Input Voltage
Differential Input Voltage
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
18 V
−0.5 V to VS + 0.5 V
VS
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
θJA is specified for worst-case conditions, that is, for a device
soldered onto a circuit board for surface-mount packages.
Table 3. Thermal Resistance
Package Type
5-Lead SC70 (KS-5)
8-Lead MSOP (RM-8)
14-Lead TSSOP (RU-14)
16-Lead LFCSP (CP-16-4)
1
DAP is soldered down to PCB.
ESD CAUTION
Rev. G | Page 4 of 16
θJA
376
210
180
381
θJC
126
45
35
301
Unit
°C/W
°C/W
°C/W
°C/W
AD8565/AD8566/AD8567
TYPICAL PERFORMANCE CHARACTERISTICS
1000
4.5V ≤ VS ≤ 16V
TA = 25°C
VOLTAGE NOISE DENSITY (nV/√Hz)
–0.25
–0.50
VS = 16V
–0.75
VS = 4.5V
–1.00
–1.50
25
TEMPERATURE (°C)
–40
85
10
1
10
01909-005
–1.25
100
1k
10k
FREQUENCY (Hz)
Figure 8. Voltage Noise Density vs. Frequency
Figure 5. Input Offset Voltage vs. Temperature
1.0
SUPPLY CURRENT/AMPLIFIER (mA)
4.5V ≤ VS ≤ 16V
TA = 25°C
0.1
10
100
1k
FREQUENCY (Hz)
10k
0.8
0.6
0.4
0.2
0
01909-006
1
VO = VS/2
AV = +1
TA = 25°C
0
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
14
16
18
01909-009
10
CURRENT NOISE DENSITY (pA/√Hz)
100
Figure 9. Supply Current/Amplifier vs. Supply Voltage
Figure 6. Current Noise
0.80
VS = 16V
RL = 10kΩ
CL = 100pF
AV = +1
TA = 25°C
FREQUENCY (1µs/DIV)
01909-007
TIME (50mV/DIV)
SUPPLY CURRENT/AMPLIFIER (mA)
VCM = VS/2
0.75
VS = 16V
0.70
0.65
0.60
VS = 4.5V
0.55
0.50
–40
25
TEMPERATURE (°C)
85
Figure 10. Supply Current/Amplifier vs. Temperature
Figure 7. Small Signal Transient Response
Rev. G | Page 5 of 16
01909-010
INPUT OFFSET VOLTAGE (mV)
VCM = VS/2
01909-008
0
AD8565/AD8566/AD8567
VS = 16V
VIN = 100mV p-p
RL = 10kΩ
AV = +1
TA = 25°C
80
OVERSHOOT (%)
70
VS = 16V
RL = 10kΩ
CL = 40pF
TA = 25°C
100
80
GAIN (dB)
90
60
–OS
50
40
0
60
45
40
90
20
135
0
180
+OS
225
30
PHASE SHIFT (Degrees)
100
270
20
100
LOAD CAPACITANCE (pF)
1k
1k
10k
100k
1M
10M
01909-014
0
10
01909-011
10
100M
FREQUENCY (Hz)
Figure 11. Small Signal Overshoot vs. Load Capacitance
Figure 14. Open-Loop Gain and Phase Shift vs. Frequency
18
1k
TA = 25°C
16
10
8
6
VS = 16V
AV = +1
RL = 10kΩ
DISTORTION < 1%
TA = 25°C
4
2
0
10
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
100
0.1
1
10
100
150
ISINK = 5mA
135
OUTPUT VOLTAGE (mV)
120
40
30
20
0.01
Figure 15. Output Voltage to Supply Rail vs. Load Current
AVCL = –10
10
AVCL = +1
0
VS = 4.5V
105
90
75
60
VS = 16V
45
30
10
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
0
–40
25
85
TEMPERATURE (°C)
Figure 16. Output Voltage Swing to Rail vs. Temperature
Figure 13. Closed-Loop Gain vs. Frequency
Rev. G | Page 6 of 16
01909-016
15
01909-013
CLOSED-LOOP GAIN (dB)
AVCL = –100
1
LOAD CURRENT (mA)
4.5V ≤ VS ≤ 16V
RL = 10kΩ
CL = 40pF
TA = 25°C
50
VS = 16V
10
0.1
0.001
Figure 12. Closed-Loop Output Swing vs. Frequency
60
VS = 4.5V
01909-015
OUTPUT VOLTAGE (mV)
12
01909-012
OUTPUT SWING (V p-p)
14
AD8565/AD8566/AD8567
150
160
ISOURCE = 5mA
105
90
75
VS = 16V
60
45
30
15
–40
25
85
TEMPERATURE (°C)
120
100
80
60
+PSRR
40
–PSRR
20
0
–20
–40
100
01909-017
0
VS = 16V
TA = 25°C
140
1k
10k
100k
1M
Figure 17. Output Voltage Swing to Rail vs. Temperature
Figure 20. Power Supply Rejection Ratio vs. Frequency
500
VS = 16V
RL = 10kΩ
AV = +1
TA = 25°C
AV = +1
TA = 25°C
450
400
VOLTAGE (3V/DIV)
350
IMPEDANCE (Ω)
10M
FREQUENCY (Hz)
01909-020
VS = 4.5V
120
OUTPUT VOLTAGE (mV)
POWER SUPPLY REJECTION RATIO (dB)
135
VS = 4.5V
300
250
200
150
100
50
10k
100k
1M
10M
FREQUENCY (Hz)
01909-021
1k
01909-018
VS = 16V
0
100
TIME (40µs/DIV)
Figure 18. Closed-Loop Output Impedance vs. Frequency
Figure 21. No Phase Reversal
1.8k
140
VS = 16V
TA = 25°C
1.6k
VS = 16V
TA = 25°C
120
1.4k
QUANTITY (Amplifiers)
80
60
40
20
0
1.2k
1.0k
800
600
400
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
0
–10
–8
–6
–4
–2
0
2
4
6
INPUT OFFSET VOLTAGE (mV)
Figure 19. Common-Mode Rejection Ratio (CMRR) vs. Frequency
Figure 22. Input Offset Voltage Distribution
Rev. G | Page 7 of 16
8
10
01909-022
200
01909-019
CMRR (dB)
100
AD8565/AD8566/AD8567
7
5
6
3
2
1
BANDWIDTH (MHz)
VS = 4.5V
0
VS = 16V
–1
–2
5
4
3
2
1
–4
–40
25
0
01909-023
–5
85
TEMPERATURE (°C)
0
Figure 23. Input Offset Current vs. Temperature
2
4
6
8
10
12
COMMON-MODE VOLTAGE (V)
6
VS = 5V
AV = +1
RL = 10kΩ
TA = 25°C
VCM = VS/2
–50
5
VS = 16V
–100
BANDWIDTH (MHz)
INPUT BIAS CURRENT (nA)
16
Figure 26. Frequency vs. Common-Mode Voltage (VS = 16 V)
0
–150
VS = 4.5V
–200
4
3
2
–250
1
–300
–40
25
0
01909-024
–350
85
TEMPERATURE (°C)
0
Figure 24. Input Bias Current vs. Temperature
–40
–60
–80
4.5V
–100
–120
16V
–140
–180
100
1k
FREQUENCY (Hz)
10k
60k
01909-025
–160
50
1
2
3
COMMON-MODE VOLTAGE (V)
4
5
Figure 27. Frequency vs. Common-Mode Voltage (VS = 5 V)
–20
CROSSTALK (dB)
14
01909-026
VS = 16V
AV = +1
RL = x
TA = 25°C
–3
Figure 25. Channel A vs. Channel B Crosstalk
Rev. G | Page 8 of 16
01909-027
INPUT OFFSET CURRENT (nA)
4
AD8565/AD8566/AD8567
THEORY OF OPERATION
Operation of the input stage is best understood as a function of
applied common-mode voltage: when the inputs of the AD8565/
AD8566/AD8567 are biased midway between the supplies, the
differential signal path gain is controlled by resistive loads Q4 to
Q5 (via R9, R10). As the input common-mode level is reduced
toward the negative supply (VNEG or GND), the input transistor
current sources, I1 and I2, are forced into saturation, thereby
forcing the Q6 to D3 and Q8 to D4 networks into cutoff.
However, Q4 to Q5 remain active, providing input stage gain.
Inversely, when common-mode input voltage is increased
toward the positive supply, Q4 to Q5 are driven into cutoff, Q3
is driven into saturation, and Q4 becomes active, providing bias
to the Q10 to Q11 differential pair. The point at which the Q10 to
Q11 differential pair becomes active is approximately equal to
(VPOS − 1 V).
VPOS
R1
Q3
BIAS LINE
Q4
D1
D2
R3
R4
Q6
R5
D3
R6
C2
Q10
D4
Q11
D5
I1
I2
D6
600
200
0
–200
–400
–600
–800
–1000
0
2
4
6
8
10
12
INPUT COMMON-MODE VOLTAGE (V)
14
16
Figure 29. AD8565/AD8566/AD8567 Input Bias Current vs.
Common-Mode Voltage
To achieve rail-to-rail output performance, the AD8565/
AD8566/AD8567 design uses a complementary commonsource (or gmRL) output. This con-figuration allows output
voltages to approach the power supply rails, particularly if the
output transistors are allowed to enter the triode region on
extremes of signal swing, which are limited by VGS, the
transistor sizes, and output load current. In addition, this type
of output stage exhibits voltage gain in an open-loop gain
configuration. The amount of gain depends on the total load
resistance at the output of the AD8565/AD8566/AD8567.
FOLDED
CASCADE
R10
VNEG
01909-028
R9
400
As with any semiconductor device, whenever the input exceeds
either supply voltages, 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 positive-negative (pn)
junctions allow current to flow from the input to the supplies.
V–
Q5
Q4
VS = 16V
TA = 25°C
800
INPUT OVERVOLTAGE PROTECTION
Q8
C1
V+
1000
01909-029
Figure 28 shows a simplified equivalent circuit for the AD8565/
AD8566/AD8567. The rail-to-rail bipolar input stage is composed of two PNP differential pairs, Q4 to Q5 and Q10 to Q11,
operating in series with diode protection networks, D1 to D2.
Diode network D1 to D2 serves as protection against large
transients for Q4 to Q5 to accommodate rail-to-rail input swing.
D5 to D6 protect Q10 to Q11 against Zenering. In normal operation, Q10 to Q11 are off, and their input stage is buffered from
the operational amplifier inputs by Q6 to D3 and Q8 to D4.
The benefit of this type of input stage is low bias current. The
input bias current is the sum of base currents of Q4 to Q5 and
Q6 to Q8 over the range from (VNEG + 1 V) to (VPOS − 1 V).
Outside this range, the input bias current is dominated by the
sum of base currents of Q10 to Q11 for input signals close to
VNEG and of Q6 to Q8 (Q10 to Q11) for signals close to VPOS.
From this type of design, the input bias current of the AD8565/
AD8566/AD8567 not only exhibits different amplitude but also
exhibits different polarities. Figure 29 provides the characteristics of the input bias current vs. the common-mode voltage. It is
important to keep in mind that the source impedances driving
the inputs are balanced for optimum dc and ac performance.
INPUT BIAS CURRENT (nA)
The AD8565/AD8566/AD8567 are designed to drive large
capacitive loads in LCD applications. They have high output
current drive and rail-to-rail input/output operation and are
powered from a single 16 V supply. They are also intended for
other applications where low distortion and high output current
drive are needed.
Figure 28. AD8565/AD8566/AD8567 Equivalent Input Circuit
Rev. G | Page 9 of 16
AD8565/AD8566/AD8567
The AD8565/AD8566/AD8567 are immune to phase reversal.
Although device output does not change phase, large currents
due to input overvoltage could damage the device. In applications where the possibility of an input voltage exceeding the
supply voltage exists, overvoltage protection should be used as
described in the Input Overvoltage Protection section.
POWER DISSIPATION
The maximum allowable internal junction temperature of
150°C limits the maximum power dissipation of AD8565/
AD8566/AD8567 devices. As the ambient temperature
increases, the maximum power dissipated by AD8565/AD8566/
AD8567 devices must decrease linearly to maintain maximum
junction temperature. If this maximum junction temperature is
exceeded momentarily, the device still operates properly once
the junction temperature is reduced below 150°C. If the
maximum junction temperature is exceeded for an extended
period, overheating could lead to permanent damage of the
device.
The maximum safe junction temperature, TJMAX, is 150°C. Using
the following formula, the maximum power that an AD8565/
AD8566/AD8567 device can safely dissipate as a function of
temperature can be obtained:
PDISS = TJMAX − TA/θJA
where:
PDISS is the AD8565/AD8566/AD8567 power dissipation.
TJMAX is the AD8565/AD8566/AD8567 maximum allowable
junction temperature (150°C).
TA is the ambient temperature of the circuit.
θJA is the AD8565/AD8566/AD8567 package thermal resistance,
junction-to-ambient.
PDISS = (VS − VOUT) × ILOAD
where:
VS is the supply voltage.
VOUT is the output voltage.
ILOAD is the output load current.
Figure 30 shows the maximum power dissipation vs. temperature. To achieve proper operation, use the previous equation to
calculate PDISS for a specific package at any given temperature or
use Figure 30.
1.25
16-LEAD LFCSP
1.00
0.75
14-LEAD TSSOP
8-LEAD MSOP
0.50
5-LEAD SC70
0.25
0
–35
–15
5
25
45
AMBIENT TEMPERATURE (°C)
65
85
01909-030
OUTPUT PHASE REVERSAL
The power dissipated by the device can be calculated as
MAXIMUM POWER DISSIPATION (W)
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 AD8565/AD8566/AD8567 where the input exceeds the
supply more than 0.6 V, an external series resistor should be
added. The size of the resistor can be calculated by using the
maximum over-voltage divided by 5 mA. This resistance should
be placed in series with either input exposed to an overvoltage.
Figure 30. Maximum Power Dissipation vs. Temperature for 5-Lead SC70,
8-Lead MSOP, 14-Lead TSSOP, and 16-Lead LFCSP Packages
THERMAL PAD—AD8567
The AD8567 LFCSP comes with a thermal pad that is attached
to the substrate. This substrate is connected to the most positive
supply, that is, Pin 3 in the LFCSP package and Pin 4 in the
TSSOP package. To be electrically safe, the thermal pad should
be soldered to an area on the board that is electrically isolated
or connected to VDD. Attaching the thermal pad to ground
adversely affects the performance of the part.
Soldering down this thermal pad dramatically improves the
heat dissipation of the package. It is necessary to attach vias that
connect the soldered thermal pad to another layer on the board.
This provides an avenue to dissipate the heat away from the
part. Without vias, the heat is isolated directly under the part.
Rev. G | Page 10 of 16
AD8565/AD8566/AD8567
TOTAL HARMONIC DISTORTION + NOISE (THD + N)
LCD PANEL APPLICATIONS
The AD8565/AD8566/AD8567 feature low total harmonic distortion. 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.
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 Ω
and 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 symmetrically around VCOM.
10
THD+N (%)
1
VS = ±2.5V
Figure 33 shows a scope photo of the instantaneous output peak
current capability of the AD8565/AD8566/AD8567.
100
1k
FREQUENCY (Hz)
10k
30k
300Ω
INPUT 0V TO 8V
SQUARE WAVE WITH
15.6µs PULSE WIDTH
Figure 31. THD + N vs. Frequency
8V
SHORT-CIRCUIT OUTPUT CONDITIONS
10Ω
The AD8565/AD8566/AD8567 do not have internal shortcircuit 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
VS
RX ≥
35 mA
3kΩ
10Ω
10Ω
10Ω
4V
MEASURE
CURRENT
10nF
10nF
10nF
10nF
10Ω TO 20Ω
01909-032
0.01
20
01909-031
VS = ±8V
Figure 32. VCOM Test Circuit with Supply Voltage at 16 V
100
90
CH 2 = 100mA/DIV
For a 5 V single-supply operation, RX should have a minimum
value of 143 Ω.
CH 1 = 5V/DIV
10
0%
TIME (2µs/DIV)
01909-033
0.1
Figure 33. Scope Photo of the VCOM Instantaneous Peak Current
Rev. G | Page 11 of 16
AD8565/AD8566/AD8567
OUTLINE DIMENSIONS
3.20
3.00
2.80
8
3.20
3.00
2.80
1
5
2.20
2.00
1.80
5.15
4.90
4.65
4
1.35
1.25
1.15
PIN 1
IDENTIFIER
5
1
4
2
3
2.40
2.10
1.80
0.65 BSC
0.65 BSC
1.00
0.90
0.70
1.10 MAX
0.40
0.25
0.80
0.55
0.40
0.23
0.09
6°
0°
0.10 MAX
COPLANARITY
0.10
100709-B
0.15
0.05
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
1.10
0.80
SEATING
PLANE
0.30
0.15
8
4.50
4.40
4.30
6.40
BSC
7
PIN 1
0.65 BSC
1.05
1.00
0.80
1.20
MAX
0.15
0.05
COPLANARITY
0.10
0.30
0.19
0.46
0.36
0.26
COMPLIANT TO JEDEC STANDARDS MO-203-AA
5.10
5.00
4.90
1
0.22
0.08
Figure 35. 5-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-5)
Dimensions shown in millimeters
Figure 34. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
14
0.40
0.10
0.20
0.09
SEATING
PLANE
8°
0°
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
Figure 36. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
Rev. G | Page 12 of 16
0.75
0.60
0.45
072809-A
15° MAX
061908-A
0.95
0.85
0.75
AD8565/AD8566/AD8567
4.00
BSC SQ
0.60 MAX
0.60 MAX
12° MAX
1.00
0.85
0.80
0.65 BSC
TOP
VIEW
3.75
BSC SQ
0.75
0.60
0.50
0.80 MAX
0.65 TYP
SEATING
PLANE
PIN 1
INDICATOR
1
2.25
2.10 SQ
1.95
9
8
5
4
0.25 MIN
1.95 BSC
0.05 MAX
0.02 NOM
0.35
0.30
0.25
16
13
12
0.20 REF
COPLANARITY
0.08
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
COMPLIANT TO JEDEC STANDARDS MO-220-VGGC
072808-A
PIN 1
INDICATOR
(BOTTOM VIEW)
Figure 37. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ]
4 mm × 4 mm Body, Very Thin Quad
(CP-16-4)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
AD8565AKSZ-REEL7
AD8566ARM-R2
AD8566ARM-REEL
AD8566ARMZ-R2
AD8566ARMZ-REEL
AD8566WARMZ-REEL2
AD8567ARU
AD8567ARU-REEL
AD8567ARUZ
AD8567ARUZ-REEL
AD8567ACP-R2
AD8567ACP-REEL7
AD8567ACPZ-R2
AD8567ACPZ-REEL
AD8567ACPZ-REEL7
1
2
Abs Max (V)
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
Temperature
Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Package Description
5-Lead Thin Shrink Small Outline Transistor Package (SC70)
8-Lead Mini Small Outline Package (MSOP)
8-Lead Mini Small Outline Package (MSOP)
8-Lead Mini Small Outline Package (MSOP)
8-Lead Mini Small Outline Package (MSOP)
8-Lead Mini Small Outline Package (MSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
Z = RoHS Compliant Part.
Qualified for automotive applications.
Rev. G | Page 13 of 16
Package
Option
KS-5
RM-8
RM-8
RM-8
RM-8
RM-8
RU-14
RU-14
RU-14
RU-14
CP-16-4
CP-16-4
CP-16-4
CP-16-4
CP-16-4
Branding
A0N
ATA
ATA
ATA#
ATA#
LG3
AD8565/AD8566/AD8567
NOTES
Rev. G | Page 14 of 16
AD8565/AD8566/AD8567
NOTES
Rev. G | Page 15 of 16
AD8565/AD8566/AD8567
NOTES
©2001–2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D01909-0-3/10(G)
Rev. G | Page 16 of 16