AD AD8534 Low cost, 250 ma output, single-supply amplifier Datasheet

Low Cost, 250 mA Output,
Single-Supply Amplifiers
AD8531/AD8532/AD8534
PIN CONFIGURATIONS
OUT A 1
Multimedia audio
LCD drivers
ASIC input or output amplifiers
Headphone drivers
5
V+
4
–IN A
V– 2
+IN A 3
Figure 1. 5-Lead SC70 and 5-Lead SOT-23
(KS and RJ Suffixes)
NC 1
APPLICATIONS
AD8531
01099-001
Single-supply operation: 2.7 V to 6 V
High output current: ±250 mA
Low supply current: 750 μA/amplifier
Wide bandwidth: 3 MHz
Slew rate: 5 V/μs
No phase reversal
Low input currents
Unity gain stable
Rail-to-rail input and output
AD8531
8
NC
–IN A 2
7
V+
+IN A 3
6
OUT A
V– 4
5
NC
NC = NO CONNECT
01099-002
FEATURES
Figure 2. 8-Lead SOIC
(R Suffix)
The very low input bias currents enable the AD853x to be used for
integrators, diode amplification, and other applications requiring
low input bias current. Supply current is only 750 μA per
amplifier at 5 V, allowing low current applications to control
high current loads.
Applications include audio amplification for computers, sound
ports, sound cards, and set-top boxes. The AD853x family is
very stable, and it is capable of driving heavy capacitive loads
such as those found in LCDs.
The ability to swing rail-to-rail at the inputs and outputs enables
designers to buffer CMOS DACs, ASICs, or other wide output
swing devices in single-supply systems.
OUT A 1
8
V+
–IN A
2
7
OUT B
+IN A
3
6
–IN B
V–
4
5
+IN B
AD8532
Figure 3. 8-Lead SOIC, 8-Lead TSSOP, and 8-Lead MSOP
(R, RU, and RM Suffixes)
14 OUT D
OUT A 1
–IN A
13 –IN D
2
+IN A
3
V+
4
+IN B 5
12 +IN D
AD8534
11 V–
10 +IN C
–IN B
6
9
–IN C
OUT B
7
8
OUT C
01099-004
The AD8531, AD8532, and AD8534 are single, dual, and quad
rail-to-rail input/output single-supply amplifiers featuring
250 mA output drive current. This high output current makes
these amplifiers excellent for driving either resistive or capacitive
loads. AC performance is very good with 3 MHz bandwidth,
5 V/μs slew rate, and low distortion. All are guaranteed to operate
from a 3 V single supply as well as a 5 V supply.
01099-003
GENERAL DESCRIPTION
Figure 4. 14-Lead SOIC and 14-Lead TSSOP
(R and RU Suffixes)
The AD8531/AD8532/AD8534 are specified over the extended
industrial temperature range (−40°C to +85°C). The AD8531 is
available in 8-lead SOIC, 5-lead SC70, and 5-lead SOT-23 packages.
The AD8532 is available in 8-lead SOIC, 8-lead MSOP, and 8-lead
TSSOP surface-mount packages. The AD8534 is available in
narrow 14-lead SOIC and 14-lead TSSOP surface-mount
packages.
Rev. F
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.
Trademarks and registered trademarks are the property of their respective owners.
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 ©1996–2008 Analog Devices, Inc. All rights reserved.
AD8531/AD8532/AD8534
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Calculating Power by Measuring Ambient and Case
Temperature ................................................................................ 12
General Description ......................................................................... 1
Calculating Power by Measuring Supply Current ................. 12
Pin Configurations ........................................................................... 1
Input Overvoltage Protection ................................................... 12
Revision History ............................................................................... 2
Output Phase Reversal............................................................... 13
Specifications..................................................................................... 3
Capacitive Load Drive ............................................................... 13
Electrical Characteristics............................................................. 3
Applications Information .............................................................. 14
Absolute Maximum Ratings............................................................ 5
High Output Current, Buffered Reference/Regulator........... 14
Thermal Resistance ...................................................................... 5
Single-Supply, Balanced Line Driver ....................................... 14
ESD Caution.................................................................................. 5
Single-Supply Headphone Amplifier....................................... 15
Typical Performance Characteristics ............................................. 6
Single-Supply, 2-Way Loudspeaker Crossover Network....... 15
Theory of Operation ...................................................................... 11
Direct Access Arrangement for Telephone Line Interface ... 16
Short-Circuit Protection............................................................ 11
Outline Dimensions ....................................................................... 17
Power Dissipation....................................................................... 11
Ordering Guide .......................................................................... 20
Power Calculations for Varying or Unknown Loads............. 12
REVISION HISTORY
1/08—Rev. E to Rev. F
Changes to Layout ............................................................................ 5
Changes to Figure 12 and Figure 13............................................... 7
Changes to Figure 38...................................................................... 11
Changes to Input Overvoltage Protection Section..................... 12
Changes to Figure 43...................................................................... 14
Updated Outline Dimensions ....................................................... 17
Changes to Ordering Guide .......................................................... 20
4/05—Rev. D to Rev. E
Updated Format..................................................................Universal
Changes to Pin Configurations....................................................... 1
Changes to Table 4............................................................................ 5
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide .......................................................... 19
10/02—Rev. C to Rev. D
Deleted 8-Lead PDIP (N-8) .............................................. Universal
Deleted 14-Lead PDIP (N-14) .......................................... Universal
Edits to Figure 34...............................................................................9
Updated Outline Dimensions ........................................................15
8/96—Revision 0: Initial Version
Rev. F | Page 2 of 20
AD8531/AD8532/AD8534
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 3.0 V, VCM = 1.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
Typ
VOS
−40°C ≤ TA ≤ +85°C
Input Bias Current
IB
5
−40°C ≤ TA ≤ +85°C
Input Offset Current
IOS
1
−40°C ≤ TA ≤ +85°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
Bias Current Drift
Offset Current Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
CMRR
AVO
ΔVOS/ΔT
ΔIB/ΔT
ΔIOS/ΔT
VCM = 0 V to 3 V
RL = 2 kΩ, VO = 0.5 V to 2.5 V
VOH
IL = 10 mA
−40°C ≤ TA ≤ +85°C
IL = 10 mA
−40°C ≤ TA ≤ +85°C
VOL
IOUT
ZOUT
2.85
2.8
VS = 3 V to 6 V
VO = 0 V
−40°C ≤ TA ≤ +85°C
SR
tS
GBP
фo
CS
RL = 2 kΩ
To 0.01%
en
Unit
25
30
50
60
25
30
3
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
fA/°C
fA/°C
45
25
20
50
20
2.92
60
100
125
±250
60
f = 1 MHz, AV = 1
PSRR
ISY
in
0
38
Max
45
55
0.70
1
1.25
V
V
mV
mV
mA
Ω
dB
mA
mA
f = 1 kHz, RL = 2 kΩ
3.5
1.6
2.2
70
65
V/μs
μs
MHz
Degrees
dB
f = 1 kHz
f = 10 kHz
f = 1 kHz
45
30
0.05
nV/√Hz
nV/√Hz
pA/√Hz
Rev. F | Page 3 of 20
AD8531/AD8532/AD8534
VS = 5.0 V, VCM = 2.5 V, TA = 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
Typ
VOS
−40°C ≤ TA ≤ +85°C
Input Bias Current
IB
5
−40°C ≤ TA ≤ +85°C
Input Offset Current
IOS
1
−40°C ≤ TA ≤ +85°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
Bias Current Drift
Offset Current Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Full-Power Bandwidth
Settling Time
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
CMRR
AVO
ΔVOS/ΔT
ΔIB/ΔT
ΔIOS/ΔT
VCM = 0 V to 5 V
RL = 2 kΩ, VO = 0.5 V to 4.5 V
−40°C ≤ TA ≤ +85°C
VOH
IL = 10 mA
−40°C ≤ TA ≤ +85°C
IL = 10 mA
−40°C ≤ TA ≤ +85°C
VOL
IOUT
ZOUT
4.9
4.85
VS = 3 V to 6 V
VO = 0 V
−40°C ≤ TA ≤ +85°C
SR
BWp
tS
GBP
фo
CS
RL = 2 kΩ
1% distortion
To 0.01%
en
Unit
25
30
50
60
25
30
5
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
fA/°C
fA/°C
47
80
20
50
20
4.94
50
100
125
±250
40
f = 1 MHz, AV = 1
PSRR
ISY
in
0
38
15
Max
45
55
0.75
1.25
1.75
V
V
mV
mV
mA
Ω
dB
mA
mA
f = 1 kHz, RL = 2 kΩ
5
350
1.4
3
70
65
V/μs
kHz
μs
MHz
Degrees
dB
f = 1 kHz
f = 10 kHz
f = 1 kHz
45
30
0.05
nV/√Hz
nV/√Hz
pA/√Hz
Rev. F | Page 4 of 20
AD8531/AD8532/AD8534
ABSOLUTE MAXIMUM RATINGS
Table 3.
–VOL
+VOH
2.0
1.5
1.0
For supplies less than 6 V, the differential input voltage is equal to ±VS.
0.5
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; the functional operation of the device at these or
any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
0
0
20
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 4.
θJA
376
230
158
210
240
120
240
θJC
126
146
43
45
43
36
43
40
60
80
100 120
RLOAD (Ω)
140
160
Figure 5. Output Voltage vs. Load, VS = ±2.5 V,
RLOAD Is Connected to GND (0 V)
ESD CAUTION
THERMAL RESISTANCE
Package Type
5-Lead SC70 (KS)
5-Lead SOT-23 (RJ)
8-Lead SOIC (R)
8-Lead MSOP (RM)
8-Lead TSSOP (RU)
14-Lead SOIC (R)
14-Lead TSSOP (RU)
01099-005
1
2.5
Rating
7V
GND to VS
±6 V
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
±VOUT
Parameter
Supply Voltage (VS)
Input Voltage
Differential Input Voltage1
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Rev. F | Page 5 of 20
180
200
AD8531/AD8532/AD8534
TYPICAL PERFORMANCE CHARACTERISTICS
VS = 2.7V
VCM = 1.35V
TA = 25°C
INPUT BIAS CURRENT (pA)
400
300
200
100
–10
–8
–6
–4
–2
0
INPUT OFFSET VOLTAGE (mV)
2
7
6
5
4
3
2
01099-006
–12
4
–35
Figure 6. Input Offset Voltage Distribution
5
25
45
TEMPERATURE (°C)
65
85
VS = 5V
TA = 25°C
8
INPUT BIAS CURRENT (pA)
QUANTITY (Amplifiers)
–15
Figure 9. Input Bias Current vs. Temperature
VS = 5V
VCM = 2.5V
TA = 25°C
500
VS = 5V, 3V
VCM = VS/2
01099-009
QUANTITY (Amplifiers)
500
8
400
300
200
6
5
4
3
2
–10
–8
–6
–4
–2
0
INPUT OFFSET VOLTAGE (mV)
2
4
0
Figure 7. Input Offset Voltage Distribution
INPUT OFFSET CURRENT (pA)
5
–4
–5
–6
–7
–8
–15
5
25
45
TEMPERATURE (°C)
65
VS = 5V, 3V
VCM = VS/2
4
3
2
1
0
–1
01099-008
INPUT OFFSET VOLTAGE (mV)
6
–3
–35
5
Figure 10. Input Bias Current vs. Common-Mode Voltage
VS = 5V
VCM = 2.5V
–2
1
2
3
4
COMMON-MODE VOLTAGE (V)
–2
85
Figure 8. Input Offset Voltage vs. Temperature
01099-011
–12
01099-010
01099-007
100
7
–35
–15
5
25
45
TEMPERATURE (°C)
65
Figure 11. Input Offset Current vs. Temperature
Rev. F | Page 6 of 20
85
AD8531/AD8532/AD8534
VS = 2.7V
TA = 25°C
100
VS = 5V
RL = NO LOAD
TA = 25°C
80
SOURCE
GAIN (dB)
SINK
10
1
60
45
40
90
20
135
0
180
0.01
0.1
1
LOAD CURRENT (mA)
10
01099-015
1k
100
5
VS = 5V
TA = 25°C
OUTPUT SWING (V p-p)
ΔOUTPUT VOLTAGE (mV)
SOURCE
SINK
1
3
2
01099-013
0.01
0.1
1
LOAD CURRENT (mA)
10
0
1k
100
10k
100k
FREQUENCY (Hz)
1M
10M
Figure 16. Closed-Loop Output Swing vs. Frequency
Figure 13. Output Voltage to Supply Rail vs. Load Current
5
VS = 2.7V
RL = NO LOAD
TA = 25°C
VS = 5V
TA = 25°C
RL = 2kΩ
VIN = 4.9V p-p
45
40
90
20
135
0
180
PHASE SHIFT (Degrees)
60
OUTPUT SWING (V p-p)
4
80
3
2
1k
10k
100k
1M
FREQUENCY (Hz)
10M
100M
Figure 14. Open-Loop Gain and Phase Shift vs. Frequency
0
1k
01099-017
1
01099-014
GAIN (dB)
100M
1
0.1
0.01
0.001
10M
VS = 2.7V
TA = 25°C
RL = 2kΩ
VIN = 2.5V p-p
4
100
10
100k
1M
FREQUENCY (Hz)
Figure 15. Open-Loop Gain and Phase Shift vs. Frequency
Figure 12. Output Voltage to Supply Rail vs. Load Current
1000
10k
01099-016
0.01
0.001
01099-012
0.1
10k
100k
FREQUENCY (Hz)
1M
Figure 17. Closed-Loop Output Swing vs. Frequency
Rev. F | Page 7 of 20
10M
PHASE SHIFT (Degrees)
ΔOUTPUT VOLTAGE (mV)
1000
AD8531/AD8532/AD8534
IMPEDANCE (Ω)
140
120
100
80
AV = 10
60
AV = 1
01099-018
40
20
0
1k
10k
100k
1M
LOAD CURRENT (mA)
10M
0.1
01099-021
160
VS = 5V
TA = 25°C
0.01
10
100M
100
Figure 18. Closed-Loop Output Impedance vs. Frequency
110
VS = 5V
AV = 1000
TA = 25°C
FREQUENCY = 1kHz
100µV/DIV
10
0%
90
80
70
60
01099-019
40
1k
Figure 19. Voltage Noise Density vs. Frequency (1 kHz)
10k
100k
FREQUENCY (Hz)
1M
10M
Figure 22. Common-Mode Rejection vs. Frequency
140
VS = 5V
AV = 1000
TA = 25°C
FREQUENCY = 10kHz
POWER SUPPLY REJECTION (dB)
120
200µV/DIV
90
VS = 5V
TA = 25°C
100
50
MARKER 41µV/√Hz
100
100k
01099-022
90
10k
Figure 21. Current Noise Density vs. Frequency
COMMON-MODE REJECTION (dB)
100
1k
FREQUENCY (Hz)
10
01099-020
0%
VS = 2.7V
TA = 25°C
100
80
60
PSSR–
40
20
PSSR+
0
–20
01099-023
180
1
VS = 5V
TA = 25°C
CURRENT NOISE DENSITY (pA/√Hz)
200
–40
–60
100
MARKER 25.9µV/√Hz
Figure 20. Voltage Noise Density vs. Frequency (10 kHz)
1k
10k
100k
FREQUENCY (Hz)
1M
Figure 23. Power Supply Rejection vs. Frequency
Rev. F | Page 8 of 20
10M
AD8531/AD8532/AD8534
80
PSSR–
60
PSSR+
20
0
–20
–60
100
1k
10k
100k
FREQUENCY (Hz)
1M
50
SMALL SIGNAL OVERSHOOT (%)
VS = 2.7V
TA = 25°C
RL = 2kΩ
30
–OS
20
+OS
10
0
10
100
1000
CAPACITANCE (pF)
10000
40
VS = 2.7V
TA = 25°C
RL = 600Ω
30
20
–OS
10
100
1000
CAPACITANCE (pF)
10000
Figure 28. Small Signal Overshoot vs. Load Capacitance
0.90
SUPPLY CURRENT/AMPLIFIER (mA)
VS = 5V
TA = 25°C
RL = 2kΩ
40
–OS
30
+OS
20
10
0
10
10000
+OS
01099-026
SMALL SIGNAL OVERSHOOT (%)
50
100
1000
CAPACITANCE (pF)
0
10
Figure 25. Small Signal Overshoot vs. Load Capacitance
60
10
Figure 27. Small Signal Overshoot vs. Load Capacitance
01099-025
SMALL SIGNAL OVERSHOOT (%)
40
+OS
20
0
10
10M
Figure 24. Power Supply Rejection vs. Frequency
50
–OS
01099-028
–40
30
100
1000
CAPACITANCE (pF)
0.85
0.80
0.75
0.70
0.65
0.60
Figure 26. Small Signal Overshoot vs. Load Capacitance
VS = 3V
0.55
0.50
–40
10000
VS = 5V
01099-029
40
40
VS = 5V
TA = 25°C
RL = 600Ω
01099-027
100
01099-024
POWER SUPPLY REJECTION (dB)
120
50
VS = 5V
TA = 25°C
SMALL SIGNAL OVERSHOOT (%)
140
–20
0
20
40
TEMPERATURE (°C)
60
80
Figure 29. Supply Current per Amplifier vs. Temperature
Rev. F | Page 9 of 20
AD8531/AD8532/AD8534
TA = 25°C
90
0.6
0.5
0.4
0.3
10
0.2
0.1
1.00
1.50
2.00
SUPPLY VOLTAGE (±V)
2.50
500mV
500ns
01099-033
0%
0
0.75
3.00
Figure 33. Large Signal Transient Response
Figure 30. Supply Current per Amplifier vs. Supply Voltage
VS = 1.35V
VIN = 50mV
AV = 1Ω
RL = 2kΩ
CL = 300pF
TA = 25°C
20mV/DIV
VS = ±2.5V
AV = 1
RL = 2kΩ
TA = 25°C
100
0.7
01099-030
SUPPLY CURRENT/AMPLIFIER (mA)
0.8
VS = ±1.35V
AV = 1
RL = 2kΩ
TA = 25°C
100
90
0V
10
500mV
500ns
01099-034
01099-031
0%
500 ns/DIV
Figure 34. Large Signal Transient Response
Figure 31. Small Signal Transient Response
1V
10µs
100
VS = 2.5V
VIN = 50mV
AV = 1Ω
RL = 2kΩ
CL = 300pF
TA = 25°C
10
0%
01099-035
0V
01099-032
20mV/DIV
90
1V
500ns/DIV
Figure 35. No Phase Reversal
Figure 32. Small Signal Transient Response
Rev. F | Page 10 of 20
AD8531/AD8532/AD8534
THEORY OF OPERATION
Figure 36 illustrates a simplified equivalent circuit for the
AD8531/AD8532/AD8534. Like many rail-to-rail input amplifier
configurations, it comprises two differential pairs, one N-channel
(M1 to M2) and one P-channel (M3 to M4). These differential
pairs are biased by 50 μA current sources, each with a compliance
limit of approximately 0.5 V from either supply voltage rail. The
differential input voltage is then converted into a pair of
differential output currents. These differential output currents
are then combined in a compound folded-cascade second gain
stage (M5 to M9). The outputs of the second gain stage at M8
and M9 provide the gate voltage drive to the rail-to-rail output
stage. Additional signal current recombination for the output
stage is achieved using M11 to M14.
To achieve rail-to-rail output swings, the AD8531/AD8532/
AD8534 design employs a complementary, common source
output stage (M15 to M16). However, the output voltage swing
is directly dependent on the load current because the difference
between the output voltage and the supply is determined by
the AD8531/AD8532/AD8534’s output transistors on channel
resistance (see Figure 12 and Figure 13). The output stage also
exhibits voltage gain by virtue of the use of common source
amplifiers; as a result, the voltage gain of the output stage (thus,
the open-loop gain of the device) exhibits a strong dependence
on the total load resistance at the output of the AD8531/
AD8532/AD8534.
V+
50µA
100µA
20µA
100µA
M11
M12
M5
VB2
M3
As a result of the design of the output stage for the maximum
load current capability, the AD8531/AD8532/AD8534 do not
have any internal short-circuit protection circuitry. Direct
connection of the output of the AD8531/AD8532/AD8534 to
the positive supply in single-supply applications destroys the
device. In applications where some protection is needed, but not
at the expense of reduced output voltage headroom, a low value
resistor in series with the output, as shown in Figure 37, can be
used. The resistor, connected within the feedback loop of the
amplifier, has very little effect on the performance of the amplifier
other than limiting the maximum available output voltage
swing. For single 5 V supply applications, resistors less than
20 Ω are not recommended.
5V
VIN
AD8532
RX
20Ω
POWER DISSIPATION
Although the AD8531/AD8532/AD8534 are capable of
providing load currents to 250 mA, the usable output load
current drive capability is limited to the maximum power
dissipation allowed by the device package used. In any
application, the absolute maximum junction temperature
for the AD8531/AD8532/AD8534 is 150°C. The maximum
junction temperature should never be exceeded because the
device could suffer premature failure. Accurately measuring
power dissipation of an integrated circuit is not always a
straightforward exercise; therefore, Figure 38 is provided
as a design aid for either setting a safe output current drive
level or selecting a heat sink for the package options available
on the AD8531/AD8532/AD8534.
1.5
M4 M2
TJ MAX = 150°C
FREE AIR
NO HEAT SINK
M15
IN–
VOUT
Figure 37. Output Short-Circuit Protection
M8
VB3
M9
M14
20µA
50µA
M7
M10
M13
V–
SOIC
1.0 θJA = 158°C/W
MSOP
θJA = 210°C/W
SOT-23
θJA = 230°C/W
SC70
0.5 θ = 376°C/W
JA
Figure 36. Simplified Equivalent Circuit
TSSOP
θJA = 240°C/W
0
0
25
50
TEMPERATURE (°C)
01099-038
IN+
M16
POWER DISSIPATION (W)
OUT
M6
01099-036
M1
SHORT-CIRCUIT PROTECTION
01099-037
The AD8531/AD8532/AD8534 are all CMOS, high output
current drive, rail-to-rail input/output operational amplifiers.
Their high output current drive and stability with heavy capacitive
loads make the AD8531/AD8532/AD8534 excellent choices as
drive amplifiers for LCD panels.
75
85
100
Figure 38. Maximum Power Dissipation vs. Ambient Temperature
Rev. F | Page 11 of 20
AD8531/AD8532/AD8534
The thermal resistance curves were determined using the
AD8531/AD8532/AD8534 thermal resistance data for each
package and a maximum junction temperature of 150°C. The
following formula can be used to calculate the internal junction
temperature of the AD8531/AD8532/AD8534 for any application:
TJ = PDISS × θJA + TA
The two equations can be solved for P (power)
PDISS = (TA − TC)/(θJC − θJA)
Once power is determined, it is necessary to go back and calculate
the junction temperature to ensure that it has not been exceeded.
The temperature measurements should be directly on the package
and on a spot on the board that is near the package but not
touching it. Measuring the package could be difficult. A very
small bimetallic junction glued to the package can be used, or
measurement can be done using an infrared sensing device if
the spot size is small enough.
To calculate the power dissipated by the AD8531/AD8532/
AD8534, the following equation can be used:
PDISS = ILOAD × (VS − VOUT)
where:
ILOAD is the output load current.
VS is the supply voltage.
VOUT is the output voltage.
CALCULATING POWER BY MEASURING SUPPLY
CURRENT
The quantity within the parentheses is the maximum voltage
developed across either output transistor. As an additional
design aid in calculating available load current from the
AD8531/AD8532/AD8534, Figure 5 illustrates the output
voltage of the AD8531/AD8532/AD8534 as a function of
load resistance.
POWER CALCULATIONS FOR VARYING OR
UNKNOWN LOADS
Often, calculating power dissipated by an integrated circuit to
determine if the device is being operated in a safe range is not
as simple as it may seem. In many cases, power cannot be directly
measured, which may be the result of irregular output waveforms
or varying loads; indirect methods of measuring power are
required.
There are two methods to calculate power dissipated by an
integrated circuit. The first can be done by measuring the
package temperature and the board temperature, and the
other is to directly measure the supply current of the circuit.
CALCULATING POWER BY MEASURING AMBIENT
AND CASE TEMPERATURE
Given the two equations for calculating junction temperature
where:
TJ is the junction temperature.
TA is the ambient temperature.
θJA is the junction to ambient thermal resistance.
where:
TC is the case temperature.
θJA and θJC are given in the data sheet.
TA + PDISS θJA = TC + PθJC
where:
TJ is the junction temperature.
PDISS is the power dissipation.
θJA is the package thermal resistance, junction-to-case.
TA is the ambient temperature of the circuit.
TJ = TA + PDISS θJA
TJ = TC + PDISS θJA
Power can be calculated directly, knowing the supply voltage
and current. However, supply current may have a dc component
with a pulse into a capacitive load, which can make rms current
very difficult to calculate. It can be overcome by lifting the supply
pin and inserting an rms current meter into the circuit. For this
to work, be sure the current is being delivered by the supply pin
being measured. This is usually a good method in a single-supply
system; however, if the system uses dual supplies, both supplies
may need to be monitored.
INPUT OVERVOLTAGE PROTECTION
As with any semiconductor device, whenever the condition
exists for the input to exceed either supply voltage, the input
overvoltage characteristic of the device must be considered.
When an overvoltage occurs, the amplifier can be damaged,
depending on the magnitude of the applied voltage and the
magnitude of the fault current. Although not shown here, when
the input voltage exceeds either supply by more than 0.6 V, pn
junctions internal to the AD8531/AD8532/AD8534 energize,
allowing current to flow from the input to the supplies. As
illustrated in the simplified equivalent input circuit (see Figure 36),
the AD8531/AD8532/AD8534 do not have any internal current
limiting resistors; therefore, fault currents can quickly rise to
damaging levels.
This input current is not inherently damaging to the device, as
long as it is limited to 5 mA or less. For the AD8531/AD8532/
AD8534, once the input voltage exceeds the supply by more than
0.6 V, the input current quickly exceeds 5 mA. If this condition
continues to exist, an external series resistor should be added.
The size of the resistor is calculated by dividing the maximum
overvoltage by 5 mA. For example, if the input voltage could
reach 10 V, the external resistor should be (10 V/5 mA) = 2 kΩ.
This resistance should be placed in series with either or both
inputs if they are exposed to an overvoltage condition.
Rev. F | Page 12 of 20
AD8531/AD8532/AD8534
OUTPUT PHASE REVERSAL
5V
CAPACITIVE LOAD DRIVE
The AD8531/AD8532/AD8534 exhibit excellent capacitive load
driving capabilities. They can drive up to 10 nF directly, as
shown in Figure 25 through Figure 28. However, even though
the device is stable, a capacitive load does not come without a
penalty in bandwidth. As shown in Figure 39, the bandwidth is
reduced to less than 1 MHz for loads greater than 10 nF. A snubber
network on the output does not increase the bandwidth, but it
does significantly reduce the amount of overshoot for a given
capacitive load. A snubber consists of a series RC network (RS,
CS), as shown in Figure 40, connected from the output of the
device to ground. This network operates in parallel with the
load capacitor, CL, to provide phase lag compensation. The
actual value of the resistor and capacitor is best determined
empirically.
AD8532
VIN
100mV p-p
RS
5Ω
CS
1µF
VOUT
CL
47nF
01099-040
Some operational amplifiers designed for single-supply operation
exhibit an output voltage phase reversal when their inputs are
driven beyond their useful common-mode range. The AD8531/
AD8532/AD8534 are free from reasonable input voltage range
restrictions, provided that input voltages no greater than the
supply voltage rails are applied. Although the output of the
device does not change phase, large currents can flow through
internal junctions to the supply rails, which was described in the
Input Overvoltage Protection section. Without limit, these fault
currents can easily destroy the amplifier. The technique
recommended in the Input Overvoltage Protection section
should therefore be applied in those applications where the
possibility of input voltages exceeding the supply voltages exists.
Figure 40. Snubber Network Compensates for Capacitive Loads
The first step is to determine the value of the resistor, RS. A good
starting value is 100 Ω. This value is reduced until the small signal
transient response is optimized. Next, CS is determined; 10 μF is a
good starting point. This value is reduced to the smallest value
for acceptable performance (typically, 1 μF). For the case of a
47 nF load capacitor on the AD8531/AD8532/AD8534, the
optimal snubber network is 5 Ω in series with 1 μF. The benefit
is immediately apparent, as seen in Figure 41. The top trace was
taken with a 47 nF load, and the bottom trace was taken with
the 5 Ω in series with a 1 μF snubber network in place. The
amount of overshoot and ringing is dramatically reduced. Table 5
illustrates a few sample snubber networks for large load
capacitors.
Table 5. Snubber Networks for Large Capacitive Loads
Load Capacitance (CL)
0.47 nF
4.7 nF
47 nF
Snubber Network (RS, CS)
300 Ω, 0.1 μF
30 Ω, 1 μF
5 Ω, 1 μF
50mV
100
47nF LOAD
90
ONLY
4.0
VS = ±2.5V
RL = 1kΩ
TA = 25°C
3.5
2.5
1.5
50mV
1.0
0.5
0
0.01
0.1
1
CAPACITIVE LOAD (nF)
10
10µs
Figure 41. Overshoot and Ringing Are Reduced by Adding a Snubber
Network in Parallel with the 47 nF Load
100
Figure 39. Unity-Gain Bandwidth vs. Capacitive Load
Rev. F | Page 13 of 20
01099-041
SNUBBER 10
IN CIRCUIT
0%
2.0
01099-039
BANDWIDITH (MHz)
3.0
AD8531/AD8532/AD8534
APPLICATIONS INFORMATION
Many applications require stable voltage outputs relatively close
in potential to an unregulated input source. This low dropout
type of reference/regulator is readily implemented with a railto-rail output op amp and is particularly useful when using a
higher current device, such as the AD8531/AD8532/AD8534.
A typical example is the 3.3 V or 4.5 V reference voltage developed
from a 5 V system source. Generating these voltages requires a
three terminal reference, such as the REF196 (3.3 V) or the
REF194 (4.5 V), both of which feature low power, with sourcing
outputs of 30 mA or less. Figure 42 shows how such a reference
can be outfitted with an AD8531/AD8532/AD8534 buffer for
higher currents and/or voltage levels, plus sink and source load
capability.
VS
5V
U2
AD8531
C1
0.1µF
VOUT1 =
3.3V @ 100mA
R2
10kΩ 1%
R1
10kΩ
1%
VC
ON/OFF
CONTROL
INPUT CMOS HI
(OR OPEN) = ON
LO = OFF
2
3
U1
REF196
4
C2
0.1µF
R3
(See Text)
6
VOUT2 =
3.3V
C5
100µF/16V
TANTALUM
R5
0.2Ω
C4
1µF
R4
3.3kΩ
VS
COMMON
VOUT
COMMON
01099-042
C3
0.1µF
Figure 42. High Output Current Reference/Regulator
The low dropout performance of this circuit is provided by
stage U2, an AD8531 connected as a follower/buffer for the
basic reference voltage produced by U1. The low voltage
saturation characteristic of the AD8531/AD8532/AD8534
allows up to 100 mA of load current in the illustrated use,
as a 5 V to 3.3 V converter with good dc accuracy. In fact,
the dc output voltage change for a 100 mA load current delta
measures less than 1 mV. This corresponds to an equivalent
output impedance of < 0.01 Ω. In this application, the stable
3.3 V from U1 is applied to U2 through a noise filter, R1 to C1.
U2 replicates the U1 voltage within a few millivolts, but at a
higher current output at VOUT1, with the ability to both sink and
source output current(s), unlike most IC references. R2 and C2
in the feedback path of U2 provide additional noise filtering.
Transient performance of the reference/regulator for a 100 mA
step change in load current is also quite good and is largely
determined by the R5 to C5 output network. With values as
shown, the transient is about 20 mV peak and settles to within
2 mV in less than 10 μs for either polarity. Although room exists
for optimizing the transient response, any changes to the R5 to
C5 network should be verified by experiment to preclude the
possibility of excessive ringing with some capacitor types.
To scale VOUT2 to another (higher) output level, the optional
resistor R3 (shown dotted in Figure 42) is added, causing the
new VOUT1 to become
R2 ⎞
VOUT1 = VOUT2 × ⎛⎜1 +
⎟
R3 ⎠
⎝
The circuit can either be used as shown, as a 5 V to 3.3 V
reference/regulator, or with on/off control. By driving Pin 3 of
U1 with a logic control signal as noted, the output is switched
on/off. Note that when on/off control is used, R4 must be used
with U1 to speed on/off switching.
SINGLE-SUPPLY, BALANCED LINE DRIVER
The circuit in Figure 43 is a unique line driver circuit topology
used in professional audio applications. It was modified for
automotive and multimedia audio applications. On a single 5 V
supply, the line driver exhibits less than 0.7% distortion into a
600 Ω load from 20 Hz to 15 kHz (not shown) with an input
signal level of 4 V p-p. In fact, the output drive capability of the
AD8531/AD8532/AD8534 maintains this level for loads as
small as 32 Ω. For input signals less than 1 V p-p, the THD is
less than 0.1%, regardless of load. The design is a transformerless, balanced transmission system where output commonmode rejection of noise is of paramount importance. As with
the transformer-based system, either output can be shorted
to ground for unbalanced line driver applications without changing
the circuit gain of 1. Other circuit gains can be set according to the
equation in the diagram. This allows the design to be easily
configured for inverting, noninverting, or differential operation.
R3
10kΩ
R5
50Ω
2
3
R2
10kΩ
A2
VIN
5V
6
GAIN = R3
R2
1
7
R1
10kΩ
R11
R12
10kΩ 10kΩ
A1
A1, A2 = 1/2 AD8532
VOUT1
12V
2
3
C3
47µF
R6
10kΩ
R7
10kΩ
5V
C1
22µF
1
R10
10kΩ
SET: R7, R10, R11 = R2
6
5
A2
R8
100kΩ
A1 5
7
R13
10kΩ
R9
100kΩ
R14
50Ω
RL
600Ω
C2
1µF
C4
47µF
VOUT2
SET: R6, R12, R13 = R3
Rev. F | Page 14 of 20
Figure 43. Single-Supply, Balanced Line Driver for Multimedia and
Automotive Applications
01099-043
HIGH OUTPUT CURRENT, BUFFERED
REFERENCE/REGULATOR
AD8531/AD8532/AD8534
Because of its speed and large output drive, the AD8531/
AD8532/AD8534 make an excellent headphone driver, as
illustrated in Figure 44. Its low supply operation and rail-to-rail
inputs and outputs give a maximum signal swing on a single
5 V supply. To ensure maximum signal swing available to drive
the headphone, the amplifier inputs are biased to V+/2, which
in this case is 2.5 V. The 100 kΩ resistor to the positive supply
is equally split into two 50 kΩ resistors, with their common
point bypassed by 10 μF to prevent power supply noise from
contaminating the audio signal.
This active crossover exhibits less than 0.4% THD+N at output
levels of 1.4 V rms using general-purpose, unity-gain HP/LP stages.
In this 2-way example, the LO signal is a dc-to-500 Hz LP woofer
output, and the HI signal is the HP (>500 Hz) tweeter output.
U1B forms an LP section at 500 Hz, while U1A provides an HP
section, covering frequencies ≥500 Hz.
C1
0.01µF
2
R2
31.6kΩ
CIN
10µF
4
R5
31.6kΩ
R6
31.6kΩ
C4
0.02µF
100kΩ
100kΩ
DC –
500Hz
270µF
+
C3
0.01µF
LO
100kΩ
6
7
5
U1B
10µF
VS
TO U1
R4
49.9Ω
R7
15.8kΩ
VS
AD8532
5V
0.1µF
1µF/0.1µF
AD8532
1
RIN
100kΩ
V 5V
V 5V
HI
100kΩ
U1A
3
VIN
500Hz
AND UP
VS
C2
0.01µF
The audio signal is then ac-coupled to each input through a
10 μF capacitor. A large value is needed to ensure that the 20 Hz
audio information is not blocked. If the input already has the
proper dc bias, the ac coupling and biasing resistors are not
required. A 270 μF capacitor is used at the output to couple the
amplifier to the headphone. This value is much larger than that
used for the input because of the low impedance of the headphones, which can range from 32 Ω to 600 Ω. An additional 16 Ω
resistor is used in series with the output capacitor to protect the
output stage of the op amp by limiting the capacitor discharge
current. When driving a 48 Ω load, the circuit exhibits less
than 0.3% THD+N at output drive levels of 4 V p-p.
50kΩ
R3
49.9Ω 270µF
+
R1
31.6kΩ
100µF/25V
01099-045
SINGLE-SUPPLY HEADPHONE AMPLIFIER
COM
Figure 45. A Single-Supply, 2-Way Active Crossover
10µF
50kΩ
LEFT
INPUT
1/2
AD8532
16Ω
270µF
LEFT
HEADPHONE
50kΩ
10µF
100kΩ
V
50kΩ
50kΩ
10µF
1/2
AD8532
16Ω 270µF
RIGHT
HEADPHONE
50kΩ
100kΩ
01099-044
RIGHT
INPUT
10µF
Figure 44. Single-Supply, Stereo Headphone Driver
SINGLE-SUPPLY, 2-WAY LOUDSPEAKER
CROSSOVER NETWORK
Active filters are useful in loudspeaker crossover networks
because of small size, relative freedom from parasitic effects, the
ease of controlling low/high channel drive, and the controlled
driver damping provided by a dedicated amplifier. Both SallenKey (SK) and multiple-feedback (MFB) filter architectures are
useful in implementing active crossover networks. The circuit
shown in Figure 45 is a single-supply, 2-way active crossover
that combines the advantages of both filter topologies.
The crossover example frequency of 500 Hz can be shifted
lower or higher by frequency scaling of either resistors or
capacitors. In configuring the circuit for other frequencies,
complementary LP/HP action must be maintained between
sections, and component values within the sections must be in
the same ratio. Table 6 provides a design aid to adaptation, with
suggested standard component values for other frequencies.
For additional information on the active filters and active crossover
networks, refer to the data sheet for the OP279, a dual rail-torail, high output current, operational amplifier.
Table 6. RC Component Selection for Various Crossover
Frequencies 1
Crossover Frequency (Hz)
100
200
319
500
1k
2k
5k
10 k
1
R1/C1 (U1A) 2 , R5/C3 (U1B) 3
160 kΩ/0.01 μF
80.6 kΩ/0.01 μF
49.9 kΩ/0.01 μF
31.6 kΩ/0.01 μF
16 kΩ/0.01 μF
8.06 kΩ/0.01 μF
3.16 kΩ/0.01 μF
1.6 kΩ/0.01 μF
Applicable for Filter A = 2.
For Sallen-Key stage U1A: R1 = R2, and C1 = C2, and so on.
3
For multiple feedback stage U1B: R6 = R5, R7 = R5/2, and C4 = 2C3.
2
Rev. F | Page 15 of 20
AD8531/AD8532/AD8534
DIRECT ACCESS ARRANGEMENT FOR TELEPHONE
LINE INTERFACE
TO TELEPHONE
LINE
1:1
2kΩ
R3
360Ω
1
2
A1
R5
10kΩ
6.2V
ZO
600Ω
R2
9.09kΩ
C1
R1
10kΩ 0.1µF
TRANSMIT
TxA
3
6.2V
5V DC
T1
MIDCOM
671-8005
R6
10kΩ
6
7
A2
R7
10kΩ
5
R8
10kΩ
10µF
R9
10kΩ
R11
10kΩ
A1, A2 = 1/2 AD8532
A3, A4 = 1/2 AD8532
Rev. F | Page 16 of 20
R12
10kΩ
R10
10kΩ
2
3
A3
1
R13
R14
10kΩ 14.3kΩ
2kΩ
6
5
P2
Rx GAIN
ADJUST
A4
7
RECEIVE
RxA
C2
0.1µF
Figure 46. Single-Supply Direct Access Arrangement for Modems
01099-046
Figure 46 illustrates a 5 V only transmit/receive telephone line
interface for 600 Ω transmission systems. It allows full duplex
transmission of signals on a transformer-coupled 600 Ω line in
a differential manner. A1 provides gain that can be adjusted to
meet the modem output drive requirements. Both A1 and A2
are configured to apply the largest possible signal on a single
supply to the transformer. Because of the high output current
drive and low dropout voltage of the AD8531/AD8532/AD8534,
the largest signal available on a single 5 V supply is approximately
4.5 V p-p into a 600 Ω transmission system. A3 is configured as
a difference amplifier for two reasons: it prevents the transmit
signal from interfering with the receive signal, and it extracts
the receive signal from the transmission line for amplification
by A4. The gain of A4 can be adjusted in the same manner as
that of A1 to meet the input signal requirements of the modem.
Standard resistor values permit the use of single in-line package
(SIP) format resistor arrays.
P1
Tx GAIN
ADJUST
AD8531/AD8532/AD8534
OUTLINE DIMENSIONS
2.20
2.00
1.80
1.35
1.25
1.15
5
2.40
2.10
1.80
4
1
2
3
PIN 1
0.65 BSC
1.00
0.90
0.70
1.10
0.80
0.30
0.15
0.10 MAX
0.40
0.10
0.46
0.36
0.26
0.22
0.08
SEATING
PLANE
0.10 COPLANARITY
COMPLIANT TO JEDEC STANDARDS MO-203-AA
Figure 47. 5-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-5)
Dimensions shown in millimeters
2.90 BSC
5
4
2.80 BSC
1.60 BSC
1
2
3
PIN 1
0.95 BSC
1.90
BSC
1.30
1.15
0.90
1.45 MAX
0.15 MAX
0.50
0.30
0.22
0.08
10°
5°
0°
SEATING
PLANE
0.60
0.45
0.30
COMPLIANT TO JEDEC STANDARDS MO-178-A A
Figure 48. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
5.00 (0.1968)
4.80 (0.1890)
8
1
5
6.20 (0.2441)
5.80 (0.2284)
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-A A
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 49. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
Rev. F | Page 17 of 20
012407-A
4.00 (0.1574)
3.80 (0.1497)
AD8531/AD8532/AD8534
3.20
3.00
2.80
8
3.20
3.00
2.80
5.15
4.90
4.65
5
1
4
PIN 1
0.65 BSC
0.95
0.85
0.75
1.10 MAX
0.15
0.00
0.38
0.22
0.80
0.60
0.40
8°
0°
0.23
0.08
SEATING
PLANE
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 50. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
3.10
3.00
2.90
8
5
4.50
4.40
4.30
1
6.40 BSC
4
PIN 1
0.65 BSC
0.15
0.05
1.20
MAX
COPLANARITY
0.10
0.30
0.19
SEATING 0.20
PLANE
0.09
8°
0°
0.75
0.60
0.45
COMPLIANT TO JEDEC STANDARDS MO-153-AA
Figure 51. 8-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-8)
Dimensions shown in millimeters
5.10
5.00
4.90
14
8
4.50
4.40
4.30
6.40
BSC
1
7
PIN 1
1.05
1.00
0.80
0.65
BSC
1.20
MAX
0.15
0.05
0.30
0.19
0.20
0.09
SEATING
COPLANARITY
PLANE
0.10
8°
0°
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
Figure 52. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
Rev. F | Page 18 of 20
0.75
0.60
0.45
AD8531/AD8532/AD8534
8.75 (0.3445)
8.55 (0.3366)
8
14
1
7
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0039)
COPLANARITY
0.10
0.51 (0.0201)
0.31 (0.0122)
6.20 (0.2441)
5.80 (0.2283)
0.50 (0.0197)
0.25 (0.0098)
1.75 (0.0689)
1.35 (0.0531)
SEATING
PLANE
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AB
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 53. 14-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-14)
Dimensions shown in millimeters and (inches)
Rev. F | Page 19 of 20
060606-A
4.00 (0.1575)
3.80 (0.1496)
AD8531/AD8532/AD8534
ORDERING GUIDE
Model
AD8531AKS-R2
AD8531AKS-REEL7
AD8531AKSZ-R2 1
AD8531AKSZ-REEL71
AD8531ART-REEL
AD8531ART-REEL7
AD8531ARTZ-REEL1
AD8531ARTZ-REEL71
AD8531AR
AD8531AR-REEL
AD8531ARZ1
AD8531ARZ-REEL1
AD8532AR
AD8532AR-REEL
AD8532AR-REEL7
AD8532ARZ1
AD8532ARZ-REEL1
AD8532ARZ-REEL71
AD8532ARM-R2
AD8532ARM-REEL
AD8532ARMZ-R21
AD8532ARMZ-REEL1
AD8532ARU
AD8532ARU-REEL
AD8532ARUZ1
AD8532ARUZ-REEL1
AD8534AR
AD8534AR-REEL
AD8534ARZ1
AD8534ARZ-REEL1
AD8534ARU
AD8534ARU-REEL
AD8534ARUZ1
AD8534ARUZ-REEL1
1
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
−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
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Package Description
5-Lead SC70
5-Lead SC70
5-Lead SC70
5-Lead SC70
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
8-Lead TSSOP
8-Lead TSSOP
8-Lead TSSOP
8-Lead TSSOP
14-Lead SOIC_N
14-Lead SOIC_N
14-Lead SOIC_N
14-Lead SOIC_N
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
Z = RoHS Compliant Part.
©1996–2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D01099-0-1/08(F)
Rev. F | Page 20 of 20
Package Option
KS-5
KS-5
KS-5
KS-5
RJ-5
RJ-5
RJ-5
RJ-5
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
RM-8
RM-8
RM-8
RM-8
RU-8
RU-8
RU-8
RU-8
R-14
R-14
R-14
R-14
RU-14
RU-14
RU-14
RU-14
Branding
A7B
A7B
A0Q
A0Q
A7A
A7A
A0P
A0P
ARA
ARA
A0R
A0R