CMOS Single-Supply, Rail-to-Rail Input/Output
Operational Amplifiers with Shutdown
AD8591/AD8592/AD8594
FEATURES
Single-supply operation: 2.5 V to 6 V
High output current: ±250 mA
Extremely low shutdown supply current: 100 nA
Low supply current: 750 μA/Amp
Wide bandwidth: 3 MHz
Slew rate: 5 V/μs
No phase reversal
Very low input bias current
High impedance outputs when in shutdown mode
Unity-gain stable
PIN CONFIGURATIONS
OUT A
1
6
V+
AD8591
V–
2
+IN A
3
5
SD
TOP VIEW
(Not to Scale)
4
01106-001
–IN A
Figure 1. 6-Lead SOT-23 (RJ Suffix)
OUT A
1
–IN A
2
+IN A
3
V–
4
SDA
5
10
V+
AD8592
TOP VIEW
(Not to Scale)
9
8
7
6
OUT B
–IN B
SDB
01106-002
01106-004
01106-003
+IN B
APPLICATIONS
Mobile communication handset audio
PC audio
PCMCIA/modem line driving
Battery-powered instrumentation
Data acquisition
ASIC input or output amplifiers
LCD display reference level drivers
Figure 2. 10-Lead MSOP (RM Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
16
OUT D
15
–IN D
13
V–
TOP VIEW
+IN B
5
(Not to Scale)
12
+IN C
AD8594
14
+IN D
–IN B
6
OUT B
7
NC
8
11
–IN C
10
OUT C
9
SD
NC = NO CONNECT
GENERAL DESCRIPTION
The AD8591, AD8592, and AD8594 are single, dual, and quad
rail-to-rail, input and output single-supply amplifiers featuring
250 mA output drive current and a power saving shutdown mode.
The AD8592 includes an independent shutdown function for
each amplifier. When both amplifiers are in shutdown mode,
the total supply current is reduced to less than 1 μA. The AD8591
and AD8594 include a single master shutdown function that
reduces the total supply current to less than 1 μA. All amplifier
outputs are in a high impedance state when in shutdown mode.
These amplifiers have very low input bias currents, making them
suitable for integrators and diode amplification. Outputs are stable
with virtually any capacitive load. Supply current is less than
750 μA per amplifier in active mode.
Applications for these amplifiers include audio amplification for
portable computers, portable phone headsets, sound ports, sound
cards, and set-top boxes. The AD859x family is capable of driving
heavy capacitive loads, such as LCD panel reference levels.
The ability to swing rail to rail at both the input and output enables
designers to buffer CMOS DACs, ASICs, and other wide output
swing devices in single-supply systems.
Figure 3. 16-Lead Narrow SOIC (R Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
NC
8
16
OUT D
15
–IN D
AD8594
TOP VIEW
(Not to Scale)
14
+IN D
13
V–
12
+IN C
11
–IN C
10
OUT C
9
SD
NC = NO CONNECT
Figure 4. 16-Lead TSSOP (RU Suffix)
The AD8591, AD8592, and AD8594 are specified over the
industrial temperature range (−40°C to +85°C). The AD8591,
single, is available in the tiny 6-lead SOT-23 package. The AD8592,
dual, is available in the 10-lead surface-mount MSOP package. The
AD8594, quad, is available in 16-lead narrow SOIC and 16-lead
TSSOP packages.
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.
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
©2009 Analog Devices, Inc. All rights reserved.
AD8591/AD8592/AD8594
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 11
Input Voltage Protection............................................................ 11
Output Phase Reversal ............................................................... 11
Output Short-Circuit Protection .............................................. 11
Power Dissipation....................................................................... 11
Capacitive Loading..................................................................... 12
PC98-Compliant Headphone/Speaker Amplifier .................. 12
A Combined Microphone and Speaker Amplifier for
Cellphone and Portable Headsets ............................................ 13
An Inexpensive Sample-and-Hold Circuit ............................. 13
Direct Access Arrangement for PCMCIA Modems
(Telephone Line Interface) ........................................................ 14
Single-Supply Differential Line Driver .................................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 16
REVISION HISTORY
1/09—Rev. A to Rev. B
Updated Format .................................................................. Universal
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Deleted Spice Model for AD8591/AD8592/AD8594 Amplifiers
Sections ............................................................................................ 12
Changes to PC98-Compliant Headphone/Speaker Amplifier
Section and Figure 38 ..................................................................... 12
Changes to Figure 39 ...................................................................... 13
Changes to Figure 42 and Figure 43 ............................................. 14
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 16
Rev. B | Page 2 of 16
AD8591/AD8592/AD8594
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
S
= 2.7 V, V
CM
= 1.35 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
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
Open-Loop Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
Supply Current Shutdown Mode
Symbol
V
OS
−40°C < T
A
< +85°C
I
B
−40°C < T
A
< +85°C
I
OS
−40°C < T
A
< +85°C
CMRR
A
VO
ΔV
OS
/ΔT
ΔI
B
/ΔT
ΔI
OS
/ΔT
V
OH
V
OL
I
OUT
Z
OUT
PSRR
I
SY
I
SD
I
SD1
I
SD2
SHUTDOWN INPUTS
Logic High Voltage
Logic Low Voltage
Logic Input Current
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
V
INH
V
INL
I
IN
SR
t
S
GBP
Φo
CS
e
n
i
n
V
CM
= 0 V to 2.7 V
R
L
= 2 kΩ, V
O
= 0.3 V to 2.4 V
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
I
L
= 10 mA
−40°C to +85°C
I
L
= 10 mA
−40°C to +85°C
f = 1 MHz, A
V
= 1
V
S
= 2.5 V to 6 V
V
O
= 0 V
−40°C < T
A
< +85°C
All amplifiers shut down
−40°C < T
A
< +85°C
Amplifier 1 shut down (AD8592)
Amplifier 2 shut down (AD8592)
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
R
L
= 2 kΩ
To 0.01%
45
0
38
45
25
20
50
20
2.61
60
±250
60
55
1
1.25
1
1
1.4
1.4
100
125
1
5
Test Conditions
Min
Typ
Max
25
30
50
60
25
30
2.7
Unit
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
fA/°C
fA/°C
V
V
mV
mV
mA
Ω
dB
mA
mA
μA
μA
mA
mA
V
V
μA
V/μs
μs
MHz
Degrees
dB
nV/√Hz
nV/√Hz
pA/√Hz
2.55
2.5
0.1
1.6
0.5
1
3.5
1.4
2.2
67
65
45
30
0.05
f = 1 kHz, R
L
= 2 kΩ
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. B | Page 3 of 16
AD8591/AD8592/AD8594
V
S
= 5.0 V, V
CM
= 2.5 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
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
Open-Loop Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
Supply Current Shutdown Mode
Symbol
V
OS
−40°C < T
A
< +85°C
I
B
−40°C < T
A
< +85°C
I
OS
−40°C < T
A
< +85°C
CMRR
A
VO
ΔV
OS
/ΔT
ΔI
B
/ΔT
ΔI
OS
/ΔT
V
OH
V
OL
I
OUT
Z
OUT
PSRR
I
SY
I
SD
I
SD1
I
SD2
SHUTDOWN INPUTS
Logic High Voltage
Logic Low Voltage
Logic Input Current
DYNAMIC PERFORMANCE
Slew Rate
Full Power Bandwidth
Settling Time
Gain Bandwidth Product
Phase Margin
Channel Separation
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
V
INH
V
INL
I
IN
SR
BW
P
t
S
GBP
Φo
CS
e
n
i
n
V
CM
= 0 V to 5 V
R
L
= 2 kΩ, V
O
= 0.5 V to 4.5 V
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
I
L
= 10 mA
−40°C to +85°C
I
L
= 10 mA
−40°C to +85°C
f = 1 MHz, A
V
= 1
V
S
= 2.5 V to 6 V
V
O
= 0 V
−40°C < T
A
< +85°C
All amplifiers shut down
−40°C < T
A
< +85°C
Amplifier 1 shut down (AD8592)
Amplifier 2 shut down (AD8592)
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
−40°C < T
A
< +85°C
R
L
= 2 kΩ
1% distortion
To 0.01%
45
0
38
15
47
30
20
50
20
4.94
50
±250
40
55
1.25
1.75
1
1
1.6
1.6
100
125
1
5
Test Conditions
Min
Typ
2
Max
25
30
50
60
25
30
5
Unit
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
fA/°C
fA/°C
V
V
mV
mV
mA
Ω
dB
mA
mA
μA
μA
mA
mA
V
V
μA
V/μs
kHz
μs
MHz
Degrees
dB
nV/√Hz
nV/√Hz
pA/√Hz
4.9
4.85
0.1
2.4
0.8
1
5
325
1.6
3
70
65
45
30
0.05
f = 1 kHz, R
L
= 10 kΩ
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. B | Page 4 of 16
AD8591/AD8592/AD8594
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration to GND
1
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
1
THERMAL RESISTANCE
Rating
6V
GND to V
S
±6 V
Observe Derating Curves
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
θ
JA
is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 4.
Package Type
6-Lead SOT-23 (RJ)
10-Lead MSOP (RM)
16-Lead SOIC (R)
16-Lead TSSOP (RU)
θ
JA
230
200
120
180
θ
JC
92
44
36
35
Unit
°C/W
°C/W
°C/W
°C/W
For supplies less than ±5 V, the differential input voltage is limited to the
supplies.
ESD CAUTION
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 listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. B | Page 5 of 16
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