CMOS Single-Supply, Rail-to-Rail Input/Output
Operational Amplifiers with Shutdown
AD8591/AD8592/AD8594
Rev. B
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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
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
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.
PIN CONFIGURATIONS
UT A
1
V–
2
+IN A
3
V+
6
SD
5
–IN A
4
AD
8591
TOP VIEW
(Not to Scale)
1106-001
Figure 1. 6-Lead SOT-23 (RJ Suffix)
SDB
V–
+IN B
OUT A
–IN A
+IN A
V+
OUT B
–IN B
SDA
1
2
3
4
5
10
9
8
7
6
AD
8592
TOP VIEW
(Not to Scale)
1106-002
Figure 2. 10-Lead MSOP (RM Suffix)
OUT A
–IN A
V+
+IN A
+IN B
–IN B
OUT B
NC
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
SD
1
2
3
4
16
15
14
13
5 12
6 11
7 10
8 9
NC = NO CONNECT
AD
8594
TOP VIEW
(Not to Scale)
01106-003
Figure 3. 16-Lead Narrow SOIC (R Suffix)
OUT A
–IN A
V+
+IN A
+IN B
–IN B
OUT B
NC
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
SD
NC = NO CONNECT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AD
8594
TOP VIEW
(Not to Scale)
01106-004
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.
