CMOS Rail-to-Rail General-Purpose
Amplifiers
AD8541/AD8542/AD8544
Single-supply operation: 2.7 V to 5.5 V
Low supply current: 45 μA/amplifier
Wide bandwidth: 1 MHz
No phase reversal
Low input currents: 4 pA
Unity gain stable
Rail-to-rail input and output
Qualified for automotive applications
PIN CONFIGURATIONS
OUT A 1
AD8541
5 V+
V– 2
+IN A 3
4 –IN A
00935-001
FEATURES
Figure 1. 5-Lead SC70 and 5-Lead SOT-23
(KS and RJ Suffixes)
APPLICATIONS
8
NC
2
7
V+
+IN A 3
6
OUT A
4
5
NC
NC 1
–IN A
V–
AD8541
00935-002
ASIC input or output amplifiers
Sensor interfaces
Piezoelectric transducer amplifiers
Medical instrumentation
Mobile communications
Audio outputs
Portable systems
NC = NO CONNECT
Figure 2. 8-Lead SOIC
(R Suffix)
GENERAL DESCRIPTION
Rail-to-rail inputs and outputs are useful to designers buffering
ASICs in single-supply systems. The AD8541/AD8542/AD8544
are optimized to maintain high gains at lower supply voltages,
making them useful for active filters and gain stages.
The AD8541/AD8542/AD8544 are specified over the extended
industrial temperature range (–40°C to +125°C). The AD8541
is available in 5-lead SOT-23, 5-lead SC70, and 8-lead SOIC
packages. The AD8542 is available in 8-lead SOIC, 8-lead MSOP,
and 8-lead TSSOP surface-mount packages. The AD8544 is
available in 14-lead narrow SOIC and 14-lead TSSOP surfacemount packages. All MSOP, SC70, and SOT versions are available
in tape and reel only. See the Ordering Guide for automotive
models.
1
–IN A
AD8542
8
V+
2
7
OUT B
+IN A
3
6
–IN B
V–
4
5
+IN B
Figure 3. 8-Lead SOIC, 8-Lead MSOP, and 8-Lead TSSOP
(R, RM, and RU Suffixes)
OUT A
1
14 OUT D
–IN A
2
13 –IN D
+IN A
3
12 +IN D
AD8544
11 V–
V+
4
+IN B
5
–IN B
6
9
–IN C
OUT B
7
8
OUT C
10 +IN C
00935-004
Very low input bias currents enable the AD8541/AD8542/AD8544
to be used for integrators, photodiode amplifiers, piezoelectric
sensors, and other applications with high source impedance.
The supply current is only 45 μA per amplifier, ideal for battery
operation.
OUT A
00935-003
The AD8541/AD8542/AD8544 are single, dual, and quad railto-rail input and output, single-supply amplifiers featuring very
low supply current and 1 MHz bandwidth. All are guaranteed to
operate from a 2.7 V single supply as well as a 5 V supply. These
parts provide 1 MHz bandwidth at a low current consumption
of 45 μA per amplifier.
Figure 4. 14-Lead SOIC and 14-Lead TSSOP
(R and RU Suffixes)
Rev. G
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