Low Cost, 24 MHz, Rail-to-Rail,
Quad Amplifiers
AD8648
FEATURES
PIN CONFIGURATIONS
Low offset voltage: 2.5 mV max
Single-supply operation: 2.7 V to 5.5 V
Low noise: 6 nV/√Hz
Wide bandwidth: 24 MHz
Slew rate: 12 V/μs
1
2
3
4
5
6
7
OUT A
–IN A
+IN A
V+
14
13
OUT D
–IN D
AD8648
TOP VIEW
(Not to Scale)
12 +IN D
11
V–
+IN B
–IN B
OUT B
10 +IN C
High output current: 150 mA
No phase reversal
9
–IN C
8
OUT C
Low input bias current: 1 pA
Low supply current: 2 mA max
Unity-gain stable
Figure 1. 14-Lead TSSOP (RU-14)
OUT A
–IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
APPLICATIONS
Barcode scanners
Battery-powered instrumentation
Multipole filters
AD8648
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
Sensors
ASIC input or output amplifiers
Audio
Figure 2. 14-Lead SOIC (R-14)
Photodiode amplification
GENERAL DESCRIPTION
The AD8648 is a quad, rail-to-rail, input and output, single-
supply amplifier featuring low offset voltage, wide signal
bandwidth, and low input voltage and current noise.
Applications for the part include portable and low powered
instrumentation, audio amplification for portable devices,
portable phone headsets, bar code scanners, and multipole
filters. The ability to swing rail to rail at both the input and
output enables designers to buffer CMOS ADCs, DACs, ASICs,
and other wide output swing devices in single-supply systems.
The combination of 24 MHz bandwidth, low offset, low noise,
and very low input bias current makes these amplifiers useful in
a wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from the
combination of performance features. AC applications benefit
from the wide bandwidth and low distortion. The AD8648
family offers high output drive capability, which is excellent for
audio line drivers and other low impedance applications.
Rev. 0
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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