Single Supply, Rail-to-Rail
Low Power, FET-Input Op Amp
AD824
FEATURES
Single Supply Operation: 3 V to 30 V
Very Low Input Bias Current: 2 pA
Wide Input Voltage Range
Rail-to-Rail Output Swing
Low Supply Current: 500 A/Amp
Wide Bandwidth: 2 MHz
Slew Rate: 2 V/s
No Phase Reversal
APPLICATIONS
Photo Diode Preamplifier
Battery Powered Instrumentation
Power Supply Control and Protection
Medical Instrumentation
Remote Sensors
Low Voltage Strain Gage Amplifiers
DAC Output Amplifier
PIN CONFIGURATIONS
14-Lead Epoxy SOIC
(R Suffix)
14 OUT D
OUT A 1
13 –IN D
–IN A 2
+IN A 3
AD824
12 +IN D
+IN B 5
11 V–
TOP VIEW
(Not to Scale)
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
V+ 4
16-Lead Epoxy SOIC
(R Suffix)
16 OUT D
OUT A 1
–IN A
2
+IN A
3
V+
4
+IN B
5
12 +IN C
–IN B
6
11 –IN C
OUT B 7
NC 8
15 –IN D
14 +IN D
AD824
13 V–
10 OUT C
9 NC
NC = NO CONNECT
The AD824 is a quad, FET input, single supply amplifier, featuring rail-to-rail outputs. The combination of FET inputs and
rail-to-rail outputs makes the AD824 useful in a wide variety of
low voltage applications where low input current is a primary
consideration.
The FET input combined with laser trimming provides an input
that has extremely low bias currents with guaranteed offsets
below 1 mV. This enables high accuracy designs even with
high source impedances. Precision is combined with low
noise, making the AD824 ideal for use in battery powered
medical equipment.
The AD824 is guaranteed to operate from a 3 V single supply
up to ± 15 V dual supplies. AD824AR-3V Parametric Performance at 3 V is fully guaranteed.
Applications for the AD824 include portable medical equipment,
photo diode preamplifiers and high impedance transducer
amplifiers.
Fabricated on ADI’s complementary bipolar process, the AD824
has a unique input stage that allows the input voltage to safely
extend beyond the negative supply and to the positive supply
without any phase inversion or latchup. The output voltage
swings to within 15 mV of the supplies. Capacitive loads to
350 pF can be handled without oscillation.
The ability of the output to swing rail-to-rail enables designers
to build multistage filters in single supply systems and maintain
high signal-to-noise ratios.
GENERAL DESCRIPTION
The AD824 is specified over the extended industrial (–40∞C to
+85∞C) temperature range and is available in narrow 14-lead
and 16-lead SOIC packages.
REV. C
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use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
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