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AD824AN-AD824AR-AD824AR-14-AD824AR-16
Single Supply, Rail-to-Rail Low Power, FET-Input Op Amp
REV.A
Single Supply, Rail-to-Rail
Low Power, FET-Input Op Amp
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 mA/Amp
Wide Bandwidth:2 MHz
Slew Rate:2 V/ms
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
GENERAL DESCRIPTIONThe AD824 is a quad, FET input, single supply amplifier, fea-
turing 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 AD824 is guaranteed to operate from a 3V single supply
up to ±15 volt dual supplies.
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 millivolts of the supplies. Capacitive loads
to 350pF can be handled without oscillation.
The FET input combined with laser trimming provides an input
that has extremely low bias currents with guaranteed offsets be-
low 300μV. 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.
PIN CONFIGURATIONS
14-Lead Epoxy DIP
(N Suffix)
14-Lead Epoxy SO
(R Suffix)
AD824–SPECIFICATIONS
ELECTRICAL SPECIFICATIONSDYNAMIC PERFORMANCE
(@ VS = +5.0 V, VCM = 0 V, VOUT = 0.2 V, TA = +258C unless otherwise noted)
ELECTRICAL SPECIFICATIONS
(@ VS = 615.0 V, VOUT = 0 V, TA = +258C unless otherwise noted)
AD824
AD824–SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
(@ VS = +3.0 V, VCM = 0 V, VOUT = 0.2 V, TA = +258C unless otherwise noted)
AD824–Typical CharacteristicsFigure 4.Open-Loop Gain/Phase and Small Signal
Response, VS = +5V, No Load
10010M1k10k100k1M
GAIN – dB
PHASE – Degrees
100Figure 2.Open-Loop Gain/Phase and Small Signal
Response, VS = ±15V, No Load
GAIN – dB
Response, VS = +3V, No Load
1k
GAIN – dB
VOUTPhase Reversal with Inputs Exceeding Supply by
LOAD CURRENT – A
0.810m5µ10µ50µ100µ500µ1m5m
OUTPUT TO RAIL – Volts
AD824–Typical CharacteristicsFigure 14.TC VOS Distribution, –55°C to +125°C, VS = 5, 0
Figure 15.Input Offset Current vs. Temperature
Figure 16.Input Bias Current vs. Temperature
NOISE DENSITY – nV/Figure 11.Voltage Noise Density
0.00011001k10k20k
FREQUENCY – Hz
THD+N – %Figure 12.Total Harmonic Distortion
OFFSET VOLTAGE – mV
NUMBER OF UNITS
120Figure 13.Input Offset Distribution, VS = 5, 0
