AD823 Fast Delivery |IC PHOENIX CO.,LIMITED

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AD823
Dual, 16 MHz, Rail-to-Rail FET Input Amplifier
REV.0Dual, 16 MHz, Rail-to-Rail
FET Input Amplifier
FEATURES
Single Supply Operation
Output Swings Rail to Rail
Input Voltage Range Extends Below Ground
Single Supply Capability from +3 V to +36 V
High Load Drive
Capacitive Load Drive of 500 pF, G = +1
Output Current of 15 mA, 0.5 V from Supplies
Excellent AC Performance on 2.6 mA/Amplifier
–3 dB Bandwidth of 16 MHz, G = +1
350 ns Settling Time to 0.01% (2 V Step)
Slew Rate of 22 V/ms
Good DC Performance
800 mV Max Input Offset Voltage
2 mV/8C Offset Voltage Drift
25 pA Max Input Bias Current
Low Distortion
–108 dBc Worst Harmonic @ 20 kHz
Low Noise
16 nV/√Hz @ 10 kHz
No Phase Inversion with Inputs to the Supply Rails
APPLICATIONS
Battery Powered Precision Instrumentation
Photodiode Preamps
Active Filters
12- to 16-Bit Data Acquisition Systems
Medical Instrumentation
CONNECTION DIAGRAM
8-Pin Plastic Mini-DIP
and
8-Lead SOIC
PRODUCT DESCRIPTION
The AD823 is a dual precision, 16 MHz, JFET input op amp
that can operate from a single supply of +3.0 V to +36 V, or
dual supplies of ±1.5 V to ±18 V. It has true single supply
capability with an input voltage range extending below ground
in single supply mode. Output voltage swing extends to within
50 mV of each rail for IOUT ≤ 100 μA providing outstanding out-
put dynamic range.
Offset voltage of 800 μV max, offset voltage drift of 2 μV/°C,
input bias currents below 25 pA and low input voltage noise
provide dc precision with source impedances up to a Gigohm.
16 MHz, –3 dB bandwidth, –108 dB THD @ 20 kHz and
22 V/μs slew rate are provided with a low supply current of
2.6 mA per amplifier. The AD823 drives up to 500 pF of direct
capacitive load as a follower, and provides an output current of
15 mA, 0.5 V from the supply rails. This allows the amplifier to
handle a wide range of load conditions.
This combination of ac and dc performance, plus the outstand-
ing load drive capability results in an exceptionally versatile am-
plifier for applications such as A/D drivers, high-speed active
filters, and other low voltage, high dynamic range systems.
The AD823 is available over the industrial temperature range of
–40°C to +85°C and is offered in both 8-pin plastic DIP and
SOIC packages.
GND
Figure 1.Output Swing, VS = +3 V, G = +1
Figure 2.Small Signal Bandwidth, G = +1
Specification subject to change without notice.
(@ TA = +25°C, VS = +5 V, RL = 2 kΩ to +2.5 V, unless otherwise noted)AD823–SPECIFICATIONS
AD823
NOISE/DISTORTION PERFORMANCE
DC PERFORMANCE
POWER SUPPLY
Specification subject to change without notice.
SPECIFICATIONS(@ TA = +25°C, VS = +3.3 V, RL = 2 kΩ to +1.65 V, unless otherwise noted)
NOISE/DISTORTION PERFORMANCE
DC PERFORMANCE
POWER SUPPLY
Specification subject to change without notice.
AD823–SPECIFICATIONS(@ TA = +25°C, VS = ±15 V, RL = 2 kΩ to 0 V, unless otherwise noted)
ABSOLUTE MAXIMUM RATINGS1
SupplyVoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+36V
InternalPowerDissipation2
PlasticPackage (N) . . . . . . . . . . . . . . . . . . . . . . . .1.3Watts
SmallOutlinePackage (R) . . . . . . . . . . . . . . . . . . .0.9Watts
Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . .±VS
DifferentialInputVoltage . . . . . . . . . . . . . . . . . . . . . . .±1.2V
Output Short Circuit Duration. . . . . . . . . . . . . . . . . . . . .Observe Power Derating Curves
Storage Temperature Range N, R . . . . . . . . .–65°C to +125°C
Operating Temperature Range . . . . . . . . . . . .–40°C to +85°C
Lead Temperature Range (Soldering10sec) . . . . . . . .+300°C
NOTESStresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.Specification is for device in free air:
8-Pin Plastic Package: θJA = 90°C/Watt
8-Pin SOIC Package: θJA = 160°C/Watt
ORDERING GUIDE
Figure 3.Maximum Power Dissipation vs. Temperature
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD823 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
AD823–Typical Characteristics
INPUT OFFSET VOLTAGE – µV–200200–150
UNITS
–100–50050100150
Figure 4.Typical Distribution of Input Offset Voltage
INPUT OFFSET VOLTAGE DRIFT – µV/°C–67–5
UNITS–3–2345–1012
Figure 5.Typical Distribution of Input Offset Voltage Drift
COMMON MODE VOLTAGE – Volts
INPUT BIAS CURRENT – pA–3–2–1012345
Figure 6.Input Bias Current vs. Common-Mode Voltage
INPUT BIAS CURRENT – pA
UNITS2345678910
Figure 7.Typical Distribution of Input Bias Current
TEMPERATURE – °C
INPUT BIAS CURRENT – pA
10k5075100125
Figure 8.Input Bias Current vs. Temperature
Figure 9.Input Bias Current vs. Common-Mode Voltage
LOAD RESISTANCE – Ω
OPEN-LOOP GAIN – dB
1001k10k100k500k
Figure 10.Open-Loop Gain vs. Load Resistance
OUTPUT VOLTAGE – Volts
OPEN-LOOP GAIN – k
–1.5–1.001.52.0V
Figure 11.Open-Loop Gain vs. Output Voltage, VS = ±2.5 V
FREQUENCY – Hz
100100k
THD – dB10k
Figure 12.Total Harmonic Distortion vs. Frequency
TEMPERATURE – °C
OPEN-LOOP GAIN – dB
–255356595125
Figure 13.Open-Loop Gain vs. Temperature
FREQUENCY – Hz
100100M1k10k100k1M10M
OPEN-LOOP GAIN – dB
PHASE MARGIN – Degrees
–20
Figure 14.Open-Loop Gain and Phase vs. Frequency
Figure 15.Input Voltage Noise vs. Frequency
AD823–Typical Characteristics
FREQUENCY – MHz
CLOSED-LOOP GAIN – dB
3.276.249.2112.1815.1518.1221.0924.0627.0330
Figure 16.Closed Loop Gain vs. Frequency
FREQUENCY – Hz
OUTPUT RESISTANCE –
1001k10k100k10M1M
Figure 17.Output Resistance vs. Frequency, VS = 5 V,
Gain = +1
SETTLING TIME – ns
OUTPUT STEP SIZE FROM 0V TO V
SHOWN
– Volts
300
Figure 18.Inverter Settling Time vs. Output Step Size
Figure 19.Common-Mode Rejection vs. Frequency
Figure 20.Output Saturation Voltage vs. Load Current
Figure 21.Quiescent Current vs. Supply Voltage

Partno	Mfg	Dc	Qty	Available	Descript
AD823	AD	N/a	96	avai	Dual, 16 MHz, Rail-to-Rail FET Input Amplifier