Datasheet AD823 (Analog Devices)

Dual, 16 MHz, Rail-to-Rail FET Input Amplifier Data Sheet AD823 FEATURES CONNECTION DIAGRAM Single-supply operation OUT1 1 8 +VS Output swings rail-to-rail –IN1 2 7 OUT2 Input voltage range extends below ground +IN1 3 6 –IN2 Single-supply capability from 3 V to 36 V
001
–V 4 5 +IN2 S AD823 High load drive
00901- Figure 1. 8-Lead PDIP and SOIC
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 RL = 100kΩ −3 dB bandwidth of 16 MHz, G = +1 CL = 50pF +V 350 ns settling time to 0.01% (2 V step) S = +3V 3V G = +1 Slew rate of 22 V/µs Good dc performance 800 µV maximum input offset voltage 2 µV/°C offset voltage drift 25 pA maximum input bias current Low distortion: −108 dBc worst harmonic @ 20 kHz Low noise: 16 nV/√Hz @ 10 kHz GND No phase inversion with inputs to the supply rails
002
APPLICATIONS 500mV 200µs
00901-
Battery-powered precision instrumentation
Figure 2. Output Swing, +VS = +3 V, G = +1
Photodiode preamps 2 Active filters +VS = +5V 1 G = +1 12-bit to 16-bit data acquisition systems Medical instrumentation 0 –1 GENERAL DESCRIPTION ) dB –2
The AD823 is a dual precision, 16 MHz, JFET input op amp
T ( U –3
that can operate from a single supply of 3.0 V to 36 V or from
TP –4
dual supplies of ±1.5 V to ±18 V. It has true single-supply
OU
capability with an input voltage range extending below ground
–5
in single-supply mode. Output voltage swing extends to within
–6
50 mV of each rail for I
–7
OUT ≤ 100 µA, providing outstanding output dynamic range.
–81k 10k 100k 1M 10M
003 An offset voltage of 800 µV maximum, an offset voltage drift of
FREQUENCY (Hz)
00901- 2 µV/°C, input bias currents below 25 pA, and low input voltage Figure 3. Small Signal Bandwidth, G = +1 noise provide dc precision with source impedances up to a This combination of ac and dc performance, plus the outstanding Gigaohm. It provides 16 MHz, −3 dB bandwidth, −108 dB THD load drive capability, results in an exceptionally versatile ampli- @ 20 kHz, and a 22 V/µs slew rate with a low supply current of fier for applications such as A/D drivers, high speed active 2.6 mA per amplifier. The AD823 drives up to 500 pF of direct filters, and other low voltage, high dynamic range systems. 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 The AD823 is available over the industrial temperature range of handle a wide range of load conditions. −40°C to +85°C and is offered in both 8-lead PDIP and 8-lead SOIC packages.
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Document Outline Features Applications Connection Diagram General Description Table of Contents Revision History Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Typical Performance Characteristics Theory of Operation Output Impedance Application Notes Input Characteristics Output Characteristics A/D Driver 3 V, Single-Supply Stereo Headphone Driver Second-Order Low-Pass Filter Single-Supply Half-Wave and Full-Wave Rectifiers Outline Dimensions Ordering Guide