Datasheet AD820 (Analog Devices)

Single-Supply, Rail-to-Rail, Low Power, FET Input Op Amp AD820 FEATURES PIN CONFIGURATIONS True single-supply operation NULL 1 8 NC Output swings rail-to-rail AD820 Input voltage range extends below ground –IN 2 7 +VS Single-supply capability from 5 V to 30 V +IN 3 6 VOUT Dual-supply capability from ±2.5 V to ±15 V –V TOP VIEW S 4 5 NULL (Not to Scale) Excellent load drive
001
Capacitive load drive up to 350 pF NC = NO CONNECT
00873- Figure 1. 8-Lead PDIP
Minimum output current of 15 mA Excellent ac performance for low power NC 1 8 NC 800 μA maximum quiescent current AD820 Unity-gain bandwidth: 1.8 MHz –IN 2 7 +VS Slew rate of 3 V/μs +IN 3 6 VOUT Excellent dc performance –V TOP VIEW S 4 5 NC (Not to Scale) 800 μV maximum input offset voltage
002
2 μV/°C typical offset voltage drift NC = NO CONNECT
00873- Figure 2. 8-Lead SOIC_N and 8-Lead MSOP
25 pA maximum input bias current Low noise: 13 nV/√Hz @ 10 kHz APPLICATIONS Battery-powered precision instrumentation Photodiode preamps Active filters 12-bit to 14-bit data acquisition systems Medical instrumentation Low power references and regulators GENERAL DESCRIPTION
The AD820 is a precision, low power FET input op amp that The AD820 is available in two performance grades. The A and can operate from a single supply of 5 V to 36 V, or dual supplies B grades are rated over the industrial temperature range of of ±2.5 V to ±18 V. It has true single-supply capability, with an −40°C to +85°C. The AD820 is offered in three 8-lead package input voltage range extending below the negative rail, allowing options: plastic DIP (PDIP), surface mount (SOIC) and (MSOP). the AD820 to accommodate input signals below ground in the single-supply mode. Output voltage swing extends to within
1V 1V 20µs
10 mV of each rail, providing the maximum output dynamic range.
100
Offset voltage of 800 μV maximum, offset voltage drift of
90
2 μV/°C, typical input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to 1 GΩ. 1.8 MHz unity gain bandwidth, −93 dB THD at 10 kHz, and 3 V/μs slew rate are provided for a low supply current of 800 μA. The AD820 drives up to 350 pF of direct capacitive load and provides a minimum output current of
10
15 mA. This al ows the amplifier to handle a wide range of load
0%
conditions. This combination of ac and dc performance, plus 004
1V
the outstanding load drive capability, results in an exceptionally 00873- versatile amplifier for the single-supply user. Figure 3. Gain-of-2 Amplifier; VS = 5 V, 0 V, VIN = 2.5 V Sine Centered at 1.25 V
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Document Outline Features Applications Pin Configurations General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Typical Performance Characteristics Applications Information Input Characteristics Output Characteristics Single-Supply Half-Wave and Full-Wave Rectifiers 4.5 V Low Dropout, Low Power Reference Low Power, 3-Pole, Sallen Key Low-Pass Filter Offset Voltage Adjustment Outline Dimensions Ordering Guide