The AD820 is a precision, low power FET input op amp that can operate from a single supply of 5 V to 36 V, or dual supplies of ±2.5 V to ±18 V. It has true single-supply capability, with an input voltage range extending below the negative rail, allowing the AD820 to accommodate input signals below ground in the single-supply mode. Output voltage swing extends to within 10 mV of each rail, providing the maximum output dynamic range. Battery-powered precision instrumentation Photodiode preamps Active filters 12-bit to 14-bit data acquisition systems Medical instrumentation Low power references and regulators
Offset voltage of 800 μV maximum, offset voltage drift of 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 15 mA. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for the single-supply user.
The AD820 is available in two performance grades. The A and B grades are rated over the industrial temperature range of −40°C to +85°C. The AD820 is offered in three 8-lead package options: plastic DIP (PDIP), surface mount (SOIC) and (MSOP).
Data Sheet, Rev. F, 11/08
Features and BenefitsOutput swings rail-to-rail Input voltage range extends below ground Single-supply capability from 5 V to 36 V Dual-supply capability from ±2.5 V to ±18 V Capacitive load drive up to 350 pF Minimum output current of 15 mA 800 μA maximum quiescent current Unity-gain bandwidth: 1.8 MHz Slew rate of 3 V/μs 800 μV maximum input offset voltage 2 μV/°C typical offset voltage drift 25 pA maximum input bias current | AmplifiersAD820 SPICE Macro-Model |
Document | note |
AD820: Single-Supply, Rail-to-Rail, Low Power, FET-Input Op Amp Data Sheet (Rev. H) | PDF 582 kB |
Document | note |
AN-106: A Collection of Amp Applications | PDF 1094 kB |
AN-358: Noise and Operational Amplifier Circuits | PDF 593 kB |
AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0) | PDF 5.3 M |
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Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
---|---|---|---|---|---|---|
AD820ANZ Production | 8 ld PDIP | OTH 50 | -40 to 85C | 2.28 | 2.05 | Y |
AD820AR Production | 8 ld SOIC | OTH 98 | -40 to 85C | 2.54 | 2.28 | N |
AD820AR-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 2.28 | N |
AD820AR-REEL7 Production | 8 ld SOIC | REEL 750 | -40 to 85C | 2.54 | 2.28 | N |
AD820ARMZ Production | 8 ld MSOP | OTH 50 | -40 to 85C | 2.18 | 1.97 | Y |
AD820ARMZ-R7 Production | 8 ld MSOP | REEL 1000 | -40 to 85C | 0 | 1.97 | Y |
AD820ARMZ-RL Production | 8 ld MSOP | REEL 3000 | -40 to 85C | 0 | 1.97 | Y |
AD820ARZ Production | 8 ld SOIC | OTH 98 | -40 to 85C | 2.18 | 1.97 | Y |
AD820ARZ-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 1.97 | Y |
AD820ARZ-REEL7 Production | 8 ld SOIC | REEL 750 | -40 to 85C | 2.18 | 1.97 | Y |
AD820BR Production | 8 ld SOIC | OTH 98 | -40 to 85C | 3.69 | 3.33 | N |
AD820BR-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 3.33 | N |
AD820BRZ Production | 8 ld SOIC | OTH 98 | -40 to 85C | 3.2 | 2.87 | Y |
AD820BRZ-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 2.87 | Y |
AD820BRZ-REEL7 Production | 8 ld SOIC | REEL 750 | -40 to 85C | 3.2 | 2.87 | Y |
Part Number | Description | Price | RoHS |
---|---|---|---|
EVAL-PRAOPAMP-1KSZ | Single KS-5 lead SC70 Evaluation Board | 20.19 | Y |
EVAL-PRAOPAMP-1RJZ | Single RJ-5 lead SOT23 Evaluation Board | 20.19 | Y |
EVAL-PRAOPAMP-1RMZ | Single RM-8 lead MSOP Evaluation Board | 20.19 | Y |
EVAL-PRAOPAMP-1RZ | Single R-8 lead SOIC Evaluation Board | 20.19 | Y |