The AD8021 is an exceptionally high performance, high speed voltage feedback amplifier that can be used in 16-bit resolution systems. It is designed to have both low voltage and low current noise (2.1 nV/√Hz typical and 2.1 pA/√Hz typical) while operating at the lowest quiescent supply current (7 mA @ ±5 V) among today's high speed, low noise op amps. The AD8021 operates over a wide range of supply voltages from ±2.25 V to ±12 V, as well as from single 5 V supplies, making it ideal for high speed, low power instruments. An output disable pin allows further reduction of the quiescent supply current to 1.3 mA.
The AD8021 is both technically superior and priced considerably less than comparable amps drawing much higher quiescent current. The AD8021 is a high speed, general-purpose amplifier, ideal for a wide variety of gain configurations, and can be used throughout a signal processing chain and in control loops. The AD8021 is available in both standard 8-lead SOIC and MSOP packages in the industrial temperature range of -40°C to +85°C.
Features and Benefits2.1 nV/√Hz input voltage noise 2.1 pA/√Hz input current noise Constant bandwidth from G = -1 to G = -10 200 MHz (G = -1) 190 MHz (G = -10) 34 mW or 6.7 mA typ for 5 V supply 34 mW or 6.7 mA typ for 5 V supply -93 dBc second harmonic, fc = 1 MHz -108 dBc third harmonic, fc = 1 MHz 1 mV max input offset voltage 0.5 µV/°C input offset voltage drift | Amplifiers
Audio & Video ProductsBuilding Technology
SPICE ModelsReference Designs |
| Document | note |
| AD8021: Low Noise, High Speed Amplifier for 16-Bit Systems Data Sheet (Rev. F) | PDF 579 kB |
| Document | note |
| UG-135: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead SOIC and Exposed Paddle) | PDF 261 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8021AR Production | 8 ld SOIC | OTH 98 | -40 to 85C | 1.77 | 1.51 | N |
| AD8021ARMZ Production | 8 ld MSOP | OTH 50 | -40 to 85C | 1.54 | 1.31 | Y |
| AD8021ARMZ-REEL Production | 8 ld MSOP | REEL 3000 | -40 to 85C | 0 | 1.31 | Y |
| AD8021ARMZ-REEL7 Production | 8 ld MSOP | REEL 1000 | -40 to 85C | 0 | 1.31 | Y |
| AD8021ARZ Production | 8 ld SOIC | OTH 98 | -40 to 85C | 1.54 | 1.31 | Y |
| AD8021ARZ-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 1.31 | Y |
| AD8021ARZ-REEL7 Production | 8 ld SOIC | REEL 1000 | -40 to 85C | 0 | 1.31 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| EVAL-HSOPAMP-1CPZ | Evaluation Board for 8-LD LFCSP | 18.25 | Y |
| EVAL-HSOPAMP-1KSZ | Evaluation Bare Board for 5 and 6-lead SC70 Package | 18.25 | Y |
| EVAL-HSOPAMP-1RJZ | Evaluation Bare Board for SOT-23 Package | 18.25 | Y |
| EVAL-HSOPAMP-1RZ | Evaluation Bare Board for 8-lead SOIC Package | 18.25 | Y |
| EVAL-HSOPAMP-E-1RZ | Evaluation Bare Board for 8 Lead SOIC dedicated feedback with epad connection | 18.25 | Y |
| EVAL-HSOPAMP-N-1RZ | Evaluation Bare Board for 8 Lead SOIC w/Null or Compensation functionality on Pins 1 and or 8 | 18.25 | Y |
