The INA121 is a FET-input, low power instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general purpose applications. Low bias current (±4pA) allows use with high impedance sources.
Gain can be set from 1V to 10,000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage.
The INA121 is laser-trimmed for very low offset voltage (±200µV), low offset drift (±2µV/°C), and high common-mode rejection (106dB at G = 100). It operates on power supplies as low as ±2.25V (+4.5V), allowing use in battery operated and single 5V systems. Quiescent current is only 450µA.
Package options include 8-pin plastic DIP and SO-8 surface mount. All are specified for the -40°C to +85°C industrial temperature range.
Products containing the "INA121" keyword are: INA121P , INA121P/INA121PA/INA121P , INA121PA , INA121PA-INA121PA , INA121PAG4 , INA121PAG4 , INA121PG4 , INA121PG4 , INA121U , INA121U-ND , INA121U/2K5 , INA121U/2K5 , INA121U/2K5G4 , INA121U/2K5G4 , INA121U/UA , INA121U2K5 , INA121U2K5G4 , INA121UA , INA121UA/2K5 , INA121UA/2K5| Status | ACTIVE |
| SubFamily | Instrumentation amplifiers |
| Number of channels | 1 |
| Vs | 4.5 |
| Input offset (+/-) | 500 |
| Gain | 10000 |
| Noise at 1 kHz | 20 |
| CMRR | 96 |
| Input offset drift (+/-) | 5 |
| Input bias current (+/-) | 0.05 |
| Iq | 0.45 |
| Bandwidth at min gain | 0.6 |
| Gain error (+/-) | 0.7 |
| Operating temperature range | -40 to 85 |
| Package Group | PDIP|8 |
| Approx. price | 2.50 | 1ku |
| Package size: mm2:W x L (PKG) | See datasheet (PDIP) |
| Noise at 0.1 Hz-10 Hz | 1 |
| Gain non-linearity (+/-) | 0.005 |
| Rating | Catalog |