The INA187 and INA299 are precise, bidirectional current sense amplifiers that can measure voltage drops across shunt resistors over a wide common-mode range from -2V to 42V or –2V to 80V respectively, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±150µV, maximum), small gain error (±0.15%, maximum) and a high DC common mode rejection ratio (typical 120dB). The INA187 and INA299 are not only designed for bidirectional DC current measurements, but also for high-speed applications (such as transient detection and fast overcurrent protection) with a high signal bandwidth of 650kHz and fast settling time.
The INA187 and INA299 operate from a single 2.7V to 12V supply, drawing 650µA of supply current. The INA187 and INA299 are available in three gain options: 20V/V, 50V/V, 100V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.
The INA187 and INA299 are specified over an operating temperature range of −40°C to +125°C and available in a 6-pin SOT-23 package.
Table 3-3 INA187EVM Gain Option Summary| Product | Gain (V/V) |
|---|
| INA187A1 | 20 |
| INA187A2 | 50 |
| INA187A3 | 100 |
Table 3-4 INA299EVM Gain Option Summary| Product | Gain (V/V) |
|---|
| INA299A1 | 20 |
| INA299A2 | 50 |
| INA299A3 | 100 |