INA281A4QDBVRQ1 Current Sense Amplifiers Automotive AEC-Q100, -4-V to 110-V, 1.3-MHz current sense amplifier 5-SOT-23 -40 to 125
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | Texas Instruments |
| Product Category: | Current Sense Amplifiers |
| Series: | INA281-Q1 |
| Number of Channels: | 1 Channel |
| GBP - Gain Bandwidth Product: | 900 kHz |
| Vcm - Common Mode Voltage: | 48 V |
| CMRR - Common Mode Rejection Ratio: | 140 dB |
| Ib - Input Bias Current: | 20 uA |
| Vos - Input Offset Voltage: | 30 uV |
| Supply Voltage - Max: | 20 V |
| Supply Voltage - Min: | 2.7 V |
| Operating Supply Current: | 1.5 mA |
| Gain Error: | 0.07 % |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 125 C |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOT-3-5 |
| Qualification: | AEC-Q100 |
| Packaging: | Reel |
| Packaging: | Cut Tape |
| Packaging: | MouseReel |
| Amplifier Type: | High Precision Current Sense Amplifier |
| Brand: | Texas Instruments |
| Development Kit: | INA281EVM |
| en - Input Voltage Noise Density: | 50 nV/sqrt Hz |
| Gain V/V: | 200 V/V |
| Output Type: | Analog |
| Pd - Power Dissipation: | 250 mW |
| Product: | Current Sense Amplifiers |
| Product Type: | Current Sense Amplifiers |
| Settling Time: | 10 us |
| Shutdown: | No Shutdown |
| SR - Slew Rate: | 2.5 V/us |
| Factory Pack Quantity: | 3000 |
| Subcategory: | Amplifier ICs |
♠ INA281-Q1 AEC-Q100, –4-V to 110-V, 1.3-MHz Current-Sense Amplifier
The INA281-Q1 is a high-precision current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA281-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.3 MHz and an 65-dB AC CMRR (at 50 kHz).
The INA281-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range for currentsensing applications.
The INA281-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.
• AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40 °C to +125 °C, TA
• Functional Safety-Capable
– Documentation available to aid functional safety system design
• Wide common-mode voltage:
– Operational voltage: −4 V to +110 V
– Survival voltage: −20 V to +120 V
• Excellent CMRR:
– 120-dB DC CMRR
– 65-dB AC CMRR at 50 kHz
• Accuracy:
– Gain:
• Gain error: ±0.5% (maximum)
• Gain drift: ±20 ppm/°C (maximum)
– Offset:
• Offset voltage: ±55 µV (typical)
• Offset drift: ±0.1 µV/°C (typical)
• Available gains:
– INA281A1-Q1, INA281B1-Q1 : 20 V/V
– INA281A2-Q1, INA281B2-Q1 : 50 V/V
– INA281A3-Q1, INA281B3-Q1 : 100 V/V
– INA281A4-Q1, INA281B4-Q1 : 200 V/V
– INA281A5-Q1, INA281B5-Q1 : 500 V/V
• High bandwidth: 1.3 MHz
• Slew rate: 2.5V/µs
• Quiescent current: 1.5 mA
• Automatic transmission
• Automotive HVAC compressor module
• Valve/motor actuator
• Gasoline & diesel engine platform
• Pump
