| Common mode voltage (Max) (V) | 26 |
| Common mode voltage (Min) (V) | 0 |
| Input offset (+/-) (Max) (uV) | 100 |
| Input offset drift (+/-) (Typ) (uV/C) | 0.1 |
| Gain (V/V) | 1, 0.5, 0.25, 0.125 |
| Gain error (%) | 0.5 |
| Gain error drift (+/-) (Max) (ppm/°C) | 83 |
| CMRR (Min) (dB) | 120 |
| Bandwidth (kHz) | 5.5 |
| Supply voltage (Max) (V) | 5.5 |
| Supply voltage (Min) (V) | 3 |
| Iq (Max) (mA) | 1.5 |
| Digital interface | I2C, SMBus |
| Features | Alert Function, Bi-directional, Low-side Capable, Programmable Gain |
| Resolution (Bits) | 12 |
| Rating | Catalog |
| Operating temperature range (C) | -40 to 125 |
- SENSES BUS VOLTAGES FROM 0V TO +26V
- REPORTS CURRENT, VOLTAGE, AND POWER; STORES PEAKS
- TRIPLE WATCHDOG LIMITS:
- Lower Warning with Delay
- Upper Over-limit, No Delay
- Fast Analog Critical
- HIGH ACCURACY: 1% MAX OVER TEMP
- APPLICATIONS
- SERVERS
- TELECOM EQUIPMENT
- AUTOMOTIVE
- POWER MANAGEMENT
- BATTERY CHARGERS
- WELDING EQUIPMENT
- POWER SUPPLIES
- TEST EQUIPMENT
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
The INA209 is a high-side current shunt and power monitor with an I2C interface. The INA209 monitors both shunt drop and shunt bus voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The INA209 features two separate, onboard watchdog capabilities: a warning comparator and an over-limit comparator. The warning comparator is useful for monitoring lower warning limits and incorporates a user-defined delay. The over-limit comparator assists with monitoring upper limits that could require immediate system shutdown.
The INA209 also includes an analog comparator and a programmable digital-to-analog converter (DAC) that combine to provide the fastest possible responses to current overload conditions.
The INA209 can be used together with hot swap controllers that already use a current sense resistor. The INA209 full-scale range can be selected to be either within the hot-swap controller sense limits, or wide enough to include them.
The INA209 senses across shunts on buses that can vary from 0V to 26V. The device uses a single +3V to +5.5V supply, drawing a maximum of 1.5mA of supply current. It is specified for operation from -25°C to +85°C.
