INA260 Precision Digital Current and Power Monitor With Low-Drift, Precision Integrated Shunt
1 Features
- Precision Integrated Shunt Resistor:
- Current Sense Resistance: 2 mΩ
- Tolerance Equivalent to 0.1%
- 15-A Continuous From –40°C to +85°C
- 10 ppm/°C Temperature Coefficient
(0°C to +125°C )
- Senses Bus Voltages From 0 V to 36 V
- High-Side or Low-Side Sensing
- Reports Current, Voltage, and Power
- High Accuracy:
- 0.15% System Gain Error (Maximum)
- 5-mA Offset (Maximum)
- Configurable Averaging Options
- 16 Programmable Addresses
- Operates From a 2.7-V to 5.5-V Power Supply
- 16-Pin, TSSOP Package
2 Applications
- Test Equipment
- Servers
- Telecom Equipment
- Computing
- Power Management
- Battery Chargers
- Power Supplies
3 Description
The INA260 is a digital-output, current, power, and voltage monitor with an I2C and SMBus™-compatible interface with an integrated precision shunt resistor. It enables high-accuracy current and power measurements and over-current detection at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side, current-shunt monitor that measures current flowing through the internal current-sensing resistor. The integration of the precision current-sensing resistor provides calibration-equivalent measurement accuracy with ultra-low temperature drift performance and ensures that an optimized Kelvin layout for the sensing resistor is always obtained.
The INA260 features up to 16 programmable addresses on the I2C-compatible interface. The digital interface allows programmable alert thresholds, analog-to-digital converter (ADC) conversion times, and averaging. To facilitate ease of use, an internal multiplier enables direct readouts of current in amperes and power in watts.
The device operates from a single 2.7-V to 5.5-V supply, drawing 310 μA (typical) of supply current. The INA260 is specified over the operating temperature range between –40°C and +125°C and is available in the 16-pin TSSOP package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| INA260 | TSSOP (16) | 5.00 mm x 4.40 mm |
- For all available packages, see the orderable addendum at the end of the datasheet.
High-Side Sensing Application
5 Related Products
| DEVICE | DESCRIPTION |
|---|---|
| INA250 | 36-V, Low- or High-Side, Bidirectional, Zero-Drift Current-Shunt Monitor with Precision Integrated Shunt Resistor |
| INA226 | High-Side or Low-Side Measurement, Bi-Directional Current and Power Monitor with I2C Compatible Interface |
| INA230 | High- or Low-Side Measurement, Bidirectional Current/Power Monitor with I2C Interface |
| INA210, INA211, INA212, INA213, INA214, INA215 | Voltage Output, Low- or High-Side Measurement, Bidirectional, Zero-Drift Series, Current-Shunt Monitors |
6 Pin Configuration and Functions
Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| A0 | 5 | Digital input | Address pin. Connect to GND, SCL, SDA, or VS. Table 2 shows pin settings and corresponding addresses. |
| A1 | 4 | Digital input | Address pin. Connect to GND, SCL, SDA, or VS. Table 2 shows pin settings and corresponding addresses. |
| ALERT | 7 | Digital output | Multi-functional alert, open-drain output. |
| GND | 6, 11 | Analog | Ground pin for both analog and digital circuits. |
| IN+ | 1, 2, 3 | Analog input | Connect to supply for high side current sensing or to load ground for low side sensing. |
| IN– | 14, 15, 16 | Analog input | Connect to load for high side current sensing or to board ground for low side sensing. |
| NC | 13 | — | No internal connection. Can be grounded or left floating. |
| SCL | 9 | Digital input | Serial bus clock line input. |
| SDA | 8 | Digital I/O | Serial bus data line, open-drain input/output. |
| VBUS | 12 | Analog input | Bus voltage monitor input. |
| VS | 10 | Analog | Power supply input, connect a 2.7 V to 5.5 V supply to this pin. |
