The INA220-Q1 device is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The INA220-Q1 device monitors both shunt drop and supply voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses. The separate shunt input on the INA220-Q1 device allows it to be used in systems with low-side sensing.
The INA220-Q1 device senses across shunts on buses that can vary from 0 to 26 V, useful for low-side sensing or CPU power supplies. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The INA220-Q1 device operates from –40°C to +125°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
INA220-Q1 | VSSOP (10) | 3.00 mm × 3.00 mm |
Changes from A Revision (June 2012) to B Revision
Changes from * Revision (June 2012) to A Revision
PART NUMBER | DESCRIPTION |
---|---|
INA212-Q1 | Automotive, 26-V, Bi-Directional, Zero-Drift, Precision, Low-/High-Side, Volt. Out Current Sense Amp |
INA225-Q1 | Automotive, 36-V Prog. Gain, Bi-Directional, Zero-Drift, High-Speed Voltage Out Current Sense Amp |
INA226-Q1 | Automotive, 36-V, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/ Alert |
INA282-Q1 | Automotive, 80-V, Bi-Directional, High Accuracy, Low-/High-Side, Voltage Out Current Shunt Monitor |
INA300-Q1 | Automotive, 36-V Low-/High-Side, Overcurrent Protection Comparator |
INA3221-Q1 | Automotive 26-V, Triple, Bi-Directional, Zero-Drift, I2C Out Current/Voltage Monitor w/ Alerts |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | A1 | Digital Input | Address pin. Connect to GND, SCL, SDA, or VS. Table 1 shows pin settings and corresponding addresses. |
2 | A0 | Digital Input | Address pin. Connect to GND, SCL, SDA, or VS. Table 1 shows pin settings and corresponding addresses. |
3 | NC | — | No internal connection |
4 | SDA | Digital I/O | Serial bus data line |
5 | SCL | Digital Input | Serial bus clock line |
6 | VS | Analog | Power supply, 3 V to 5.5 V |
7 | GND | Analog | Ground |
8 | VBUS | Analog Input | Bus voltage input |
9 | IN– | Analog Input | Negative differential shunt voltage. Connect to negative side of shunt resistor. Bus voltage is measured from this pin to ground. |
10 | IN+ | Analog Input | Positive differential shunt voltage. Connect to positive side of shunt resistor. |