Overview
The INA223AIDSKR, produced by Texas Instruments, is a highly versatile and programmable current sense amplifier and analog power monitor. This device is designed to monitor the current, bus voltage, and power of a supply line by sensing the voltage drop across a shunt resistor. It operates over a wide common-mode voltage range of 0 V to 26 V, independent of the supply voltage. The INA223AIDSKR features a Zerø-Drift architecture, which enables accurate current sensing with minimal offset, allowing for shunt voltage drops as low as 10 mV. The device is powered by a single supply voltage ranging from +2.7 V to +5.5 V and draws a maximum supply current of 250 µA. It is specified over an extended temperature range of –40°C to +105°C and is available in an SON-10 package.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage | +2.7 | +5.5 | V | |
| Common-Mode Input Range | 0 | 26 | V | |
| Quiescent Current | 200 | 250 | µA | |
| Shutdown Current | 0.1 | 1 | µA | |
| Operating Temperature Range | –40 | +105 | °C | |
| Current Shunt Voltage Gains | 20, 128, 300 | V/V | ||
| Bus Voltage Attenuations | 1/10, 1/5, 2/5 | |||
| Shunt Offset Voltage (RTI) | ±75 | ±300 | µV | |
| Power Measurement Error | ±0.35 | ±1.5 | %FSR |
Key Features
- Programmable Gains and Attenuations: The INA223AIDSKR allows for multiple gain and attenuation settings through a two-wire interface, enabling application-specific configurations and a wider dynamic current load range without needing to switch the sensing element.
- Wide Common-Mode Range: Operates over a common-mode voltage range of 0 V to 26 V, independent of the supply voltage.
- Low Offset and High Accuracy: Features a Zerø-Drift architecture with low offset (±100 µV max) and high accuracy (±0.25% shunt voltage gain error max, ±0.15% bus voltage gain error max, and ±1.25% power error max).
- Shutdown Feature: Includes a shutdown feature to disable the device, reducing power consumption to 1 µA max.
- Temperature Range: Specified over an extended temperature range of –40°C to +105°C.
- Instantaneous Power Measurement: Incorporates an analog multiplier to provide instantaneous power measurement.
Applications
- Notebook Computers: Ideal for monitoring power consumption and current in portable computing devices.
- Cell Phones: Used in mobile devices to manage power and current efficiently.
- Telecom Equipment: Suitable for monitoring and managing power in telecommunications hardware.
- Power Management Systems: Utilized in various power management applications to monitor and control current and voltage.
Q & A
- What is the common-mode voltage range of the INA223AIDSKR?
The INA223AIDSKR operates over a common-mode voltage range of 0 V to 26 V, independent of the supply voltage.
- What are the programmable gain settings for the INA223AIDSKR?
The device offers programmable current shunt voltage gains of 20 V/V, 128 V/V, and 300 V/V, along with bus voltage attenuations of 1/10, 1/5, and 2/5.
- What is the supply voltage range for the INA223AIDSKR?
The INA223AIDSKR is powered by a single supply voltage ranging from +2.7 V to +5.5 V.
- What is the maximum quiescent current of the INA223AIDSKR?
The maximum quiescent current is 250 µA.
- Does the INA223AIDSKR have a shutdown feature?
Yes, the device includes a shutdown feature to reduce power consumption to 1 µA max when disabled.
- What is the operating temperature range of the INA223AIDSKR?
The device is specified over an extended temperature range of –40°C to +105°C.
- How does the INA223AIDSKR measure instantaneous power?
The device incorporates an analog multiplier to provide instantaneous power measurement.
- What package type is the INA223AIDSKR available in?
The INA223AIDSKR is available in an SON-10 package.
- What are some typical applications of the INA223AIDSKR?
Typical applications include notebook computers, cell phones, telecom equipment, and power management systems.
- How does the two-wire interface work on the INA223AIDSKR?
The two-wire interface allows for adjusting the configuration settings of the device, including selecting the signal to be directed to the output and setting gain and attenuation factors.
