Overview
The INA216A2RSWR from Texas Instruments is a high-precision, low-power current shunt monitor. This device is part of the INA216 series, which features a Zerø-Drift architecture, enabling accurate current sensing with minimal voltage drops across the shunt. The INA216A2RSWR operates from a single power supply ranging from +1.8V to +5.5V and draws a maximum of 25μA of supply current. It is designed for applications requiring high accuracy and low power consumption.
Key Specifications
| Parameter | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage | +1.8 | +5.5 | V | ||
| Differential Input Voltage (VIN+ - VIN-) | -5.5 | +5.5 | V | ||
| Common-Mode Input Range | 1.8 | 5.5 | V | ||
| Gain (INA216A2) | 50 | 50 | V/V | ||
| Gain Error | VOUT = 0.2V to VOUT = 2.5V | ±0.05% | ±0.2% | % | |
| Offset Voltage, RTI | ±20 | ±75 | μV | ||
| Common-Mode Rejection Ratio (CMRR) | VIN+ = +1.8V to +5.5V | 90 | 108 | dB | |
| Quiescent Current | 13 | 25 | μA | ||
| Operating Temperature Range | -40 | +125 | °C | ||
| Bandwidth (CLOAD = 10pF) | 10 | 10 | kHz |
Key Features
- Low Offset and Gain Error: The INA216A2RSWR features a Zerø-Drift architecture, providing low offset voltage and gain error, ensuring high accuracy in current sensing.
- High Common-Mode Rejection Ratio (CMRR): With a CMRR of 90 dB to 108 dB, this device offers excellent rejection of common-mode signals.
- Low Power Consumption: The device operates with a quiescent current of 13 μA to 25 μA, making it suitable for power-sensitive applications.
- Wide Operating Temperature Range: Specified over the temperature range of –40°C to +125°C, this device is robust and reliable in various environmental conditions.
- Buffered Voltage Output: No additional op-amp is needed, as the device provides a buffered voltage output.
- Compact Package: Available in a chip-scale package, such as the ThinQFN-10, making it ideal for space-constrained designs.
Applications
- Notebook Computers: For accurate current monitoring in power management systems.
- Cell Phones: In battery management and power monitoring circuits.
- Telecom Equipment: For monitoring current in various telecom applications.
- Power Management: In power supplies, battery chargers, and other power management systems.
- Battery Chargers: To monitor and control charging currents accurately.
Q & A
- What is the operating voltage range of the INA216A2RSWR?
The INA216A2RSWR operates from a single power supply ranging from +1.8V to +5.5V.
- What is the gain of the INA216A2RSWR?
The gain of the INA216A2RSWR is 50 V/V.
- What is the typical quiescent current of the INA216A2RSWR?
The typical quiescent current is 13 μA.
- What is the common-mode rejection ratio (CMRR) of the INA216A2RSWR?
The CMRR is 90 dB to 108 dB.
- What is the bandwidth of the INA216A2RSWR with a 10pF load?
The bandwidth is 10 kHz.
- Can the INA216A2RSWR be used in low-side current shunt monitoring?
No, the INA216A2RSWR cannot be used as a low-side current shunt monitor due to its limited common-mode input range starting at 1.8V.
- How does the INA216A2RSWR handle transients above 5.5V?
The INA216A2RSWR can handle transients above 5.5V with the use of zener diode or zener-type transient absorbers and additional circuitry.
- What is the typical offset voltage of the INA216A2RSWR?
The typical offset voltage is ±20 μV to ±75 μV.
- What is the operating temperature range of the INA216A2RSWR?
The operating temperature range is –40°C to +125°C.
- What package options are available for the INA216A2RSWR?
The device is available in packages such as the ThinQFN-10.
