Overview
The INA169NA/250G4, produced by Texas Instruments, is a high-side, unipolar current shunt monitor. This device is part of the INA1x9 family, which includes the INA139 and INA169. The INA169 is designed for high-voltage applications, offering a wide input common-mode voltage range and high-speed operation. It is ideal for measuring small differential voltages across a shunt resistor in the presence of large common-mode voltages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 60 | V |
| Common-Mode Input Range | 2.7 to 60 | V |
| Differential Input Voltage Range | -40 to 2 | V |
| Quiescent Current | 60 to 125 | µA |
| Operating Temperature Range | -40 to +85 | °C |
| Package Type | 5-pin SOT-23 | |
| Bandwidth (ROUT = 10 kΩ) | 440 kHz | |
| Settling Time (0.1%, ROUT = 10 kΩ) | 2.5 µs | |
| Output Current Noise Density | 20 pA/√Hz | |
| Total Output Current Noise (BW = 100 kHz) | 7 nA RMS |
Key Features
- Complete Unipolar High-Side Current Measurement Circuit: The INA169 provides a complete solution for high-side current measurement.
- Wide Supply and Common-Mode Range: Operates with supply voltages from 2.7 V to 60 V and common-mode voltages up to 60 V.
- Independent Supply and Input Common-Mode Voltages: The input voltages can exceed the power supply voltage.
- Single Resistor Gain Set: Gain is easily set using a single external resistor.
- Low Quiescent Current: Typical quiescent current of 60 µA.
- High Accuracy and Linearity: Low offset voltage and high common-mode rejection ratio (CMRR) ensure accurate measurements.
Applications
- Current Measurement in High-Voltage Systems: Ideal for measuring current in systems with high common-mode voltages.
- Automotive and Industrial Systems: Suitable for use in automotive and industrial applications where high reliability and accuracy are required.
- Power Supplies and Battery Management: Used in power supply monitoring and battery management systems to measure current accurately.
- Bipolar Current Measurement: Can be configured for bi-directional current measurement using two INA169 devices and a comparator.
Q & A
- What is the supply voltage range of the INA169?
The INA169 operates with supply voltages from 2.7 V to 60 V.
- What is the common-mode input range of the INA169?
The common-mode input range is from 2.7 V to 60 V.
- What is the typical quiescent current of the INA169?
The typical quiescent current is 60 µA).
- What is the operating temperature range of the INA169?
The operating temperature range is from -40°C to +85°C).
- What package type is the INA169 available in?
The INA169 is available in a 5-pin SOT-23 package).
- How is the gain set in the INA169?
The gain is set using a single external resistor).
- What is the bandwidth of the INA169 when ROUT = 10 kΩ?
The bandwidth is 440 kHz when ROUT = 10 kΩ).
- What is the settling time of the INA169 for a 5-V step with ROUT = 10 kΩ?
The settling time is 2.5 µs for a 5-V step with ROUT = 10 kΩ).
- Can the INA169 be used for bi-directional current measurement?
Yes, it can be configured for bi-directional current measurement using two INA169 devices and a comparator).
- Is the INA169NA/250G4 still in production?
No, the INA169NA/250G4 is obsolete and no longer manufactured).
