Model No: INA168QDBVRQ1
Texas Instruments INA168QDBVRQ1
Manufacturer: Texas Instruments
SEMICON NO.: INA168QDBVRQ1
Package: SOT-23-5
Stock: In stock
Description: High-Side Current Shunt Monitor
SEMICON NO.: INA168QDBVRQ1
Package: SOT-23-5
Stock: In stock
Description: High-Side Current Shunt Monitor
Quantity :
| Mfr | Texas Instruments |
| Device Type | High-Side Unidirectional Current Shunt Monitor |
| Function | Current Monitor |
| Sensing Method | High-Side |
| Common-Mode Input Voltage Range | 2.7 V to 60 V |
| Full-Scale Sense Voltage | 100 mV to 500 mV |
| Differential Input Voltage | ±40 V |
| Input Offset Voltage | ±0.2 mV (Typ) / ±2 mV (Max) |
| Offset Voltage vs Temperature | 1 µV/°C |
| Input Bias Current | 10 µA (Typ) |
| Output Type | Current Output |
| Output Current (Max) | 400 µA |
| Operating Temperature | –40°C to +125°C |
| Package | SOT-23-5 |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
The INA168QDBVRQ1 is an automotive-qualified, high-side, unidirectional current shunt monitor from Texas Instruments, featuring a current-output architecture with wide input common-mode voltage range up to 60V. Operating across a -40°C to +125°C ambient temperature range, this device measures differential voltage across a shunt resistor and converts it to an output current with a precise 1/5kΩ transconductance ratio, which is then converted back to a voltage using an external load resistor, allowing flexible gain settings from 1 to over 100. The INA168-Q1 features independent supply and input common-mode voltages (2.7V to 36V supply, 2.7V to 60V common-mode), low 25µA quiescent current, and single-resistor gain setting, making it ideal for power-critical automotive and industrial applications requiring high-side current monitoring without interrupting the ground plane.
FAQ
Q: What distinguishes the INA168-Q1 from the INA138-Q1?
A: The INA168-Q1 supports common-mode voltages up to 60V versus 36V for the INA138-Q1, while both share identical supply ranges, output architecture, and package options.
Q: How does the current output work?
A: The device converts the differential shunt voltage to an output current using the internal 5kΩ transconductance ratio; an external load resistor then converts this current back to a ground-referenced output voltage.
Q: What gain range can be achieved?
A: The external load resistor allows gain settings from 1 to over 100, with higher gains achieved using larger load resistor values.
Alternative Current Measurement Models
1. INA138QDBVRQ1 (Texas Instruments): The pin-compatible 36V common-mode version offering identical architecture and performance for lower-voltage automotive applications.
2. INA168NA/250G4 (Texas Instruments): The non-automotive industrial-grade version with equivalent 60V common-mode capability in SOT-23-5 package for cost-sensitive designs.
3. MAX4172 (Analog Devices/Maxim): A low-cost precision high-side current-sense amplifier with similar architecture for portable and battery-powered system monitoring.
4. LT6106 (Analog Devices): A versatile rail-to-rail input current sense amplifier providing alternative gain configurations for industrial applications.
FAQ
Q: What distinguishes the INA168-Q1 from the INA138-Q1?
A: The INA168-Q1 supports common-mode voltages up to 60V versus 36V for the INA138-Q1, while both share identical supply ranges, output architecture, and package options.
Q: How does the current output work?
A: The device converts the differential shunt voltage to an output current using the internal 5kΩ transconductance ratio; an external load resistor then converts this current back to a ground-referenced output voltage.
Q: What gain range can be achieved?
A: The external load resistor allows gain settings from 1 to over 100, with higher gains achieved using larger load resistor values.
Alternative Current Measurement Models
1. INA138QDBVRQ1 (Texas Instruments): The pin-compatible 36V common-mode version offering identical architecture and performance for lower-voltage automotive applications.
2. INA168NA/250G4 (Texas Instruments): The non-automotive industrial-grade version with equivalent 60V common-mode capability in SOT-23-5 package for cost-sensitive designs.
3. MAX4172 (Analog Devices/Maxim): A low-cost precision high-side current-sense amplifier with similar architecture for portable and battery-powered system monitoring.
4. LT6106 (Analog Devices): A versatile rail-to-rail input current sense amplifier providing alternative gain configurations for industrial applications.
