Texas Instruments INA180B4IDBVT

Overview

INA180B4IDBVT from Texas Instruments is a single-channel, high-side/low-side current-sense amplifier with 200 V/V fixed gain, –0.2 V to +26 V common-mode input range, 105 kHz bandwidth, ±500 µV max offset at 12 V VCM, and 2 V/µs slew rate-used for precision overcurrent detection in motor control and battery monitoring systems.

For engineers reviewing the INA180B4IDBVT datasheet, INA180B4IDBVT pinout, INA180B4IDBVT application, or INA180B4IDBVT equivalent, this page delivers verified electrical specs, SOT-23 pin configuration B, thermal performance data, real-world use cases, and two validated alternative parts with documented functional differences.

Technical Context

The INA180B4IDBVT implements a precision current-shunt monitor architecture with an integrated matched resistor gain network optimized for 200 V/V operation, enabling accurate RTI voltage output proportional to sensed differential current across R_SENSE. Its rail-to-rail output stage supports 2.7–5.5 V supply while maintaining stable operation up to 125°C ambient.

It operates in both high-side (IN+ connected to bus, IN− to load) and low-side (IN+ to load, IN− to ground) configurations without phase reversal, with CMRR ≥84 dB and PSRR ≥±40 µV/V across –40°C to +125°C-ensuring robustness against bus transients and supply noise in industrial power stages.

Key Specifications

Pinout & Package

The INA180B4IDBVT is housed in a 5-pin SOT-23 package (DBV), 2.90 mm × 1.60 mm body size, with Pinout B configuration. Thermal resistance R_θJA is 197.1°C/W, requiring minimal PCB copper for standard industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA180B4IDBVT, INA180A4IDBVT offers identical sensing performance but requires pinout-aware layout adaptation, while INA240A1EDRGT trades fixed-gain simplicity for broader voltage range and programmability-making it suitable only when VCM exceeds 26 V or gain reconfiguration is needed.

Availability

INA180B4IDBVT is available at Aetrix Electronics and suitable for motor control, battery monitoring, and solar inverter applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for INA180B4IDBVT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The INA180 family targets cost-optimized, high-accuracy current sensing in space-constrained applications-designed specifically for reliable operation in motor drives, power supplies, and battery systems where precision, wide VCM, and low IQ are essential.

FAQ

What is the exact gain setting of the INA180B4IDBVT?

The INA180B4IDBVT has a fixed gain of 200 V/V, as designated by the "B4" suffix in its part number. This gain is implemented using an internal matched resistor network, eliminating the need for external gain-setting components and ensuring ±1% maximum gain error across temperature. The 200 V/V ratio scales small differential voltages across a current-sense resistor into a robust analog output compatible with standard ADC inputs. This value is confirmed in Table 5-1 and Section 7.5 of the SBOS741H datasheet.

Does the INA180B4IDBVT support high-side current sensing?

Yes, the INA180B4IDBVT supports high-side current sensing with a common-mode input range of –0.2 V to +26 V-enabling direct connection to 24-V bus rails while operating from a lower 3.3-V or 5-V supply. In high-side configuration, IN+ connects to the bus side and IN− to the load side of the sense resistor. Its architecture prevents phase reversal under overload, and its 84 dB CMRR suppresses noise from switching nodes. This capability is explicitly validated in the Typical Application Circuit and Section 8.1 of the official datasheet.

What is the maximum operating temperature for the INA180B4IDBVT?

The INA180B4IDBVT is specified for continuous operation from –40°C to +125°C ambient temperature, qualifying it for under-hood automotive, industrial motor drives, and outdoor solar inverter applications. Junction temperature remains within safe limits under typical PCB layouts due to its 197.1°C/W junction-to-ambient thermal resistance in the SOT-23 (DBV) package. Derating curves in Figure 7-23 confirm stable quiescent current performance across this full range, and all electrical specifications-including offset, gain error, and bandwidth-are guaranteed over this interval.

How does the pinout of INA180B4IDBVT differ from INA180A4IDBVT?

The INA180B4IDBVT uses Pinout B (IN+ on pin 1, GND on pin 2, IN− on pin 3, OUT on pin 4, VS on pin 5), whereas INA180A4IDBVT uses Pinout A (OUT on pin 1, GND on pin 2, IN+ on pin 3, IN− on pin 4, VS on pin 5). This difference is defined in Figures 6-1 and 6-2 of the SBOS741H datasheet and affects PCB layout compatibility. Both share identical electrical performance, gain, and package dimensions-but swapping them without layout revision will result in miswired inputs and nonfunctional operation. Always verify pin mapping before substitution.

What is the output voltage swing capability of the INA180B4IDBVT?

The INA180B4IDBVT features a rail-to-rail output stage with a minimum swing of (VGND) + 0.0005 V and (VS) – 0.03 V under 10-kΩ load conditions across –40°C to +125°C. This allows >4.97 V output headroom with a 5-V supply and >0.0005 V above ground-sufficient to drive most 12-bit SAR or delta-sigma ADCs without level-shifting. Output impedance remains below 1 Ω at DC and rises to ~20 Ω at 100 kHz (Figure 7-37), supporting stable driving of modest capacitive loads. These values are measured per Section 7.5 and validated in Figure 7-19.