Texas Instruments INA195AIDBVT

Overview

INA195AIDBVT from Texas Instruments is a high-voltage current shunt monitor IC designed for bidirectional sensing across shunt resistors in power rails with common-mode voltages from −16 V to +80 V. It delivers 100 V/V fixed gain, 200 kHz bandwidth, ±3% total output error over temperature (−40°C to +125°C), and operates from a single 2.7-V to 18-V supply drawing ≤900 μA - enabling precise current measurement in automotive battery monitoring and telecom power supplies.

For engineers reviewing the INA195AIDBVT datasheet, INA195AIDBVT pinout, INA195AIDBVT application, or INA195AIDBVT equivalent, this page provides verified functional identity, SOT-23 package mapping, confirmed pin roles, real-world accuracy behavior across V_CM and V_SENSE, and validated alternative options for 100 V/V high-side/low-side current sensing.

Technical Context

The INA195AIDBVT uses a patented dual-amplifier front-end architecture: amplifier A1 activates under negative common-mode conditions (−16 V ≤ V_CM < 0 V), while A2 dominates at positive V_CM ≥ V_S. This enables rail-to-rail common-mode operation without matched resistor networks.

Its internal 5-kΩ ±30% input impedance interacts with external filtering components, requiring careful RC design to limit gain error to ≤2.2%. Output stage is optimized for sourcing current (≥10 mA typical), with sinking capability limited to ~400 μA - critical for interfacing with ADCs or comparators without level-shifting.

Key Specifications

Pinout & Package

SOT-23 (DBV) package, 5-pin, body size 2.90 mm × 1.60 mm, thermal resistance R_θJA = 221.7°C/W - suitable for space-constrained PCB layouts with moderate power dissipation (<15 mW).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current shunt monitoring applications.

Compared with INA195AIDBVT, INA240A1IDR offers higher speed and improved thermal stability at the cost of larger SOIC-8 packaging and higher supply current, while MAX4080TASA+ achieves ultra-low IQ but trades off common-mode rejection and bandwidth - making INA195AIDBVT optimal for cost-sensitive, space-constrained 200-kHz current loops in automotive and telecom.

Availability

INA195AIDBVT is available at Aetrix Electronics and suitable for automotive battery management, telecom power supervision, industrial motor drive protection, and lithium-ion battery charger designs requiring stable component supply and long-term manufacturability.

Supply support for INA195AIDBVT 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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.

The INA19x family was engineered specifically for high-voltage current sensing in automotive, industrial, and communications infrastructure - delivering wide common-mode range, fixed-gain simplicity, and robust thermal performance in miniature SOT-23 packages.

FAQ

What is the maximum common-mode voltage the INA195AIDBVT can handle?

The INA195AIDBVT supports a common-mode input voltage range of −16 V to +80 V, independent of its supply voltage (2.7 V to 18 V). This allows direct connection to high-side or low-side shunts in systems like 48-V telecom rails or negative-ground automotive batteries without level-shifting circuitry. Operation at the extremes requires verification of output swing and error specifications per the datasheet's Normal Case 1 and Low VSENSE regions.

Does the INA195AIDBVT require external gain-setting resistors?

No, the INA195AIDBVT has a factory-trimmed fixed gain of 100 V/V. Unlike programmable current sense amplifiers, it does not require external resistors to set gain - reducing component count, PCB area, and layout sensitivity. This simplifies design for applications needing consistent 100× scaling, such as interfacing with 100-mV full-scale ADC inputs.

What is the bandwidth of the INA195AIDBVT and how does it affect current control loops?

The INA195AIDBVT has a −3-dB bandwidth of 200 kHz. This supports stable closed-loop current control in switch-mode power supplies operating up to 50 kHz switching frequency, providing adequate phase margin (>40°) for PID compensation. Bandwidth is gain-dependent: INA193/INA196 (20 V/V) offer 500 kHz, while INA194/INA197 (50 V/V) deliver 300 kHz - confirming INA195AIDBVT's 200 kHz is inherent to its 100 V/V architecture.

Can the INA195AIDBVT accurately measure near-zero current (VSENSE < 20 mV)?

Accuracy degrades significantly when V_SENSE < 20 mV. In Low VSENSE Case 2 (0 V ≤ V_CM ≤ V_S), output deviation peaks unpredictably - tested up to 2 V for INA195AIDBVT at V_SENSE = 0 mV. For reliable sub-20-mV sensing, use Normal Case operation (V_SENSE ≥ 20 mV) or select a device with guaranteed zero-drift architecture like INA240.

What package type and thermal characteristics does the INA195AIDBVT have?

The INA195AIDBVT is supplied in a 5-pin SOT-23 (DBV) package with nominal dimensions 2.90 mm × 1.60 mm. Its junction-to-ambient thermal resistance (R_θJA) is 221.7°C/W. At 900 μA quiescent current and 12-V supply, power dissipation remains <11 mW - keeping junction temperature rise below 2.5°C in still air, eliminating need for thermal relief pads in most layouts.