Texas Instruments INA500BIDBVR

Overview

INA500BIDBVR from Texas Instruments is a precision difference amplifier optimized for low-power, space-constrained battery monitoring and level-translation applications. It delivers G = 0.5 fixed gain, >1 MΩ input impedance (R_IN-CM = 1080 kΩ, R_IN-DM = 2880 kΩ), ±0.003% typical gain error, ±0.50 mV typical offset voltage (referred to output), and 13.5 µA typical quiescent current across 1.7 V to 5.5 V supply. It operates from –40°C to 125°C in SOT-23-6 packaging.

For engineers reviewing the INA500BIDBVR datasheet, INA500BIDBVR pinout, INA500BIDBVR application, or INA500BIDBVR equivalent, key selection criteria include its ultra-high common-mode input range (up to 3×V_– – 2×V_REF), rail-to-rail output swing with <25 mV headroom, 135 kHz bandwidth, and integrated matched resistor network eliminating external precision components.

Technical Context

The INA500BIDBVR implements a fully integrated difference amplifier architecture with laser-trimmed thin-film resistors enabling precise G = 0.5 gain without external components. Its input stage achieves >1 MΩ common-mode and differential input resistance while maintaining 77 dB minimum DC CMRR over temperature and supply voltage variation.

It features a single-supply or dual-supply operational range (±0.85 V to ±2.75 V), reference input (REF) with unity gain to output, and output drive capability of 120 pF load with <20% overshoot - supporting direct interface to low-speed 8-bit to 12-bit ADCs in energy-constrained systems.

Key Specifications

Pinout & Package

SOT-23-6 package (2.9 mm × 2.8 mm), surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar difference amplifier applications.

Compared with INA199A2IDBVR and INA2191A3IDBVR, the INA500BIDBVR provides optimal trade-off between ultra-low IQ, G = 0.5 scaling, and 1.7–5.5 V supply flexibility - making it uniquely suitable for compact, battery-powered voltage monitoring where gain, size, and power are co-constrained.

Availability

INA500BIDBVR is available at Aetrix Electronics and suitable for battery energy storage systems, EV charging station power modules, and industrial AC-DC power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for INA500BIDBVR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The INA500 family is designed for cost-sensitive, space-constrained voltage sensing in battery management, power conversion, and portable instrumentation - emphasizing integrated precision, ultra-low power, and simplified layout.

FAQ

What is the maximum input common-mode voltage supported by the INA500BIDBVR?

The INA500BIDBVR supports an input common-mode voltage range up to 3×V_– – 2×V_REF when configured for G = 0.5. With V_REF = V_MID and ±2.75 V supplies, this enables operation with up to ±13.75 V common-mode input - sufficient for direct interfacing to 27.5 V battery strings. This specification is confirmed in Section 6.6 of the INA500B datasheet under "Input Common-Mode Range".

Does the INA500BIDBVR require external resistors to set gain?

No, the INA500BIDBVR does not require external resistors to set gain. It integrates precision laser-trimmed thin-film resistors to deliver a fixed G = 0.5 gain. This eliminates tolerance errors, thermal drift mismatches, and PCB layout complexity associated with discrete resistor networks - a core design feature confirmed in the "Description" and "Features" sections of the INA500 datasheet.

Can the INA500BIDBVR operate from a single 1.8 V supply?

Yes, the INA500BIDBVR is fully specified to operate from a single 1.8 V supply (within the 1.7 V to 5.5 V range). At 1.8 V, it maintains 13.5 µA typical quiescent current and retains functional performance including G = 0.5 gain accuracy, >1 MΩ input impedance, and rail-to-rail output swing - verified in Section 6.6 Electrical Characteristics and Figure 6-17 (Quiescent Current vs Temperature).

What is the output drive capability of the INA500BIDBVR?

The INA500BIDBVR drives up to 120 pF capacitive load with <20% overshoot, as specified in Section 6.6 under "CL Drive". This allows direct connection to RC filters or ADC input capacitors without external buffering. The closed-loop output impedance is 165 Ω at 10 kHz, and short-circuit current is ±35 mA - enabling robust interfacing to standard SAR and delta-sigma ADCs in industrial and automotive applications.

How does the REF pin function in the INA500BIDBVR?

The REF pin in the INA500BIDBVR sets the output common-mode voltage with unity gain (REF-to-OUT gain = 1 V/V). It accepts any voltage within the supply rails (V_– to V₊) and is internally buffered. When tied to V_MID = (V₊ + V_–)/2, it centers the output for bipolar signal handling; when tied to ground, it enables single-supply unipolar operation - behavior confirmed in Sections 5 and 6.6 of the INA500B datasheet.