Texas Instruments INA500AIDBVR

Overview

INA500AIDBVR from Texas Instruments is a precision difference amplifier optimized for low-power, space-constrained battery monitoring and level-translation applications. It delivers G = 1 fixed gain, >1 MΩ input impedance (R_IN-CM = 1.08 MΩ), ±0.70 mV typical offset voltage (referred to output), 87 dB typical CMRR, and 125 kHz bandwidth - enabling direct interface with 8-bit to 12-bit ADCs in EV charging power modules and battery energy storage systems.

For engineers reviewing the INA500AIDBVR datasheet, INA500AIDBVR pinout, INA500AIDBVR application, or INA500AIDBVR equivalent, key selection criteria include its ultra-low 13.5 µA quiescent current, rail-to-rail input common-mode range up to ±13.75 V (at G = 0.25), 6-pin SOT-23 package compatibility, and integrated matched resistor network eliminating external precision resistor requirements.

Technical Context

The INA500AIDBVR implements a fully integrated difference amplifier topology with laser-trimmed thin-film resistors on-die, achieving ±0.01% typical gain error and 75 dB minimum DC CMRR across –40°C to 125°C. Its input stage supports dual-supply operation (±0.85 V to ±2.75 V) or single-supply (1.7 V to 5.5 V), with reference input (REF) accepting externally set common-mode levels.

Unlike discrete op-amp + resistor solutions, the device embeds matched R_IN networks (1.08 MΩ for INA500A) and internal feedback paths, delivering stable gain accuracy without layout-sensitive external components. Output drive capability includes 200 pF capacitive load support with <20% overshoot and ±33 mA short-circuit current.

Key Specifications

Pinout & Package

INA500AIDBVR is packaged in a 6-pin SOT-23 (DBV) footprint measuring 2.9 mm × 2.8 mm, optimized for automated assembly and thermal performance in compact power modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA199A1IDBVR and AD8271ARMZ-R7, the INA500AIDBVR uniquely combines sub-15 µA quiescent current, >1 MΩ input impedance, and monolithic matched resistors - making it the only option qualified for continuous, high-accuracy voltage monitoring in space- and power-constrained BESS and portable test equipment.

Availability

INA500AIDBVR is available at Aetrix Electronics and suitable for battery energy storage systems, EV charging infrastructure, and industrial AC-DC power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for INA500AIDBVR 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 amplifiers and power management ICs.

The INA500 product line targets cost-sensitive, size-constrained voltage monitoring applications - delivering integrated resistor networks, ultra-low IQ, and extended temperature operation for battery management and industrial power systems.

FAQ

What is the maximum input common-mode voltage supported by the INA500AIDBVR?

The INA500AIDBVR supports an input common-mode voltage range of 2×(V–) – V_REF to 2×(V+) – V_REF – 1.4 V in G = 1 configuration. With V_REF = V_S/2 and V_S = 5.5 V, this yields –2.75 V to +4.0 V. At G = 0.25 (not applicable to INA500AIDBVR), the range extends to ±13.75 V - but the INA500AIDBVR itself is rated for up to ±2.75 V common-mode with 5.5 V supply.

Can the INA500AIDBVR operate from a single 1.8 V supply?

Yes, the INA500AIDBVR is fully specified from 1.7 V to 5.5 V single-supply operation. At 1.8 V, it maintains >1 MΩ input impedance, 125 kHz bandwidth, and 13.5 µA typical quiescent current. The output swing remains rail-to-rail within 15 mV of each supply rail, enabling direct interfacing with 1.8 V logic and ADCs.

Does the INA500AIDBVR require external resistors for gain setting?

No. The INA500AIDBVR integrates precision-matched thin-film resistors internally - including the 1.08 MΩ input network specific to the INA500A version. This eliminates all external gain-setting components, reduces PCB area by ~3 mm² per channel, and guarantees ±0.01% typical gain error without calibration.

How does the REF pin function in the INA500AIDBVR?

The REF pin sets the output common-mode voltage level. With gain = 1, the output equals (IN+ – IN–) + V_REF. It accepts any DC voltage between V– and V+, including mid-supply (V_S/2), ground, or external bias. No current flows into REF, and its gain to output is exactly 1 V/V with ±0.005% typical error.

Is the INA500AIDBVR pin-compatible with other versions like INA500BIDBVR or INA500CIDBVR?

Yes - all INA500 variants (A/B/C) share identical 6-pin SOT-23 (DBV) pinout, package dimensions, and electrical interface. The only functional difference is gain: INA500AIDBVR = G = 1, INA500BIDBVR = G = 0.5, INA500CIDBVR = G = 0.25. Swapping versions requires only schematic update; no PCB redesign is needed.