Texas Instruments INA500AIDCKR

Overview

INA500AIDCKR from Texas Instruments is a precision difference amplifier optimized for low-power, small-size, and cost-sensitive battery monitoring and level-translation applications. It delivers G = 1 fixed gain, >1 MΩ input impedance, ±0.70 mV typical offset voltage (referred to output), 87 dB typical CMRR, and 125 kHz bandwidth while operating from 1.7 V to 5.5 V supply. It is used in battery cell formation equipment and EV charging station power modules where high common-mode rejection and rail-to-rail input capability are critical.

For engineers reviewing the INA500AIDCKR datasheet, INA500AIDCKR pinout, INA500AIDCKR application, or INA500AIDCKR equivalent, this page provides verified technical context, package-specific pin functions, real-world use-value analysis for battery sensing, and validated alternative options with documented functional trade-offs.

Technical Context

The INA500AIDCKR integrates matched thin-film resistors and an op-amp in a monolithic IC to form a fully specified difference amplifier with fixed G = 1 gain. Its internal resistor network enables >1 MΩ differential input impedance and supports input common-mode voltages up to ±13.75 V (at 5.5 V supply) in G = 0.25 configuration-though INA500A operates at G = 1 with 2×(V–) – VREF to 2×(V+) – VREF input range.

It achieves 75 dB minimum DC CMRR and ±0.05% maximum gain error across –40°C to 125°C, with 13.5 µA typical quiescent current enabling multi-year operation in energy-constrained systems. The device drives 200 pF loads with <20% overshoot and features 100 dB EMI rejection at 1 GHz.

Key Specifications

Pinout & Package

The INA500AIDCKR is packaged in a 6-pin SC70 (DCK) package measuring 2.1 mm × 1.25 mm, with 0.65 mm pitch and exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA199A1IDBVR and AD8479ARZ-R7, the INA500AIDCKR uniquely balances ultra-low power (13.5 µA), compact SC70 packaging, and >1 MΩ input impedance-making it optimal for space- and energy-constrained battery voltage monitoring where precision and size outweigh raw bandwidth or extreme voltage range.

Availability

INA500AIDCKR is available at Aetrix Electronics and suitable for battery energy storage systems, wearable fitness monitors, and EV charging station power modules requiring stable component supply and long-term manufacturability.

Supply support for INA500AIDCKR 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers and power management ICs.

The INA500 product line targets cost- and size-constrained battery monitoring and level-translation applications, delivering integrated resistor-matched difference amplifiers with ultra-low quiescent current and wide supply flexibility.

FAQ

What is the guaranteed minimum CMRR for INA500AIDCKR across temperature?

The INA500AIDCKR guarantees ≥75 dB DC CMRR over the full –40°C to 125°C operating temperature range, measured in the high-CMRR region (VCM = [2×(V–) – VREF] to [2×(V+) – VREF – 1.4 V]) at VS = 5.5 V and VREF = VS / 2. This ensures robust rejection of common-mode noise in automotive and industrial battery monitoring environments where ambient temperature swings are extreme.

Can INA500AIDCKR operate from a single 1.8 V supply?

Yes, the INA500AIDCKR supports single-supply operation from 1.7 V to 5.5 V. At 1.8 V, it maintains full functionality including 125 kHz bandwidth, >1 MΩ input impedance, and ±0.05% max gain error. Quiescent current rises slightly to ~14.5 µA, preserving multi-year battery life in ultra-low-power designs using the INA500AIDCKR.

Does INA500AIDCKR require external gain-setting resistors?

No, the INA500AIDCKR does not require external gain-setting resistors. It integrates precision-matched thin-film resistors internally to deliver fixed G = 1 gain. This eliminates resistor tolerance errors, layout-induced mismatch, and board space typically consumed by 0.1% external components-directly enabling the "cost and size optimized" design goal stated in the INA500AIDCKR datasheet.

What is the maximum input common-mode voltage for INA500AIDCKR at 5.5 V supply?

At VS = 5.5 V (V+ = 2.75 V, V– = –2.75 V), the INA500AIDCKR supports an input common-mode range of 2×(V–) – VREF to 2×(V+) – VREF, i.e., –2.75 V to +2.75 V when VREF = 0 V. With VREF = VS / 2 = 2.75 V, the usable range extends to –2.75 V to +2.75 V relative to VREF, enabling direct sensing of battery nodes near supply rails without external level shifting.

Is INA500AIDCKR pin-compatible with other versions like INA500BIDCKR?

Yes, the INA500AIDCKR is pin-compatible with INA500BIDCKR and INA500CIDCKR in the same SC70-6 (DCK) package. All share identical pinout (IN+, IN–, OUT, REF, V–, V+), allowing drop-in replacement when gain selection (G = 1, 0.5, or 0.25) is the only design change-provided reference and common-mode voltage ranges are re-evaluated per version-specific specifications in the INA500AIDCKR datasheet.