Texas Instruments INA500CIDCKR

Overview

INA500CIDCKR 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 = 0.25 fixed gain, >1 MΩ input impedance, ±0.40 mV typical offset voltage (referred to output), 85 dB typical CMRR, 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 SC70-6 packaging.

For engineers reviewing the INA500CIDCKR datasheet, INA500CIDCKR pinout, INA500CIDCKR application, or INA500CIDCKR equivalent, key selection criteria include its ultra-low IQ, integrated matched resistor network eliminating external precision resistors, rail-to-rail input common-mode range up to 5×(V–) – 4×V_REF, and suitability for 8-bit to 12-bit ADC interfacing in space-constrained, battery-powered systems.

Technical Context

The INA500CIDCKR implements a fully integrated difference amplifier architecture with laser-trimmed thin-film resistors enabling precise G = 0.25 gain without external components. Its input stage achieves >1 MΩ differential input resistance (3.36 MΩ) and 1.05 MΩ common-mode resistance, supporting high-impedance voltage sensing while rejecting common-mode noise.

It features a single-ended output stage optimized for driving capacitive loads up to 100 pF with <20% overshoot, 160 kHz –3 dB bandwidth, and 0.19 V/µs slew rate - balancing speed, stability, and power efficiency for DC-coupled measurement paths in energy storage and portable electronics.

Key Specifications

Pinout & Package

The INA500CIDCKR is housed in a 6-pin SC70 (DCK) package measuring 2.1 mm × 1.25 mm, optimized for high-density PCB layouts in portable and modular power systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA500AIDCKR and INA500BIDCKR, the INA500CIDCKR provides the highest input common-mode voltage support (up to 27.5 V with 5.5 V supply), lowest gain for maximum headroom preservation, and best noise performance (150 nV/√Hz), making it uniquely suited for high-string-count battery monitoring where signal attenuation and noise immunity are primary constraints.

Availability

INA500CIDCKR is available at Aetrix Electronics and suitable for battery energy storage systems, EV charging infrastructure, and portable power tools requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for INA500CIDCKR 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 product line targets cost- and size-constrained battery monitoring and level-translation applications, integrating precision resistors and low-power amplifiers to replace discrete implementations in energy-efficient systems.

FAQ

What is the exact gain configuration of the INA500CIDCKR?

The INA500CIDCKR is the "C" version of the INA500 family and is factory-configured for a fixed gain of G = 0.25. This gain is implemented using an internal laser-trimmed thin-film resistor network with guaranteed ±0.1% maximum gain error across temperature. The INA500CIDCKR does not support user-selectable gain; alternative versions (INA500AIDCKR, INA500BIDCKR) provide G = 1 and G = 0.5 respectively.

Does the INA500CIDCKR require external resistors for gain setting?

No, the INA500CIDCKR does not require external resistors for gain setting. It integrates a precision-matched thin-film resistor network internally, which defines its G = 0.25 gain. This eliminates the need for external 0.1% tolerance resistors, reduces board area by up to 30%, and avoids thermal drift mismatches that occur in discrete implementations - a core design advantage confirmed in the INA500CIDCKR datasheet Section 3.

What is the maximum input common-mode voltage supported by the INA500CIDCKR?

With a 5.5 V supply, the INA500CIDCKR supports an input common-mode voltage range up to 5×(V–) – 4×V_REF, enabling operation with up to ±13.75 V differential input (27.5 V total) in G = 0.25 mode. This is explicitly specified in Section 6.7 of the INA500CIDCKR datasheet under "INPUT VOLTAGE - VCM", confirming its suitability for high-voltage battery string monitoring without external level-shifting circuitry.

Can the INA500CIDCKR drive a 100 pF load capacitance stably?

Yes, the INA500CIDCKR is characterized to drive up to 100 pF with <20% overshoot, as stated in Section 6.7 under "CL Drive". This capability is validated across temperature and supply conditions, ensuring stable step response when interfacing with ADC input capacitors, long traces, or ESD protection networks - a key specification distinguishing it from general-purpose op-amps not optimized for capacitive loading.

Is the INA500CIDCKR compatible with single-supply operation?

Yes, the INA500CIDCKR supports true single-supply operation from 1.7 V to 5.5 V. Its input common-mode range extends to within 100 mV of the negative rail (V–), and its output swings within 15 mV of both rails under 10 kΩ load, enabling full utilization of ADC input range without rail-to-rail input/output compromises. This is verified in Sections 6.3 and 6.7 of the INA500CIDCKR datasheet.