Texas Instruments INA780BIDEKR

Overview

INA780BIDEKR from Texas Instruments is a 16-bit precision digital power monitor IC with integrated 400 µΩ shunt, ±75 A continuous current sensing, ±85 V common-mode voltage range, and 2.94-MHz I²C interface. It performs real-time calculation of current, bus voltage, temperature, power, energy, and charge in industrial battery packs and telecom power delivery systems.

For engineers reviewing the INA780BIDEKR datasheet, INA780BIDEKR pinout, INA780BIDEKR application, or INA780BIDEKR equivalent, this device supports high-accuracy bidirectional current monitoring at up to 85 V bus voltage with programmable conversion time (50 µs–4.12 ms), on-chip temperature compensation, and ±0.5% internal oscillator tolerance - critical for stable energy metering and overcurrent protection design.

Technical Context

The INA780BIDEKR integrates a delta-sigma ADC with independent shunt voltage, bus voltage, and temperature measurement paths multiplexed to a single 16-bit core. Its internal shunt resistor (400 µΩ nominal) is Kelvin-connected via IS+/IS− and SH+/SH− terminals, enabling low-drift current sensing across –40°C to +125°C ambient.

It employs background calculation logic to derive power (µW resolution), energy (7.68 mJ/LSB), and charge (150 µC/LSB) without extending conversion latency. The 2.94-MHz I²C interface supports 16 pin-selectable addresses and operates in Fast Mode (400 kHz) or High-Speed Mode (up to 2.94 MHz), with open-drain SDA/SCL and active-low ALERT output.

Key Specifications

Pinout & Package

INA780BIDEKR is housed in a 15-pin WSON package (DEK), measuring 6.00 mm × 6.00 mm, with wettable flanks and thermal pad exposed on bottom for enhanced heat dissipation in high-current applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital power monitoring applications.

Compared with INA229AIRGTR and MAX40080FAUA+, the INA780BIDEKR uniquely combines integrated 400 µΩ shunt, ±75 A continuous capability, on-chip energy/charge accumulation, and ±0.5% oscillator - making it optimal for production-ready 48 V–85 V power telemetry where layout simplicity and firmware offload are critical.

Availability

INA780BIDEKR is available at Aetrix Electronics and suitable for industrial battery packs, telecom power delivery, and enterprise server PSUs requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for INA780BIDEKR 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 sensing and power management ICs.

The INA780x product line was designed specifically for high-voltage, high-accuracy digital power monitoring in infrastructure and industrial systems - integrating shunt, ADC, oscillator, and calculation engine into one WSON package to eliminate calibration complexity.

FAQ

What is the maximum continuous current rating for the INA780BIDEKR?

The INA780BIDEKR supports ±75 A continuous current at TA = 25°C, with peak measurement capability up to ±78.64 A. Its internal shunt resistor has a nominal 400 µΩ resistance, and thermal limits are defined by junction temperature (≤150°C); derating applies above 25°C ambient per Figure 6-4 in the datasheet. The INA780BIDEKR's safe operating area is validated on the SENS119A evaluation module.

Does the INA780BIDEKR require external calibration for current measurement?

No, the INA780BIDEKR does not require external calibration for current measurement. It features factory-trimmed offset and gain, integrated temperature compensation, and an on-chip ±0.5% oscillator - enabling out-of-box accuracy of ±125 mA offset and ±1.25% gain error (B grade) across –40°C to +125°C. The INA780BIDEKR's EZShunt™ architecture ensures matched shunt-to-ADC performance without user calibration.

Can the INA780BIDEKR measure bus voltages above its supply voltage (VS)?

Yes, the INA780BIDEKR can measure bus voltages from –0.1 V to +85 V independently of its 2.7 V to 5.5 V supply voltage (VS). Its input stage supports high common-mode operation, allowing direct connection to 48 V, 60 V, or 85 V rails while powered from a 3.3 V or 5 V logic supply. This eliminates level-shifting circuitry and enables flexible power sequencing - the bus voltage may be present before or after VS is applied.

How does the INA780BIDEKR handle energy and charge accumulation?

Energy and charge accumulation in the INA780BIDEKR occur automatically in hardware: power (V×I) is computed continuously, then multiplied by time to update energy (joules) and charge (coulombs) registers. These values integrate over time with ±2.1% full-scale accuracy (B grade) and are not affected by user-configured averaging - unlike current/voltage readings, they accumulate per conversion cycle without software intervention. The INA780BIDEKR stores these values in dedicated 32-bit registers accessible via I²C.

What I²C address options are available on the INA780BIDEKR?

The INA780BIDEKR supports 16 unique I²C addresses via two hardware-selectable pins (A0 and A1), each configurable to GND, SCL, SDA, or VS. This enables up to 16 devices on a single I²C bus without address conflicts - critical for multi-rail monitoring in servers or modular power systems. Address selection is latched at power-up and remains fixed until reset; no software configuration is required.