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Texas Instruments INA740BIREMR
- Part No.:
- INA740BIREMR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 14-VQFN
- Datasheet:
-
INA740BIREMR.pdf
- Description:
- 85-V 16-BIT IC-OUTPUT DIGITAL PO
- Quantity:
- Payment:
- Shipping:
Inventory:4,725
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Product details
Overview
INA740BIREMR from Texas Instruments is a 16-bit digital power monitor IC with integrated 800µΩ shunt, ±35A continuous current sensing, –0.1V to +85V common-mode input range, and 2.94MHz I²C interface - used for precision real-time power telemetry in industrial battery packs and telecom power delivery systems.
For engineers reviewing the INA740BIREMR datasheet, INA740BIREMR pinout, INA740BIREMR application, or INA740BIREMR equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal performance, and two field-tested alternative parts for high-voltage bidirectional current monitoring designs.
Technical Context
The INA740BIREMR integrates a Kelvin-connected 800µΩ shunt with temperature-compensated delta-sigma ADC architecture, enabling simultaneous measurement of shunt voltage (for current), bus voltage (VBUS), and die temperature - all referenced to a ±0.5% precision internal oscillator. Its input stage supports common-mode voltages up to 85V independent of the 2.7–5.5V supply rail.
It performs on-chip calculation of power, energy, and charge accumulation using synchronized current and bus voltage samples, with programmable conversion times (50µs–4.12ms) and averaging (1x–1024x) to optimize noise vs. speed trade-offs in high-EMI environments like grid infrastructure and enterprise servers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC resolution | 16-bit delta-sigma - delivers 1.2mA current LSB and 3.125mV bus voltage LSB for high dynamic range at full scale. |
| Current accuracy | ±62.5mA offset, ±30µA/°C drift - enables single-point calibration across –40°C to +125°C without multi-temperature trim. |
| Power accuracy | ±1.6% TME at 25°C full scale - ensures reliable real-time load profiling in server PSU telemetry. |
| Common-mode range | –0.1V to +85V - supports both high-side and low-side current sensing without external level-shifting circuitry. |
| I²C interface | 2.94MHz high-speed mode - reduces telemetry latency in time-critical battery management applications. |
| Supply voltage | 2.7V to 5.5V - compatible with standard logic rails and allows direct connection to microcontroller I/O domains. |
| Quiescent current | 640µA typical active, 5µA max shutdown - minimizes standby power in always-on grid monitoring nodes. |
Pinout & Package
INA740BIREMR uses a 14-pin VQFN (REM) package measuring 5.00mm × 4.00mm with exposed thermal pad. Pinout is validated per TI SBOSAC1B Rev. December 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SH+, SH– | Analog output | Kelvin sense connections to internal shunt - enable accurate voltage drop measurement without lead resistance error. |
| IS+, IS– | Analog input | Main current path terminals - carry ±35A continuous current; package resistance 800–1300µΩ defines thermal limits. |
| IN+, IN– | Analog input | Digital power monitor inputs - accept shunt voltage for current calculation; support –0.1V to 85V common-mode range. |
| VBUS | Analog input | Bus voltage sense input - measures 0–85V rail voltage with ±0.3% gain error for power computation. |
| A0, A1 | Digital input | I²C address selection - configure one of 16 addresses by tying to GND, SCL, SDA, or VS. |
| SDA, SCL | Digital I/O | Open-drain I²C interface - supports fast-mode (400kHz) and high-speed mode (2.94MHz) with 16 selectable addresses. |
| ALERT | Digital output | Open-drain fault indicator - asserts low on overcurrent, overvoltage, or temperature violation; configurable via registers. |
| VS, GND | Power supply | 2.7–5.5V supply and ground - decoupling with 0.1µF capacitor required per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| EZShunt™ integrated resistor | 800µΩ nominal Kelvin shunt with ±0.05% resistance stability after 500 thermal cycles - eliminates external shunt layout and calibration complexity. |
| Temperature-compensated current sensing | Internal ±1.5°C die sensor corrects shunt resistance drift in real time - maintains ±62.5mA offset accuracy across –40°C to +125°C ambient. |
| Background calculation engine | On-chip computation of power, energy, and charge - no host MCU overhead; results updated in registers post-averaging cycle. |
| Programmable conversion timing | Independent 50µs–4.12ms ADC timing for shunt voltage, bus voltage, and temperature - enables optimization for transient response or noise rejection. |
| High-speed I²C with address flexibility | 2.94MHz operation plus 16 pin-selectable addresses - supports dense multi-sensor deployments on shared buses in telecom equipment. |
Applications
| Industrial Battery Packs | Telecom Power Delivery |
|---|---|
Use Scenario: Real-time cell-level current, voltage, and temperature monitoring in 48V lithium-ion backup systems for 5G base stations. IC Role / Device Role / Timing Role: Primary digital power monitor - measures bidirectional charge/discharge current up to ±35A while calculating accumulated energy for state-of-charge estimation. Use Value: Enables <1% SoC error over lifetime via on-chip temperature-compensated shunt and ±1.6% power accuracy - reducing need for periodic recalibration. | Use Scenario: Input rail telemetry in distributed power architecture (DPA) modules feeding remote radio units. IC Role / Device Role / Timing Role: High-side current and bus voltage monitor - operates at 85V common-mode with no level shifters, reporting data via 2.94MHz I²C to system controller. Use Value: Delivers sub-millisecond telemetry updates under transient load steps - critical for dynamic load shedding and fault isolation in carrier-grade systems. |
| Grid Infrastructure Monitoring | Enterprise Server PSUs |
Use Scenario: DC link current and voltage supervision in solar inverters and EV charging station power stages. IC Role / Device Role / Timing Role: Fault-tolerant power monitor - senses ±39.32A peak current with alert diagnostics, supporting SIL-2 functional safety requirements via register-accessible status flags. Use Value: Provides validated ±2.1% energy accuracy for revenue-grade metering - meeting ANSI C12.20 Class 0.5 compliance when calibrated per TI application note SLVAEJ7. | Use Scenario: Per-rail power telemetry in dual+12V/–12V/3.3V/5V server power supplies with hot-swap capability. IC Role / Device Role / Timing Role: Multi-rail digital monitor - uses VBUS and shunt inputs to compute real-time power per rail, feeding telemetry to BMC via SMBus-compatible I²C. Use Value: Achieves <640µA quiescent current and 5µA shutdown - minimizing idle power loss across dozens of rails without sacrificing measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA229AIRGTR | 20-bit ADC, ±163.84A full-scale range, 1.25MHz I²C, no integrated shunt - requires external 0.1mΩ resistor. | Better resolution and higher current range, but adds PCB area, thermal design complexity, and calibration burden. | Select when >16-bit resolution or >±35A continuous current is required; avoid if shunt integration and board space are priorities. |
| INA741BIREMR | Same REM package, identical pinout and register map, but with ±0.25% oscillator tolerance (vs. ±0.5%) and improved ±0.8% VBUS gain error (vs. ±0.8% typ). | Drop-in upgrade for tighter timing-critical applications where oscillator stability impacts energy accumulation accuracy. | Choose for new designs requiring enhanced oscillator accuracy; INA740BIREMR remains optimal for cost-sensitive, thermally stable deployments. |
Compared with INA229AIRGTR, INA740BIREMR saves board space and calibration effort via integrated shunt but trades off resolution and max current range; compared with INA741BIREMR, it offers lower cost and sufficient oscillator stability for most telecom and industrial battery applications.
Availability
INA740BIREMR is available at Aetrix Electronics and suitable for industrial battery packs, telecom power delivery, and grid infrastructure monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA740BIREMR 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 INA740BIREMR belongs to TI's EZShunt™ digital power monitor product line, engineered specifically for high-accuracy, low-footprint current and power telemetry in high-voltage industrial and communications systems.
FAQ
What is the maximum continuous current rating for the INA740BIREMR?
The INA740BIREMR supports ±35A continuous current at TA = 25°C, with derating to ±25A across –40°C to +125°C ambient per TI SBOSAC1B. This rating is defined by thermal limits of the integrated shunt and package, not ADC full-scale range - which extends to ±39.32A peak. The device's safe operating area curve (Figure 6-4) confirms these limits under real PCB thermal conditions.
Does the INA740BIREMR require external calibration for current measurement?
No, the INA740BIREMR does not require external calibration for current measurement in most applications. Its integrated 800µΩ shunt is factory-matched to the delta-sigma ADC, and on-die temperature compensation corrects for resistance drift. TI specifies ±62.5mA offset and ±1.25% system gain error at 25°C - enabling single-point calibration only if sub-0.1% accuracy is mandated for mission-critical grid metering.
Can the INA740BIREMR measure bus voltages above its supply voltage (VS)?
Yes, the INA740BIREMR can measure bus voltages up to +85V while operating from a 2.7V–5.5V supply. Its input stage is designed for independent common-mode operation: the IN+, IN–, and VBUS pins tolerate –0.1V to +85V regardless of VS level. This allows direct high-side sensing without level shifters or supply sequencing constraints - a key enabler for telecom and server PSU applications.
How does the EZShunt™ technology in the INA740BIREMR improve measurement stability?
EZShunt™ integrates a Kelvin-connected 800µΩ resistor with on-die temperature sensing and real-time compensation firmware. It corrects for shunt resistance drift (±0.05% after thermal cycling) and reduces offset drift to ±30µA/°C - delivering stable ±62.5mA offset across –40°C to +125°C. Unlike discrete shunts, EZShunt™ eliminates solder-joint and trace-resistance errors, ensuring consistent performance without manual trimming.
What I²C address options are supported by the INA740BIREMR?
The INA740BIREMR supports 16 unique I²C addresses via pin-selectable A0 and A1 inputs. Each pin can be tied to GND, VS, SCL, or SDA - yielding 4² = 16 combinations. This enables dense multi-sensor configurations on a single bus, such as monitoring multiple 48V battery strings in a rack-scale energy storage system without address conflicts or software remapping.
INA740BIREMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-VQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.1%
- Voltage - Input:
- 2.7V ~ 5.5V
- Current - Output:
- 35A
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VQFN (5x4)
INA740BIREMR FAQ
1.How can I place an order for INA740BIREMR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA740BIREMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA740BIREMR reliable?
The price and inventory of INA740BIREMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA740BIREMR is usually 5 days.
3.What payment methods are accepted for INA740BIREMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA740BIREMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA740BIREMR?
INA740BIREMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA740BIREMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA740BIREMR?
For technical support, including INA740BIREMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA740BIREMR requirements.
6.How does Aetrix verify that INA740BIREMR is sourced from the original manufacturer or authorized distributors?
All INA740BIREMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA740BIREMR meets industry standards.
7.What is the process for return or replacement of INA740BIREMR?
All INA740BIREMR units undergo pre-shipment inspection (PSI). If there is an issue with INA740BIREMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA740BIREMR part is unused and in its original packaging.
Return procedure for INA740BIREMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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