My Inquiry
My Account
Texas Instruments INA233AIDGSR
- Part No.:
- INA233AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA233AIDGSR.pdf
- Description:
- IC CURRENT MONITOR 0.1% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,739
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA233AIDGSR from Texas Instruments is a 16-bit ultra-precise digital current, voltage, power, and energy monitor IC with I²C/SMBus/PMBus interface, supporting high-side or low-side shunt sensing across 0V–36V bus voltages, ±10µV shunt offset, 0.1% gain error, and integrated power accumulator for energy metering in server power rails and telecom power supplies.
For engineers reviewing the INA233AIDGSR datasheet, INA233AIDGSR pinout, INA233AIDGSR application, or INA233AIDGSR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply support for industrial-grade power monitoring deployments.
Technical Context
The INA233AIDGSR integrates a 16-bit delta-sigma ADC multiplexed between shunt voltage (IN+, IN−) and bus voltage (VBUS) channels, enabling interleaved current and power calculation to minimize time-alignment errors. Its internal power accumulator computes energy (via READ_EIN command) and average power without host intervention.
It operates from 2.7V–5.5V supply, draws 310µA typical active current or 2µA in shutdown, supports 1.8V–5.0V logic-level I²C/SMBus/PMBus (400kHz max), and features independent alert thresholds for overcurrent, overpower, bus overvoltage, and undervoltage - all reported via open-drain ALERT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus Voltage Range | 0V to 36V - enables direct monitoring of 12V/24V/36V server, telecom, and industrial power rails without level-shifting. |
| Shunt Voltage Offset | ±10 µV max - ensures accurate current measurement at light loads and allows use of lower-value shunt resistors (e.g., 0.5 mΩ) to reduce power loss. |
| Gain Error | 0.1% max - guarantees calibrated current and power readings within ±0.1% of full-scale, critical for billing-grade power metering. |
| ADC Resolution | 16-bit - provides 2.5 µV LSB for shunt voltage and 1.25 mV LSB for bus voltage, enabling sub-millivolt precision in sense-path diagnostics. |
| Interface Compatibility | I²C/SMBus v3.0 & PMBus v1.3 - supports standard commands (e.g., READ_VIN, READ_IOUT, READ_PIN, READ_EIN) for plug-and-play integration into existing PMBus-based power management systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive auxiliary power modules and high-density server VRM telemetry. |
| Supply Current | 310 µA typical / 2 µA shutdown - enables always-on energy logging in battery-backed systems with minimal standby drain. |
Pinout & Package
INA233AIDGSR is housed in a 10-pin DGS (VSSOP) package measuring 3.00 mm × 4.90 mm, optimized for space-constrained PCB layouts in high-density power delivery networks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | Address configuration inputs | Set one of 16 unique I²C addresses by tying to GND, SCL, SDA, or VS - eliminates address conflicts in multi-rail monitoring systems. |
| ALERT | Open-drain multifunction alert output | Asserts on overcurrent, overpower, bus OV/UV, or communication fault - supports interrupt-driven host polling without continuous register reads. |
| GND | Analog ground reference | Common return for shunt, bus, and supply paths - must be connected to clean analog ground plane to maintain <10 µV offset performance. |
| IN+, IN− | Differential shunt voltage inputs | Accept ±81.92 mV differential input - directly interfaces with precision current-sense resistors; IN+ connects to supply side, IN− to load side. |
| SDA, SCL | I²C bidirectional data and clock | 1.8V–5.0V tolerant, 400kHz capable - interoperable with mixed-voltage microcontrollers and PMBus masters without level shifters. |
| VBUS | Bus voltage input | High-impedance (830 kΩ) input for 0V–36V rail monitoring - internal resistor divider scales voltage for 16-bit ADC without external components. |
| VS | Power supply input | 2.7V–5.5V single supply - powers internal analog and digital circuitry; decoupling with 0.1 µF ceramic capacitor required at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power accumulator | Records total accumulated power and sample count via READ_EIN command - enables firmware-independent energy metering and runtime average power calculation. |
| Configurable averaging & conversion time | 7 selectable CT modes (140 µs to 8.244 ms) + averaging up to 1024 samples - balances noise rejection, update rate, and system timing constraints in real-time power control loops. |
| Independent alert limits | Separate programmable thresholds for current, bus voltage, and power - allows granular fault detection (e.g., overcurrent trip at 120% while bus OV set at 110%) without host CPU overhead. |
| High-side or low-side sensing | No topology change required - same pinout and calibration supports either configuration, simplifying BOM consolidation across power stage variants. |
| 1.8V-compliant digital interface | VIH = 1.4 V min, VIL = 0.4 V max - ensures reliable communication with 1.8V FPGAs, ASICs, and microcontrollers common in modern server baseboards. |
Applications
| Server Power Rail Monitoring | Telecom DC Power Distribution |
|---|---|
|
Use Scenario: Real-time telemetry of 12V/48V intermediate bus current, voltage, and power in dual-CPU rack servers with dynamic load profiles. IC Role / Device Role / Timing Role: Digital current/voltage/power sensor with PMBus interface - provides synchronized, calibrated measurements every 4.7ms using 4-sample averaging and 588µs conversion time. Use Value: Enables closed-loop power budgeting and thermal derating based on actual rail consumption, reducing overdesign margin by up to 15%. |
Use Scenario: Fault detection and energy accounting in 48V distributed power architecture (DPA) for 5G base station remote radio units (RRUs). IC Role / Device Role / Timing Role: High-accuracy bus monitor with independent OV/UV alerts - triggers immediate shutdown on 48V rail sag below 40V or surge above 57.6V. Use Value: Prevents RRU damage during brownout events and supports predictive maintenance via long-term energy trend analysis. |
| Battery Charger Efficiency Validation | Industrial PLC Power Module Telemetry |
|
Use Scenario: Measuring charge current, input voltage, and instantaneous power in 24V Li-ion fast-charging systems with variable switching frequency. IC Role / Device Role / Timing Role: Precision shunt monitor with interleaved power calculation - computes true RMS power despite PWM-induced ripple using 16-bit resolution and delta-sigma filtering. Use Value: Validates charger efficiency across 10%–100% load range with ±0.2% power gain error, meeting IEC 62301 standby power certification requirements. |
Use Scenario: Continuous monitoring of 24V DC power feed to modular I/O backplanes in hazardous-location PLC cabinets operating at –40°C to +70°C. IC Role / Device Role / Timing Role: Robust industrial-grade power sensor - maintains ±10 µV offset and 0.1% gain accuracy across full temperature range with no recalibration. Use Value: Eliminates field failures due to undetected overcurrent conditions and enables remote diagnostics via PMBus STATUS_CML register reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current/voltage/power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA226AIDGSR | 16-bit resolution, 0.1% gain error, but lacks integrated power accumulator and energy metering capability; supports only I²C/SMBus (no PMBus commands like READ_EIN). | Suitable for basic current/voltage monitoring where average power suffices; not appropriate for kWh-level energy logging or firmware-light implementations. | Select INA226AIDGSR when cost sensitivity outweighs need for autonomous energy accumulation and PMBus ecosystem compatibility. |
| MAX40080TAUA+ | 16-bit resolution, 0.2% gain error, 1.2V–5.5V supply, but no built-in power calculation engine - requires host MCU to compute power from raw shunt/bus readings. | Used in space-constrained portable devices where external computation is acceptable; lacks ALERT-driven fault response and PMBus-standardized registers. | Choose MAX40080TAUA+ only when absolute minimal footprint (8-pin µMAX) is mandatory and host processor has spare cycles for real-time power math. |
Compared with INA226AIDGSR and MAX40080TAUA+, the INA233AIDGSR uniquely delivers autonomous energy accumulation, PMBus-native power/energy registers, and independent alert thresholds - making it the only option among the three that enables zero-host-effort energy metering and standardized fault reporting in infrastructure-class power systems.
Availability
INA233AIDGSR is available at Aetrix Electronics and suitable for server power telemetry, telecom DC distribution, and industrial PLC power module applications requiring stable component supply, long-lifecycle availability, and traceable sourcing for production programs.
Supply support for INA233AIDGSR 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 signal chain and power management ICs.
The INA233AIDGSR belongs to TI's high-accuracy current-sense monitor product line, designed specifically for intelligent power delivery systems requiring simultaneous, calibrated current, voltage, power, and energy data with PMBus interoperability.
FAQ
What is the maximum bus voltage the INA233AIDGSR can measure?
The INA233AIDGSR supports a bus voltage input range of 0V to 36V on the VBUS pin. This specification is absolute - applying more than 36V risks permanent damage. The internal scaling allows full 16-bit resolution across this range, with 1.25 mV LSB step size, making it ideal for monitoring 12V, 24V, and 36V industrial and telecom power rails without external dividers.
Does the INA233AIDGSR support both high-side and low-side current sensing?
Yes, the INA233AIDGSR supports both high-side and low-side shunt configurations without hardware or firmware changes. Its differential IN+ and IN− inputs accept common-mode voltages from 0V to 36V, independent of the 2.7V–5.5V VS supply. This flexibility allows placement on either side of the shunt resistor - critical for optimizing PCB layout and avoiding ground loop issues in complex power systems.
How does the power accumulator in the INA233AIDGSR enable energy metering?
The INA233AIDGSR's integrated power accumulator records total accumulated power and sample count accessible via the PMBus READ_EIN command. It autonomously integrates power over time without host intervention, enabling direct energy (watt-hours) calculation. This eliminates the need for continuous polling and external integration logic - a key differentiator versus alternatives like the INA226AIDGSR, which lacks this feature.
What are the I²C voltage-level requirements for the INA233AIDGSR?
The INA233AIDGSR's SDA and SCL pins are 1.8V–5.0V logic-level compliant, with VIH ≥ 1.4 V and VIL ≤ 0.4 V. This allows direct interfacing with 1.8V, 3.3V, and 5V microcontrollers and PMBus masters without level shifters. The device also supports SMBus v3.0 packet error checking and PMBus v1.3 commands, ensuring robust communication in noisy server and telecom environments.
Can the INA233AIDGSR operate in low-power shutdown mode?
Yes, the INA233AIDGSR includes a dedicated power-down mode that reduces quiescent current to 2 µA typical. In this state, the ADC and analog front-end are disabled, but registers remain readable and writable. Full functionality resumes within 40 µs after exiting shutdown. This mode is essential for battery-backed energy logging and always-on telemetry applications where standby current must be minimized.
INA233AIDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.1%
- Voltage - Input:
- 0V ~ 36V
- Current - Output:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA233AIDGSR FAQ
1.How can I place an order for INA233AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA233AIDGSR 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 INA233AIDGSR reliable?
The price and inventory of INA233AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA233AIDGSR is usually 5 days.
3.What payment methods are accepted for INA233AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA233AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA233AIDGSR?
INA233AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA233AIDGSR 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 INA233AIDGSR?
For technical support, including INA233AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA233AIDGSR requirements.
6.How does Aetrix verify that INA233AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA233AIDGSR 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 INA233AIDGSR meets industry standards.
7.What is the process for return or replacement of INA233AIDGSR?
All INA233AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA233AIDGSR, 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 INA233AIDGSR part is unused and in its original packaging.
Return procedure for INA233AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA233AIDGSR Tags
.jpg)
-
PSSI2021SAY,115
Nexperia USA Inc.
-
BCR401RE6327HTSA1
Infineon Technologies
-
INA199B2DCKR
Texas Instruments
-
INA199A1DCKR
Texas Instruments
-
INA199B1DCKR
Texas Instruments
-
NSI45015WT1G
onsemi
-
NSI45020T1G
onsemi
-
NSI45030AT1G
onsemi
-
NSI45025AT1G
onsemi
-
NSI45020AT1G
onsemi
-
NSI50010YT1G
onsemi
-
LM334Z/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
