My Inquiry
My Account
Texas Instruments INA229AIDGSR
- Part No.:
- INA229AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA229AIDGSR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,717
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA229AIDGSR from Texas Instruments is an ultra-precise 20-bit delta-sigma digital power/energy/charge monitor IC for high-side and low-side current sensing in 85-V systems. It delivers ±1 µV shunt offset voltage, ±0.05% power measurement error over –40°C to +125°C, and 75-µs alert response - enabling accurate real-time monitoring in telecom power supplies and server VRMs.
For engineers reviewing the INA229AIDGSR datasheet, INA229AIDGSR pinout, INA229AIDGSR application, or INA229AIDGSR equivalent, key selection criteria include its ±163.84-mV shunt input range, 10-MHz SPI interface, integrated temperature sensor (±1°C), programmable conversion time (50 µs–4.12 ms), and 2.7–5.5-V supply operation with 640-µA typical quiescent current.
Technical Context
The INA229AIDGSR integrates a single 20-bit delta-sigma ADC with internal multiplexer routing shunt voltage (IN+/IN−), bus voltage (VBUS), and die temperature to a shared conversion path. Its architecture supports independent ADC configuration per channel - including selectable full-scale ranges (±163.84 mV or ±40.96 mV) and conversion times - while performing background calculations for current, power, energy, and charge.
It features a precision ±0.5% integrated oscillator, programmable resistor temperature compensation, and a dedicated digital engine that computes power (P = I × V), energy (E = ∫P dt), and charge (Q = ∫I dt) without adding latency. The device operates across –0.3 V to +85 V common-mode range with 154 dB CMRR and 2.5 nA max input bias current - enabling sub-mA sensing with large-value shunts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC resolution | 20-bit delta-sigma - enables 312.5-nV LSB step size for high dynamic range in mA-to-kA sensing. |
| Shunt offset voltage | ±1 µV max - minimizes zero-current error, critical for microamp-level accuracy without multi-point calibration. |
| Power measurement error | ±0.5% FS over –40°C to +125°C - ensures stable energy accounting in industrial battery packs and PoE PSEs. |
| Common-mode range | –0.3 V to +85 V - supports direct high-side sensing on 48-V telecom rails and 85-V DC/DC outputs without level shifters. |
| SPI interface speed | 10 MHz - enables rapid register reads during fast transient events, compatible with standard MCU SPI peripherals. |
| Temperature sensor accuracy | ±1°C at 25°C - provides reliable die temperature tracking for thermal derating of power stages and shunt resistors. |
| Quiescent current | 640 µA typical - allows continuous monitoring in always-on server management controllers without excessive standby loss. |
Pinout & Package
The INA229AIDGSR is housed in a 10-pin VSSOP package (3.00 mm × 3.00 mm), optimized for compact high-voltage PCB layouts with thermal relief via exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Digital input | Active-low SPI chip select; enables multi-device bus sharing and reduces idle current when deasserted. |
| 2 - MOSI | Digital input | Serial data input for register writes and configuration; compatible with 3.3-V and 5-V logic levels. |
| 3 - ALERT | Digital output | Open-drain fault indicator - asserts on overvoltage, overcurrent, or temperature threshold breach; configurable via registers. |
| 4 - MISO | Digital output | Push-pull SPI data output; eliminates need for external pull-up and supports faster read cycles than open-drain alternatives. |
| 5 - SCLK | Digital input | Master-generated clock up to 10 MHz; timing-critical for register access and conversion synchronization. |
| 6 - VS | Power supply | 2.7–5.5-V analog/digital supply; powers internal oscillator, ADC, and digital core - independent of sensed rail voltage. |
| 7 - GND | Ground reference | Analog/digital common return; must be star-connected near shunt resistor to avoid ground loop errors. |
| 8 - VBUS | Analog input | 0–85-V bus voltage sense node; high-impedance (1 MΩ) input enables direct connection to high-voltage rails with minimal loading. |
| 9 - IN− | Analog input | Negative shunt terminal - connects to load side (high-side) or ground side (low-side); defines differential measurement point. |
| 10 - IN+ | Analog input | Positive shunt terminal - connects to supply side (high-side) or load side (low-side); completes 20-bit differential sensing path. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable shunt full-scale range | ±163.84 mV or ±40.96 mV - selects optimal resolution for either wide-range (e.g., 100-A) or high-precision (e.g., 1-A) applications. |
| Configurable conversion time & averaging | 50 µs to 4.12 ms per sample, 1× to 1024× averaging - balances noise rejection and update rate for noisy switcher environments. |
| Integrated calculation engine | Real-time background computation of current, power, energy, and charge - eliminates host MCU overhead and timing jitter. |
| Low input bias current | 2.5 nA max - permits use of ≥100-Ω shunts for µA-level current sensing without significant voltage drop or self-heating error. |
| Alert response latency | 75 µs - enables fast hardware-triggered shutdown in overcurrent protection circuits before damage occurs. |
Applications
| Telecom Power Supply Monitoring | Enterprise Server VRM Telemetry |
|---|---|
|
Use Scenario: Real-time current, voltage, and power monitoring in 48-V intermediate bus converters feeding baseband units. IC Role / Device Role / Timing Role: High-side shunt monitor reporting bus voltage, load current, and instantaneous power via SPI to BMC controller every 100 µs. Use Value: Enables dynamic power capping and predictive thermal management using ±0.5% power accuracy across –40°C to +85°C ambient. |
Use Scenario: Per-phase current and energy accumulation in multi-phase CPU/GPU VRMs for workload-aware power budgeting. IC Role / Device Role / Timing Role: Continuous-conversion mode INA229AIDGSR measuring shunt voltage and VBUS, computing charge and energy in background. Use Value: Provides true joule- and coulomb-level telemetry for firmware-based power optimization without host CPU polling overhead. |
| Industrial Battery Pack Management | Power-over-Ethernet (PoE) PSE |
|
Use Scenario: Cell-string current and accumulated charge tracking in 24–72-V lithium-ion battery packs for UPS and robotics. IC Role / Device Role / Timing Role: Low-side shunt monitor with programmable temperature compensation, logging charge (Q = ∫I dt) over extended cycles. Use Value: Delivers ±1% full-scale energy accuracy for state-of-charge estimation, eliminating need for periodic recalibration. |
Use Scenario: Class 8 PoE++ (90-W) power sourcing equipment validating delivered power and detecting cable faults. IC Role / Device Role / Timing Role: High-side monitor on 57-V PoE output rail, triggering ALERT within 75 µs on overcurrent or short-circuit events. Use Value: Meets IEEE 802.3bt fast fault detection requirements while maintaining ±1 µV offset stability across cable temperature gradients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA226AIDGSR | 16-bit ADC, ±5-µV offset, no energy/charge accumulation, 1-MHz SPI | Limited to basic current/voltage/power; insufficient for precise energy metering or µA-level sensing | Choose for cost-sensitive, lower-accuracy applications where 20-bit resolution and background energy math are unnecessary. |
| MAX31820MUA+ | 12-bit ADC, ±15-µV offset, no SPI, 1-Wire interface, no bus voltage sensing | Single-channel current-only sensing; lacks VBUS, temperature, and power calculation capabilities | Select only for simple, low-pin-count current monitoring where system-level integration and multi-parameter telemetry are not required. |
Compared with INA226AIDGSR and MAX31820MUA+, the INA229AIDGSR uniquely combines 20-bit precision, full 85-V bus sensing, integrated energy/charge accumulation, and 10-MHz SPI - making it the only option capable of replacing discrete metrology chains in high-reliability server and telecom power systems.
Availability
INA229AIDGSR is available at Aetrix Electronics and suitable for telecom equipment, enterprise servers, and industrial battery packs requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for INA229AIDGSR 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 INA229 belongs to TI's ultra-precise digital power monitor product line, engineered specifically for high-accuracy, multi-parameter telemetry in 48-V to 85-V infrastructure systems where traditional shunt+MCU solutions lack resolution, speed, or integration.
FAQ
What is the maximum common-mode voltage the INA229AIDGSR can measure?
The INA229AIDGSR supports a common-mode input range of –0.3 V to +85 V at the IN+ and IN– pins. This allows direct high-side current sensing on 48-V telecom rails and 85-V DC/DC outputs without external level-shifting circuitry. The specification is guaranteed over the full –40°C to +125°C operating temperature range and is independent of the 2.7–5.5-V VS supply voltage.
Does the INA229AIDGSR perform energy and charge calculations internally?
Yes, the INA229AIDGSR performs real-time background computation of energy (E = ∫P dt) and charge (Q = ∫I dt) using its integrated digital engine. These values accumulate continuously in dedicated registers during continuous-conversion mode and require no host MCU intervention. The device achieves ±1% full-scale accuracy for both parameters, making it suitable for battery fuel gauging and power billing applications.
Can the INA229AIDGSR operate with a 3.3-V supply while monitoring an 85-V bus?
Yes, the INA229AIDGSR operates from a 2.7–5.5-V VS supply and simultaneously monitors bus voltages up to 85 V on the VBUS pin and common-mode voltages up to 85 V on the IN+ and IN– pins. The internal architecture isolates the analog front-end from the supply domain, allowing safe and accurate operation even when the monitored rail is far above VS - a key enabler for compact, high-voltage power system telemetry.
What is the fastest conversion time achievable with the INA229AIDGSR?
The minimum ADC conversion time for the INA229AIDGSR is 50 µs per channel (shunt voltage, bus voltage, or temperature), configurable via the ADC_CONFIG register. When only one parameter is enabled and averaging is disabled, the device updates output registers every 50 µs. Combined with its 75-µs alert response, this enables sub-100-µs fault detection - critical for protecting sensitive loads in PoE and server VRM applications.
How does the INA229AIDGSR handle temperature compensation for shunt resistors?
The INA229AIDGSR includes programmable resistor temperature compensation, allowing users to enter shunt resistance drift coefficients (e.g., ppm/°C) into dedicated registers. The device then applies real-time correction to current measurements based on its integrated ±1°C-accurate die temperature sensor. This eliminates manual software compensation and maintains accuracy across wide ambient temperature swings in industrial battery and telecom deployments.
INA229AIDGSR 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-Side
- Accuracy:
- ±0.01%
- Voltage - Input:
- 2.7V ~ 5.5V
- Current - Output:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA229AIDGSR FAQ
1.How can I place an order for INA229AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA229AIDGSR 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 INA229AIDGSR reliable?
The price and inventory of INA229AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA229AIDGSR is usually 5 days.
3.What payment methods are accepted for INA229AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA229AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA229AIDGSR?
INA229AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA229AIDGSR 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 INA229AIDGSR?
For technical support, including INA229AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA229AIDGSR requirements.
6.How does Aetrix verify that INA229AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA229AIDGSR 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 INA229AIDGSR meets industry standards.
7.What is the process for return or replacement of INA229AIDGSR?
All INA229AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA229AIDGSR, 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 INA229AIDGSR part is unused and in its original packaging.
Return procedure for INA229AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA229AIDGSR 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…
