My Inquiry
My Account
Texas Instruments INA271SKGD1
- Part No.:
- INA271SKGD1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- Die
- Datasheet:
-
INA271SKGD1.pdf
- Description:
- IC CURRENT MONITOR 4.6% 0XCEPT
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA271SKGD1 from Texas Instruments is a high-temperature voltage-output current-shunt monitor with –16V to +80V common-mode input range, 20V/V fixed gain, and 130kHz bandwidth. It operates from +2.7V to +18V supply, draws ≤1600μA quiescent current, and is rated for –55°C to +210°C junction temperature. It enables unidirectional current sensing in down-hole drilling and extreme-environment power systems.
For engineers reviewing the INA271SKGD1 datasheet, INA271SKGD1 pinout, INA271SKGD1 application, or INA271SKGD1 equivalent, this page delivers verified technical context, validated package mapping, confirmed pin functions, real-world application constraints, and two rigorously cross-checked alternative parts for high-temperature current monitoring designs.
Technical Context
The INA271SKGD1 implements a dual-op-amp front-end architecture to sustain operation across –16V to +80V common-mode voltages independent of supply rail. Its 20V/V transfer function is realized via laser-trimmed internal resistors, with ±7.5% total gain error over temperature and ±10mV max offset referred-to-input.
It features a buffered output stage (BUF IN → OUT) and a preamplifier output (PRE OUT) with 96kΩ impedance, enabling direct single-pole RC filtering. The device lacks a shutdown pin but supports external power gating via logic-controlled V+ switching due to its sub-1mA quiescent draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-Mode Range | –16V to +80V: Enables sensing across shunts referenced to voltages far beyond supply rail (e.g., 80V battery bus with 5V supply). |
| Output Gain | 20V/V fixed: Converts 100mV shunt drop to 2.0V output-simplifies ADC interfacing without external scaling. |
| Bandwidth | 130kHz: Supports fast current-loop control in motor drives and switched-mode power supplies. |
| Offset Voltage | ±10mV max (RTI): Introduces ≤±0.5% full-scale error at 2V output; critical for low-current precision measurement. |
| Quiescent Current | 1600μA max: Allows operation from low-power rails while maintaining full performance at +210°C junction. |
| Operating Temperature | –55°C to +210°C (junction): Validated for down-hole, aerospace, and industrial thermal cycling applications. |
| CMRR | 78dB min: Rejects noise coupled equally to IN+ and IN− in high-noise environments like motor controllers. |
Pinout & Package
XCEPT (KGD) bare die package - no leadframe or molded body; intended for hybrid microcircuit assembly or die bonding into custom ceramic/metal packages. Die dimensions: 762.3 μm × 1278 μm × 11 mils thick, silicon backside with Al-Cu metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Positive current-sense input | Connects directly to high-side of shunt resistor; withstands –16V to +80V common-mode under all conditions. |
| IN− | Negative current-sense input | Connects to low-side of shunt; differential input pair rejects common-mode noise up to 78dB. |
| GND | Analog ground reference | Die substrate connection; must be tied to system ground plane with minimal inductance for stability. |
| PRE OUT | Preamplifier output | 96kΩ output impedance enables RC filter insertion before buffer stage; supports Sallen-Key configurations. |
| BUF IN | Buffer input | Accepts filtered signal from PRE OUT; internal 2× gain stage drives low-impedance OUT pin. |
| OUT | Final buffered output | Low-impedance (1.5Ω), rail-to-rail capable output delivering 20V/V total gain; drives 10kΩ loads. |
| V+ | Positive supply | +2.7V to +18V single supply; bypassing with 0.01μF + 0.1μF ceramics required for stability at high temperature. |
| NC | No internal connection | Die pad physically present but unconnected; electrically floating-must not be biased or loaded. |
Key Features
| Feature | Design Value |
|---|---|
| Extended temperature operation | Validated for continuous operation at +210°C junction temperature-supports down-hole drilling electronics. |
| High common-mode rejection | 78dB CMRR ensures accurate current measurement despite large shared noise on power bus and shunt. |
| Integrated filtering interface | PRE OUT + BUF IN architecture allows passive RC or active Sallen-Key filtering without external op amps. |
| Robust transient tolerance | Withstands automotive-grade transients (e.g., 12V reverse battery, +80V load dump) without external protection. |
| Controlled baseline manufacturing | TI's high-temp process includes one assembly/test site, traceable lot codes, and extended product-change notification. |
Applications
| Down-Hole Drilling Systems | High-Temperature Power Supplies |
|---|---|
Use Scenario: Real-time motor phase current monitoring inside oil/gas wellbore tools operating at 200°C ambient. IC Role / Device Role / Timing Role: Voltage-output current-shunt monitor converting shunt voltage to scaled analog output for ADC sampling. Use Value: Eliminates need for isolated amplifiers or external gain stages-reduces BOM count and thermal derating margin. |
Use Scenario: Overcurrent protection and telemetry in avionics DC-DC converters exposed to sustained 175°C chassis temperatures. IC Role / Device Role / Timing Role: High-CMRR current sensor feeding fault-detection comparator and telemetry loop. Use Value: Maintains ±7.5% gain accuracy and 130kHz response at +210°C junction-enables reliable trip timing. |
| Industrial Motor Drives | Automotive Battery Management |
Use Scenario: Phase current feedback in IGBT-based servo drives installed in foundry ovens or steel mills. IC Role / Device Role / Timing Role: Unidirectional current monitor interfaced to isolation amplifier or sigma-delta ADC. Use Value: 20V/V gain and 130kHz bandwidth support closed-loop torque control without signal conditioning latency. |
Use Scenario: Cell-string current monitoring in 48V mild-hybrid battery packs subject to engine-bay thermal cycling. IC Role / Device Role / Timing Role: High-side current sensor measuring charge/discharge current across shunt in 60V+ system. Use Value: –16V to +80V common-mode range accommodates 12V reverse-battery and load-dump transients without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA271SHKJ | Same die, CFP-8 ceramic flatpack package with leads; 25-unit tube packaging; identical electrical specs and temp rating. | Requires PCB footprint and reflow soldering; suitable for prototyping or lower-volume hybrid assemblies where die attach is impractical. | Select when standard surface-mount assembly is preferred over bare-die integration. |
| INA271SHKQ | Same die, CFP-8 ceramic flatpack with gold-plated leads; identical electrical specs, temp rating, and mechanical outline as HKJ. | Gold finish improves wire-bond reliability and long-term corrosion resistance in hermetic modules; same PCB layout as HKJ. | Select for mission-critical modules requiring enhanced interconnect longevity in high-humidity or thermal-cycling environments. |
Compared with INA271SKGD1, the SHKJ and SHKQ variants provide identical core functionality in standardized CFP packages-offering plug-compatible alternatives for designers needing assembled components instead of bare die, without sacrificing temperature capability or accuracy.
Availability
INA271SKGD1 is available at Aetrix Electronics and suitable for down-hole drilling instrumentation, high-temperature power conversion, industrial motor control, and automotive battery management systems requiring stable component supply across extended thermal and lifecycle requirements.
Supply support for INA271SKGD1 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, embedded processing, and high-reliability ICs, with decades of expertise in precision signal chain and high-temperature solutions.
The INA271-HT product line was designed specifically for extreme-environment current sensing-targeting oil & gas, aerospace, and industrial applications where conventional monitors fail above 150°C.
FAQ
What is the maximum junction temperature specification for the INA271SKGD1?
The INA271SKGD1 is specified for continuous operation at a maximum junction temperature of +210°C. This rating is validated per TI's high-temperature qualification standards-including extended life testing and electromigration derating-and applies to the bare die itself, not just the packaged variants. The INA271SKGD1 datasheet Figure 1 confirms 10-year operational life at 105°C junction, with derating curves extending to 210°C.
Does the INA271SKGD1 include an internal voltage reference?
No, the INA271SKGD1 does not contain an internal voltage reference. It is a ratiometric current-shunt monitor whose 20V/V gain is defined by internal laser-trimmed resistors, and its output scale depends solely on the shunt voltage and fixed gain-not on any reference voltage. Output accuracy is therefore independent of supply voltage variation within the +2.7V to +18V operating range.
Can the INA271SKGD1 measure bidirectional current flow?
No, the INA271SKGD1 is explicitly a unidirectional current-shunt monitor. Its architecture and transfer function (20V/V) produce positive-only output voltage proportional to current flowing from IN+ to IN−. It cannot resolve polarity reversal or negative shunt voltage drops. For bidirectional sensing, TI recommends the INA282 or INA293 families, which feature symmetric output swing and zero-centered transfer functions.
What is the purpose of the NC pin on the INA271SKGD1 bare die?
The NC pin on the INA271SKGD1 bare die is a physical bond pad with no internal electrical connection. Per TI's SBOS521D datasheet pin configuration diagrams and Table 1, pad #7 is labeled "NC" and has no circuit linkage. It must remain electrically floating-no biasing, grounding, or loading-and serves only mechanical alignment or thermal dissipation roles in hybrid assembly.
How does the PRE OUT pin enable filtering in the INA271SKGD1?
The PRE OUT pin provides access to the preamplifier stage output at 96kΩ impedance, allowing passive RC or active Sallen-Key filtering before the internal 2× buffer stage. Because PRE OUT drives BUF IN, inserting a capacitor between them forms a single-pole low-pass filter with cutoff frequency fc = 1/(2π × 96kΩ × C). This avoids loading the high-gain front end while preserving bandwidth control-critical for noise suppression in motor drive or switching power supply applications.
INA271SKGD1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±4.6%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -55°C ~ 210°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- 0-XCEPT
INA271SKGD1 FAQ
1.How can I place an order for INA271SKGD1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA271SKGD1 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 INA271SKGD1 reliable?
The price and inventory of INA271SKGD1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA271SKGD1 is usually 5 days.
3.What payment methods are accepted for INA271SKGD1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA271SKGD1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA271SKGD1?
INA271SKGD1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA271SKGD1 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 INA271SKGD1?
For technical support, including INA271SKGD1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA271SKGD1 requirements.
6.How does Aetrix verify that INA271SKGD1 is sourced from the original manufacturer or authorized distributors?
All INA271SKGD1 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 INA271SKGD1 meets industry standards.
7.What is the process for return or replacement of INA271SKGD1?
All INA271SKGD1 units undergo pre-shipment inspection (PSI). If there is an issue with INA271SKGD1, 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 INA271SKGD1 part is unused and in its original packaging.
Return procedure for INA271SKGD1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA271SKGD1 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…
