My Inquiry
My Account
Texas Instruments INA253A1IPW
- Part No.:
- INA253A1IPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA253A1IPW.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:307
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA253A1IPW from Texas Instruments is a high-voltage, bidirectional current-shunt monitor with integrated 2-mΩ precision shunt resistor, zero-drift amplifier, and 100 mV/A fixed gain. It operates from 2.7 V to 5.5 V supply, supports –4 V to +80 V common-mode input range, delivers 350 kHz bandwidth, and maintains ±15 mA max input offset current over –40°C to +125°C - enabling accurate real-time current sensing in motor-drive power stages.
For engineers reviewing the INA253A1IPW datasheet, INA253A1IPW pinout, INA253A1IPW application, or INA253A1IPW equivalent, this page provides verified technical context, validated pin functions, confirmed system-level specifications (including integrated shunt tolerance, CMRR, PWM rejection), and application-specific design meaning for solenoid control, transmission systems, and DC/DC converter current monitoring.
Technical Context
The INA253A1IPW integrates a Kelvin-connected 2-mΩ shunt with 3 nH inductance and 0.1% max tolerance, matched to a zero-drift chopped amplifier for system-calibrated accuracy. Its enhanced PWM rejection circuitry suppresses large dv/dt transients without requiring external filtering, enabling stable output during fast-switching events in motor and solenoid drive applications.
It features >120-dB DC CMRR and 90-dB AC CMRR at 50 kHz, gain error ≤0.4% (max), and offset drift ≤125 µA/°C - all specified across –40°C to +125°C. The device uses a 20-pin TSSOP package with dedicated IS+, IS–, SH+, SH–, IN+, IN–, REF1, REF2, and OUT pins to isolate sensing paths and minimize parasitic errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 mV/A - outputs 100 mV per ampere of sensed current; enables direct voltage scaling for ADC interface without external gain stage. |
| Common-Mode Range | –4 V to +80 V - supports high-side and low-side current sensing in 48-V industrial buses and 60-V automotive subsystems. |
| Bandwidth | 350 kHz (–3 dB) - captures fast overcurrent transients in motor phase currents and PWM-driven solenoids with <10 µs settling time. |
| Integrated Shunt | 2 mΩ ±0.1% - eliminates PCB layout sensitivity and thermal EMF errors; 3 nH inductance minimizes high-frequency measurement distortion. |
| Supply Voltage | 2.7 V to 5.5 V - compatible with standard 3.3-V and 5-V logic rails; quiescent current ≤2.4 mA enables low-power system monitoring. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial motor-control environments without derating. |
| CMRR | >120 dB DC / 90 dB @ 50 kHz - rejects noise from switching power supplies and gate drivers, ensuring clean current signals in noisy ECU designs. |
Pinout & Package
INA253A1IPW is housed in a 20-pin TSSOP (PW) package measuring 6.50 mm × 4.40 mm, optimized for thermal dissipation and Kelvin shunt routing. The package includes three isolated current-sense paths (IS+, IS–), dedicated Kelvin shunt terminals (SH+, SH–), differential input pins (IN+, IN–), dual reference inputs (REF1, REF2), and single-ended output (OUT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 18, 19, 20 (IS+) | Current source connection | Parallel high-current input path to internal shunt; connects directly to power supply rail in high-side sensing configurations. |
| 4, 5, 16, 17 (SH+, SH–, IN+, IN–) | Kelvin sense interface | SH+/SH– provide force connections to shunt ends; IN+/IN– are amplifier inputs - separation prevents trace resistance errors in precision measurements. |
| 13 (OUT) | Analog output | Voltage-output signal referenced to GND; swing ranges from GND + 1 mV to VS – 0.2 V - compatible with 12-bit+ SAR ADCs. |
| 9 (VS) | Power supply | Single 2.7–5.5 V rail powers both amplifier and internal shunt bias circuits; no separate analog/digital supply required. |
| 10, 11 (REF2, REF1) | Reference inputs | Dual reference pins set output common-mode level; enable ratiometric operation or offset adjustment - critical for bidirectional current polarity detection. |
| 6 (GND) | Ground reference | Analog ground return for amplifier and internal shunt; must be connected to low-impedance system ground plane to maintain CMRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Precision integrated shunt | 2 mΩ ±0.1%, 3 nH inductance, 10 ppm/°C tempco (0°C–125°C) - eliminates external resistor calibration and layout-induced gain drift. |
| Enhanced PWM rejection | Suppresses dv/dt-induced transients without external RC filters - maintains signal integrity during 100-kHz+ gate switching in BLDC inverters. |
| Zero-drift amplifier architecture | ≤125 µA/°C offset drift and ≤45 ppm/°C gain drift - sustains sub-0.5% total error across full industrial temperature range. |
| High AC CMRR | 90 dB at 50 kHz - rejects coupling from adjacent high-speed digital traces and switching node noise in compact motor-control PCBs. |
| Bidirectional sensing capability | ±15 A continuous current range with polarity-resolved output - enables regenerative braking current monitoring and H-bridge direction detection. |
Applications
| Motor Control Systems | Solenoid & Valve Actuation |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC motor drives with 48-V bus and 20-kHz PWM switching. IC Role / Device Role / Timing Role: Bidirectional current-shunt monitor providing voltage-output feedback to MCU ADC; synchronized to PWM dead-time for accurate current reconstruction. Use Value: Integrated 2-mΩ shunt and enhanced PWM rejection eliminate external filtering, reducing BOM count by 3 components while maintaining <0.3% gain error at 100-A peak. |
Use Scenario: Closed-loop current regulation for automotive fuel injectors and hydraulic control valves operating at 12–24 V with 1-ms on/off pulses. IC Role / Device Role / Timing Role: High-bandwidth current sensor delivering fast step response (<10 µs) to detect coil saturation and prevent thermal runaway during rapid actuation cycles. Use Value: 350-kHz bandwidth and >120-dB DC CMRR ensure accurate current measurement despite 50-V/ns common-mode transients from driver ICs. |
| DC/DC Converter Monitoring | Transmission Control Units |
|
Use Scenario: Input/output current sensing in 600-W isolated DC/DC converters used in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: High-side current monitor with –4 V to +80 V common-mode range, interfacing to isolated sigma-delta ADC via REF1/REF2 biasing. Use Value: System-calibrated 100 mV/A gain and 0.1% shunt tolerance reduce calibration overhead in production test, cutting test time by 35% versus discrete solutions. |
Use Scenario: Clutch and torque converter solenoid current monitoring in 8-speed automatic transmissions with CAN-based ECU communication. IC Role / Device Role / Timing Role: Ratiometric current sensor using REF1/REF2 to generate fault-tolerant output aligned with MCU reference voltage - immune to supply ripple. Use Value: ±15-A continuous rating and 125°C operation allow direct placement on transmission control board, eliminating remote sensing wiring and connector losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Separate 20-V max common-mode range; requires external shunt; 100 mV/A gain; AEC-Q100 qualified. | Designed for automotive battery management where integrated shunt is not required and lower voltage rails dominate. | Select when AEC-Q100 compliance is mandatory and system already uses precision external shunts with known thermal layout. |
| INA286AIDR | 80-V common-mode range but no integrated shunt; 200 mV/A gain; higher offset drift (1.5 µA/°C); SOIC-8 package. | Targeted at cost-sensitive industrial power supplies needing basic high-side sensing without Kelvin routing complexity. | Choose for legacy SOIC footprint compatibility and when PCB space allows external 2-mΩ shunt with 4-wire layout. |
Compared with INA253A1IPW, INA240A1QDRQ1 offers automotive qualification but lacks integrated shunt and PWM rejection; INA286AIDR provides same voltage range but requires external precision resistor and delivers lower accuracy in thermally varying environments.
Availability
INA253A1IPW is available at Aetrix Electronics and suitable for motor control systems, solenoid actuation, and DC/DC converter monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for industrial and automotive programs.
Supply support for INA253A1IPW 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 conditioning and power management ICs.
The INA253 product line was designed specifically for high-accuracy, high-reliability current sensing in motor drives, solenoid controls, and power conversion - integrating precision resistive elements and zero-drift amplifiers into single-package solutions.
FAQ
What is the maximum continuous current rating for the INA253A1IPW?
The INA253A1IPW supports ±15 A continuous current from –40°C to +85°C ambient temperature. At higher ambient temperatures up to +125°C, the rating derates to ±10 A to maintain safe junction temperature. This rating applies to the integrated 2-mΩ shunt and accounts for total package resistance of 4.5 mΩ - including both precision shunt and interconnect paths. The device's thermal design enables direct mounting on motor-control PCBs without heatsinks under typical airflow conditions.
How does the INA253A1IPW achieve enhanced PWM rejection?
The INA253A1IPW achieves enhanced PWM rejection through proprietary internal circuitry that actively suppresses large dv/dt common-mode transients before they reach the amplifier core. Unlike conventional current-sense amplifiers relying solely on high bandwidth, it combines high AC CMRR (90 dB at 50 kHz) with optimized internal node shielding and timing alignment - enabling stable output even during 50-V/ns switching transients in BLDC inverter half-bridges. This eliminates need for external RC filters that degrade bandwidth and introduce phase lag.
Can the integrated shunt resistor in the INA253A1IPW be used independently of the amplifier?
No - the integrated 2-mΩ shunt resistor in the INA253A1IPW is not intended for standalone use. When used without the onboard amplifier, its tolerance degrades to approximately ±5%, and its temperature coefficient becomes uncontrolled. The device is system-calibrated with the amplifier to deliver 0.1% shunt tolerance and 10 ppm/°C tempco only when both elements operate together. TI explicitly states the shunt must be used with the internal amplifier to meet published gain and accuracy specifications.
What is the purpose of the REF1 and REF2 pins on the INA253A1IPW?
The REF1 and REF2 pins on the INA253A1IPW set the output common-mode voltage level and enable ratiometric or bipolar operation. By applying equal voltages (e.g., VS/2) to both pins, the output centers at that voltage - supporting bidirectional current sensing with single-supply operation. Applying different voltages introduces programmable offset, allowing direct mapping to ADC input ranges. These pins also decouple output reference from supply rail noise, improving PSRR in noisy power environments.
Does the INA253A1IPW require external compensation components?
No - the INA253A1IPW is internally compensated and operates stably with capacitive loads up to 1 nF. Its 350-kHz bandwidth and 2.4-V/µs slew rate are fully characterized without external components. TI specifies that no external compensation network is needed for standard applications, including those driving 10-kΩ loads or interfacing directly to SAR ADC inputs. Layout best practices (short traces, solid ground plane) are sufficient to maintain stability and noise immunity.
INA253A1IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.4V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 350 kHz
- Current - Input Bias:
- 90 pA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
INA253A1IPW FAQ
1.How can I place an order for INA253A1IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for INA253A1IPW 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 INA253A1IPW reliable?
The price and inventory of INA253A1IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA253A1IPW is usually 5 days.
3.What payment methods are accepted for INA253A1IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA253A1IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA253A1IPW?
INA253A1IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA253A1IPW 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 INA253A1IPW?
For technical support, including INA253A1IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA253A1IPW requirements.
6.How does Aetrix verify that INA253A1IPW is sourced from the original manufacturer or authorized distributors?
All INA253A1IPW 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 INA253A1IPW meets industry standards.
7.What is the process for return or replacement of INA253A1IPW?
All INA253A1IPW units undergo pre-shipment inspection (PSI). If there is an issue with INA253A1IPW, 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 INA253A1IPW part is unused and in its original packaging.
Return procedure for INA253A1IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA253A1IPW Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
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…
