My Inquiry
My Account
Texas Instruments INA296A1IDR
- Part No.:
- INA296A1IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA296A1IDR.pdf
- Description:
- -5-V TO 110-V, BIDIRECTIONAL, 1.
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA296A1IDR from Texas Instruments is an ultra-precise, bidirectional current sense amplifier designed for high-voltage DC/DC converters and 48V battery management systems. It operates across a −5V to 110V common-mode range, delivers 1.1MHz bandwidth, 8V/µs slew rate, ±0.01% max gain error, and ±10µV max input offset voltage - enabling accurate low-side, high-side, or inline shunt measurements in fast transient detection and overcurrent protection circuits.
For engineers reviewing the INA296A1IDR datasheet, INA296A1IDR pinout, INA296A1IDR application, or INA296A1IDR equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for precision current sensing in 48V industrial and telecom power systems.
Technical Context
The INA296A1IDR uses a zero-drift, precision topology with fixed 10V/V gain to achieve ±10µV max input offset and ±0.01% max gain error across −40°C to 125°C. Its input bias current remains constant at 35µA (typ) up to 110V common-mode voltage - independent of VCM - unlike conventional high-voltage amplifiers.
It supports bidirectional operation via dual reference pins (REF1/REF2), allowing configurable output centering (e.g., mid-supply for bidirectional sensing). The 1.1MHz bandwidth and 1µs 1% settling time enable real-time monitoring of fast current transients in 48V PSU and RRU applications without signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10V/V - sets precise scaling between shunt voltage drop and output; enables direct interface with 12-bit+ ADCs using standard 50mΩ–500mΩ shunts. |
| Common-mode Range | −5V to 110V - supports high-side sensing in 48V/60V bus systems even during negative transients or cold-cranking events. |
| Input Offset Voltage | ±10µV max - ensures sub-1mA error in 100mΩ shunt at 0A, critical for low-current standby monitoring in BMS. |
| Bandwidth | 1.1MHz - captures >500kHz current harmonics in PWM-driven DC/DC stages; preserves fidelity for OCP response <1µs. |
| Slew Rate | 8V/µs - prevents output saturation during rapid load steps; maintains linearity for 10V output swing in <1.25µs. |
| Supply Range | 2.7V to 20V - decouples operation from bus voltage; allows use with 3.3V or 5V logic rails while monitoring 48V power paths. |
| CMRR | 166dB typ - rejects >99.99998% of 48V common-mode noise, eliminating need for guard traces or differential routing in dense PCB layouts. |
Pinout & Package
SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for high-power density designs. Pinout identical across DDF, DGK, and D packages per TI SBOSA04D Rev D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Current-sense positive input | Connect to bus side of shunt in high-side config; load side in low-side - defines polarity for bidirectional output swing. |
| IN− | Current-sense negative input | Connect to load side of shunt in high-side; ground side in low-side - differential pair with IN+ senses VSENSE. |
| GND | Ground reference | System ground return; required for REF1/REF2 bias network and output stage stability; must be low-impedance. |
| NC | No-connect terminal | Internally reserved; must be tied to GND per datasheet to ensure ESD robustness and thermal performance. |
| OUT | Analog output | Voltage = 10 × (VIN+ − VIN−) + (VREF1 + VREF2)/2; rail-to-rail capable with 20mV headroom to GND and 200mV to VS. |
| VS | Power supply | 2.7V–20V single supply; powers internal core and output stage; bypass with 100nF ceramic close to pin. |
| REF1 | Reference input 1 | Configures output DC level; paired with REF2 to set mid-point offset - e.g., REF1=VS, REF2=GND → VOUT = 10×VSENSE + VS/2. |
| REF2 | Reference input 2 | Matches REF1 electrically; no functional distinction - both feed same precision divider; enables unidirectional (GND- or VS-referenced) or bidirectional (mid-supply) modes. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift - maintains ±0.1µV/°C offset drift for stable calibration over full −40°C to 125°C range. |
| Bidirectional reference control | Dual REF1/REF2 pins allow flexible output centering without external op-amps - reduces BOM count and layout area in 48V server PSU designs. |
| Constant input bias current | 35µA (typ) independent of VCM - avoids gain error shift in high-common-mode applications where traditional amplifiers exhibit >100nA/V drift. |
| High-speed transient response | 1µs to 1% settling enables cycle-by-cycle overcurrent detection in synchronous buck controllers operating >500kHz. |
| Ultra-high CMRR | 166dB minimizes sensitivity to bus noise - permits placement near MOSFETs or inductors without shielding, simplifying thermal and EMI layout. |
Applications
| 48V DC/DC Converter | 48V Battery Management System |
|---|---|
|
Use Scenario: Real-time phase current monitoring in interleaved 48V–12V buck converters for AI servers. IC Role / Device Role / Timing Role: High-side current sense amplifier with 1.1MHz bandwidth feeding ADC for digital current loop control. Use Value: Enables <1µs fault response, reducing MOSFET stress during short-circuit events while maintaining ±0.5% full-scale accuracy across temperature. |
Use Scenario: Cell-string current measurement in 48V Li-ion rack BMS with active balancing. IC Role / Device Role / Timing Role: Bidirectional shunt monitor interfaced to isolated SPI ADC for charge/discharge current tracking. Use Value: ±10µV offset ensures <±0.1A error at 100mΩ shunt, supporting precise Coulomb counting and state-of-charge estimation. |
| Macro Remote Radio Unit | 48V Merchant Network Power Supply |
|
Use Scenario: PA bias current sensing in 5G massive MIMO RRUs with dynamic power scaling. IC Role / Device Role / Timing Role: Low-drift, high-CMRR amplifier capturing fast PA current pulses up to 1MHz. Use Value: 166dB CMRR rejects RF coupling from adjacent TX chains; 8V/µs slew rate preserves pulse shape for envelope tracking feedback. |
Use Scenario: Input/output current monitoring in multi-rail 48V merchant PSUs for datacenter switches. IC Role / Device Role / Timing Role: Precision current sensor on primary and secondary sides for efficiency optimization and fault logging. Use Value: Fixed 10V/V gain simplifies calibration across production; −5V to 110V range covers inrush, reverse-polarity, and brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1DR | Same 10V/V gain, but ±120µV max offset and 400kHz bandwidth; lower CMRR (150dB). | Acceptable for cost-sensitive 48V PSU where <1% current accuracy suffices and transients <250kHz dominate. | Select INA240A1DR only if 1.1MHz bandwidth and ±10µV offset are not required - saves ~15% BOM cost. |
| MAX40056ASA+ | 10V/V gain, ±5µV offset, but narrower −4V to 65V common-mode range and 2.5mA quiescent current. | Limited to 48V systems without negative transients or >65V surge tolerance; higher IQ increases thermal load in compact modules. | Choose MAX40056ASA+ only when ultra-low offset is critical and common-mode stays within −4V to 65V - verify survival during 120V surges. |
Compared with INA240A1DR and MAX40056ASA+, the INA296A1IDR uniquely combines 110V common-mode survival, 1.1MHz bandwidth, and ±10µV offset - making it the only option qualified for high-reliability 48V telecom and server applications demanding simultaneous precision, speed, and ruggedness.
Availability
INA296A1IDR is available at Aetrix Electronics and suitable for 48V DC/DC converters, 48V battery management systems, and macro remote radio units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for INA296A1IDR 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 high-voltage power management ICs.
The INA296x product line was engineered specifically for next-generation 48V power architectures - delivering ultra-precision current sensing with extended common-mode range, high speed, and robust thermal performance for telecom, server, and industrial applications.
FAQ
What is the maximum common-mode voltage the INA296A1IDR can survive?
The INA296A1IDR has a survival rating of −20V to 120V per absolute maximum ratings. This exceeds its operational range (−5V to 110V) and ensures robustness against load-dump transients, cold-cranking dips, and ESD-induced spikes in 48V automotive and industrial systems - critical for field reliability of INA296A1IDR deployments.
Can the INA296A1IDR measure bidirectional current with a single supply?
Yes. The INA296A1IDR supports true bidirectional sensing using its dual reference pins (REF1 and REF2). By setting REF1 = VS and REF2 = GND, the output centers at VS/2 - enabling positive current to raise and negative current to lower the output voltage relative to mid-supply, all with a single 2.7V–20V supply - a key capability of INA296A1IDR in BMS and RRU designs.
What shunt resistor value is recommended for use with the INA296A1IDR at 48V bus?
For a 48V system with ±50A measurement range and 5V ADC full-scale, a 10mΩ shunt yields ±500mV differential input, scaled to ±5V output by the INA296A1IDR's 10V/V gain. This maintains >12-bit ENOB while keeping I²R loss below 25W - a balanced choice validated in TI's INA296A1IDR reference designs for 48V DC/DC converters.
Does the INA296A1IDR require external compensation components?
No. The INA296A1IDR is internally compensated for unity-gain stability across all operating conditions. No external capacitors or resistors are needed for basic operation - simplifying layout and reducing bill-of-materials. However, a 100nF ceramic bypass capacitor on VS is mandatory per datasheet Section 8.3 to maintain PSRR and transient immunity for INA296A1IDR.
How does the INA296A1IDR handle input overvoltage beyond its common-mode range?
The INA296A1IDR includes integrated input protection that clamps IN+ and IN− to safe levels during brief overvoltage events. Per Absolute Maximum Ratings, it survives −20V to 120V continuously - meaning transient spikes up to 120V do not damage the device or induce latch-up. This ruggedness is confirmed in TI's INA296A1IDR ESD and surge test reports.
INA296A1IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.1 MHz
- Current - Input Bias:
- 35 µA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 2.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA296A1IDR FAQ
1.How can I place an order for INA296A1IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A1IDR 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 INA296A1IDR reliable?
The price and inventory of INA296A1IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A1IDR is usually 5 days.
3.What payment methods are accepted for INA296A1IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A1IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296A1IDR?
INA296A1IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A1IDR 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 INA296A1IDR?
For technical support, including INA296A1IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A1IDR requirements.
6.How does Aetrix verify that INA296A1IDR is sourced from the original manufacturer or authorized distributors?
All INA296A1IDR 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 INA296A1IDR meets industry standards.
7.What is the process for return or replacement of INA296A1IDR?
All INA296A1IDR units undergo pre-shipment inspection (PSI). If there is an issue with INA296A1IDR, 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 INA296A1IDR part is unused and in its original packaging.
Return procedure for INA296A1IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A1IDR 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…
