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Texas Instruments INA190A2NDDFREP
- Part No.:
- INA190A2NDDFREP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A2NDDFREP.pdf
- Description:
- ENHANCED PRODUCT, 40-V, BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,735
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Product details
Overview
INA190A2NDDFREP from Texas Instruments is a radiation-tolerant, bidirectional, zero-drift current-sense amplifier with 50 V/V fixed gain, −0.2 V to +40 V common-mode input range, ±15 µV max offset voltage, and 132 dB minimum CMRR. It operates from 1.7 V to 5.5 V supply, draws 50 µA typical quiescent current when enabled, and supports precision microamp-level current measurement in defense avionics power monitoring.
For engineers reviewing the INA190A2NDDFREP datasheet, INA190A2NDDFREP pinout, INA190A2NDDFREP application, or INA190A2NDDFREP equivalent, this page delivers verified electrical specs, SOT-23-8 pin functions, bidirectional sensing implementation guidance, and qualified aerospace-grade alternatives - all aligned to TI's SBOSA74 production data sheet.
Technical Context
The INA190A2NDDFREP employs a capacitively coupled front-end architecture that blocks DC common-mode voltage while delivering 132 dB minimum CMRR and 80 nV/°C max offset drift. Its zero-drift core enables stable microamp-range sensing across −55°C to +150°C without calibration.
This device integrates an enable-controlled shutdown mode (0.1 µA max IQDIS), rail-to-rail output swing (VS − 40 mV / GND + 1 mV), and REF-pin-biased bidirectional operation - allowing symmetric ±200 mV output swing around VREF for true current direction detection in high-reliability power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed ratio enabling direct conversion of 20-mV shunt drop to 1-V output for ADC interfacing |
| Common-mode range | −0.2 V to +40 V - supports high-side sensing on 36-V bus rails independent of 1.7–5.5-V supply |
| Offset voltage | ±15 µV max - ensures <1% error at 1.5-mA load with 10-Ω shunt, critical for low-power system optimization |
| CMRR | 132 dB min - rejects bus transients and ground bounce in radar power supplies without signal degradation |
| Quiescent current | 50 µA typ enabled / 0.1 µA max disabled - extends battery life in intermittent-monitoring munitions telemetry |
| Input bias current | ±0.5 nA typ - permits use of ≥1-kΩ sense resistors for sub-µA current resolution without loading error |
| Bandwidth | 37 kHz typ (A2) - supports closed-loop response in thermal imaging heater control with <30-µs settling |
Pinout & Package
SOT-23-8 (DDF) package: 1.60 mm × 2.90 mm body, 0.65-mm pitch, surface-mount, thermally enhanced for high-reliability PCB layouts in constrained aerospace modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS (Pin 1) | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and enable logic; decoupling required within 2 mm |
| ENABLE (Pin 2) | Digital control input | Drives high (>0.7×VS) to enable; drives low (<0.3×VS) to disable output and reduce IQ to ≤0.1 µA |
| REF (Pin 3) | Bidirectional offset reference | Set to VS/2 for ± full-scale output; grounded for unidirectional 0–VS output; must be buffered |
| GND (Pin 4) | Analog ground reference | Return path for IN±, OUT, and REF; requires dedicated low-impedance plane under DDF footprint |
| OUT (Pin 5) | Analog voltage output | Rail-to-rail output (GND+1 mV to VS−40 mV); drives 10-kΩ loads; stable with ≤1-nF capacitive load |
| NC (Pin 6) | No-connect terminal | Not internally bonded; float or tie to GND/VS per layout best practice; no electrical function |
| IN+ (Pin 7) | Current-sense positive input | Connect to bus side of shunt in high-side config; load side in low-side config; 50-pA leakage |
| IN− (Pin 8) | Current-sense negative input | Connect to load side of shunt in high-side config; ground side in low-side config; matched to IN+ |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates thermal drift-induced errors in extended temperature cycling (−55°C to +150°C) |
| Capacitively coupled input stage | Blocks DC common-mode voltage, enabling 132 dB CMRR and immunity to bus rail shifts |
| Bidirectional sensing via REF pin | Enables single-supply detection of forward/reverse current flow without external op-amps |
| Ultra-low input bias current | ±0.5 nA typ allows >1-kΩ shunt resistors for µA-level resolution without gain error |
| Extended temperature qualification | Specified over −55°C to +150°C with controlled baseline, traceability, and extended lifecycle support |
Applications
| Avionics Power Monitoring | Radar System Protection |
|---|---|
Use Scenario: Real-time current monitoring of 28-V aircraft bus feeders feeding flight control actuators. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring bidirectional fault currents with ±100-µA resolution. Use Value: Enables early detection of partial short circuits before thermal runaway, meeting DO-160 Section 22 surge immunity requirements. |
Use Scenario: Overcurrent protection for T/R module DC-DC converters in airborne AESA radar systems. IC Role / Device Role / Timing Role: Low-latency current monitor triggering shutdown within 100 µs of >120% rated current. Use Value: Prevents catastrophic failure during RF transmit bursts by detecting transient overloads exceeding 5-A peak. |
| Smart Munitions Firing Circuit | Thermal Imaging Camera Power |
Use Scenario: Verifying safe arming sequence current signature in guided weapon pyro-initiation circuits. IC Role / Device Role / Timing Role: Precision unidirectional current sensor validating 250-mA firing pulse integrity pre-launch. Use Value: Guarantees mission-critical actuation by rejecting EMI from nearby RF jammers during ground check. |
Use Scenario: Regulated current control for microbolometer array bias in cooled infrared cameras. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier measuring 1.2-A heater current with <0.01% line regulation error. Use Value: Maintains <±5 mK thermal stability across −40°C to +70°C ambient, preserving image SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QPWRQ1 | Automotive AEC-Q100 Grade 1; 50 V/V gain; 4 V to 80 V common-mode; 120 µA IQ | Qualified for automotive under-hood use; lacks −55°C rating and EP traceability | Select for cost-sensitive ground vehicle systems where extended temperature and defense traceability are not required |
| INA186A2IDDFR | Commercial temp grade (−40°C to +125°C); same SOT-23-8 package; 50 V/V; 100 µA IQ | Not radiation-hardened or extended-lifecycle qualified; lower CMRR (120 dB min) | Use only in non-safety-critical industrial prototypes where full EP specifications are unnecessary |
Compared with INA240A2QPWRQ1 and INA186A2IDDFR, the INA190A2NDDFREP uniquely delivers −55°C to +150°C operation, 132 dB CMRR, and defense-grade traceability - making it irreplaceable in space-constrained, mission-critical avionics and munitions where reliability outweighs cost.
Availability
INA190A2NDDFREP is available at Aetrix Electronics and suitable for avionics power monitoring, radar system protection, and smart munitions firing circuits requiring stable component supply across extended temperature and long product lifecycles.
Supply support for INA190A2NDDFREP 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 heritage in high-reliability aerospace and defense components.
The INA190-EP product line was engineered specifically for extreme-environment current sensing in defense, avionics, and medical systems - delivering guaranteed performance from −55°C to +150°C with full process traceability and extended lifecycle support.
FAQ
What is the maximum common-mode voltage the INA190A2NDDFREP can handle?
The INA190A2NDDFREP supports a common-mode input voltage range of −0.2 V to +40 V, independent of its 1.7–5.5-V supply voltage. This allows direct high-side sensing on 36-V aircraft buses without level-shifting circuitry. The specification is guaranteed over the full −55°C to +150°C operating temperature range and validated per TI's SBOSA74 production data sheet.
Does the INA190A2NDDFREP support bidirectional current sensing?
Yes, the INA190A2NDDFREP supports true bidirectional current sensing via its REF pin. When a reference voltage (e.g., VS/2) is applied to REF, the output swings symmetrically above and below that voltage based on current direction - enabling detection of both charge and discharge currents in smart munitions battery management. This functionality is inherent to the device architecture and requires no external components.
What is the gain accuracy and drift specification for the INA190A2NDDFREP?
The INA190A2NDDFREP has a guaranteed gain error of ±0.3% maximum over temperature and a gain drift of 7 ppm/°C maximum. These values are specified for the A2 variant (50 V/V) in TI's SBOSA74 datasheet and apply across the full −55°C to +150°C range. The low drift ensures consistent scaling between shunt voltage and output across thermal cycling in avionics enclosures.
How does the ENABLE pin function on the INA190A2NDDFREP?
The ENABLE pin on the INA190A2NDDFREP controls device power state: driving it to VS enables normal operation (50 µA IQ typical); driving it to GND disables the amplifier, reducing supply current to ≤0.1 µA and placing OUT in high-impedance state. Input hysteresis (300 mV) prevents chatter near switching thresholds, and the pin must be actively driven - floating is not permitted per TI's recommended operating conditions.
Is the INA190A2NDDFREP pin-compatible with other variants in the INA190-EP family?
Yes, all INA190-EP variants - including INA190A1NDDFREP, INA190A2NDDFREP, INA190A3NDDFREP, INA190A4NDDFREP, and INA190A5NDDFREP - share identical SOT-23-8 (DDF) packaging and pinout. Gain selection is factory-set; no external configuration is needed. This allows design reuse across current-range requirements while maintaining board layout compatibility and thermal profile consistency.
INA190A2NDDFREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 37 kHz
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 3 µV
- Current - Supply:
- 48µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
INA190A2NDDFREP FAQ
1.How can I place an order for INA190A2NDDFREP through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A2NDDFREP 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 INA190A2NDDFREP reliable?
The price and inventory of INA190A2NDDFREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A2NDDFREP is usually 5 days.
3.What payment methods are accepted for INA190A2NDDFREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A2NDDFREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A2NDDFREP?
INA190A2NDDFREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A2NDDFREP 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 INA190A2NDDFREP?
For technical support, including INA190A2NDDFREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A2NDDFREP requirements.
6.How does Aetrix verify that INA190A2NDDFREP is sourced from the original manufacturer or authorized distributors?
All INA190A2NDDFREP 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 INA190A2NDDFREP meets industry standards.
7.What is the process for return or replacement of INA190A2NDDFREP?
All INA190A2NDDFREP units undergo pre-shipment inspection (PSI). If there is an issue with INA190A2NDDFREP, 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 INA190A2NDDFREP part is unused and in its original packaging.
Return procedure for INA190A2NDDFREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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