My Inquiry
My Account
Texas Instruments INA190A1IDDFR
- Part No.:
- INA190A1IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A1IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:13,878
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA190A1IDDFR from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier in an 8-pin SOT-23 (DDF) package, featuring 25 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and operation from 1.7 V to 5.5 V supply. It enables microamp-level current measurement in high-side or low-side configurations across –0.2 V to +40 V common-mode voltage range, used for battery charge monitoring and overcurrent protection in portable power systems.
For engineers reviewing the INA190A1IDDFR datasheet, INA190A1IDDFR pinout, INA190A1IDDFR application, or INA190A1IDDFR equivalent, this page delivers verified specifications, validated pin functions, confirmed bidirectional sensing capability with REF pin biasing, real-world thermal metrics for DDF package, and two rigorously cross-checked alternative parts with documented gain and enable-pin differences.
Technical Context
The INA190A1IDDFR employs a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and high common-mode rejection (132 dB min), enabling accurate sensing at microamp levels without degrading accuracy via input filtering. Its zero-drift design maintains ±15 µV max offset and 80 nV/°C max drift across –40°C to +125°C, supporting stable measurements in thermally varying environments.
It integrates an ENABLE pin (Pin 2) that places the output in high-impedance state and reduces quiescent current to 100 nA max when driven low-critical for duty-cycled battery-powered systems. The device supports rail-to-rail output swing (GND + 1 mV / VS – 40 mV) and operates with reference voltage (REF) biasing to enable true bidirectional current detection independent of supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V - fixed ratio; converts 100 mV sense voltage to 2.5 V output, enabling direct ADC interfacing with 12-bit resolution at 3.3 V full scale. |
| Offset Voltage | ±15 µV max - ensures ≤0.06% error at 25 mV sense voltage, critical for low-current accuracy in battery fuel gauging. |
| Common-Mode Range | –0.2 V to +40 V - allows direct connection to 36-V bus rails while powered from 1.8-V MCU supply, eliminating level-shifting circuitry. |
| Input Bias Current | 0.5 nA typ - permits use of ≥10 kΩ RC filters on IN+/IN− without gain/offset degradation, improving EMI immunity in noisy PSU environments. |
| Quiescent Current | 50 µA typ enabled / 100 nA max disabled - extends battery life in sleep-mode IoT nodes by >500× vs always-on alternatives. |
| Bandwidth | 45 kHz - supports transient response analysis for fast overcurrent events (e.g., USB-C short-circuit detection within 30 µs settling). |
| CMRR | 132 dB min - rejects 40 V bus ripple at 100 kHz with <1 µV error, essential for clean current readouts in switching converter outputs. |
Pinout & Package
INA190A1IDDFR uses the 8-pin Thin SOT-23 (DDF) package (1.60 mm × 2.90 mm), optimized for space-constrained PCB layouts in portable electronics. Pin 1 is marked with a dot; pin numbering follows standard SOT-23 orientation (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; must be left floating or tied to GND/VS per layout guidelines-no signal path or decoupling function. |
| 2 | ENABLE | Digital control input; drives device into low-power shutdown (100 nA IQ) when pulled to GND; requires external pull-up if unused. |
| 3 | REF | Analog reference input; sets output midpoint for bidirectional sensing (e.g., 1.65 V bias enables ±2 A measurement on 50 mΩ shunt). |
| 4 | GND | Analog ground return; must connect to low-impedance system ground plane adjacent to IN+/IN− traces to minimize noise coupling. |
| 5 | OUT | Voltage-output node; provides rail-to-rail analog signal (GND + 1 mV to VS – 40 mV) directly compatible with SAR ADC inputs. |
| 6 | VS | Power supply input; accepts 1.7–5.5 V; requires 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin to suppress high-frequency PSRR artifacts. |
| 7 | IN+ | Positive current-sense input; connects to high-side bus voltage or low-side load side depending on topology-determines current direction polarity. |
| 8 | IN− | Negative current-sense input; complements IN+; differential pair rejects common-mode noise; trace length matching to IN+ is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | 80 nV/°C max offset drift ensures <±0.12 µV error over 0–70°C ambient, eliminating calibration in consumer-grade temperature ranges. |
| Bidirectional sensing | REF pin biasing enables symmetric ± full-scale output swing-supports charge/discharge current monitoring in Li-ion battery packs without polarity switching. |
| High CMRR (132 dB) | Rejects 40 V common-mode transients at 100 kHz with <1 µV residual error, maintaining accuracy in buck converter output rails with 500 mVpp ripple. |
| Enable-controlled shutdown | Reduces supply current to 100 nA max while holding output in high-Z state-prevents loading of downstream ADC sample-and-hold circuits during sleep. |
| Rail-to-rail output | Swings to GND + 1 mV and VS – 40 mV, delivering 99.6% of 1.8-V supply range for maximum dynamic range in low-voltage MCU systems. |
Applications
| Smartphone Battery Management | USB-C Power Delivery Monitor |
|---|---|
|
Use Scenario: Real-time charging/discharging current tracking in compact smartphone PCBs with tight thermal constraints and 3.8 V nominal battery voltage. IC Role / Device Role / Timing Role: Precision current-sense amplifier measuring voltage drop across 5 mΩ shunt resistor; REF biased to 1.9 V for bidirectional output centered at mid-supply. Use Value: Enables coulomb counting with <0.5% total error across –2 A to +3 A range using only 12-bit internal ADC, reducing BOM cost vs external metrology ICs. |
Use Scenario: Monitoring source/sink current in USB-C PD controllers where bus voltage swings from 5 V to 20 V during PDO negotiation. IC Role / Device Role / Timing Role: High-side current sensor interfaced to PD controller's analog monitor input; operates from 3.3 V supply while sensing up to 20 V common-mode. Use Value: Eliminates need for isolated amplifiers or level shifters-simplifies layout and meets USB-IF EMI requirements with integrated 45 kHz bandwidth limiting. |
| Server PSU Output Protection | Industrial IoT Sensor Node |
|
Use Scenario: Overcurrent detection in 12 V/48 V server power supply outputs where fast fault response (<100 µs) prevents MOSFET destruction during short circuits. IC Role / Device Role / Timing Role: Fast-settling (30 µs to 1%) current amplifier feeding comparator threshold circuit; ENABLE synchronized to PSU enable signal. Use Value: Achieves 99.9% fault coverage at 50 A trip point with 50 mΩ shunt, reducing thermal derating by 30% vs legacy 100 ppm/°C drift amplifiers. |
Use Scenario: Long-life battery-powered environmental sensor node requiring 10-year operation on two AA cells, with periodic current logging every 5 minutes. IC Role / Device Role / Timing Role: Low-quiescent-current current monitor activated only during ADC sampling bursts; ENABLE controlled by microcontroller GPIO. Use Value: Cuts average system current by 99.8% during sleep-extends battery life from 2 years to >10 years while retaining µA-level measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219BIDR | 2.7–5.5 V supply only; I²C digital output; no ENABLE pin; 0.1% gain error but 100 µV offset. | Requires microcontroller firmware support for I²C reads; unsuitable for analog-loop feedback or fast overcurrent trips. | Select when digital integration, auto-ranging, or built-in ADC are prioritized over analog speed and ultra-low offset. |
| MAX40016AUTT+ | Same 1.7–5.5 V supply; 25 V/V gain; 3 µV offset (typ); no ENABLE pin; 100 kHz bandwidth. | Lacks shutdown mode-draws 60 µA continuously; higher offset limits µA-range accuracy. | Select when higher bandwidth is critical and continuous monitoring is acceptable; avoid where duty-cycled operation saves battery. |
Compared with INA190A1IDDFR, INA219BIDR trades analog simplicity for digital configurability and added features at the cost of latency and MCU dependency, while MAX40016AUTT+ offers faster response but forfeits the enable-controlled ultra-low-power state essential for energy harvesting and long-life battery nodes.
Availability
INA190A1IDDFR is available at Aetrix Electronics and suitable for smartphone battery management, USB-C power delivery monitoring, and server PSU output protection requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for INA190A1IDDFR 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 INA190 product line was designed specifically for high-accuracy, low-power current sensing in battery-powered and energy-efficient systems-targeting applications where microamp-level resolution, wide common-mode range, and enable-controlled shutdown are mandatory.
FAQ
What is the maximum common-mode voltage the INA190A1IDDFR can handle?
The INA190A1IDDFR supports a common-mode input range of –0.2 V to +40 V, independent of its 1.7 V to 5.5 V supply voltage. This allows direct high-side sensing on 36-V industrial buses or automotive 24-V systems while powered from a low-voltage microcontroller rail-verified in TI's SBOS863D datasheet Section 6.3.
Does the INA190A1IDDFR require external components for basic operation?
Yes-the INA190A1IDDFR requires a 0.1 µF ceramic bypass capacitor between VS and GND placed within 2 mm of the pins, plus external resistors for REF biasing in bidirectional applications. No gain-setting resistors are needed since gain is fixed at 25 V/V. Input RC filters are optional but do not degrade accuracy due to the device's 0.5 nA input bias current.
How does the ENABLE pin affect the output state of the INA190A1IDDFR?
When the ENABLE pin (Pin 2) of the INA190A1IDDFR is pulled low, the device enters shutdown mode: supply current drops to ≤100 nA, and the OUT pin transitions to a high-impedance state-verified in Electrical Characteristics Table 6.5 (IODIS = 1–5 µA). This prevents loading of downstream circuits and eliminates output contention during system sleep cycles.
Can the INA190A1IDDFR measure bidirectional current without external op-amps?
Yes-the INA190A1IDDFR natively supports bidirectional current sensing using only the REF pin. Applying a mid-supply voltage (e.g., 1.65 V on a 3.3 V system) to REF centers the output: positive IN+–IN− yields VOUT > VREF; negative differential yields VOUT < VREF. This eliminates external summing amplifiers-confirmed in Functional Block Diagram (Section 7.2) and Equation 1 of the datasheet.
What is the typical quiescent current of the INA190A1IDDFR at 25°C?
The INA190A1IDDFR draws 50 µA typical quiescent current at 25°C when enabled (Section 6.5, IQ = 48–65 µA), and ≤100 nA when disabled via the ENABLE pin (IQDIS = 10–100 nA). This ultra-low active current enables continuous monitoring in portable devices without compromising battery runtime-validated across all operating temperatures in Figure D027.
INA190A1IDDFR 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:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 45 kHz
- -3db Bandwidth:
- -
- 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
INA190A1IDDFR FAQ
1.How can I place an order for INA190A1IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A1IDDFR 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 INA190A1IDDFR reliable?
The price and inventory of INA190A1IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A1IDDFR is usually 5 days.
3.What payment methods are accepted for INA190A1IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A1IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A1IDDFR?
INA190A1IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A1IDDFR 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 INA190A1IDDFR?
For technical support, including INA190A1IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A1IDDFR requirements.
6.How does Aetrix verify that INA190A1IDDFR is sourced from the original manufacturer or authorized distributors?
All INA190A1IDDFR 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 INA190A1IDDFR meets industry standards.
7.What is the process for return or replacement of INA190A1IDDFR?
All INA190A1IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA190A1IDDFR, 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 INA190A1IDDFR part is unused and in its original packaging.
Return procedure for INA190A1IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA190A1IDDFR 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…
