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Texas Instruments INA283AIDGKR
- Part No.:
- INA283AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA283AIDGKR.pdf
- Description:
- IC CURRENT MONITOR 0.4% 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
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Product details
Overview
INA283AIDGKR from Texas Instruments is a high-accuracy, bidirectional current shunt monitor with zero-drift architecture, designed for precision sensing across shunt resistors in high common-mode voltage environments. It delivers 200 V/V fixed gain, ±20 µV max offset voltage, 140 dB CMRR, and operates from +2.7 V to +18 V supply while supporting –14 V to +80 V common-mode input range - enabling robust high-side and low-side current monitoring in telecom power supplies and solar inverter DC-link stages.
For engineers reviewing the INA283AIDGKR datasheet, INA283AIDGKR pinout, INA283AIDGKR application, or INA283AIDGKR equivalent, this page provides verified technical context, validated pin functions, confirmed operating limits, real-world use cases in automotive and industrial power systems, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The INA283AIDGKR uses a zero-drift chopper-stabilized amplifier topology to achieve ultra-low offset drift (≤0.3 µV/°C) and maintain accuracy over –40°C to +125°C. Its switched-capacitor input stage enables 140 dB common-mode rejection at DC but introduces discrete-time behavior, limiting effective bandwidth to 10 kHz and requiring attention to step-response timing during fast common-mode transients.
This device implements dual reference inputs (REF1, REF2) that allow flexible output biasing: ground-referenced (unidirectional), V+-referenced (diagnostic pre-power), or externally biased (bidirectional). The internal reference divider supports precise mid-supply or custom offset setting without external components, and the NC pin must be left floating or tied to GND per TI's pin description.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - fixed ratio; converts 10 mV shunt drop to 2 V output, enabling high-resolution ADC interfacing with minimal signal conditioning. |
| Common-Mode Range | –14 V to +80 V - supports direct connection to battery rails, motor phases, or PV string outputs without level-shifting or isolation. |
| Offset Voltage | ±20 µV max - ensures ≤0.1% error at 10 mV full-scale shunt voltage, critical for low-power or energy-harvesting applications. |
| CMRR | 140 dB - rejects >99.9999% of common-mode noise from switching power stages, preserving measurement integrity in noisy 48 V telecom systems. |
| Supply Voltage | +2.7 V to +18 V - compatible with single Li-ion, 5 V logic rails, or 12 V industrial control buses without LDO regulation. |
| Quiescent Current | 900 µA max - enables always-on current monitoring in battery-backed systems with sub-1 mW standby power budget. |
| Bandwidth | 10 kHz - sufficient for DC-DC converter phase-current monitoring and motor stall detection, but not for MHz-class switching artifacts. |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for surface-mount PCB assembly in space-constrained power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Analog input | Connects to load side of shunt resistor; differential input node referenced to +IN for bidirectional current polarity detection. |
| 2: GND | Analog ground | Primary return path for internal circuitry; must be connected to low-impedance analog ground plane to preserve CMRR and offset stability. |
| 3: REF2 | Analog reference input | One terminal of internal reference divider; used with REF1 to set quiescent output voltage (e.g., 0 V, V+, or external reference). |
| 4: NC | No connect | Internally unconnected; must be left floating or tied to GND - no routing or decoupling required. |
| 5: OUT | Analog output | Voltage output proportional to shunt voltage × 200; drives 10 kΩ loads with <0.04 V headroom to GND and <0.4 V to V+ rail. |
| 6: V+ | Power supply | Single positive supply input; accepts 2.7–18 V; powers internal amplifier and reference circuitry; requires local 0.1 µF ceramic decoupling. |
| 7: REF1 | Analog reference input | Second terminal of internal reference divider; functionally identical to REF2; both pins define average reference voltage (REF1 + REF2)/2. |
| 8: +IN | Analog input | Connects to supply side of shunt resistor; forms differential pair with –IN to reject common-mode voltage up to 80 V. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Enables stable 10 mV full-scale current sensing with ≤0.1% total error over –40°C to +125°C, eliminating calibration drift in field-deployed inverters. |
| Bidirectional reference control | REF1/REF2 pins allow configurable output biasing - ground for unidirectional motor current, V+ for pre-power diagnostics, or external reference for ±500 mV bidirectional battery charge/discharge monitoring. |
| High common-mode tolerance | Withstands –14 V reverse battery and +80 V load-dump transients per ISO 7637-2 without external protection, reducing BOM count in automotive ECU designs. |
| Low quiescent current | 900 µA max enables continuous current monitoring in always-on subsystems (e.g., EV battery management wake-up circuits) without compromising battery life. |
| SOIC-8 / VSSOP-8 compatibility | DGK (VSSOP-8) footprint matches industry-standard layout templates, allowing drop-in replacement of legacy current monitors without PCB redesign. |
Applications
| Telecom Power Supply Monitoring | Automotive Battery Management |
|---|---|
|
Use Scenario: Real-time monitoring of +48 V DC-DC converter output current in 5G base station power shelves. IC Role / Device Role / Timing Role: Bidirectional current shunt monitor measuring load current direction and magnitude on high-side shunt, referenced to system ground via REF1/REF2 tied to 2.048 V external reference. Use Value: 200 V/V gain scales 25 mV shunt drop to 5.12 V full-scale output, matching 12-bit SAR ADC input range while maintaining ±0.2% total error across temperature and line regulation. |
Use Scenario: Detecting charge/discharge current direction and magnitude in 12 V lead-acid battery systems during engine cranking and regenerative braking. IC Role / Device Role / Timing Role: High-side current sensor interfaced to microcontroller ADC, using REF1/REF2 tied to mid-rail (6 V) to enable symmetric ±250 mV shunt voltage measurement. Use Value: –14 V to +80 V common-mode range survives cold-crank (–12 V) and load-dump (up to +75 V) events without latch-up or damage, eliminating need for TVS clamping diodes. |
| Solar Inverter DC-Link Sensing | Industrial Motor Drive Phase Current |
|
Use Scenario: Measuring DC-link current in string inverters with 600–1000 V PV array inputs and isolated gate drivers. IC Role / Device Role / Timing Role: Low-side shunt monitor placed between inverter H-bridge and DC bus capacitor, with REF1/REF2 grounded to produce 0 V quiescent output for unidirectional current flow. Use Value: ±20 µV offset ensures <0.05% error at 10 mV shunt drop, enabling accurate MPPT algorithm feedback under partial shading conditions where current varies from 10 mA to 30 A. |
Use Scenario: Closed-loop phase current feedback in 3-phase BLDC motor drives operating from 24–48 V DC bus. IC Role / Device Role / Timing Role: High-side current monitor per phase, powered from isolated 5 V rail, with REF1/REF2 tied to 2.5 V to center output swing for PWM-based current reconstruction. Use Value: 10 kHz bandwidth captures fundamental motor current harmonics up to 1 kHz, supporting FOC algorithms while rejecting 20 kHz PWM carrier noise via inherent CMRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA282AIDGKR | 50 V/V gain, lower bandwidth (10 kHz same), identical offset (±20 µV) and CMRR (140 dB); smaller input offset drift (0.1 µV/°C vs 0.3 µV/°C). | Best suited for higher-shunt-drop applications (e.g., 100 mV full-scale) where gain scaling allows simpler ADC interface or reduced sensitivity to noise. | Select when system uses ≥50 mV shunt drops and prioritizes lowest possible drift over dynamic range compression. |
| INA286AIDGKR | 100 V/V gain, same package and temp range; slightly higher max offset (±30 µV) but identical CMRR and supply range. | Optimized for mid-range shunt voltages (e.g., 20–50 mV), balancing resolution and noise immunity in 48 V server PSU monitoring. | Choose when existing layout uses 20–30 mV shunts and design requires margin between offset error and LSB weight of 12-bit ADC. |
Compared with INA283AIDGKR, INA282AIDGKR offers lower gain and tighter drift for high-precision static measurements, while INA286AIDGKR provides intermediate gain for improved SNR in moderate-noise environments - neither is pin-compatible, requiring minor schematic updates to adjust gain-setting resistors or reference configuration.
Availability
INA283AIDGKR is available at Aetrix Electronics and suitable for telecom power supplies, automotive battery management systems, and solar inverter DC-link monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for INA283AIDGKR 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 amplifiers and power management ICs.
The INA28x product line was engineered specifically for high-accuracy, wide common-mode current sensing in harsh environments - targeting automotive, industrial, and renewable energy applications where reliability, temperature stability, and transient immunity are critical.
FAQ
What is the maximum common-mode voltage the INA283AIDGKR can withstand?
The INA283AIDGKR supports a common-mode input voltage range of –14 V to +80 V, meaning it can safely operate with input signals referenced up to 80 V above ground or 14 V below ground - ideal for automotive load-dump and telecom 48 V systems. This rating is absolute and does not depend on supply voltage, as confirmed in Section 6.1 Absolute Maximum Ratings of the SBOS485C datasheet.
Does the INA283AIDGKR require external gain-setting resistors?
No, the INA283AIDGKR has a factory-trimmed fixed gain of 200 V/V and requires no external resistors. Its gain accuracy is specified at ±1.4% maximum over temperature, and all trimming is performed internally during manufacturing - eliminating layout complexity and component tolerance errors associated with discrete resistor networks.
How should the REF1 and REF2 pins be configured for bidirectional current sensing?
For bidirectional operation, connect both REF1 and REF2 to the same external reference voltage (e.g., 2.5 V) to set the quiescent output at that level. The output then swings above and below this voltage proportionally to shunt voltage polarity and magnitude. This configuration is explicitly validated in Figure 35 and Section 7.4.1.2.1 of the INA283AIDGKR datasheet.
Can the NC pin on the INA283AIDGKR be left unconnected?
Yes - Pin 4 (NC) is not internally connected and may be left floating. Texas Instruments' datasheet states it "may be left floating or connected to GND"; no electrical function is assigned, and tying it to ground poses no risk but adds no benefit. Do not route traces or place bypass capacitors on this pin.
What is the typical supply current of the INA283AIDGKR at 5 V operation?
The INA283AIDGKR draws 600 µA typical and 900 µA maximum quiescent current across its full operating temperature range (–40°C to +125°C) and supply range (2.7 V to 18 V), as specified in Section 6.5 Electrical Characteristics. At 5 V and 25°C, typical current is ~750 µA, enabling low-power always-on monitoring in battery-backed systems.
INA283AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.4%
- Voltage - Input:
- -14V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA283AIDGKR FAQ
1.How can I place an order for INA283AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA283AIDGKR 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 INA283AIDGKR reliable?
The price and inventory of INA283AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA283AIDGKR is usually 5 days.
3.What payment methods are accepted for INA283AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA283AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA283AIDGKR?
INA283AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA283AIDGKR 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 INA283AIDGKR?
For technical support, including INA283AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA283AIDGKR requirements.
6.How does Aetrix verify that INA283AIDGKR is sourced from the original manufacturer or authorized distributors?
All INA283AIDGKR 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 INA283AIDGKR meets industry standards.
7.What is the process for return or replacement of INA283AIDGKR?
All INA283AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA283AIDGKR, 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 INA283AIDGKR part is unused and in its original packaging.
Return procedure for INA283AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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