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Texas Instruments INA225AQDGKRQ1
- Part No.:
- INA225AQDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA225AQDGKRQ1.pdf
- Description:
- IC CURRENT MONITOR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,895
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Product details
Overview
INA225AQDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40 °C to +125 °C) bidirectional current-sense amplifier with pin-selectable gains of 25/50/100/200 V/V, 0 V to 36 V common-mode input range, ±150 μV max offset voltage, and 250 kHz bandwidth at G = 25 V/V - used in automotive body control modules for high-accuracy shunt-based current monitoring.
For engineers reviewing the INA225AQDGKRQ1 datasheet, INA225AQDGKRQ1 pinout, INA225AQDGKRQ1 application, or INA225AQDGKRQ1 equivalent, this page delivers verified technical context, gain-select terminal behavior, bidirectional sensing capability with external reference support, and automotive-grade thermal and ESD specifications per AEC-Q100.
Technical Context
The INA225AQDGKRQ1 employs a zero-drift, chopper-stabilized architecture enabling ±0.15% max gain error over temperature at 25/50 V/V and 0.5 μV/°C max offset drift. Its four discrete gain states are set by digital logic levels on GS0/GS1 pins, supporting dynamic range adaptation without external components.
It operates from a single +2.7 V to +36 V supply, draws ≤350 μA quiescent current, and maintains 95–105 dB common-mode rejection across –40 °C to +125 °C. The device supports bidirectional current measurement via user-defined REF voltage (0 V to VS), enabling true zero-centered output swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-mode range | 0 V to 36 V - enables direct sensing on 12 V/24 V automotive battery rails without level-shifting. |
| Gain options | 25 / 50 / 100 / 200 V/V - selected via GS0/GS1 logic pins; supports 10 mV full-scale shunt sensing at highest gain. |
| Offset voltage (max) | ±150 μV - ensures <0.1% error at 150 mV differential input, critical for low-current precision in valve control. |
| Bandwidth @ G=25 | 250 kHz - supports fast transient detection in motor control feedback loops. |
| Quiescent current | 350 μA max - enables always-on current monitoring in low-power body electronics. |
| AEC-Q100 grade | Grade 1 (–40 °C to +125 °C) - qualified for under-hood and cabin applications including cluster and central control modules. |
| ESD rating | HBM ±2500 V, CDM ±1000 V - meets automotive robustness requirements for production environments. |
Pinout & Package
INA225AQDGKRQ1 is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained automotive PCBs and thermally coupled to the board via exposed pad (DGK variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Analog input | Connects to supply side of shunt resistor; accepts common-mode up to 36 V independent of VS. |
| 2 GND | Analog ground | Reference node for internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 VS | Power supply | Single supply input (2.7 V–36 V); powers all analog and digital functions including GS0/GS1 logic interface. |
| 4 OUT | Analog output | Voltage-output stage; swings within 5–10 mV of GND and up to VS – 0.2 V depending on REF and gain. |
| 5 GS0 | Digital input | Gain select bit 0; logic low/high relative to GND/VS sets gain per Table 7-3 (e.g., GS0=GND, GS1=VS → 50 V/V). |
| 6 GS1 | Digital input | Gain select bit 1; paired with GS0 to configure one of four factory-trimmed gain states. |
| 7 REF | Analog input | User-defined reference voltage (0 V to VS); determines output center point for bidirectional current sensing. |
| 8 IN− | Analog input | Connects to load side of shunt resistor; differential pair with IN+ measures shunt voltage drop. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable gain | Four factory-trimmed gains (25/50/100/200 V/V) configured statically or dynamically via GS0/GS1 - eliminates need for external gain-setting resistors or digital interfaces. |
| Bidirectional sensing | External REF input enables true bipolar output swing (e.g., REF = VS/2 yields ±2 V out for ±100 mV shunt drop) - essential for motor H-bridge and valve driver current direction detection. |
| Zero-drift architecture | 0.5 μV/°C max offset drift and ±150 μV max offset over full temperature range - maintains accuracy in engine bay thermal cycling without recalibration. |
| Automotive qualification | AEC-Q100 Grade 1, HBM ±2500 V, CDM ±1000 V - certified for safety-critical subsystems including lighting and body control modules. |
| Wide supply range | Operates from 2.7 V to 36 V - supports direct connection to 12 V battery rail with cold-crank tolerance down to 2.7 V. |
Applications
| Automotive Lighting | Body Control Module |
|---|---|
|
Use Scenario: Real-time LED headlamp current monitoring during PWM dimming and fault detection. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier measuring shunt voltage across high-side driver FETs. Use Value: Enables sub-1% current accuracy at 10 mV shunt drop using G = 200 V/V, reducing thermal stress on lighting drivers. |
Use Scenario: Load current supervision for door lock actuators, window lift motors, and mirror controls. IC Role / Device Role / Timing Role: Voltage-output current monitor interfacing directly to microcontroller ADC inputs. Use Value: 250 kHz bandwidth captures inrush transients; ±150 μV offset ensures reliable short-circuit detection below 50 mA. |
| Motor Control | Valve Control |
|
Use Scenario: Phase current sensing in 12 V BLDC fan or HVAC blower motor drives. IC Role / Device Role / Timing Role: High-CMRR shunt amplifier feeding motor control MCU with isolated current feedback. Use Value: 105 dB CMRR rejects battery ripple; 350 μA IQ allows continuous monitoring without compromising system efficiency. |
Use Scenario: Solenoid current profiling in fuel injector or transmission shift solenoid circuits. IC Role / Device Role / Timing Role: Precision bidirectional amplifier with REF pin tied to mid-rail for symmetric positive/negative current reporting. Use Value: 0.5 μV/°C drift prevents thermal-induced offset errors during extended engine runtime at 125 °C ambient. |
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 | Fixed gain (20 V/V), higher bandwidth (400 kHz), lower offset (±25 μV), but no programmable gain or REF pin. | Best for unidirectional, high-speed motor phase sensing where gain flexibility is unnecessary. | Select when fixed-gain simplicity and ultra-low offset outweigh need for bidirectionality or gain reconfiguration. |
| MAX40056ATA+T | Fixed gain (50 V/V), wider supply (2.7 V–60 V), integrated overvoltage protection, but no AEC-Q100 qualification. | Suitable for industrial 48 V systems; lacks automotive qualification and REF-based bidirectional support. | Choose for non-automotive 48 V battery monitoring where enhanced fault protection is prioritized over AEC-Q100 compliance. |
Compared with INA225AQDGKRQ1, INA240A1QDRQ1 offers superior speed and offset but sacrifices gain flexibility and bidirectional operation, while MAX40056ATA+T extends voltage range and adds protection but omits automotive qualification and REF-based centering - making INA225AQDGKRQ1 uniquely suited for AEC-Q100-compliant, software-configurable bidirectional sensing in 12/24 V vehicle networks.
Availability
INA225AQDGKRQ1 is available at Aetrix Electronics and suitable for automotive lighting, body control module, and motor control applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for INA225AQDGKRQ1 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 automotive IC design expertise and ISO/TS 16949-certified manufacturing.
The INA225-Q1 belongs to TI's automotive-qualified current-sense amplifier product line, engineered specifically for precision, high-CMRR, bidirectional shunt monitoring in harsh-temperature vehicle subsystems - including power distribution, actuator control, and lighting management.
FAQ
What is the maximum common-mode voltage supported by the INA225AQDGKRQ1?
The INA225AQDGKRQ1 supports a common-mode input voltage range of 0 V to 36 V, independent of its supply voltage (VS). This allows direct connection to 12 V or 24 V automotive battery rails without external level-shifting circuitry. The specification is guaranteed over the full operating temperature range (–40 °C to +125 °C) and applies to both IN+ and IN− terminals simultaneously.
How do I configure the gain settings on the INA225AQDGKRQ1?
The INA225AQDGKRQ1 uses two digital input pins - GS0 and GS1 - to select one of four factory-trimmed gains: 25 V/V (both pins grounded), 50 V/V (GS0 = GND, GS1 = VS), 100 V/V (GS0 = VS, GS1 = GND), or 200 V/V (both pins tied to VS). These pins accept standard CMOS logic levels referenced to the device's VS and GND, and configuration is latched on power-up or during operation.
Does the INA225AQDGKRQ1 support bidirectional current sensing?
Yes, the INA225AQDGKRQ1 supports true bidirectional current sensing via its REF pin. By applying a user-defined reference voltage (0 V to VS) to REF, the output voltage centers around that reference - enabling positive and negative differential inputs to produce corresponding above/below-REF outputs. This is essential for H-bridge motor control and solenoid valve drive applications.
What is the typical quiescent current consumption of the INA225AQDGKRQ1?
The INA225AQDGKRQ1 draws a maximum of 350 μA quiescent current across its full operating temperature range (–40 °C to +125 °C) and supply range (+2.7 V to +36 V). At +25 °C and +5 V supply, typical IQ is 300 μA. This ultra-low power enables always-on current monitoring in battery-sensitive automotive modules such as body control units.
Is the INA225AQDGKRQ1 qualified for automotive use?
Yes, the INA225AQDGKRQ1 is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C ambient), with HBM ESD classification Level 2 (±2500 V) and CDM classification C4B (±1000 V). It also includes functional safety documentation to support ISO 26262 ASIL-B system-level development - confirming its suitability for safety-critical automotive subsystems including lighting, cluster, and central control modules.
INA225AQDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- -
- Voltage - Input:
- 2.7V ~ 36V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA225AQDGKRQ1 FAQ
1.How can I place an order for INA225AQDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA225AQDGKRQ1 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 INA225AQDGKRQ1 reliable?
The price and inventory of INA225AQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA225AQDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA225AQDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA225AQDGKRQ1 transactions.
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4.How is shipping managed for INA225AQDGKRQ1?
INA225AQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA225AQDGKRQ1 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 INA225AQDGKRQ1?
For technical support, including INA225AQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA225AQDGKRQ1 requirements.
6.How does Aetrix verify that INA225AQDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA225AQDGKRQ1 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 INA225AQDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA225AQDGKRQ1?
All INA225AQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA225AQDGKRQ1, 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 INA225AQDGKRQ1 part is unused and in its original packaging.
Return procedure for INA225AQDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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