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Texas Instruments INA205AIDGSR
- Part No.:
- INA205AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA205AIDGSR.pdf
- Description:
- IC CURRENT MONITOR 3.5% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,245
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Product details
Overview
INA205AIDGSR from Texas Instruments is a unidirectional current-shunt monitor IC with 100 V/V gain, dual open-drain comparators (one latching, one with user-programmable delay), and integrated 1.2-V reference output. It operates from 2.7 V to 18 V supply, supports –16 V to 80 V common-mode input range, delivers 500-kHz bandwidth, and is specified for –40°C to 125°C operation in power management and battery charger systems.
For engineers reviewing the INA205AIDGSR datasheet, INA205AIDGSR pinout, INA205AIDGSR application, or INA205AIDGSR equivalent, this page provides verified functional role, validated package mapping (VSSOP-10), confirmed comparator timing behavior, exact gain accuracy (±1% gain error), and real-world use-value metrics including 2.2-mA quiescent current and ±3.5-mV offset voltage over temperature.
Technical Context
The INA205AIDGSR implements a high-side current sensing architecture with RTI (referred-to-input) offset voltage of ±3.5 mV over –40°C to 125°C and CMRR of 100–123 dB across its –16 V to 80 V common-mode range. Its 100 V/V fixed gain path achieves 200-kHz bandwidth (CLOAD = 5 pF), while maintaining 1.3-μs typical comparator response time and 590–625 mV threshold tolerance over temperature.
It integrates two independent open-drain comparators: Comparator 1 features internal latch with active-low reset (CMP1 RESET), and Comparator 2 supports external RC delay programming via CMP2 DELAY pin (tD = 5 × CDELAY). The 10-pin VSSOP package omits pins 3, 6, 9, 12 - removing 0.6-V reference override capability and 1.2-V REF OUT - distinguishing it functionally from 14-pin SOIC/TSSOP variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - scales shunt voltage drop linearly to full-scale output; enables precise low-current detection with 10-mV sense input yielding 1-V output. |
| Common-Mode Range | –16 V to 80 V - supports high-side sensing in automotive 12-V/24-V, telecom 48-V, and industrial 72-V bus applications without level-shifting. |
| Bandwidth | 200 kHz - sufficient for switching power supply current monitoring up to 100-kHz PWM frequencies with <2% gain error. |
| Quiescent Current | 1.8–2.2 mA - enables continuous monitoring in always-on battery-powered systems with predictable power budgeting. |
| Output Offset Voltage | ±3.5 mV over –40°C to 125°C - defines minimum resolvable shunt voltage (e.g., 35 μΩ at 100-A load) before calibration. |
| Comparator Threshold | 590–625 mV - sets overcurrent trip point with ±17.5 mV tolerance; used directly with shunt-derived voltage without external resistors. |
| Supply Voltage Range | 2.7 V to 18 V - compatible with single Li-ion (3.0–4.2 V), 5-V logic rails, and 12-V industrial supplies without regulators. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm body size), thermally enhanced for PCB-mounted current-sense applications; no exposed pad. Pinout optimized for minimal trace length between VIN+ and VIN– and shunt resistor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN+) | Current-sense high-side input | Connects directly to shunt resistor high side; tolerates up to 80 V common-mode voltage. |
| 2 (VIN–) | Current-sense low-side input | Connects directly to shunt resistor low side; forms differential input pair with VIN+. |
| 3 (CMP1 OUT) | Comparator 1 open-drain output | Latched fault signal; requires external pull-up; asserts low on overcurrent event until CMP1 RESET is pulsed. |
| 4 (CMP2 OUT) | Comparator 2 open-drain output | Programmable-delay fault signal; asserts low after configurable timeout following threshold breach. |
| 5 (CMP1 RESET) | Active-low latch reset | Pulse low ≥1.5 μs to clear CMP1 OUT latch; internal 2-MΩ pulldown holds reset inactive when floating. |
| 6 (VS) | Positive power supply | Accepts 2.7–18 V; powers all internal blocks including comparators and reference; bypass capacitor required. |
| 7 (OUT) | Analog output voltage | 100×(VIN+ − VIN–); rail-to-rail swing limited to (VS − 0.25 V) min / (GND + 4 mV) max at full temperature range. |
| 8 (CMP1 IN+) | Comparator 1 positive input | Accepts external threshold voltage; default operation uses internal 0.6-V reference tied to CMP2 IN–/0.6V REF. |
| 9 (CMP2 IN+) | Comparator 2 positive input | Accepts external threshold; used with internal 0.6-V reference on CMP2 IN–/0.6V REF for overcurrent detection. |
| 10 (GND) | Analog ground reference | Return path for VS, OUT, and comparator outputs; must be connected to system power ground with low-impedance trace. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100 V/V gain | Eliminates external gain-setting resistors; reduces BOM count and layout sensitivity in production designs. |
| Dual open-drain comparators | Enables independent fast overcurrent (CMP1) and delayed fault reporting (CMP2) on same die-no secondary IC needed. |
| Latching comparator with reset | Preserves fault state across power cycles or transient glitches; allows host MCU to acknowledge only when ready. |
| User-programmable comparator delay | Capacitor on CMP2 DELAY pin sets timeout (e.g., 0.1 μF = 0.5 s); prevents nuisance trips during inrush or soft-start. |
| –16 V to 80 V common-mode range | Supports direct high-side sensing in 12-V automotive, 48-V telecom, and 72-V industrial DC buses without isolation. |
Applications
| Battery Charger Protection | Telecom 48-V Power Shelf |
|---|---|
Use Scenario: Real-time monitoring of charging current in lithium-ion battery packs with overcurrent cutoff and thermal derating coordination. IC Role / Device Role / Timing Role: Current-shunt monitor providing analog output to ADC and dual comparators generating immediate latch (CMP1) and delayed alarm (CMP2) signals. Use Value: 100 V/V gain resolves 10-mA changes at 100-A full scale; ±3.5-mV offset ensures <0.5% error at 1-A charge current without calibration. |
Use Scenario: High-side current monitoring in redundant 48-V DC-DC converter modules within carrier-grade power shelves. IC Role / Device Role / Timing Role: Unidirectional shunt amplifier feeding system controller ADC while CMP1 triggers immediate shutdown and CMP2 initiates graceful load shedding. Use Value: –16 V to 80 V common-mode range accommodates negative rail transients and hot-swap surges; 200-kHz bandwidth captures switching ripple. |
| Automotive Body Control Module | Industrial Motor Drive Current Feedback |
Use Scenario: Fuseless short-circuit protection for 12-V lighting and actuator circuits in BCMs, replacing electromechanical fuses. IC Role / Device Role / Timing Role: High-side current sensor with latched fault output (CMP1) and programmable delay (CMP2) for selective circuit isolation. Use Value: CMP1 RESET pin enables MCU-controlled fault clearing; 1.3-μs comparator response detects sub-cycle shorts before wire damage occurs. |
Use Scenario: Phase current sensing in 3-phase BLDC motor drives where fast overcurrent detection prevents IGBT shoot-through. IC Role / Device Role / Timing Role: Analog current feedback to PWM controller plus dual comparator outputs for hardware-level emergency stop and thermal warning. Use Value: 2.2-mA quiescent current enables always-on monitoring; 100 V/V gain matches typical 5-mΩ shunts for 0–50-A range with 1-V full-scale output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA204AIDGSR | 50 V/V gain, 300-kHz bandwidth, identical pinout and comparator functionality | Better suited for higher-current, lower-precision applications where 20-mV shunt drop yields 1-V output | Select when shunt voltage headroom is constrained and ±2% total output error is acceptable. |
| INA206AIDRGR | 100 V/V gain, single comparator (non-latching), TDFN-8 package, no 1.2-V reference | Targeted at space-constrained, cost-sensitive applications requiring only one fault signal | Choose for compact layouts where latch functionality is unnecessary and board area is premium. |
Compared with INA205AIDGSR, INA204AIDGSR trades bandwidth and resolution for wider dynamic range, while INA206AIDRGR sacrifices latch/delay flexibility and reference output to reduce footprint and cost-neither offers drop-in replacement due to functional and package differences.
Availability
INA205AIDGSR is available at Aetrix Electronics and suitable for battery chargers, telecom power shelves, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for INA205AIDGSR 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 current sensing and power management ICs.
The INA20x family was designed specifically for high-voltage, high-accuracy current monitoring in power conversion, battery systems, and industrial controls-emphasizing robustness, integration, and ease of implementation in harsh environments.
FAQ
What is the maximum common-mode voltage supported by the INA205AIDGSR?
The INA205AIDGSR supports a common-mode input voltage range of –16 V to 80 V. This allows direct high-side current sensing in automotive 12-V/24-V systems, telecom 48-V power shelves, and industrial 72-V DC buses without external level-shifting circuitry. Operation at the extremes requires verification of input bias current and CMRR degradation per datasheet Section 6.5.
Does the INA205AIDGSR include an internal voltage reference?
The INA205AIDGSR does not provide a 1.2-V reference output - that feature is exclusive to the 14-pin SOIC and TSSOP packages (e.g., INA205AIDR). The VSSOP-10 variant (INA205AIDGSR) retains only the internal 0.6-V comparator reference, accessible at CMP2 IN–/0.6V REF. External reference routing is not supported in this package.
How is the comparator delay configured on the INA205AIDGSR?
The INA205AIDGSR does not support comparator delay - the CMP2 DELAY pin is absent in the VSSOP-10 package. Delay functionality is available only on 14-pin SOIC (D) and TSSOP (PW) variants. For INA205AIDGSR, Comparator 2 operates with fixed 1.3-μs response time and no programmable timeout.
What is the gain accuracy of the INA205AIDGSR over temperature?
The INA205AIDGSR has a gain error of ±1% (typical) at 25°C and ±2% over the full –40°C to 125°C operating range. Total output error, including offset contribution, is ±3.5% over temperature at VSENSE = 120 mV and VS = 16 V. These values are measured and production-tested per TI's SBOS393F datasheet Section 6.5.
Can the INA205AIDGSR be used for bidirectional current sensing?
No, the INA205AIDGSR is a unidirectional current-shunt monitor. Its architecture measures only positive differential voltage (VIN+ > VIN–) and cannot resolve reverse current flow. For bidirectional applications, TI recommends the INA226 or INA240 families, which support true bipolar input ranges and signed output encoding.
INA205AIDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3.5%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- 1mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA205AIDGSR FAQ
1.How can I place an order for INA205AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA205AIDGSR 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 INA205AIDGSR reliable?
The price and inventory of INA205AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA205AIDGSR is usually 5 days.
3.What payment methods are accepted for INA205AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA205AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA205AIDGSR?
INA205AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA205AIDGSR 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 INA205AIDGSR?
For technical support, including INA205AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA205AIDGSR requirements.
6.How does Aetrix verify that INA205AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA205AIDGSR 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 INA205AIDGSR meets industry standards.
7.What is the process for return or replacement of INA205AIDGSR?
All INA205AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA205AIDGSR, 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 INA205AIDGSR part is unused and in its original packaging.
Return procedure for INA205AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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