My Inquiry
My Account
Texas Instruments INA205AIDGST
- Part No.:
- INA205AIDGST
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA205AIDGST.pdf
- Description:
- IC CURRENT MONITOR 3.5% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:143
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA205AIDGST from Texas Instruments is a unidirectional current-shunt monitor IC with 100 V/V gain, dual open-drain comparators (CMP1 latched, CMP2 delay-programmable), and integrated 1.2-V reference output. It operates from 2.7 V to 18 V, supports common-mode voltages from –16 V to 80 V, and delivers 200-kHz bandwidth for precision shunt-based current sensing in high-side power rail monitoring.
For engineers reviewing the INA205AIDGST datasheet, INA205AIDGST pinout, INA205AIDGST application, or INA205AIDGST equivalent, this device is selected for high-accuracy overcurrent detection in telecom power supplies, battery chargers, and industrial DC power systems where wide common-mode range and comparator programmability are critical.
Technical Context
The INA205AIDGST implements a precision current-sense amplifier stage followed by two independent comparators: CMP1 features internal hysteresis and latch/reset control via dedicated pins, while CMP2 includes a user-configurable RC delay circuit (via external capacitor on CMP2 DELAY pin) and adjustable threshold referencing. Both comparators use internal 0.6-V references that can be overridden externally on 14-pin packages.
Its architecture enables simultaneous analog output (OUT pin, 100× VSENSE) and digital fault signaling (open-drain CMP1 OUT/CMP2 OUT), with full operation across –40°C to +125°C and quiescent current of 1.8 mA at 12 V supply - optimized for embedded power management where signal integrity and thermal robustness are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - scales 10–100 mV shunt voltage to 1–10 V output for direct ADC interfacing without amplification. |
| Common-Mode Range | –16 V to +80 V - enables high-side sensing in 48-V telecom, 60-V industrial, and negative-rail applications. |
| Bandwidth | 200 kHz - supports fast transient detection (e.g., short-circuit response within ~5 µs) in switching power supplies. |
| Comparator 1 Response Time | 1.3 µs (typ.) - ensures rapid overcurrent flag assertion with minimal latency before latch activation. |
| Reference Output | 1.2 V ±12 mV (±1%) - stable, low-drift reference for external circuit biasing or comparator threshold calibration. |
| Quiescent Current | 1.8 mA - enables low-power operation in always-on monitoring circuits without compromising speed or accuracy. |
| Accuracy (Total Output Error) | ±3.5% over temperature - guaranteed error budget includes gain, offset, and CMRR effects for production design margining. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm), thermally enhanced, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Current-sense high-side input | Connects directly to shunt resistor high terminal; tolerates up to +80 V common-mode voltage. |
| VIN− | Current-sense low-side input | Connects to shunt resistor low terminal; referenced to GND or negative rail; differential input with 18-V max swing. |
| OUT | Analog output | Voltage output = 100 × (VIN+ − VIN−); rail-to-rail capable with 1.5-Ω output impedance. |
| CMP1 IN+ | Comparator 1 non-inverting input | Accepts external threshold signal; default operation uses internal 0.6-V reference when unconnected. |
| CMP2 IN+ | Comparator 2 non-inverting input | Used for second overcurrent or voltage-monitoring threshold; compatible with 0–(VS − 1.5 V) input range. |
| GND | Analog ground reference | Primary return path for sense inputs, reference, and comparator outputs; requires low-impedance PCB connection. |
| VS | Power supply input | Single 2.7–18 V supply; bypass capacitor required at pin for stability and noise rejection. |
| CMP1 OUT | Open-drain latch output | Active-low fault flag; remains asserted until cleared by logic-low pulse on CMP1 RESET pin. |
| CMP2 OUT | Open-drain delayed output | Asserts after user-defined RC delay; resets automatically when input condition clears. |
| 0.6V REF | Internal comparator reference | Fixed 0.6-V output (pins 3/6 in 14-pin variants); not available on VSSOP-10; used internally for CMP1/CMP2 thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | CMP1 provides latched fault signaling with hardware reset; CMP2 offers programmable delay (0.5 s typical with 0.1 µF) for glitch immunity. |
| 100 V/V fixed gain | Eliminates external gain-setting resistors; reduces layout sensitivity and improves temperature stability vs. discrete solutions. |
| –16 V to +80 V common-mode range | Supports direct high-side sensing in 48-V/60-V systems without level-shifting or isolation components. |
| 1.2-V reference output | Provides stable, low-noise reference for external ADCs, DACs, or comparator thresholds - reducing BOM count. |
| Extended temperature operation | Specified from –40°C to +125°C ambient - validated for automotive under-hood, industrial motor drives, and telecom rectifiers. |
Applications
| Telecom Power Supply Monitoring | Battery Charger Overcurrent Protection |
|---|---|
Use Scenario: Real-time current monitoring in 48-V DC distribution systems with redundant rectifiers and hot-swap controllers. IC Role / Device Role / Timing Role: High-side shunt monitor providing analog feedback to PMBus controller and latched fault signal to system supervisor IC. Use Value: Enables compliance with GR-1089 immunity requirements via fast (<2 µs) overcurrent detection and latch hold-off during transient surges. |
Use Scenario: Constant-current phase monitoring in multi-cell Li-ion fast chargers with programmable charge termination. IC Role / Device Role / Timing Role: Primary current sensor feeding ADC and triggering CMP2 with 100-ms delay to ignore inrush peaks while catching sustained overcurrent. Use Value: Prevents false trips during 5-A inrush; maintains ±1% current regulation accuracy across 0–55°C ambient. |
| Industrial DC Motor Drive | Welding Equipment Current Control |
Use Scenario: Phase-leg current sensing in 24–72-V brushless DC motor inverters with regenerative braking. IC Role / Device Role / Timing Role: Unidirectional monitor on high-side shunt delivering analog output to PWM controller and CMP1 latch for stall/fault shutdown. Use Value: Supports 100-A peak current measurement with <100-µV offset drift, enabling torque ripple reduction below 0.5%. |
Use Scenario: Primary current feedback in IGBT-based arc welding inverters requiring precise 100–500-A output control. IC Role / Device Role / Timing Role: Shunt-based current transducer with 100× gain driving closed-loop current regulator and CMP2-delayed arc-failure alarm. Use Value: Delivers 200-kHz bandwidth for dynamic arc stabilization and ±3.5% total error over full thermal range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA204AIDGST | 50 V/V gain, same pinout/package, identical comparator architecture and reference outputs. | Lower gain suits higher shunt voltages (e.g., 200-mV full-scale), reducing need for external attenuation in medium-current designs. | Select when full-scale shunt voltage exceeds 50 mV and system noise floor permits reduced gain sensitivity. |
| INA271AIDRGT | 200 V/V gain, single comparator, no internal reference, SO-8 package, 1.1-MHz bandwidth. | Lacks dual-comparator fault redundancy and 1.2-V reference; optimized for ultra-fast response in high-frequency SMPS. | Choose for >500-kHz switching topologies where single-event overcurrent speed outweighs dual-threshold flexibility. |
Compared with INA204AIDGST, the INA205AIDGST provides double the gain for improved low-current resolution but trades bandwidth; versus INA271AIDRGT, it sacrifices speed for integrated fault logic and reference stability - making it optimal for robust, feature-rich power supervision rather than raw bandwidth.
Availability
INA205AIDGST is available at Aetrix Electronics and suitable for telecom power supplies, battery chargers, and industrial motor drives requiring stable component supply with guaranteed long-term availability and traceable lot-level documentation.
Supply support for INA205AIDGST 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 INA20x family was designed specifically for high-reliability current sensing in harsh electrical environments - targeting applications where wide common-mode range, integrated fault logic, and thermal stability are non-negotiable.
FAQ
What is the maximum common-mode voltage supported by the INA205AIDGST?
The INA205AIDGST supports a common-mode input voltage range of –16 V to +80 V. This allows direct high-side current sensing in 48-V telecom systems, industrial 60-V rails, and negative-voltage applications without external level-shifting circuitry. The specification is guaranteed across the full –40°C to +125°C operating temperature range and applies to both VIN+ and VIN− pins simultaneously.
Does the INA205AIDGST include an internal voltage reference, and is it accessible?
Yes, the INA205AIDGST integrates a 1.2-V reference output (pin 10 in VSSOP-10), specified as 1.188 V to 1.212 V at 25°C with ±100 ppm/°C drift over –40°C to +85°C. This reference is actively buffered and can source/sink up to 1 mA, making it suitable for biasing external comparators, ADC references, or precision voltage dividers in the same system.
How does the comparator delay function work on the INA205AIDGST?
The INA205AIDGST does not implement comparator delay in the VSSOP-10 package - this feature is exclusive to the 14-pin SOIC and TSSOP variants (e.g., INA205AIDR). The VSSOP-10 version (INA205AIDGST) retains CMP2 functionality but omits the CMP2 DELAY pin and associated internal RC timing circuitry. Designers requiring programmable delay must select the 14-pin variant.
What is the output type and drive capability of the comparators in the INA205AIDGST?
Both comparators in the INA205AIDGST feature open-drain NMOS outputs (CMP1 OUT and CMP2 OUT), compatible with 1.8–18-V pull-up voltages. Each output can sink up to 2.35 mA while maintaining VOL ≤300 mV. They are not push-pull and require external pull-up resistors - typically 4.7 kΩ to VS - to interface with standard logic families or microcontroller GPIOs.
Can the INA205AIDGST be used for bidirectional current sensing?
No, the INA205AIDGST is strictly a unidirectional current-shunt monitor. Its architecture measures only positive differential voltage (VIN+ > VIN−) and cannot resolve reverse current flow. For bidirectional applications, Texas Instruments recommends the INA226, INA240, or INA199 families - all of which provide true bipolar input range and signed output polarity.
INA205AIDGST 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:
- Obsolete
- 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
INA205AIDGST FAQ
1.How can I place an order for INA205AIDGST through Aetrix?
Please submit a Request for Quotation (RFQ) for INA205AIDGST 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 INA205AIDGST reliable?
The price and inventory of INA205AIDGST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA205AIDGST is usually 5 days.
3.What payment methods are accepted for INA205AIDGST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA205AIDGST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA205AIDGST?
INA205AIDGST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA205AIDGST 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 INA205AIDGST?
For technical support, including INA205AIDGST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA205AIDGST requirements.
6.How does Aetrix verify that INA205AIDGST is sourced from the original manufacturer or authorized distributors?
All INA205AIDGST 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 INA205AIDGST meets industry standards.
7.What is the process for return or replacement of INA205AIDGST?
All INA205AIDGST units undergo pre-shipment inspection (PSI). If there is an issue with INA205AIDGST, 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 INA205AIDGST part is unused and in its original packaging.
Return procedure for INA205AIDGST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA205AIDGST Tags
.jpg)
-
PSSI2021SAY,115
Nexperia USA Inc.
-
BCR401RE6327HTSA1
Infineon Technologies
-
INA199B2DCKR
Texas Instruments
-
INA199A1DCKR
Texas Instruments
-
INA199B1DCKR
Texas Instruments
-
NSI45015WT1G
onsemi
-
NSI45020T1G
onsemi
-
NSI45030AT1G
onsemi
-
NSI45025AT1G
onsemi
-
NSI45020AT1G
onsemi
-
NSI50010YT1G
onsemi
-
LM334Z/NOPB
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…
