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Texas Instruments INA202AIDR
- Part No.:
- INA202AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA202AIDR.pdf
- Description:
- IC CURRENT MONITOR 3.5% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
INA202AIDR from Texas Instruments is a high-side current-shunt monitor IC with integrated open-drain comparator and 0.6-V internal reference, designed for overcurrent detection in power rails up to 80 V common-mode voltage. It provides 100 V/V gain, 200 kHz bandwidth, ±3.5% total output error over –40°C to +125°C, and operates from 2.7 V to 18 V supply. Used in telecom power supplies for real-time load current monitoring and fault flagging.
For engineers reviewing the INA202AIDR datasheet, INA202AIDR pinout, INA202AIDR application, or INA202AIDR equivalent, this page delivers verified functional identity, validated SOIC-8 package mapping, confirmed comparator latching behavior, exact gain/accuracy specs per TI SBOS374E, and two field-validated alternative parts with documented technical and application differences.
Technical Context
The INA202AIDR implements a precision current-sense amplifier with fixed 100 V/V gain and an independent open-drain comparator referenced to a trimmed 0.6-V internal threshold. Its input stage supports common-mode voltages from –16 V to +80 V, enabling direct high-side sensing in battery-powered and industrial DC systems without level-shifting circuitry.
The comparator features latching operation controlled by the RESET pin (active-low, internal 2 MΩ pull-down), and its trip point is set externally via resistor dividers on CMPIN. The device draws ≤1800 μA quiescent current and maintains 590–625 mV threshold accuracy across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - scales shunt voltage drop linearly to full-scale output at 100 mV input (e.g., 100 mV across shunt → 10 V out at VS = 12 V) |
| Common-mode range | –16 V to +80 V - enables direct sensing on positive- or negative-rail high-side configurations, including automotive battery and telecom -48 V systems |
| Total output error | ±3.5% max over –40°C to +125°C - includes gain error, offset drift, and PSR effects; defines worst-case current measurement uncertainty |
| Comparator threshold | 590–625 mV over temperature - precise internal 0.6-V reference sets trip point; external divider on CMPIN adjusts actual current threshold |
| Bandwidth | 200 kHz - supports fast transient overcurrent detection (e.g., short-circuit response within ~5 μs rise time) |
| Supply voltage | 2.7 V to 18 V - compatible with single-supply industrial logic and wide-input DC-DC converters |
| Quiescent current | ≤1800 μA - enables low-power always-on monitoring in battery-backed or energy-sensitive applications |
Pinout & Package
INA202AIDR is packaged in an 8-pin SOIC (D package), body size 4.90 mm × 3.91 mm, with standard surface-mount footprint and thermal resistance θJA = 110.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Analog input | Connects to high side of current-sense shunt; withstands up to +80 V common-mode voltage |
| VIN− | Analog input | Connects to low side of shunt; forms differential sense pair with VIN+; Kelvin connection recommended |
| OUT | Analog output | Voltage-output current sense signal (G × VSENSE); rail-to-rail swing capability (to GND + 4 mV / to VS − 0.25 V) |
| GND | Analog ground | Reference node for internal amplifier and comparator; must be tied to system analog ground plane |
| RESET | Digital input | Active-low comparator latch control; open or grounded for transparent mode; internal 2 MΩ pull-down ensures defined startup state |
| CMPOUT | Open-drain output | Comparator flag output; requires external pull-up (to 2.7–18 V); sinks ≥2.35 mA at VOL ≤300 mV |
| CMPIN | Analog input | Comparator non-inverting input; accepts divided shunt voltage to set precise overcurrent trip threshold |
| VS | Power supply | Single 2.7–18 V analog supply; powers both amplifier and comparator; bypass capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.6-V reference | Eliminates external reference IC or precision resistor network; enables stable trip-point setting across temperature (±15 mV variation) |
| Latching comparator | Retains fault state until explicit RESET assertion; prevents nuisance tripping during transient overloads in motor or hot-swap applications |
| High common-mode rejection | 123 dB CMR at 12–80 V common-mode - rejects noise from noisy power rails, critical for accurate sensing in switch-mode supplies |
| Wide supply range | 2.7–18 V operation - supports direct interface with 3.3 V, 5 V, or 12 V logic domains without level shifters |
| Extended temperature grade | –40°C to +125°C specified performance - qualified for under-hood automotive, industrial PLC, and telecom base station use |
Applications
| Telecom Power Supply Monitoring | Battery Management System (BMS) Cell Balancing |
|---|---|
|
Use Scenario: Real-time current monitoring in –48 V DC distribution systems to detect cable faults or module overloads. IC Role / Device Role / Timing Role: High-side current shunt monitor with comparator flag output; provides immediate hardware-level fault indication without MCU intervention. Use Value: Enables Class A protection compliance with <5 μs response to >120% overcurrent; eliminates need for separate comparator and reference ICs. |
Use Scenario: Detecting imbalance currents during active cell balancing in lithium-ion battery packs operating up to 60 V. IC Role / Device Role / Timing Role: Precision current sensor feeding balancing FET gate driver; comparator output triggers balancing enable signal. Use Value: 100 V/V gain resolves 10 mA imbalances across 10 mΩ shunts; ±3.5% error ensures consistent balancing thresholds across temperature. |
| Automotive Body Control Module (BCM) | Industrial Motor Drive Overcurrent Protection |
|
Use Scenario: Monitoring high-current loads (e.g., seat heaters, window lifters) powered from 12 V battery with reverse-battery tolerance. IC Role / Device Role / Timing Role: High-side current monitor with –16 V to +80 V common-mode range; handles cold-crank and load-dump transients. Use Value: Survives –16 V reverse-battery events; comparator latching holds fault flag during ignition restart sequences. |
Use Scenario: Protecting IGBT gate drivers from shoot-through or short-circuit conditions in 24–48 V servo drives. IC Role / Device Role / Timing Role: Fast-response current monitor feeding safety logic; OUT and CMPOUT provide analog feedback and digital fault flag. Use Value: 200 kHz bandwidth captures sub-millisecond overcurrent events; open-drain CMPOUT interfaces directly with FPGA or microcontroller interrupt inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219AIDR | 26 V max common-mode, I²C digital output, 0.1% gain accuracy, no integrated comparator | Requires MCU for threshold evaluation; unsuitable for standalone hardware fault shutdown | Select when digital bus interface and higher DC accuracy are prioritized over autonomous fault response |
| MAX40056ASA+ | 100 V/V gain, 2.5 V internal reference, push-pull comparator output, 1.5 MHz bandwidth | Higher supply voltage (up to 36 V), faster response, but lacks –16 V reverse-voltage tolerance | Select for high-speed industrial inverters where reverse-battery operation is not required |
Compared with INA202AIDR, INA219AIDR trades autonomous comparator functionality for digital precision and bus integration, while MAX40056ASA+ offers higher speed and push-pull output at the cost of reverse-voltage capability-making INA202AIDR uniquely suited for automotive and telecom systems requiring robust, self-contained overcurrent protection.
Availability
INA202AIDR is available at Aetrix Electronics and suitable for telecom power supplies, automotive body control modules, and industrial motor drives requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for INA202AIDR 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-side current sensing in harsh environments-targeting automotive, industrial, and telecom applications demanding wide common-mode range, integrated protection logic, and extended temperature operation.
FAQ
What is the maximum common-mode voltage supported by the INA202AIDR?
The INA202AIDR supports a common-mode input voltage range of –16 V to +80 V, verified per TI SBOS374E Absolute Maximum Ratings and Recommended Operating Conditions. This allows direct high-side sensing on 48 V telecom systems, 12 V automotive batteries (including cold-crank and load-dump), and negative-rail industrial supplies. Operation beyond these limits risks permanent damage.
Does the INA202AIDR require external components to operate as a complete current monitor?
Yes-the INA202AIDR requires an external current-sense shunt resistor, a 0.1 µF bypass capacitor on VS, and a pull-up resistor on CMPOUT (typically 4.7 kΩ to VS). To set overcurrent threshold, a resistor divider from OUT to GND is connected to CMPIN. No external reference or op-amp is needed due to its integrated 0.6-V reference and amplifier.
How does the RESET pin function on the INA202AIDR?
The RESET pin on the INA202AIDR is an active-low digital input controlling comparator latching behavior. When held low or left floating (due to internal 2 MΩ pull-down), the comparator operates in transparent mode. When driven high, it resets the latched fault state. TI specifies minimum pulse width of 1.5 µs and propagation delay of 3 µs, confirmed in Electrical Characteristics Table 6.6.
What is the gain accuracy of the INA202AIDR over temperature?
The INA202AIDR has a gain error of ±2% over –40°C to +125°C, and total output error of ±3.5% under same conditions (per SBOS374E Section 6.5). This includes contributions from gain error, offset voltage drift (±3.5 mV), and power-supply rejection (2.5–100 μV/V). Accuracy is specified at VSENSE ≥20 mV and VCM = 12 V.
Can the INA202AIDR be used in bidirectional current sensing applications?
Yes-the INA202AIDR supports bidirectional sensing when configured with appropriate external circuitry. Figure 30 in SBOS374E shows a dual-resistor divider network on CMPIN that sets independent trip thresholds for positive and negative current flow. The device's –16 V to +80 V common-mode range enables sensing across ground-referenced or floating shunts in H-bridge or battery charge/discharge paths.
INA202AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3.5%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA202AIDR FAQ
1.How can I place an order for INA202AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA202AIDR 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 INA202AIDR reliable?
The price and inventory of INA202AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA202AIDR is usually 5 days.
3.What payment methods are accepted for INA202AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA202AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA202AIDR?
INA202AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA202AIDR 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 INA202AIDR?
For technical support, including INA202AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA202AIDR requirements.
6.How does Aetrix verify that INA202AIDR is sourced from the original manufacturer or authorized distributors?
All INA202AIDR 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 INA202AIDR meets industry standards.
7.What is the process for return or replacement of INA202AIDR?
All INA202AIDR units undergo pre-shipment inspection (PSI). If there is an issue with INA202AIDR, 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 INA202AIDR part is unused and in its original packaging.
Return procedure for INA202AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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