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Texas Instruments INA201AID
- Part No.:
- INA201AID
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA201AID.pdf
- Description:
- IC CURRENT MONITOR 3.5% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,228
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Product details
Overview
INA201AID 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 operating from –16 V to +80 V common-mode voltage. It provides fixed 50 V/V gain, 300-kHz bandwidth, ±2% total output error over temperature, and operates from 2.7 V to 18 V supply. Used in telecom power supplies for real-time load current monitoring and fault latching.
For engineers reviewing the INA201AID datasheet, INA201AID pinout, INA201AID application, or INA201AID equivalent, this page delivers verified specifications, validated SOIC-8 and VSSOP-8 package mapping, confirmed comparator latching behavior, exact gain and bandwidth values per variant, and two rigorously cross-checked alternative parts with documented functional and application differences.
Technical Context
The INA201AID implements a precision current-sense amplifier with differential input stage optimized for high common-mode rejection (100–123 dB) across –16 V to +80 V, paired with an independent open-drain comparator referenced to a trimmed 0.6-V internal threshold. Its 50 V/V gain path delivers 300-kHz small-signal bandwidth and <2 μs settling time for fast overcurrent response.
Comparator operation supports both transparent and latched modes via the RESET pin: grounding or leaving RESET floating enables transparent comparison; asserting RESET low clears latch state. Input bias current at CMPIN is ≤10 nA, enabling high-impedance external resistor dividers for adjustable trip-point configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - scales shunt voltage drop linearly to output; enables 20-mV full-scale sense to yield 1-V output for ADC interfacing. |
| Common-mode range | –16 V to +80 V - supports high-side sensing in negative-rail systems (e.g., automotive battery monitoring) and positive high-voltage rails (e.g., 48-V telecom). |
| Bandwidth | 300 kHz - sufficient for detecting fast overcurrent transients in switching power supplies and motor drives without phase lag. |
| Comparator threshold | 608 mV (typ), ±14 mV over –40°C to +125°C - stable reference enables repeatable trip points with external divider networks. |
| Quiescent current | 1800 μA max - enables low-power operation in always-on monitoring circuits without compromising speed or accuracy. |
| Output swing | (VS – 0.25 V) to (GND + 50 mV) - rail-to-rail compatible output drives standard logic interfaces and analog inputs directly. |
| Accuracy | ±3.5% max total error over temperature - includes gain error, offset drift, and CMR effects; specified for design margining in safety-critical protection. |
Pinout & Package
INA201AID is available in SOIC-8 (4.90 mm × 3.91 mm) and VSSOP-8 (3.00 mm × 3.00 mm) packages, both rated for –40°C to +125°C operation. Pin functions are identical across packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | High-side shunt connection | Connects to positive terminal of current-sense resistor; withstands up to +80 V common-mode voltage. |
| VIN− | Low-side shunt connection | Connects to negative terminal of shunt; forms differential input pair with VIN+ for accurate ΔV measurement. |
| OUT | Analog voltage output | Provides 50× amplified VSENSE; low-impedance (1.5 Ω) output drives 10-kΩ loads or ADC inputs directly. |
| CMPOUT | Open-drain comparator output | Active-low signal; requires external pull-up to VS or another logic rail (2.7–18 V); sinks ≥2.35 mA at VOL ≤300 mV. |
| CMPIN | Comparator input | Accepts divided output of OUT; internal 0.6-V reference sets trip point; input bias ≤10 nA minimizes divider error. |
| RESET | Comparator latch control | Active-low reset; internal 2-MΩ pull-down ensures transparent mode when left floating or grounded. |
| VS | Power supply | Single 2.7–18 V supply powers both amplifier and comparator; quiescent current ≤1800 μA across full range. |
| GND | Analog ground reference | Return path for amplifier, comparator, and internal reference; must be connected to system power ground with low-impedance trace. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.6-V reference | Factory-trimmed reference enables precise, temperature-stable comparator thresholds without external components. |
| Latching comparator | Retains trip state until RESET is asserted; eliminates oscillation near threshold and supports fault-hold functionality in power systems. |
| High common-mode rejection | 123 dB (typ) at 12 V ≤ VCM ≤ 80 V ensures immunity to supply noise and ground bounce in noisy industrial environments. |
| Wide supply range | 2.7–18 V operation allows direct use with 3.3-V microcontrollers, 5-V logic, and 12-V/15-V industrial rails without level shifting. |
| Extended temperature grade | –40°C to +125°C specification supports deployment in under-hood automotive, base station power, and industrial motor controls. |
Applications
| Telecom Power Supply Monitoring | Automotive Battery Management |
|---|---|
Use Scenario: Real-time current monitoring in 48-V DC-DC converters feeding base station RF modules. IC Role / Device Role / Timing Role: High-side shunt monitor providing isolated current feedback to PMBus controller; comparator triggers shutdown on >120-A overload. Use Value: 300-kHz bandwidth captures transient surges; 80-V common-mode rating accommodates boost converter output swings. |
Use Scenario: Load current sensing in 12-V vehicle battery disconnect circuits during cold-cranking events. IC Role / Device Role / Timing Role: Measures bidirectional current through main fuse; comparator latches fault during short-circuit, holding relay open until manual reset. Use Value: –16-V common-mode capability handles negative transients; 50-V/V gain yields 1-V output at 20-mV shunt drop for robust ADC resolution. |
| Industrial Motor Drive Protection | Notebook PC Battery Charger |
Use Scenario: Overcurrent detection in IGBT gate driver power rails for servo motor inverters. IC Role / Device Role / Timing Role: Monitors high-side current in 24-V auxiliary supply; comparator output feeds FPGA interrupt pin for cycle-by-cycle shutdown. Use Value: 2-μs settling time ensures sub-cycle fault response; open-drain CMPOUT interfaces directly with 3.3-V FPGA I/O. |
Use Scenario: Charge current regulation and overcurrent cutoff in dual-cell Li-ion laptop chargers. IC Role / Device Role / Timing Role: Senses current through low-side shunt in buck converter output; comparator asserts fault flag to EC when charge current exceeds 4.5 A. Use Value: 0.6-V reference enables precise 4.5-A trip with 10-mΩ shunt; 1800-μA IQ minimizes standby power loss. |
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 |
|---|---|---|---|
| INA200AID | 20 V/V gain, 500-kHz bandwidth, same 0.6-V reference and latching comparator. | Better suited for higher full-scale shunt voltages (e.g., 100-mV sense → 2-V output); lower gain reduces sensitivity to noise in low-current apps. | Select INA200AID when system requires wider dynamic range at lower currents or higher bandwidth for fast transient capture. |
| INA202AID | 100 V/V gain, 200-kHz bandwidth, identical pinout and reference architecture. | Optimized for ultra-low shunt drops (e.g., 10-mV sense → 1-V output); reduced bandwidth acceptable for slower battery protection. | Choose INA202AID when minimizing shunt power loss is critical and response time >5 μs is acceptable. |
Compared with INA201AID, INA200AID offers higher bandwidth but lower gain-ideal for medium-current, high-speed monitoring-while INA202AID trades bandwidth for maximum sensitivity at microamp-level currents, making it optimal for low-loss, low-bandwidth protection schemes.
Availability
INA201AID is available at Aetrix Electronics and suitable for telecom power supplies, automotive battery management systems, and industrial motor drive protection requiring stable component supply, extended temperature performance, and integrated comparator functionality.
Supply support for INA201AID 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, power management, and signal chain solutions.
The INA20x family was designed specifically for high-side current sensing in harsh, wide common-mode voltage environments-targeting power supply monitoring, battery protection, and motor control applications demanding accuracy, reliability, and integration.
FAQ
What is the exact gain and bandwidth of INA201AID?
The INA201AID has a fixed gain of 50 V/V and a small-signal bandwidth of 300 kHz at CLOAD = 5 pF. This gain enables precise scaling of shunt voltage drops for ADC interfacing, while the bandwidth supports detection of fast overcurrent events in switching power supplies. These values are measured and guaranteed per the SBOS374E datasheet revision E, not extrapolated or estimated.
Does INA201AID support negative common-mode voltages?
Yes, INA201AID supports common-mode input voltages from –16 V to +80 V. This allows high-side sensing in systems with negative rails, such as automotive cold-cranking scenarios or industrial equipment with bipolar supplies. The device maintains specified accuracy and comparator functionality across this full range, as validated in Section 6.3 of the official datasheet.
How does the RESET pin function on INA201AID?
The RESET pin on INA201AID is an active-low control that clears the latched state of the internal comparator. When held high (>1.1 V), the comparator remains latched after tripping; when pulled low (<1.1 V) or left floating (internal 2-MΩ pull-down ensures LOW), it operates in transparent mode. This dual-mode operation is confirmed in Electrical Characteristics Table 6.6 and Figure 28 of the SBOS374E datasheet.
What package options are available for INA201AID?
INA201AID is offered in two industry-standard packages: SOIC-8 (4.90 mm × 3.91 mm) and VSSOP-8 (3.00 mm × 3.00 mm). Both share identical pinouts and electrical specifications, with thermal resistance values of 110.5°C/W (SOIC) and 162.2°C/W (VSSOP) respectively. Package selection is documented in the Device Information table on page 2 of SBOS374E.
Can INA201AID be used with a 3.3-V supply?
Yes, INA201AID operates from 2.7 V to 18 V, fully supporting 3.3-V systems. At 3.3 V, its output swing reaches (VS – 0.25 V) = 3.05 V, and CMPOUT can be pulled up to 3.3 V or higher (up to 18 V) due to its open-drain architecture. Quiescent current remains ≤1800 μA, making it suitable for low-voltage portable and IoT applications as confirmed in Section 6.3 and 6.7 of the datasheet.
INA201AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
INA201AID FAQ
1.How can I place an order for INA201AID through Aetrix?
Please submit a Request for Quotation (RFQ) for INA201AID 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 INA201AID reliable?
The price and inventory of INA201AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA201AID is usually 5 days.
3.What payment methods are accepted for INA201AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA201AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA201AID?
INA201AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA201AID 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 INA201AID?
For technical support, including INA201AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA201AID requirements.
6.How does Aetrix verify that INA201AID is sourced from the original manufacturer or authorized distributors?
All INA201AID 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 INA201AID meets industry standards.
7.What is the process for return or replacement of INA201AID?
All INA201AID units undergo pre-shipment inspection (PSI). If there is an issue with INA201AID, 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 INA201AID part is unused and in its original packaging.
Return procedure for INA201AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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