INA4180AIPWR-Q1 - Quad 26V Current Sense Amp, 20 V/V | TI
MPN: INA4180AIPWR-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.62 | $62.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.48 | $480.00 |
INA4180AIPWR-Q1 Overview
A current-sense amplifier is a specialized difference amplifier that measures the small voltage developed across a shunt resistor and converts it into a ground-referenced output signal. Within the power-management IC hierarchy, it sits between the shunt element and an ADC or controller, enabling precise current monitoring for system control and protection in automotive and industrial power rails.
Key features include the wide -0.2 V to 26 V common-mode range that survives load-dump and cold-crank conditions without external circuitry, four independent amplifiers in one package that reduce BOM cost and board area in multi-rail designs, rail-to-rail output for maximum ADC dynamic range, and offset voltage as low as . The extended -40C to +125C operating range and AEC-Q100 qualification make it suitable for under-hood and body electronics applications.
Architecturally, the INAx180 family integrates a precision matched resistor network that sets the gain (A1 = 20 V/V, A2 = 50 V/V, A3 = 100 V/V, A4 = 200 V/V), eliminating external gain-setting resistors and their matching errors. The zero-crossover-compatible input stage supports sensing on the low side or high side of the rail, and the output is referenced to ground regardless of common-mode voltage.
Typical applications include automotive battery current monitoring, 48V and 12V board-net supervision, electric power steering motor current feedback, DC-DC converter current loops, and industrial PLC analog input modules. Cost-optimized designs benefit from the quad-channel integration.
Design tip: choose the shunt resistor so the full-scale drop is 10-50 mV to balance accuracy against power dissipation, and use Kelvin (4-wire) connections to the shunt for best precision. Pricing shown as of 2026-08-29.
Drop-in alternatives for INA4180AIPWR-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with INA4180AIPWR-Q1 (same form factor and footprint) — differing in Output Type, Common-Mode Voltage Range, Package, Qualification, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
INA4180A2IPWR
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INA4180A3IPWR
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INA4180A4IPWR
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INA4180A1IPWR
✅ Drop-In📋 Reference alternative (not in catalog)
INA240A1QPWRQ1
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →INA4180AIPWR-Q1 Maximum Ratings & Electrical Characteristics
| Channels | 4 |
| Gain (A1 version) | 20 V/V |
| Common-Mode Voltage Range | -0.2 V to +26 V |
| Supply Voltage Range | 1.7 V to 5.5 V |
| Bandwidth | 350 kHz |
| Output Type | Voltage output, rail-to-rail |
| Operating Temperature | -40C to +125C |
| Package | 14-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 qualified |
| RoHS Status | Compliant |
| Input Type | Low-side / High-side current shunt monitor |
INA4180AIPWR-Q1 Pin Configuration
| Pin 1 | IN1+ — Channel 1 non-inverting input to shunt |
| Pin 2 | IN1- — Channel 1 inverting input to shunt |
| Pin 3 | GND — Ground reference |
| Pin 4 | IN2+ — Channel 2 non-inverting input to shunt |
| Pin 5 | IN2- — Channel 2 inverting input to shunt |
| Pin 6 | OUT1 — Channel 1 voltage output |
| Pin 7 | OUT2 — Channel 2 voltage output |
| Pin 8 | OUT3 — Channel 3 voltage output |
| Pin 9 | OUT4 — Channel 4 voltage output |
| Pin 10 | IN3+ — Channel 3 non-inverting input to shunt |
| Pin 11 | IN3- — Channel 3 inverting input to shunt |
| Pin 12 | VS — Power supply, 1.7 V to 5.5 V |
| Pin 13 | IN4+ — Channel 4 non-inverting input to shunt |
| Pin 14 | IN4- — Channel 4 inverting input to shunt |
Typical Applications
INA4180AIPWR-Q1 is suitable for 6 applications: Automotive Battery Current Monitoring, DC-DC Converter Current Feedback, Electric Power Steering and Motor Drives, Industrial PLC Analog Input Modules, Server and Telecom Power Rail Supervision, IoT and Smart Home Energy Monitoring.
Automotive Battery Current Monitoring
The INA4180AIPWR-Q1 monitors battery charge and discharge current in 12V automotive board-nets using its -0.2 V to +26 V common-mode range, which tolerates reverse and transient conditions without protection diodes. Placed across a 1-2 mOhm shunt in the battery negative or positive path, each of the four channels can supervise battery, alternator, and load currents simultaneously. The 350 kHz bandwidth captures inrush events, while AEC-Q100 qualification and -40C to +125C operation support under-hood placement.
Recommended
DC-DC Converter Current Feedback
In buck and boost converters, the INA4180AIPWR-Q1 provides analog current feedback for average-current-mode control loops. The 350 kHz bandwidth covers the switching-frequency ripple of converters running up to ~100 kHz, and the rail-to-rail output maximizes ADC resolution when read by controllers such as the TMS320F28004x C2000 family. The 20 V/V gain suits 10-50 mV shunt drops, keeping shunt dissipation below 250 mW at 5 A while delivering 0.2-1 V full-scale output.
Recommended
Electric Power Steering and Motor Drives
The INA4180AIPWR-Q1 supervises DC motor current in electric power steering, pumps, and actuators, where its 26 V common-mode rating covers 12V bus transients and its four channels can monitor motor, relay, and solenoid rails in one 14-TSSOP footprint. The analog voltage output feeds comparator or ADC-based overcurrent protection with microsecond response, complementing gate drivers such as the DRV8353SRTAR-Q1 that need an independent current-sense signal per motor phase leg.
Recommended
Industrial PLC Analog Input Modules
Industrial PLC and remote I/O modules use the INA4180AIPWR-Q1 to convert 4-20 mA loop or load currents into ground-referenced voltages for the system ADC. The -0.2 V to 26 V common-mode range tolerates wiring faults and ground potential differences typical in factory installations, while the quad-channel integration cuts cost and board area versus four single-channel monitors. The 350 kHz bandwidth also supports fast diagnost ics on switching loads such as solenoid banks and heater circuits.
Recommended
Server and Telecom Power Rail Supervision
In server and telecom backplanes, multiple 12V and intermediate bus rails must be continuously monitored for overcurrent and energy metering. The INA4180AIPWR-Q1 monitors four rails with one device; its 26 V common-mode ceiling covers 12V rails with margin, and the rail-to-rail output drives management ADCs or comparators directly. Cost-optimized designs benefit since one 14-TSSOP replaces four single-channel current-shunt monitors, reducing BOM count and placement cost.
Recommended
IoT and Smart Home Energy Monitoring
Smart plugs, EV chargers, and home energy gateways measure load current for consumption analytics and safety shutoff. The INA4180AIPWR-Q1 operates from a 1.7 V to 5.5 V supply, allowing direct interfacing with 3.3 V MCUs, and its rail-to-rail output uses the full ADC span of low-power processors such as the MSPM0L1305. The -0.2 V common-mode capability also handles accidental AC line reversals on the load side, improving robustness in consumer deployments.
Recommended
Recommended Products Summary
Engineering reference data for INA4180AIPWR-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA4180A2IPWR | INA240A1QPWRQ1 | AD8418WBRZ-RL |
|---|---|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | MSOP-8 - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Channels | 4 | 4 | 2 | 1 |
| Gain | 20 V/V | 50 V/V | 20 V/V | 20 V/V |
| Common-Mode Range | -0.2 V to +26 V | -0.2 V to +26 V | -4 V to +80 V | -2 V to +70 V |
| Bandwidth | 350 kHz | 350 kHz | 400 kHz | 2 MHz |
| AEC-Q100 | Qualified | Not qualified | Qualified | Automotive grade |
| PWM Rejection | Standard | Standard | Enhanced (83 dB) | High |
Key Differentiators
- Four channels in one 14-TSSOP (vs AD8418WBRZ-RL)
- Lowest common-mode headroom advantage on 12/24V rails (vs INA240A1QPWRQ1)
- Gain options across same footprint (vs INA4180A2IPWR)
Design Notes
Connect the IN+x and IN-x pins to the shunt resistor using Kelvin (4-wire) traces - route sense lines directly to the shunt pads, not to shared current-carrying copper. Even 10 mOhm of trace resistance adds 100 uV/A error that the 20 V/V gain converts to 2 mV/A output error. Place 0.1 uF decoupling at the VS pin within 2 mm, and add a small RC filter (e.g., 100 ohm / 1 nF) at the output when driving long traces or noisy ADC inputs, per TI INAx180 datasheet layout recommendations.
Do not exceed the +26 V common-mode limit - for automotive 12V systems with load dump, verify transient suppression upstream (TVS on the rail) because load dump can exceed 26 V. Also remember the input differential range is limited: large shunt drops beyond approximately VS/gain will saturate the output. Select the shunt so full-scale current produces 10-50 mV drop to balance signal-to-noise against power loss in the resistor.
In motor-drive or switching-converter environments, differential noise on the IN pins can rectify in the input stage. Use twisted or tightly coupled shunt sense routing, and add a differential RC filter (typically 10-100 ohm with 10-100 nF) at the inputs if PWM-induced ringing is present. For applications with severe PWM common-mode transients, consider INA240A1QPWRQ1 instead, whose enhanced PWM rejection architecture was designed for inverter phase-current sensing.
Compliance Information
AEC-Q100 qualified per TI INA4180-Q1 product page. RoHS status from distributor listings; REACH and halogen-free status not stated in retrieved data.
