ACS725LLCTR-20AU-T
Magnetic Sensors
Technical Specifications
| Type | Description |
|---|---|
| Standby Current | - |
| Current Range | 20A |
| Current Terminal Resistance | 1.2mOhm |
| Band Width | 120kHz |
| Response Time (tr) | 4us |
| Sensitivity | 132mV/A |
| Type | Description |
|---|---|
| Bidirectional Current Detection | Not supported |
| Supply Voltage | 3V~3.6V |
| Operating Temperature | -40°C~+150°C |
| Features | Bidirectional detection |
| Package / Case | SOIC-8 |
Product Introduction
The Allegro™ ACS725 current sensor IC is an economical and precise solution for AC or DC current sensing in industrial, automotive, commercial, and communications systems. The small package is ideal for space-constrained applications while also saving costs due to reduced board area. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. The current is sensed differentially in order to reject common-mode fields, improving accuracy in magnetically noisy environments. The inherent device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is 1.2 mΩ typical, providing low power loss.
The ACS725 is provided in a small, low-profile surface-mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the flip-chip device is considered Pb-free. However, the solder bump connections are available in a Pb-free or high-temperature Pb-based option. Part numbers followed by -S are manufactured with tin-silver-based solder bumps, making these parts Pb-free compliant without the use of RoHS exemptions. Part numbers followed by -T are manufactured with Pb-based solder bumps using allowed RoHS exemptions.
Features
- AEC-Q100 qualified
- Differential Hall sensing rejects common-mode fields
- 1.2 mΩ primary conductor resistance for low power loss and high inrush current withstand capability
- Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients
- Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques
- High-bandwidth 120 kHz analog output for faster response times in control applications
- Filter pin allows user to filter the output for improved resolution at lower bandwidth
- Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open-loop sensor
- Small footprint, low-profile SOIC8 package suitable for space-constrained applications
- Filter pin simplifies bandwidth limiting for better resolution at lower frequencies
- 3.3 V, single supply operation
- Output voltage proportional to AC or DC current
- Factory-trimmed sensitivity and quiescent output voltage for improved accuracy
- Chopper stabilization results in extremely stable quiescent output voltage
- Nearly zero magnetic hysteresis
- Ratiometric output from supply voltage
Applications
- Industrial systems
- Automotive systems
- Commercial systems
- Communications systems
- Motor control
- Load detection and management
- Switched-mode power supplies
- Overcurrent fault protection
Datasheet
Alternative Parts
Common ACS725LLCTR-20AU-T alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 9030899090 |
| USHTS | 9030890100 |
| TARIC | 9030890000 |
| Type | Details |
|---|---|
| CAHTS | 9030890090 |
| BRHTS | 90308990 |
| INHTS | 90308990 |
| MXHTS | 9030.89.99 |
Sourcing Information
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