Product Overview
The Allegro ACS722 is a highly accurate, Hall-effect-based current sensor IC designed for AC or DC current sensing in industrial, commercial, and communication systems. Its economical and precise nature, combined with a small, low-profile SOIC16 package, makes it ideal for space-constrained applications and cost savings. The device features patented digital temperature compensation for excellent accuracy over temperature, low power loss due to its 0.85 m typical primary conductor resistance, and high isolation, enabling high-side current sensing without complex external circuitry. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
Product Attributes
- Brand: Allegro
- Certifications: UL60950-1 (ed. 2) certified, TV America Certificate Number: U8V 16 03 54214 040, CB Certificate Number: US-32210-M1-UL, CB 16 03 54214 039
- Package Type: SOIC16 (MA)
- Leadframe Material: 100% matte tin plating
- Internal Construction: Pb-free (except for flip-chip high-temperature Pb-based solder balls)
Technical Specifications
| Characteristic | Symbol | Test Conditions | Value | Units |
|---|---|---|---|---|
| NOMINAL PERFORMANCE | ||||
| Current Sensing Range | IPR | ACS722KMATR-10AB | 10 | A |
| Current Sensing Range | IPR | ACS722KMATR-20AB | 20 | A |
| Current Sensing Range | IPR | ACS722KMATR-40AB | 40 | A |
| Sensitivity (Typ.) at VCC = 3.3 V | Sens | ACS722KMATR-10AB | 132 | mV/A |
| Sensitivity (Typ.) at VCC = 3.3 V | Sens | ACS722KMATR-20AB | 66 | mV/A |
| Sensitivity (Typ.) at VCC = 3.3 V | Sens | ACS722KMATR-40AB | 33 | mV/A |
| Zero Current Output Voltage | VIOUT(Q) | Bidirectional; IP = 0 A | VCC 0.5 | V |
| Primary Conductor Resistance | RIP | TA = 25C | 0.85 | m |
| Internal Bandwidth | BWi | Small signal 3 dB; CL = 1 nF, BW_SEL tied to GND | 80 | kHz |
| Internal Bandwidth | BWi | Small signal 3 dB; CL = 1nF, BW_SEL tied to VCC | 20 | kHz |
| Supply Voltage | VCC | 3 to 3.6 | V | |
| ACCURACY PERFORMANCE (ACS722KMATR-10AB) | ||||
| Total Output Error | ETOT | IP = IPR(max), TA = 25C to 125C | 1.7 | % |
| Sensitivity Error | ESENS | TA = 25C to 125C; measured at IP = IPR(max) | 1.5 | % |
| Offset Voltage | VOE | IP = 0 A; TA = 25C to 125C | 7 | mV |
| ACCURACY PERFORMANCE (ACS722KMATR-20AB) | ||||
| Total Output Error | ETOT | IP = IPR(max), TA = 25C to 125C | 1.2 | % |
| Sensitivity Error | ESENS | TA = 25C to 125C; measured at IP = IPR(max) | 0.75 | % |
| Offset Voltage | VOE | IP = 0 A; TA = 25C to 125C | 4.5 | mV |
| ACCURACY PERFORMANCE (ACS722KMATR-40AB) | ||||
| Total Output Error | ETOT | IP = IPR(max), TA = 25C to 125C | 1.2 | % |
| Sensitivity Error | ESENS | TA = 25C to 125C; measured at IP = IPR(max) | 1.2 | % |
| Offset Voltage | VOE | IP = 0 A; TA = 25C to 125C | 3 | mV |
| ISOLATION CHARACTERISTICS | ||||
| Dielectric Strength Test Voltage | VISO | Agency type-tested for 60 seconds per UL 60950-1 (edition. 2) | 4800 | VRMS |
| Working Voltage for Basic Isolation | VWVBI | According to UL 60950-1 (edition 2) | 1097 | VRMS or VDC |
| Working Voltage for Reinforced Isolation | VWVRI | According to UL 60950-1 (edition 2) | 565 | VRMS or VDC |
| Clearance | Dcl | Minimum distance through air from IP leads to signal leads | 7.5 | mm |
| Creepage | Dcr | Minimum distance along package body from IP leads to signal leads | 8.2 | mm |
| ABSOLUTE MAXIMUM RATINGS | ||||
| Supply Voltage | VCC | 6 | V | |
| Maximum Continuous Current | ICMAX | TA = 25C | 60 | A |
| Operating Ambient Temperature | TA Range | -40 to 125 | C | |
| Junction Temperature | TJ(max) | 165 | C | |
2404151029_ALLEGRO-ACS722KMATR-20AB-T_C459314.pdf
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