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Specifications
working temperature:
-40℃~+150℃
Current Range:
±50A
Voltage - Supply:
3.3V
Current Terminal Resistance:
0.2mΩ
Band Width:
250kHz
Response Time (tr):
1.8us
Sensitivity:
26.4mV/A
Bidirectional Current Detection:
Support
Mfr. Part #:
ACS72981LLRATR-050B3
Package:
PSOF-7
Key Attributes
Model Number:
ACS72981LLRATR-050B3
Product Description
Product Overview
The Allegro ACS72981 family of current sensor ICs offers economical and precise solutions for AC or DC current sensing. With a 250 kHz bandwidth, these sensors are ideal for motor control, load detection and management, power supply and DC-to-DC converter control, and inverter control applications. Their <2 s response time enables overcurrent fault detection in safety-critical systems. The device utilizes a precision, low-offset linear Hall circuit with a low-resistance (200 typical) copper conduction path, minimizing power loss and enhancing power density. Proprietary digital temperature compensation ensures accuracy over temperature and lifetime, while differential sensing techniques eliminate output disturbance from common-mode magnetic fields.
Product Attributes
- Brand: Allegro
- AEC-Q100 automotive qualification
- Package: 7-pin PSOF (suffix LR)
- Lead (Pb) free
- All leads plated with 100% matte tin
- Leadframe made of oxygen-free copper
Technical Specifications
| Part Number | Primary Sampled Current (IP) | Sensitivity (Sens) (Typ.) | Nominal Supply Voltage (VCC) | Operating Temperature Range (TA) | Packing |
|---|---|---|---|---|---|
| ACS72981LLRATR-050B3 | 50 A | 26.4 mV/A | 3.3 V | 40 to 150 C | 3000 pieces per 13-inch reel |
| ACS72981LLRATR-050B5 | 50 A | 40 mV/A | 5 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-050U3 | 50 A | 52.8 mV/A | 3.3 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-050U5 | 50 A | 80 mV/A | 5 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-100B3 | 100 A | 13.2 mV/A | 3.3 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-100B5 | 100 A | 20 mV/A | 5 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-100U3 | 100 A | 26.4 mV/A | 3.3 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981LLRATR-100U5 | 100 A | 40 mV/A | 5 V | 40 to 150 C | Contact Allegro for additional packing options. |
| ACS72981KLRATR-150B3 | 150 A | 8.8 mV/A | 3.3 V | 40 to 125 C | Contact Allegro for additional packing options. |
| ACS72981KLRATR-150B5 | 150 A | 13.33 mV/A | 5 V | 40 to 125 C | Contact Allegro for additional packing options. |
| ACS72981KLRATR-150U3 | 150 A | 17.6 mV/A | 3.3 V | 40 to 125 C | Contact Allegro for additional packing options. |
| ACS72981KLRATR-150U5 | 150 A | 26.66 mV/A | 5 V | 40 to 125 C | Contact Allegro for additional packing options. |
| ACS72981ELRATR-200B3 | 200 A | 6.6 mV/A | 3.3 V | 40 to 85 C | Contact Allegro for additional packing options. |
| ACS72981ELRATR-200B5 | 200 A | 10 mV/A | 5 V | 40 to 85 C | Contact Allegro for additional packing options. |
| ACS72981ELRATR-200U3 | 200 A | 13.2 mV/A | 3.3 V | 40 to 85 C | Contact Allegro for additional packing options. |
| ACS72981ELRATR-200U5 | 200 A | 20 mV/A | 5 V | 40 to 85 C | Contact Allegro for additional packing options. |
| Key Features & Benefits | |||||
| High-bandwidth 250 kHz analog output | |||||
| Less than 2 s output response time | |||||
| 3.3 V and 5 V supply operation | |||||
| Ultralow power loss: 200 internal conductor resistance | |||||
| Industry-leading noise performance and increased bandwidth through proprietary amplifier and filter design techniques | |||||
| Greatly improved total output error through digitally programmed and compensated gain and offset over the full operating temperature range | |||||
| Small package size, with easy mounting capability | |||||
| Monolithic Hall IC for high reliability | |||||
| Output voltage proportional to AC or DC currents | |||||
| Factory-trimmed for accuracy | |||||
| Extremely stable zero amp output offset voltage over temperature and lifetime | |||||
| Typical Overcurrent Capabilities | |||||
| Characteristic | Rating | Unit | |||
| Overcurrent (IPOC) | 285 A | A | (TA = 25C, 1 second on time, 60 seconds off time) | ||
| Overcurrent (IPOC) | 225 A | A | (TA = 85C, 1 second on time, 35 seconds off time) | ||
| Overcurrent (IPOC) | 170 A | A | (TA = 125C, 1 second on time, 30 seconds off time) | ||
| Overcurrent (IPOC) | 95 A | A | (TA = 150C, 1 second on time, 10 seconds off time) | ||
| Absolute Maximum Ratings | |||||
| Characteristic | Symbol | Rating | Unit | Notes | |
| Forward Supply Voltage | VCC | 6.5 | V | ||
| Reverse Supply Voltage | VRCC | 0.5 | V | ||
| Output Voltage | VIOUT | 6.5 | V | ||
| Reverse Output Voltage | VRIOUT | 0.5 | V | ||
| Output Current | IOUT | 10 | mA | Maximum survivable sink or source current through the output | |
| Working Voltage | VWORKING | 100 | V | Voltage applied between pins 5-6 and all other pins | |
| Maximum Continuous Current | ICMAX | 120 | A | TA = 25C | |
| Nominal Operating Ambient Temperature | TA Range E | 40 to 85 | C | ||
| Nominal Operating Ambient Temperature | TA Range K | 40 to 125 | C | ||
| Nominal Operating Ambient Temperature | TA Range L | 40 to 150 | C | ||
| Maximum Junction Temperature | TJ(max) | 165 | C | ||
| Storage Temperature | Tstg | 65 to 165 | C | ||
| Common Operating Characteristics | |||||
| Characteristic | Test Conditions | Min. | Typ. | Max. | Unit |
| Supply Voltage | 5 V nominal supply voltage variant | 4.5 | 5 | 5.5 | V |
| Supply Voltage | 3.3 V nominal supply voltage variant | 3 | 3.3 | 3.6 | V |
| Supply Current | VCC(min) VCC VCC(max), no load on output | 14 | mA | ||
| Power-On Delay | TA = 25C | 70 | s | ||
| Undervoltage Lockout (UVLO) Threshold | VCC rising; UVLO is disabled, enabling the device output | 3.8 | 4.2 | V | |
| Undervoltage Lockout (UVLO) Threshold | VCC falling; UVLO is enabled, disabling the device output | 3.7 | V | ||
| UVLO Enable/Disable Delay Time | Time measured from falling VCC < VUVLOE to UVLO enabled | 74 | s | ||
| UVLO Enable/Disable Delay Time | Time measured from rising VCC > VUVLOD to UVLO disabled | 7 | s | ||
| Power-On Reset Voltage | VCC rising | 2.8 | V | ||
| Power-On Reset Voltage | VCC falling | 2.5 | V | ||
| Power-On Reset Hysteresis | VHys(POR) | 250 | mV | ||
| Internal Bandwidth | Small signal 3 dB, CL = 1 nF | 250 | kHz | ||
| Rise Time | TA = 25C, CL = 1 nF, 1 V step on output | 1.5 | s | ||
| Propagation Delay Time | TA = 25C, CL = 1 nF, 1 V step on output | 1 | s | ||
| Response Time | TA = 25C, CL = 1 nF, 1 V step on output | 1.8 | s | ||
| Output Slew Rate | TA = 25C, CL = 1 nF, 1 V step on output | 0.53 | V/s | ||
| DC Output Impedance | ROUT | < 1 | |||
| Output Load Resistance (Min) | RLOAD(MIN) VIOUT to GND | 4.7 | k | ||
| Output Load Capacitance (Max) | CLOAD(MAX) VIOUT to GND | 10 | nF | ||
| Primary Conductor Resistance | RPRIMARY TA = 25C | 200 | |||
| Output Voltage Clamp | VCLP(HIGH) TA = 25C, RL(PULLDWN) = 10 k to GND | 0.9 VCC | V | ||
| Output Voltage Clamp | VCLP(LOW) TA = 25C, RL(PULLUP) = 10 k to VCC | 0.1 VCC | V | ||
| Delay to Clamp | tCLP TA = 25C; CL = 1nF; Step on IP from 0.75 IPR to 1.5 IPR | 5 | s | ||
| Output Saturation Voltage | VSAT(HIGH) TA = 25C, RL(PULLDWN) = 10 k to GND | VCC 0.2 | V | ||
| Output Saturation Voltage | VSAT(LOW) TA = 25C, RL(PULLUP) = 10 k to VCC | 200 | mV | ||
| Error Components | |||||
| Characteristic | Test Conditions | Min. | Typ. | Max. | Unit |
| Quiescent Voltage Ratiometry Error | VCC = 5% variation of nominal supply voltage | 3.5 | mV | ||
| Sensitivity Ratiometry Error | VCC = 5% variation of nominal supply voltage | 0.6 | % | ||
| Clamp Ratiometry Error | VCC = 5% variation of nominal supply voltage | 1.0 | % | ||
| Noise | TA = 25C, CL = 1 nF | 0.4 | mARMS /(Hz) | ||
| Nonlinearity | Up to full-scale IP; IP applied for 5 ms | 0.8 | 0.45 | 0.8 | % |
| Symmetry | Over half-scale IP | 0.25 | % | ||
| Common Mode Field Offset Error Ratio | Measured at 100 G | 2 | mA/G | ||
2504101957_ALLEGRO-ACS72981LLRATR-050B3_C22392412.pdf
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