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CT417-HSN820DR

Allegro MicroSystems, LLC · Current Sensors · SOIC-8

CT417-HSN820DR from Allegro MicroSystems, LLC, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IP+ passive Input primary conductor (positive) carrying the measured current through the integrated current carrying conductor.
2 IP+ passive Input primary conductor (positive) carrying the measured current through the integrated current carrying conductor.
3 IP- passive Output primary conductor (negative) carrying the measured current out of the integrated current carrying conductor.
4 IP- passive Output primary conductor (negative) carrying the measured current out of the integrated current carrying conductor.
5 GND power_in Ground reference for the device.
6 FLT output Active low open drain fault output indicating OCD or UVLO; if not used, a 1.0 nF capacitor must be connected from the pin to ground, with a 100 kΩ pull-up to VCC when used.
7 OUT output Analog output voltage representing the measured current, with a maximum drive capability of ±1.0 mA and a capacitive load limit of 100 pF.
8 VCC power_in Supply voltage, recommended range 3.0 to 3.6 V with a 1.0 µF bypass capacitor.

Key specifications

Parameter Value
Manufacturer Allegro MicroSystems, LLC
Package SOIC-8
Category Magnetic Sensors
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage Strength VCC -0.3 6 V 3
Analog Input/Output Pins Maximum Voltage VI/O -0.3 V Maximum is VCC + 0.3 V, lower of VCC + 0.3 V or 6.0 V 3
Current Carrying Conductor Maximum Current ICCC(MAX) 70 A TA = 25°C 3
Dielectric Surge Strength Test Voltage VSURGE 6 kV IEC 61000-4-5: Tested ±5 Pulses at 2/60 seconds, 1.2 µs (rise) and 50 µs (width) 3
Surge Strength Test Current ISURGE 3 kA Tested ±5 Pulses at 3/60 seconds, 8.0 µs (rise) and 20 µs (width) 3
Electrostatic Discharge Protection Level HBM -2 2 kV Human Body Model (HBM) per JESD22-A114 3
Electrostatic Discharge Protection Level CDM -0.5 0.5 kV Charged Device Model (CDM) per JESD22-C101 3
Junction Temperature TJ -40 150 °C 3
Storage Temperature TSTG -65 155 °C 3
Lead Soldering Temperature TL 260 °C 10 seconds 3
Supply Voltage Range VCC 3 3.3 3.6 V 3
Output Voltage Range VOUT 0 V 0, VCC 3
Output Current IOUT -1 1 mA 3
Operating Ambient Temperature (Extended Industrial) TA -40 25 125 °C Extended Industrial 3
Operating Ambient Temperature (Automotive) TA -40 25 125 °C Automotive 3
Supply Current ICC 6 9 mA fBW = 1 MHz, no load, IP = 0 A 6
OUT Maximum Drive Capability IOUT -1 1 mA OUT covers 10% to 90% of VCC span 6
OUT Capacitive Load CL_OUT 100 pF 6
OUT Voltage Linear Range, Typical VOUT 0.65 2.65 V VSIG_AC = ±1.00 V, VSIG_DC = +2.00 V 6
FLT Voltage Low VFLT#_OL 0 0.5 V IFLT#_OUT ≤ 20 mA 6
Power-On Time tON 100 200 µs VCC ≥ 2.50 V 6
Current Range IRANGE 0 20 A 10
Voltage Output Quiescent VOQ 0.645 0.65 0.655 V TA = 25°C, IP = 0 A 10
Total Output Error ETOT -3 3 % FS IP sweep from IP(MIN) to IP(MAX) 10
Linearity Error ELIN -0.3 0.3 % FS IP = IP(MAX), TA = -40°C to 125°C 10
Sensitivity Error ESENS -0.4 0.4 % IP = IP(MAX), TA = 25°C 10
Sensitivity Error ESENS -3.3 3.3 % IP = IP(MAX), TA = 125°C 10
Sensitivity Error ESENS -2.7 2.7 % IP = IP(MAX), TA = -40°C 10
Offset Voltage Error VOE -6 6 mV IP = 0 A, TA = 25°C 10
Offset Voltage Error VOE -31 31 mV IP = 0 A, TA = 125°C 10
Offset Voltage Error VOE -22 22 mV IP = 0 A, TA = -40°C 10
Total Error Including Lifetime Drift ETOT(DRIFT) -3.2 3.2 % FS IP = IP(MAX), TA = -40°C to 125°C 10
Sensitivity Error Including Lifetime Drift ESENS(DRIFT) -3.8 3.8 % IP = IP(MAX), TA = -40°C to 125°C 10
Offset Voltage Error Including Lifetime Drift VOE(DRIFT) -35 35 mV IP = 0 A, TA = -40°C to 125°C 10
Sensitivity S 100 mV/A IRANGE(MIN) < IP < IRANGE(MAX) 10
Bandwidth fBW 1 MHz Small Signal = -3 dB 10
Noise eN 9.5 mARMS TA = 25°C, fBW = 100 kHz 10

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper CCC pins be connected to as much copper area as possible. It is 22

CAD (KiCad official)

  • Symbol: CT417-HSN820DR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ct417-hsn820dr-etched.step / ct417-hsn820dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ct417-hsn820dr.step / ct417-hsn820dr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Allegro MicroSystems, LLC datasheet (27 pp, sha256 b2fcdb1ea5c594ce, retrieved 2026-11-02, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF