CT310 ALLEGRO

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
  • PDF pages: 15

Technical content

The CT310 is a 2D angle sensor in a dual full-bridge configuration from Allegro developed on its patented XtremeSense™ 2D tunnel magnetoresistance (TMR) technology. The operating magnetic field for this 2D sensor is 250 to 900 G and has an angle error less than 0.60° over temperature following a one-time offset, gain, and phase compensation. The sensitive axes of the TMR elements are orthogonal to each other, providing a 90° phase separation between the sine and cosine outputs when measured differentially. This phase separation is inherently independent of magnet pole spacing and air gap. The CT310 is available in an 8-lead TSSOP package, and for space-critical applications, a low-profile and small form factor 8-lead DFN package that is 2.00 mm × 2.00 mm × 0.45 mm in size. The packages are RoHS compliant and lead (Pb) free with a 100% matte-tin-plated leadframe. CT310-DS, Rev. 1 MCO-0001517

  • Angle error less than 0.60° (after one-time compensation) over full temperature range
  • Dual full-bridge resistor network
  • Operating magnetic field: 250 to 900 G
  • Differential outputs for SIN and COS axes
  • Supply voltage: 1.0 to 5.5 V
  • AEC-Q100 Grade 1 XtremeSense™ 2D TMR Angle Sensor Not to scale CT310 FEATURES AND BENEFITS DESCRIPTION April 24, 2024
  • Angular measurements
  • Rotary and angular sensors
  • BLDC motors

APPLICATIONS

Figure 1: CT310 Functional Block Diagram R R R R R R R R 8 4 6 2 COS2 COS1 SIN2 SIN1 VCOS VSIN GND GND PACKAGES 8-Lead DFN8-Lead TSSOP

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A. www.allegromicro.com SELECTION GUIDE Part Number [1] Operating Temp. Range (°C) Automotive Grade Output Type Package Packing CT310LS-IT8 –40 to 85 – Differential 8-lead TSSOP 6.40 mm × 3.05 mm × 1.10 mm Tape and Reel CT310LS-AT8 –40 to 125 Grade 1 Differential 8-lead TSSOP 6.40 mm × 3.05 mm × 1.10 mm Tape and Reel CT310LS-HD8 –40 to 125 – Differential 8-lead DFN 2.00 mm × 2.00 mm × 0.45 mm Tape and Reel [1] Contact Allegro Microsystems for different temperature rated TSSOP-8 or DFN-8 package offerings or direct wafer sales. Table of Contents

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ABSOLUTE MAXIMUM RATINGS [1] Characteristic Symbol Notes Rating Unit Forward Voltage VCOS, VSIN 6.0 V Reverse Voltage VRCOS, VRSIN –0.3 V Electrostatic Discharge Protection Level ESD Human Body Model (HBM) per JESD22-A114 ±4.0 (min) kV Charged Device Model (CDM) per JESD22-C101 ±1.0 (min) kV Maximum Magnetic Field BMAX ≤5 minutes at TA = 25°C ±2000 G Operating Ambient Temperature TA Industrial –40 to 85 °C Automotive (A), Extended Industral (H) –40 to 125 °C Storage Temperature TSTG –65 to 165 °C Lead Soldering Temperature TL 10 seconds 260 °C [1] Stresses exceeding the absolute maximum ratings may damage the CT310 and may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. THERMAL CHARACTERISTICS Characteristic Symbol Test Conditions Value Unit Junction-to-Ambient Thermal Resistance RθJA TSSOP-8 package 234 °C/W

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com PINOUT DIAGRAMS AND TERMINAL LISTS Terminal List Number Name Function 1 SIN1 [1] Differential output #1 for sine.

2 VSIN Supply voltage for sine

3 SIN2 [1] Differential output #2 for sine. 4 GND Ground for sine. 5 COS2 [2] Differential output #2 for cosine.

6 VCOS Supply voltage for cosine

7 COS1 [2] Differential output #1 for cosine. 8 GND Ground for cosine. [1] SIN2 – SIN1 = SIN. [2] COS2 – COS1 = COS. Figure 2: Nominal Differential Output, VDD = 3.0 V SIN1 VSIN SIN2 GND GND COS1 VCOS COS2 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 90 180 270 360 Differential Output [V] Angle [°] SIN COS N S N S N S N S N S Figure 3: TSSOP-8 – Top-Down View

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 4: DFN-8,Top-Down View Figure 5: DFN-8, Bottom-Up View Figure 6: CT310 Axes of Sensitivity for DFN-80° Terminal List Number Name Function 1 SIN1 [1] Differential output #1 for sine. 3 SIN2 [1] Differential output #2 for sine. 4 GND Ground for sine. 5 COS2 [2] Differential output #2 for cosine. 7 COS1 [2] Differential output #1 for cosine. 8 GND Ground for cosine. [1] SIN2 – SIN1 = SIN. [2] COS2 – COS1 = COS.

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ELECTRICAL CHARACTERISTICS: Valid over all operating voltage, temperature and field conditions, unless otherwise specified Characteristics Symbol Test Conditions Min. Typ. Max. Unit ELECTRICAL Supply Voltage Range VCOS, VSIN 1.0 – 5.5 V Bridge Resistance [3] RBRIDGE TA = 25°C 3.0 4.5 6.0 kΩ Temperature Coefficient Resistance MAGNETIC Operating Magnetic Field B 250 600 900 G DIFFERENTIAL OUTPUTS Angle Error [2] [3] θERR After one-time offset, amplitude, and orthogonality correction at 25°C, 0 hour – 0.30 0.60 ° Extended Range Angle Error [1] [2] θERR_EXT After one-time offset, amplitude, and orthogonality correction at 25°C, 0 hour, B = 200 G – – 0.90 ° Angle Error Over Lifetime [4] θERR_LIFE After one-time offset, amplitude, and orthogonality correction at 25°C, 0hr over lifetime – – 1.0 ° Angle Error Due to Hysteresis [1] [3] θERR_HYST – 0.03 – ° SIN, COS Differential Output Voltage Peak-to-Peak [3] VSIN_D, VCOS_D TA = 25°C 0.35 0.45 0.50 V/V Temperature Coefficient of Differential Output [1] [3] TCVOUT – –0.16 – %/°C SIN, COS Voltage Offset [3] VOFF_SIN, VOFF_COS – ±1 ±5 mV/V SIN, COS Amplitude Synchronism Ratio k 97 100 103 % Temperature Coefficient of Amplitude Synchronism [1] [3] TCk – ±0.005 – %/°C SIN, COS Orthogonality Error OESIN, OECOS Deviation from ideal phase separation between SIN and COS –2 0 2 ° Noise [1] [3] eN fBW = 1 Hz to 10 kHz, VDD = 3.0 V – 2.4 – µVRMS/V [1] Determined by design and characterization; not tested in production. [2] Hysteresis error and output noise are included in the Angular Error specification. [3] Typical values represent 3σ performance unless otherwise specified. [4] Angle Error over Lifetime assumes the maximum observed angle error drift due to AEC-Q100 Grade 1 stress, relative to zero hour performance..

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com

ELECTRICAL CHARACTERISTICS

VDD = 3.0 V and TA = 25°C (unless otherwise specified) Figure 9: Voltage Offset (mV/V) over Field and TempFigure 8: Output Voltage vs. Angle at B = 250 G Figure 10: Differential Output Voltage (V/V) over Field and Temp Figure 11: Amplitude Synchronism (V/V) over Field and Temperature Figure 12: Orthogonality Error over Field and Temp Figure 13: Angle Error After Compensation (25°C, 250 G) over Field and Temp Figures 8-12 show typical (mean, μ) performance over temperature and field to convey general performance trends for the identified specifications. -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 250 450 650 850 1050 Offset [mV/V] Field Stength [G] µ, -40°C µ, 25°C µ, 125°C -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 0 60 120 180 240 300 360 Output Voltage [V] Angle [°] SINE COSINE 0.30 0.35 0.40 0.45 0.50 0.55 0.60 250 450 650 850 1050 Output pk-pk [V/V] Field Stength [G] µ, -40°C µ, 25°C µ, 125°C 0.97 0.98 0.99 1.00 1.01 1.02 1.03 250 450 650 850 1050 Synchronism [V/V] Field Stength [G] µ, -40°C µ, 25°C µ, 125°C -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 250 450 650 850 1050 Orthogonality Error [°] Field Stength [G] µ, -40°C µ, 25°C µ, 125°C 0.0 0.2 0.4 0.6 0.8 1.0 250 450 650 850 1050 Error [°] Field Stength [G] µ, -40°C µ, 25°C µ, 125°C

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com RECOMMENDED APPLICATION CIRCUIT Figure 14: CT310 Application Diagram Table 1: Recommended External Components Component Description Parameter Min. Typ. Max. Unit CBYP 0.1 µF, X7R C – 0.1 – µF R R R R R R R R COS2 COS1 SIN2 SIN1 VCOS VSIN GND GND 0.1µF 1.0V to 5.5V

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Applications Information The XtremeSense TMR sensor location for the CT310 for the x, y dimensions are shown in Figure 15 and Figure 16 for the TSSOP-8 and DFN-8 packages respectively. Figure 17 and Figure 18 illustrates the location of the CT310 XtremeSense TMR sensor from the z dimension. All dimensions in the figures below are nominal. Figure 15: XtremeSense TMR Sensor Location in x-y Plane for CT310 in TSSOP-8 Package Figure 16: XtremeSense TMR Sensor Location in x-y Plane for CT310 in DFN-8 Package Figure 17: XtremeSense TMR Sensor Location in z Dimension for CT310 in TSSOP-8 Package Figure 18: XtremeSense TMR Sensor Location in z Dimension for CT310 in DFN-8 Package

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com PACKAGE OUTLINE DRAWINGS Figure 19: TSSOP-8 Package Drawing Table 2: CT310 TSSOP-8 Package Dimensions Symbol Dimensions in Millimeters (mm) Min. Typ. Max. A 1.05 1.10 1.20 A1 0.05 0.10 0.15 A2 – 1.00 1.05 b 0.25 – 0.30 C – 0.127 – D 2.90 3.05 3.10 E 6.20 6.40 6.60 E1 4.30 4.40 4.50 e – 0.65 – L 0.50 0.60 0.70 y – – 0.076 θ 0° 4° 8°

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 20: DFN-8 Package Drawing NOTES: 1. The terminal #1 identifier is a laser marked feature. Table 3: CT310 DFN-8 Package Dimensions Symbol Dimensions in Millimeters (mm) Min. Typ. Max. A 0.40 0.45 0.50 A1 0.00 0.02 0.05 b 0.15 0.20 0.25 c – 0.150 REF – D 1.925 2.000 2.075 D2 1.550 1.600 1.650 E 1.925 2.000 2.075 E2 0.700 0.750 0.800 e – 0.500 – L 4 0.325 0.375 0.425 L1 4 – 0.075 – L3 4 0.250 0.300 0.350 y 0.000 – 0.075

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com TAPE AND REEL POCKET DRAWINGS AND DIMENSIONS Figure 21: TSSOP-8 Tape and Pocket Drawings

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 22: DFN-8 Tape and Pocket Drawings

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com

PACKAGE INFORMATION

Table 4: CT310 Package Information Part Number Package Type # of Leads Package Quantity Lead Finish Eco Plan [1] MSL Rating [2] Operating Temperature [3] Device Marking [4] CT310LS-IT8 TSSOP 8 3000 Sn Green & RoHS 1 –40°C to 85°C CT310LS-IT8 YYWWSS CT310LS-AT8 TSSOP 8 3000 Sn Green & RoHS 1 –40°C to 125°C CT310LS-AT8 YYWWSS CT310LS-HD8 DFN 8 3000 Sn Green & RoHS 1 –40°C to 125°C 310H YWWS [1] RoHS is defined as semiconductor products that are compliant to the current EU RoHS requirements. It also will meet the requirement that RoHS substances do not exceed 0.1% by weight in homogeneous materials. Green is defined as the content of chlorine (Cl), bromine (Br), and antimony trioxide based flame retardants satisfy JS709B low halogen requirements of ≤ 1,000 ppm. [2] MSL Rating = Moisture Sensitivity Level Rating as defined by JEDEC standard classifications. [3] Package will withstand ambient temperature range of –40°C to 150°C and storage temperature range of –65°C to 165°C. [4] Device Marking for TSSOP is defined as CT310LS-XT8 YYWWSS where CT310LS = base part number, X = temperature code, T8 = TSSOP-8 package, YY = year, WW = work week, and SS = sequential number. DFN is defined as 300X where X = temperature code and Y = year, WW = work week, and S = sequential number.

XtremeSense™ 2D TMR Angle SensorCT310 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com For the latest version of this document, visit our website: www.allegromicro.com

Revision History

1 April 24, 2024 Document rebranded and minor editorial updates

Copyright 2024, Allegro MicroSystems. Allegro MicroSystems reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. Copies of this document are considered uncontrolled documents.