A1230 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch FEATURES AND BENEFITS DESCRIPTION • • • • The A1230 is a dual-channel, bipolar switch with two Halleffect sensing elements, each providing a separate digital output for speed and direction signal processing capability. The Hall elements are photolithographically aligned to better than 1 µm. Maintaining accurate mechanical location between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. The A1230 is a highly sensitive, temperature-stable magnetic sensing device ideal for use in ring magnet based, speed and direction systems located in harsh automotive and industrial environments. • • • • • • AEC-Q100 automotive qualified Two matched Hall-effect switches on a single substrate 1 mm Hall element spacing Superior temperature stability and industry-leading jitter performance through use of advanced chopperstabilization topology Integrated regulator provides 3.3 V operation Integrated ESD protection from outputs and VCC to ground High-sensitivity switchpoints Robust structure for EMC protection Solid-state reliability Reverse-battery protection on supply and both output pins PACKAGES: 8-Pin SOIC (suffix L) 4-Pin SIP (suffix K) The A1230 monolithic integrated circuit (IC) contains two independent Hall-effect bipolar switches located 1 mm apart. The digital outputs are out of phase so that the outputs are in quadrature when interfaced with the proper ring magnet design. This allows easy processing of speed and direction signals. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro™ patented, high-frequency chopper stabilization technique cancels offsets in each channel providing stable operation over the full specified temperature and voltage ranges. Additionally, the high-frequency chopping circuits allow an increased analog signal-to-noise ratio at the input of the digital comparators internal to the IC. As a result, the A1230 Not to scale Continued on the next page… VOUTPUTB VOUTPUTA 2 OUTPUTA VSupply 1 100 Ω A A1230 VCC OUTPUTB GND 0.1 µF 4 A Resistor is optional depending on Conducted Immunity requirements Typical Application using Regulated Supply A1230DS, Rev. 6 3 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Description (continued) achieves industry-leading digital output jitter performance that is critical in high-performance motor commutation applications. An on-chip regulator allows the use of this device over a wide operating voltage range. Post-assembly factory programming at Allegro provides sensitive switchpoints that are symmetrical between the two switches. The A1230 is available in a plastic 8-pin SOIC surface-mount package (L) and a plastic 4-pin SIP (K). Both are available in a temperature range of –40°C to 150°C. Each package is lead (Pb) free, with 100% matte-tin-plated leadframe. Selection Guide Part Number Packing* Mounting A1230LK-T Bulk, 500 pieces/bag 4-pin SIP through hole A1230LLTR-T 13-in. reel, 3000 pieces/reel 8-pin SOIC surface mount Ambient, TA –40ºC to 150ºC *Contact Allegro for additional packing options. Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 SPECIFICATIONS Absolute Maximum Ratings Characteristic Symbol Supply Voltage Notes VCC Reverse Battery Voltage Output Off Voltage Output Sink Current Magnetic Flux Density Rating Units 26.5 V VRCC –16 V VOUTPUT VCC V IOUTPUT(Sink) Internally Limited – B Unlimited – Operating Ambient Temperature TA –40 to 150 ºC Maximum Junction Temperature TJ(max) 165 ºC Tstg –65 to 170 ºC Storage Temperature Range L Pin-Out Diagrams and Terminal List Table 1 2 3 4 Package K, 4-Pin SIP 1 8 2 7 3 6 4 5 Package L, 8-Pin SOIC Terminal List Table Pin Number Name Function Package K Package L 1 1 2 2 OUTPUTA Output from E1 via first Schmitt circuit 3 3 OUTPUTB Output from E2 via second Schmitt circuit 4 4 GND – 5-8 NC VCC Connects power supply to on-chip voltage regulator Terminal for ground connection No connection Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 3 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 OPERATING CHARACTERISTICS: valid over operating temperature ranges unless otherwise noted; typical data applies to VCC = 12 V, and TA = 25ºC Characteristic Symbol Test Conditions Min. Typ. Max. Unit1 ELECTRICAL CHARACTERISTICS Supply Voltage2 VCC Operating; TA ≤ 150°C 3.3 – 18 V Output Leakage Current IOUTPUT(OFF) Either output – <1 10 μA ICC(OFF) B < BRP(A) ,B < BRP(B) – 3.5 6.0 mA ICC(ON) B > BOP(A) ,B > BOP(B) – 3.5 6.0 mA Low Output Voltage VOUTPUT(ON) Both outputs; IOUTPUT(SINK) = 20 mA; B > BOP(A), B > BOP(B) – 160 500 mV Output Sink Current IOUTPUT(SINK) – – 20 mA Output Sink Current, Continuous3 IOUTPUT(SINK)C TJ < TJ(max) ,VOUTPUT = 12 V – – 70 mA Output Sink Current, Peak4 IOUTPUT(SINK)P t < 3 seconds – – 220 mA Chopping Frequency fC – 780 – kHz Output Rise Time tr CLOAD = 20 pF, RLOAD = 820 Ω – 1.8 – µs Output Fall Time tf CLOAD = 20 pF, RLOAD = 820 Ω – 1.2 – µs Power-On Time tON B > 40 G or B < –40 G – 15 – µs Power-Off Time tOFF B > 40 G or B < –40 G – 25 – µs Power-On State POS B=0G – Low – – Supply Current TRANSIENT PROTECTION CHARACTERISTICS Supply Zener Voltage VZ ICC = 9 mA, TA = 25°C 28 – – V Supply Zener Current5 IZ VS = 28 V – – 9.0 mA Reverse-Battery Current IRCC VRCC = –18 V, TJ < TJ(max) – 2 15 mA MAGNETIC CHARACTERISTICS6 Operate Point: B > BOP BOP(A), BOP(B) – 7 30 G Release Point: B < BRP BRP(A), BRP(B) –30 –7 – G Hysteresis: BOP(A) – BRP(A), BOP(B) – BRP(B) BHYS(A), BHYS(B) 5 14 35 G Symmetry: Channel A, Channel B, BOP(A) + BRP(A), BOP(B) + BRP(B) SYMA, SYMB –35 – 35 G Operate Symmetry: BOP(A) – BOP(B) SYMAB(OP) –25 – 25 G Release Symmetry: BRP(A) – BRP(B) SYMAB(RP) –25 – 25 G 11 G (gauss) = 0.1 mT (millitesla). 2When operating at maximum voltage, never exceed maximum junction temperature, T (max). Refer to power derating curve charts. J 3 Device will survive the current level specified, but operation within magnetic specification cannot be guaranteed. 4 Short circuit of the output to VCC is protected for the time duration specified. 5 Maximum specification limit is equivalent to I CC(max) + 3 mA. flux density, B, is indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity magnetic fields. This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the field is indicated by the absolute value of B, and the sign indicates the polarity of the field (for example, a –100 G field and a 100 G field have equivalent strength, but opposite polarity). 6 Magnetic Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 4 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 EMC Contact Allegro MicroSystems for EMC performance. VCC Programmable Trim Regulator 4 Bit Channel A Amp LowPass Filter OUTPUTA Low Noise Signal Recovery Hall Element E1 Dynamic Offset Cancellation 2 Bit Output Drive Channel B Amp LowPass Filter OUTPUTB Low Noise Signal Recovery Hall Element E2 Dynamic Offset Cancellation 2 Bit Output Drive GND Functional Block Diagram Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 5 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 THERMAL CHARACTERISTICS: may require derating at maximum conditions; see application information Characteristic Symbol Package Thermal Resistance Test Conditions* RθJA Value Units Package K, 1-layer PCB with copper limited to solder pads 177 ºC/W Package L-8 pin, 1-layer PCB with copper limited to solder pads 140 ºC/W Package L-8 pin, 4-layer PCB based on JEDEC standard 80 ºC/W *Additional thermal data available on the Allegro website. Maximum Allowable VCC (V) Power Derating Curve 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 VCC(max) Package L, 4-layer PCB (RqJA = 80 °C/W) Package L, 1-layer PCB (RqJA = 140 °C/W) Package K, 1-layer PCB (RqJA = 177 °C/W) VCC(min) 20 40 60 80 100 120 140 160 180 Temperature (°C) Power Dissipation, PD (mW) Power Dissipation versus Ambient Temperature 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 Package L, 4-layer PCB (RqJA = 80 °C/W) Package L, 1-layer PCB (RqJA = 140 °C/W) Package K, 1-layer PCB (RqJA = 177 °C/W) 20 40 60 80 100 120 140 160 180 Temperature (°C) Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 6 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Electrical Operating Characteristics ICC(OFF) ICC(OFF) 8.0 7.0 7.0 Current (mA) 6.0 TA (°C) 5.0 -40 4.0 25 3.0 150 2.0 Current (mA) 8.0 VCC (V) 5.0 3.3 4.0 12 3.0 18 2.0 1.0 1.0 0.0 0 5 10 15 0.0 20 -50 0 50 100 VCC (V) Temperature ( C) ICC(ON) ICC(ON) 8.0 8.0 7.0 7.0 TA (°C) 5.0 -40 4.0 25 3.0 150 2.0 150 200 6.0 Current (mA) 6.0 1.0 VCC (V) 5.0 3.3 4.0 12 3.0 18 2.0 1.0 0.0 0.0 0 5 10 15 20 -50 0 VCC (V) 50 100 150 200 Temperature ( C) VOUTPUT(ON) 500 Voltage (mV) Current (mA) 6.0 450 VCC (V) 400 Ch. A 350 3.3 300 12 250 18 Ch. B 200 150 3.3 100 12 50 18 0 -50 0 50 100 150 200 Temperature ( C) Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 7 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Magnetic Operating Characteristics Channel A, BOP and BRP Channel A, BOP and BRP 30.0 10.0 25 150 BRP - 40 0.0 -10.0 25 150 -20.0 Switchpoint (G) BOP - 40 20.0 Switchpoint (G) 30.0 TA (°C) -30.0 20.0 VCC (V) 10.0 3.3 BOP 18 0.0 BRP -10.0 18 -20.0 -30.0 0 5 10 15 20 -50 0 VCC (V) Channel B, BOP and BRP 100 150 200 Channel B, BOP and BRP 30.0 TA (°C) BOP - 40 10.0 25 -10.0 150 BRP - 40 -20.0 150 0.0 25 -30.0 0 5 10 15 VCC (V) 20.0 Switchpoint (G) 20.0 Switchpoint (G) 50 Temperature (°C) 30.0 BOP 10.0 BRP -10.0 18 -30.0 20 -50 0 100 150 200 Channels A and B, BHYS(A) and BHYS(B) 30.0 - 40 25.0 25 150 20.0 Ch. B - 40 15.0 25 150 10.0 5.0 15 VCC (V) 20 35.0 BOP - BRP (G) TA (°C) Ch. A 10 50 Temperature (°C) 35.0 5 3.3 -20.0 Channels A and B, BHYS(A) and BHYS(B) 0 3.3 18 0.0 VCC (V) BOP - BRP (G) 3.3 30.0 VCC (V) Ch. A 25.0 3.3 18 20.0 Ch. B 3.3 15.0 18 10.0 5.0 -50 0 50 100 150 200 Temperature (°C) Additional magnetic characteristics on next page Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 8 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Continued from previous page. BOP Symmetry, SYMAB(OP) 25.0 20.0 20.0 15.0 15.0 10.0 TA (°C) 5.0 -40 0.0 25 -5.0 150 -10.0 -15.0 Ch. A - Ch. B (G) Ch. A - Ch. B (G) BOP Symmetry, SYMAB(OP) 25.0 10.0 5.0 VCC (V) 0.0 3.3 -5.0 18 -10.0 -15.0 -20.0 -20.0 -25.0 -25.0 0 5 10 15 -50 20 0 VCC (V) BRP Symmetry, SYMAB(RP) 100 150 200 BRP Symmetry, SYMAB(RP) 25.0 25.0 20.0 20.0 15.0 10.0 TA (°C) 5.0 -40 0.0 25 -5.0 150 -10.0 -15.0 -20.0 Ch. A - Ch. B (G) Ch. A - Ch. B (G) 50 Temperature (°C) 15.0 10.0 5.0 VCC (V) 0.0 3.3 -5.0 18 -10.0 -15.0 -20.0 -25.0 0 5 10 15 VCC (V) 20 -25.0 -50 0 50 100 150 200 Temperature (°C) Additional magnetic characteristics on next page Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 9 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Continued from previous page. Channel A Symmetry, SYMA 35.0 35.0 25.0 25.0 15.0 TA (°C) 5.0 -40 -5.0 25 150 -15.0 BOP + BRP (G) BOP + BRP (G) Channel A Symmetry, SYMA 15.0 VCC (V) 5.0 3.3 -5.0 18 -15.0 -25.0 -25.0 -35.0 -35.0 0 5 10 15 -50 20 0 VCC (V) 100 150 200 Temperature (°C) Channel B Symmetry, SYMB Channel B Symmetry, SYMB 35.0 35.0 25.0 25.0 15.0 TA (°C) 5.0 -40 -5.0 25 150 -15.0 -25.0 BOP + BRP (G) BOP + BRP (G) 50 15.0 VCC (V) 5.0 3.3 -5.0 18 -15.0 -25.0 -35.0 -35.0 0 5 10 VCC (V) 15 20 -50 0 50 100 150 200 Temperature (°C) 10 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 FUNCTIONAL DESCRIPTION Chopper-Stabilized Technique A limiting factor for switchpoint accuracy when using Hall effect technology is the small signal voltage developed across the Hall plate. This voltage is proportionally small relative to the offset that can be produced at the output of the Hall IC. This makes it difficult to process the signal and maintain an accurate, reliable output over the specified temperature and voltage range. Chopper-stabilization is a unique approach used to minimize Hall offset on the chip. The Allegro patented technique, dynamic quadrature offset cancellation, removes key sources of the output drift induced by temperature and package stress. This offset reduction technique is based on a signal modulation-demodulation process. The undesired offset signal is separated from the magnetically induced signal in the frequency domain through modulation. The subsequent demodulation acts as a modulation process for the offset causing the magnetically induced signal to recover its original spectrum at baseband while the DC offset becomes a high frequency signal. Then, using a low-pass filter the signal passes while the modulated DC offset is suppressed. Allegro’s new innovative chopper-stabilization technique uses a high frequency clock. This chopper-stabilization approach de- sensitizes the IC to temperature and stress. The high-frequency operation also allows a greater sampling rate that produces higher accuracy and faster signal processing capability. Additionally, filtering is more effective and results in a lower noise analog signal at the input to the Schmitt trigger. Therefore, this highfrequency chopping technique reduces jitter, also known as 360° repeatability, can be induced on the output signal. The sampleand-hold process, used by the demodulator to store and recover the signal, can slightly degrade the signal to noise ratio. This is because the process generates replicas of the noise spectrum at the baseband, causing a decrease in jitter performance. However, the improvement in switchpoint performance, resulting from the reduction of the effects of thermal and mechanical stress, outweighs the degradation in the signal to noise ratio. This technique produces devices that have an extremely stable quiescent Hall output voltage, are immune to thermal stress, and have precise recoverability after temperature cycling. This technique is made possible through the use of a BiCMOS process which allows the use of low offset and low noise amplifiers in combination with high-density logic integration and sample and hold circuits. Amp Sample and Hold Regulator LowPass Filter Figure 1: Chopper Stabilization Circuit (Dynamic Quadrature Offset Cancellation) 11 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 TYPICAL APPLICATIONS OPERATION Switch to High VOUTPUT(OFF) Switch to Low VOUTPUT V+ VOUTPUT(ON)(sat) BRP BOP B+ BHYS Figure 2: Output Voltage in Relation to Magnetic Flux Density Received. Output on each channel independently follows the same pattern of transition through BOP followed by transition through BRP. Channel A M agnetic Fie ld at Hall Element E1 Channel B M agnetic Fie ld at Hall Element E2 Channel A Output Signal at OUTPUTA Channel B Output Signal at OUTPUTB Figure 3:Quadrature Output Signal Configuration. The outputs of the two output channels have a phase difference of 90º when used with a properly designed magnet that has an optimal pole pitch of twice the Hall element spacing of 1 mm. 12 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 TYPICAL APPLICATIONS CIRCUITS This device requires minimal protection circuitry during operation with a low-voltage regulated line. The on-chip voltage regulator provides immunity to power supply variations between 3.3 and 18 V. Because the device has open-drain outputs, pull-up resistors must be included. If protection against coupled and injected noise is required, then a simple low-pass filter on the supply (RC) and a filtering capacitor on each of the outputs may also be needed, as shown in the unregulated supply diagram. For applications in which the device receives its power from unregulated sources, such as a car battery, full protection is generally required to protect the device against supply-side transients. Specifications for such transients vary for each application, so the design of the protection circuit should be optimized for each application. VOUTPUTB VOUTPUTB VOUTPUTA VOUTPUTA 2 2 OUTPUTA VSupply 1 100 Ω A 0.1 µF A1230 VCC OUTPUTB OUTPUTA 3 VSupply 1 A1230 VCC OUTPUTB 3 100 Ω GND GND 4 4 0.1 µF A Resistor is optional and is likely not needed for 12 V or 40 V clamped systems Figure 4: Regulated Supply Figure 5: Unregulated Supply 13 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 POWER DERATING The device must be operated below the maximum junction temperature of the device, TJ(max) . Under certain combinations of peak conditions, reliable operation may require derating supplied power or improving the heat dissipation properties of the application. This section presents a procedure for correlating factors affecting operating TJ. (Thermal data is also available on the Allegro MicroSystems Web site.) The Package Thermal Resistance, RθJA, is a figure of merit summarizing the ability of the application and the device to dissipate heat from the junction (die), through all paths to the ambient air. Its primary component is the Effective Thermal Conductivity, K, of the printed circuit board, including adjacent devices and traces. Radiation from the die through the device case, RθJC, is relatively small component of RθJA. Ambient air temperature, TA, and air motion are significant external factors, damped by overmolding. The effect of varying power levels (Power Dissipation, PD), can be estimated. The following formulas represent the fundamental relationships used to estimate TJ, at PD. PD = VIN × IIN (1) ΔT = PD × RθJA (2) TJ = TA + ΔT (3) For example, given common conditions such as: TA= 25°C, VCC = 12 V, ICC = 4 mA, and RθJA = 140 °C/W, then: PD = VCC × ICC = 12 V × 4 mA = 48 mW A worst-case estimate, PD(max) , represents the maximum allowable power level, without exceeding TJ(max) , at a selected RθJA and TA. Example: Reliability for VCC at TA = 150°C, package L, using a single-layer PCB. Observe the worst-case ratings for the device, specifically: RθJA = 140°C/W, TJ(max) = 165°C, VCC(max) = 18 V, and ICC(max) = 6 mA. Calculate the maximum allowable power level, PD(max) . First, invert equation 3: ΔTmax = TJ(max) – TA = 165 °C – 150 °C = 15 °C This provides the allowable increase to TJ resulting from internal power dissipation. Then, invert equation 2: PD(max) = ΔTmax ÷ RθJA = 15°C ÷ 140°C/W = 107 mW Finally, invert equation 1 with respect to voltage: VCC(est) = PD(max) ÷ ICC(max) = 107 mW ÷ 6 mA = 18 V The result indicates that, at TA, the application and device can dissipate adequate amounts of heat at voltages ≤VCC(est) . Compare VCC(est) to VCC(max) . If VCC(est) ≤ VCC(max) , then reliable operation between VCC(est) and VCC(max) requires enhanced RθJA. If VCC(est) ≥ VCC(max) , then operation between VCC(est) and VCC(max) is reliable under these conditions. ΔT = PD × RθJA = 48 mW × 140 °C/W = 7°C TJ = TA + ΔT = 25°C + 7°C = 32°C 14 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 PACKAGE OUTLINE DRAWING For Reference Only - Not for Tooling Use (Reference DWG-9010) Dimensions in millimeters - NOT TO SCALE Dimensions exclusive of mold flash, gate burs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown B 45° 5.21 +0.08 –0.05 E 1.00 1.55 ±0.05 E 2.10 D Mold Ejector Pin Indent 1.32 E 3.43 +0.08 –0.05 E1 45° Branded Face E2 1 2 3 4 2.16 MAX 0.84 REF 0.51 Ref A 0.41 +0.07 –0.05 NNNN YYWW +0.06 0.38 –0.03 1 1.27 NOM C Standard Branding Reference View N = Device part number Y = Last two digits of year of manufacture W = Week of manufacture 14.73 ±0.51 A Dambar removal protrusion (8X) B Gate and tie burr area C Branding scale and appearance at supplier discretion D Active Area Depth, 0.43 mm E Hall elements (E1 and E2), not to scale Figure 6: Package K, 4-Pin SIP 15 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 For Reference Only – Not for Tooling Use (Reference DWG-9204) Dimensions in millimeters – NOT TO SCALE Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown 4.90 ±0.10 8° 0° E 1.95 E 1.00 0.65 1.27 8 A 8 1.75 0.21 ±0.04 1.95 E 3.90 ±0.10 E1 5.60 6.00 ±0.20 0.84 E2 D +0.43 –0.44 1.04 REF 1 2 1 2 0.25 BSC B SEATING PLANE 8X +0.13 1.62 –0.27 B 0.10 0.41 ±0.10 1.27 BSC 0.15 SEATING PLANE A Active Area Depth, 0.40 mm REF Reference land pattern layout (reference IPC7351 SOIC127P600X175-8M); all pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances Branding scale and appearance at supplier discretion D Terminal #1 mark area E Hall elements (E1 and E2); not to scale PCB Layout Reference View GAUGE PLANE +0.10 –0.05 B C B NNNNNNN YYWW LLLL 1 C Standard Branding Reference View N Y W L = Device part number = Supplier emblem = Last two digits of year of manufacture = Week of manufacture = Lot number Figure 7: Package L, 8-Pin SOICN 16 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A1230 Revision History Revision Revision Date Description of Revision 2 May 6, 2013 Correct packing typographical error 3 June 9, 2014 Correct packing typographical error and reformatted datasheet 4 June 26, 2014 Correct chart labels, table row spacing, and typical application circuits text 5 June 24, 2015 Correct position of Hall elements in upper K package outline drawing 6 September 21, 2015 Added AEC-Q100 qualification under Features and Benefits Copyright ©2015, Allegro MicroSystems, LLC Allegro MicroSystems, LLC 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, LLC assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com 17 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com