霍尔传感器Allegro A1230

Terminal List Table
Pin Number Package K Package L 1 2 3 4 5-8 Name VCC Function Connects power supply to on-chip voltage regulator
1 2 3
1 2 3 4
8 7 6 5
1 2 3 4 –
OUTPUTA Output from E1 via first Schmitt circuit OUTPUTB Output from E2 via second Schmitt circuit GND NC Terminal for ground connection No connection
4
A1230 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch
Features and Benefits
▪ 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 LDO 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
*Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic Supply Voltage Reverse Battery Voltage Output Off Voltage Output Sink Current Magnetic Flux Density Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Symbol VCC VRCC VOUTPUT IOUTPUT(Sink) B TA TJ(max) Tstg Range L Notes Rating 26.5 –16 VCC Internally Limited Unlimited –40 to 150 165 –65 to 170 Units V V V – – ºC ºC ºC
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.
Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
3
A1230
Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch
Amp
LowPass Filter
Channel B 2 Bit Low Noise Signal Recovery Dynamic Offset Cancellation Hall Element E2 OUTPUTB Output Drive
Amp
LowPass Filter
来自百度文库
GND
Pin-Out Diagrams Package K Package L
Selection Guide
Part Number A1230LK-T A1230LLTR-T Packing* Bulk, 98 pieces/bag 13-in. reel, 3000 pieces/reel Mounting 4-pin SIP through hole 8-pin SOIC surface mount Ambient, TA –40ºC to 150ºC
Packages: 8-pin SOIC (suffix L), and 4-pin SIP (suffix K)
Not to scale
Continued on the next page…
Typical Application
VOUTPUTB VOUTPUTA 2
OUTPUTA
VSupply 100 7 A
1
A1230
VCC OUTPUTB
3
GND
0.1 μF A Resistor is optional,
4
depending on Conducted Immunity requirements
Using regulated supply
A1230DS
A1230
Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch
OPERATING CHARACTERISTICS Valid over operating temperature ranges unless otherwise noted; typical data applies to
VCC = 12 V, and TA = 25ºC Characteristic ELECTRICAL CHARACTERISTICS Supply Voltage2 Output Leakage Current Supply Current Low Output Voltage Output Sink Current Output Sink Current, Continuous3 Output Sink Current, Peak4 Chopping Frequency Output Rise Time Output Fall Time Power-On Time Power-Off Time Power-On State VCC IOUTPUT(OFF) ICC(OFF) ICC(ON) VOUTPUT(ON) IOUTPUT(SINK) IOUTPUT(SINK)C IOUTPUT(SINK)P fC tr tf tON tOFF POS CLOAD = 20 pF, RLOAD = 820 Ω CLOAD = 20 pF, RLOAD = 820 Ω B > 40 G or B < –40 G B > 40 G or B < –40 G B=0G TJ < TJ(max) ,VOUTPUT = 12 V t < 3 seconds Operating; TA ≤ 150°C Either output B < BRP(A) ,B < BRP(B) B > BOP(A) ,B > BOP(B) Both outputs; IOUTPUT(SINK) = 20 mA; B > BOP(A), B > BOP(B) 3.3 – – – – – – – – – – – – – – <1 3.5 4.5 160 – – – 780 1.8 1.2 15 25 Low 18 10 6.0 6.0 500 20 70 220 – – – – – – V μA mA mA mV mA mA mA kHz μs μs μs μs – Symbol Test Conditions Min. Typ. Max. Unit1
Description (continued) comparators internal to the IC. As a result, the A1230 achieves industry-leading digital output jitter performance that is critical in high performance motor commutation applications. An on-chip low dropout (LDO) 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
Functional Block Diagram
VCC
Programmable Trim
LDO Regulator
4 Bit
Channel A 2 Bit Low Noise Signal Recovery Dynamic Offset Cancellation Hall Element E1 OUTPUTA Output Drive
Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
2
A1230
Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch
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. 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