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This device is no longer in production. The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: October 31, 2011
• for the A1321EUA-T and the A1321LUA-T use the
• for the A1321ELHLT-T and the A1321LLHLT-T use the
• for the A1322LUA-T use the
• for the A1322LLHLT-T use the
• for the A1323EUA-T and the A1323LUA-T use the
• for the A1323LLHLT-T use the
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
Ratiometric Linear Hall Effect Sensor ICs
for High-Temperature Operation
Discontinued Product
A1325LUA-T
A1325LLHLX-T
A1326LLHLX-T
A1321, A1322, and A1323
A1324LUA-T
A1324LLHLX-T
A1326LUA-T
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Summary of Contents for Allegro MicroSystems A1321
- Page 1 However, Allegro MicroSystems, Inc. assumes no respon- sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. A1321, A1322, and A1323 Ratiometric Linear Hall Effect Sensor ICs...
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Page 2: Features And Benefits
Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA) Not to scale 0.1 F A1321-DS, Rev. 23 A1321, A1322, and A1323 Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Description The A132X family of linear Hall-effect sensor ICs are optimized, sensitive, and temperature-stable. - Page 3 A1321, A1322, A1323 Description (continued) recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process.
- Page 4 A1321, A1322, A1323 Package LH Terminal List Symbol Package LH VOUT Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Pin-out Drawings Number Package UA Connects power supply to chip Output from circuit Ground Package UA Description Allegro MicroSystems, Inc.
- Page 5 A1321, A1322, A1323 over operating temperature (T DEVICE CHARACTERISTICS Characteristic Electrical Characteristics; V = 5 V, unless otherwise noted Supply Voltage Supply Current Quiescent Voltage Output Voltage Output Source Current Limit Supply Zener Clamp Voltage Output Bandwidth Clock Frequency Output Characteristics; over V...
- Page 6 A1321, A1322, A1323 over operating temperature range, T MAGNETIC CHARACTERISTICS Characteristics Symbol Sensitivity Sens Delta V as a func- out(q) out(q)(ΔT) tion of temperature Ratiometry, V out(q) out(q)(ΔV) Ratiometry, Sens ΔSens (ΔV) Positive Linearity Lin+ Negative Linearity Lin– Symmetry UA Package...
- Page 7 A1321, A1322, A1323 Quiescent Voltage Output. In the quiescent state (no magnetic fi eld), the output equals one half of the supply voltage over the operating voltage range and the operating temperature range. Due to internal component tolerances and thermal con-...
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Page 8: Typical Characteristics
A1321, A1322, A1323 Average Positive Linearity (Lin+) vs Temperature = 5 V (°C) Average Ratiometry, V OUT(q)( V) 100.8 100.6 100.4 100.2 99.8 99.6 99.4 99.2 (°C) Continued on the next page... Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation... - Page 9 A1321, A1322, A1323 Average Absolute Quiescent Output Voltage, V = 5 V 2.575 2.55 2.525 2.475 2.45 2.425 (°C) Average Absolute Sensitivity, Sens, vs Temperature V cc = 5 V (°C) Average Delta Quiescent Output Voltage, V out(q)( T) , vs Temperature in readings at each temperature are relative to 25°C...
- Page 10 A1321, A1322, A1323 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional thermal information available on Allegro website. Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Symbol Test Conditions* Package LH, 1-layer PCB with copper limited to solder pads Package LH, 2-layer PCB with 0.463 in.
- Page 11 A1321, A1322, A1323 Power Derating The device must be operated below the maximum junction temperature of the device, T . Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving the heat dissipation properties of the application.
- Page 12 A1321, A1322, A1323 +0.12 2.98 –0.08 +0.10 2.90 –0.20 8X 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown Active Area Depth, 0.28 mm REF...
- Page 13 A1321, A1322, A1323 4.09 45° +0.08 3.02 –0.05 2.16 0.51 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2004-2010, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be required to per- mit improvements in the per for mance, reliability, or manufacturability of its products.
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