Document
A1321/A1322/A1323
Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
The A132X family of linear Hall-effect sensors are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5mV/G, 3.125mV/G, and 5mV/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems. Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail lowimpedance output stage. A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise 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. The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH).
Package UA, 3-pin SIP
1. VCC 2. GND 3. VOUT
1 2 3
Package LH, 3-pin Surface Mount
1. VCC 2. VOUT 3. GND
3 1 2
Features and Benefits
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC .......................................... 8 V* Reverse-Battery Voltage, VRCC....................... –0.1 V Reverse-Output Voltage, VROUT ..................... –0.1 V Output Sink Current, IOUT ............................. 10 mA Operating Temperature Ambient, TA, Range E.................. –40ºC to 85ºC Ambient, TA, Range L................ –40ºC to 150ºC Maximum Junction, TJ(max)........................165ºC Storage Temperature, TS .................. –65ºC to 170ºC
*Additional
Temperature-stable quiescent output Improved sensitivity voltage 4.5 to 5.5 V operation Precise recoverability after temperature cycling Immunity to mechanical stress Output voltage proportional to magnetic flux Solid-state reliability density Robust EMC protection Ratiometric rail-to-rail output
Use the following complete part numbers when ordering:
Part Number
A1321EUA A1321ELH A1321LUA A1321LLH A1322EUA A1322ELH A1322LUA A1322LLH A1323EUA A1323ELH A1323LUA A1323LLH
Package
SIP Surface Mount SIP Surface Mount SIP Surface Mount SIP Surface Mount SIP .