A3517LUA Allegro MicroSystems, A3517LUA Datasheet

A3517LUA

Manufacturer Part Number

A3517LUA

Description

RATIOMETRIC/ LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION

Manufacturer

Allegro MicroSystems

Datasheet

1.A3517LUA.pdf (12 pages)

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Supply Voltage, V

Output Voltage, V

Output Sink Current, I

Magnetic Flux Density, B ......... Unlimited

Package Power Dissipation,

Operating Temperature Range*, T

Storage Temperature Range,

* Infrequent excursions permitted; see

Applications Information.

Suffix S– .................... -20

Suffix L– .................... -40

............................. -65

.................................... See Graph

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

........................... 8.0 V

......................... 8.0 V

.................. 10 mA

Dwg. PH-006

C to +150

C to +170

C to +85

FOR HIGH-TEMPERATURE OPERATION

3517

3518

Hall-effect sensors with greatly improved offset characteristics. Ratiometric,

linear Hall-effect sensors provide a voltage output that is proportional to the

applied magnetic field and have a quiescent output voltage that is approxi-

mately 50% of the supply voltage. These magnetic sensors are ideal for use in

linear and rotary position sensing systems in the harsh environments of

automotive and industrial applications over extended temperatures to -40°C

and +150°C. The A3517xUA features an output sensitivity of 5 mV/G while

the A3518xUA has an output sensitivity of 2.5 mV/G. See the Magnetic

Characteristics table for complete, individual device parametrics.

temperature-compensating circuitry to reduce the intrinsic sensitivity drift of

the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-

impedance output stage.

frequency clock, reduces the residual offset voltage, which is normally caused

by device overmolding, temperature dependancies, and thermal stress. This

technique produces devices that have an extremely stable quiescent output

voltage, are immune to mechanical stress, and have precise recoverability after

temperature cycling. Many problems normally associated with low-level

analog signals are minimized by having the Hall element and amplifier in a

single chip. Output precision is obtained by internal gain and offset trim

adjustments during the manufacturing process.

package only.

The A3517xUA and A3518xUA are sensitive, temperature-stable linear

Each BiCMOS monolithic circuit integrates a Hall element, improved

A proprietary dynamic offset cancelation technique, with an internal high-

These reduced-cost devices are supplied in a 3-pin ultra-mini-SIP “UA”

AND

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A3517LUA Summary of contents

Page 1

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Dwg. PH-006 Supply Voltage, V ......................... 8 Output Voltage, V ........................... 8 Output Sink Current, I .................. Magnetic Flux Density, B ......... Unlimited Package ...

Page 2

... Vcc + – – + Vcc/2 R θJA = 206°C 100 120 AMBIENT TEMPERATURE in °C 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1997, 2000 Allegro MicroSystems, Inc. OUTPUT 3 2 GROUND Dwg. FH-016A 140 160 180 Dwg. GH-046-1 ...

Page 3

Characteristic Symbol Supply Voltage V CC Supply Current I CC Quiescent V OQ Voltage Output Output Voltage Output I OLM Source Current Limit Bandwidth (-3 dB) BW Clock Frequency f C Output Resistance r O Wide-Band ...

Page 4

... NOTE 3 – Except for ∆Sens , typical data (∆T) * See Characteristics Definitions for test conditions. † This calculation (formula 1, next page) yields the device’s equivalent accuracy, over the operating temperature range, in gauss. Part Numbers A3517SUA A3517LUA Min. Typ. Max. – +85 -40 – +150 5.0 6 ...

Page 5

Quiescent Voltage Output. In the quiescent state (no magnetic field), the output is ideally equal to one-half of the supply voltage over the operating voltage and tem- ≈ V perature range ( Due to internal component 2 OQ ...

Page 6

AND RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION 9.0 8.0 7.0 6.0 -50 - AMBIENT TEMPERATURE IN °C 2.55 2.54 2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 2.45 -50 - AMBIENT ...

Page 7

All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To become qualified, except for the destructive ESD tests, no failures are permitted. Qualification Test Test Method and Test Conditions Temperature Humidity JESD22-A101 Bias Life ...

Page 8

AND RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available. For safe, reliable operation, the output ...

Page 9

SENSOR DEPTH BELOW PACKAGE FACE 0 0 0.1 0.2 0.3 RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP -0.4 -0.2 0 RELATIVE DISTANCE www.allegromicro.com LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION + ...

Page 10

AND RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION 0.164 0.159 45° 0.122 0.117 0.031 0.085 MAX 0.640 0.600 0.0189 SEE NOTE 0.0142 0.050 BSC 0.062 0.058 45° 0.0173 0.0138 SEE NOTE Dwg. MH-014E in 115 ...

Page 11

... Allegro MicroSystems, Inc. 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 ...

Page 12

AND RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION Operating Temperature Ranges -20°C to +85° -40°C to +85° -40°C to +115° -40°C to +125° -40°C to +150°C Notes 1. ...

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