Datasheet > A1340LKTTN-4-T

A1340LKTTN-4-T

更新时间： 2024-11-15 01:19:23

品牌	Logo	应用领域
急速微 - ALLEGRO		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
42页	2003K
描述
High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization

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中文翻译

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A1340LKTTN-4-T 数据手册

A1340

High Precision Programmable Linear Hall Effect Sensor IC

with EEPROM, Analog Output, and Advanced Output Linearization

FEATURES AND BENEFITS

DESCRIPTION

•

Advanced 32-segment output linearization functionality

enables high output accuracy and linearity in the

presence of non-linear input magnetic fields

Customer adjustable sensitivity and offset, bandwidth,

output clamps, and 1^stand 2^ndorder temperature

compensation

The A1340 device is a high precision, programmable Hall

effect linear sensor integrated circuit (IC) for both automotive

andnon-automotiveapplications.ThesignalpathoftheA1340

provides flexibility through external programming that allows

the generation of an accurate, and customized output voltage

from an input magnetic signal. The A1340 provides 12 bits of

output resolution,andsupportsamaximumbandwidthof3kHz.

Simultaneous programming of all parameters for accurate

and efficient system optimization

The BiCMOS, monolithic integrated circuit incorporates a

Hall sensor element, precision temperature-compensating

circuitrytoreducetheintrinsicsensitivityandoffsetdriftofthe

Hall element, a small-signal high-gain amplifier, proprietary

dynamic offset cancellation circuits, and advanced output

linearization circuitry.

• Factory trimmed magnetic input range (coarse sensitivity)

and signal offset

• Sensitivity temperature coefficient and magnetic offset drift

preset at Allegro, for maximum device accuracy without

requiring customer temperature testing

• Temperature-stable, mechanical stress immune, and

extremely low noise device output via proprietary

four-phase chopper stabilization and differential circuit

design techniques

• Diagnostics for open circuit and undervoltage

• Wide ambient temperature range: –40°C to 150°C

• Operates with 4.5 to 5.5 V supply voltage

With on-board EEPROM and advanced signal processing

functions, theA1340 provides an unmatched level of customer

reprogrammable options for characteristics such as gain and

offset, bandwidth, and output clamps. Multiple input magnetic

range and signal offset choices can be preset at the factory. In

addition, the device supports separate hot and cold, 1^stand 2^nd

order temperature compensation.

Package: 4-pin SIP (suffix KT)

A key feature of the A1340 is its ability to produce a highly

linear device output for nonlinear input magnetic fields.

To achieve this, the device divides the output into 32 equal

segments and applies a unique linearization coefficient factor

to each segment. Linearization coefficients are stored in a

look-up table in EEPROM.

1 mm case thickness

The A1340 sensor is available in a lead (Pb) free 4-pin single

in-line package (KT suffix), with 100% matte tin leadframe

plating.

Not to scale

Analog Subsystem

Digital Signal Processing

Output Stage

...00110011...

Magnetic

12-bit

Output

Voltage

12-bit

Signal

Factory Preset

Magnetic Range

and

Bandwidth

and

Temperature

Compensation

Sensitivity

and

Fine Offset

Adjustment

Hall

Element

A to D

Conversion

D to A

Conversion

Output

Driver

Clamps

Linearization

Signal Offset

Figure 1: A1340 Signal Processing Path.

Functions with programmable parameters indicated by double-headed arrows.

A1340-DS, Rev. 2

12 3 4 5 6 7...42

中文翻译

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