MLX90277 Просмотр технического описания (PDF) - Melexis Microelectronic Systems

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MLX90277

Dual Programmable Linear Hall Effect Sensor

Melexis Microelectronic Systems  

MLX90277

Dual Programmable Linear Hall Effect Sensor

† Valid for Rough Gain within the specified option code.

†† ∆L = Life Time Drift (based on HTOL data [1000 hours @ 150°C]).

∆T = Thermal Drift.

(1) For other test conditions, please contact the Melexis Sales representative of your area.

10 Programmable Features

The MLX90277 has many programmable features for adjusting the output characteristics. The parameters

are independently programmable for IC A and IC B. The features are utilized by writing data into the

redundant non-volatile EEPROM. Below is a quick list and description of all the programmable parameters.

Many of the parameters are set by Melexis and they are not used by the end customer. Later sections of the

data sheet give details on how the parameters are used.

Parameter

Internal Bias Point

Symbol

AGND

Description

Coarse adjustment of VOQ.

Number of

Bits

10

Analog Clock Choice† CKANACH Adjustment for amplifier clock generator.

2

Clamping High

CLAMPHIGH Adjustment of upper output clamping

10

voltage.

Clamping Low

CLAMPLOW Adjustment of lower output clamping

10

voltage.

Customer ID††

CUSTID Open bits for customer programming.

24

Offset Drift†

DRIFT

VOQ temperature drift compensation.

4

EEPROM Fault Level FAULTLEV Output state for EEPROM parity error.

1

Fine Gain

FG

Fine adjustment for Sensitivity.

10

Filter

FILTER

Adjustment for low pass output filter.

4

Invert Slope

INVERT

Sensitivity polarity selection.

1

Memory Lock

MEM_LOCK Used to lock the entire EEPROM.

1

Melexis ID†

MLX_ID

Melexis IC identification number.

Melexis Lock†

MLX_LOCK Used to lock Melexis area of the EEPROM.

1

Output Driver†

MODE

Adjustment for output stage amplifier.

2

Offset DAC

OFFSET Fine adjustment of VOQ.

10

Oscillator Adjust†

OSCADJ Chip oscillator frequency adjustment.

4

EEPROM Parity

PARITY

Ensures the integrity of the EEPROM data.

3

Rough Gain

RG

Rough adjustment for Sensitivity.

4

Slow†

SLOW

Amplifier speed adjustment.

1

Temperature

TCW

Range adjustment for Sensitivity

3

Compensation Window

Temperature Compensation.

Temperature

TC

Fine adjustment of Sensitivity

5

Compensation

Temperature Compensation.

2nd Order Temperature TC2

Compensations

Linearization adjustment of the Sensitivity

6

Temperature Compensation.

Table 7: Programmable Parameters

†Melexis parameter adjusted at final test.

††Not included in redundant area of the EEPROM.

Default

IC_A

Trimmed

Preset

768

768

Preset

Trimmed

0

0

0

0

0

Preset

0

1

0

Preset

Calculated

0

Preset

0

0

0

Default

IC_B

Trimmed

Preset

256

256

Preset

Trimmed

0

0

0

0

0

Preset

0

1

0

Preset

Calculated

0

Preset

0

0

0

3901090277

Rev 004

Page 7 of 21

Data Sheet

Nov/06

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