MAX1452 Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

MAX1452

Low-Cost Precision Sensor Signal Conditioner

Maxim Integrated 

MAX1452

Low-Cost Precision Sensor

Signal Conditioner

SENSOR

5 BDR

6 INP

7

VDD VDDF 9

FSOTC 16

MAX1452

4 INM

ISRC 1

OUT 2

13

AMPOUT

AMP- 14

AMP+ 15

RSTC

RISRC 4.99MΩ

499kΩ

0.1µF

TEST VSS

83

100kΩ

2N4392

G

D 100Ω

S

IN 1

Z1

MAX15006B

8 OUT GND

30Ω

5

VIN+

+12V TO +40V

1.0µF

2.2µF

0.1µF

4.99kΩ

0.1µF

2N2222A

100kΩ

47Ω

VIN-

Figure 4. Basic 4–20mA Output, Loop-Powered Configuration

● Registers CONFIG, OTCDAC, and FSOTCDAC are

refreshed from EEPROM.

● Registers ODAC and FSODAC are refreshed from the

temperature indexed EEPROM locations.

Calibration Operation, Registers Updated by Serial

Communications

● The MAX1452 has not had the Secure-Lock byte set

(CL[7:0] = 00hex) or UNLOCK is high.

● Power is applied to the device.

● The power-on-reset functions have completed.

● The registers can then be loaded from the serial digital

interface by use of serial commands. See the section

on Serial Interface Command Format.

Internal EEPROM

The internal EEPROM is organized as a 768 by 8-bit

memory. It is divided into 12 pages, with 64 bytes per

page. Each page can be individually erased. The memory

structure is arranged as shown in Table 1. The lookup

tables for ODAC and FSODAC are also shown, with the

respective temp-index pointer. Note that the ODAC table

occupies a continuous segment, from address 000hex to

address 15Fhex, whereas the FSODAC table is divided

in two parts, from 200hex to 2FFhex, and from 1A0hex to

1FFhex. With the exception of the general-purpose user

bytes, all values are 16-bit wide words formed by two

adjacent byte locations (high byte and low byte).

The MAX1452 compensates for sensor offset, FSO, and

temperature errors by loading the internal calibration

registers with the compensation values. These compen-

sation values can be loaded to registers directly through

the serial digital interface during calibration or loaded

automatically from EEPROM at power-on. In this way the

device can be tested and configured during calibration

and test and the appropriate compensation values stored

www.maximintegrated.com

Maxim Integrated │  10

Share Link: