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MAX1452 Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX1452 Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 25 page • 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 I/O and Commands. 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 mem- ory structure is arranged as shown in Table 1. The look- up 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 gen- eral 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 Low-Cost Precision Sensor Signal Conditioner 10 ______________________________________________________________________________________ MAX1452 VIN+ +12V TO +40V 2N2222A 47 Ω 100k Ω 4.99k Ω 4.99M Ω 30 Ω 100 Ω 499k Ω 100k Ω VIN- RSTC RISRC 1.0 μF 2.2 μF 0.1 μF 0.1 μF 0.1 μF INM TEST VSS INP 7 9 16 1 2 13 14 15 8 3 BDR VDDF VDD 5 6 4 FSOTC ISRC SENSOR MAX15006B OUT GND 1 D S G 5 Z1 IN 2N4392 8 OUT AMPOUT AMP- AMP+ Figure 4. Basic 4–20mA Output, Loop-Powered Configuration |
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Similar Description - MAX1452_09 |
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