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參數(shù)資料
| 型號： | MAX1452 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Cost Precision Sensor Signal Conditioner |
| 中文描述： | 低成本、高精度傳感器信號調(diào)理器 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大小： | 283K |
| 代理商： | MAX1452 |
M
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 com-
pensation values can be loaded to registers directly via
Low-Cost Precision Sensor
Signal Conditioner
10
______________________________________________________________________________________
MAX1452
V
IN+
+12V TO +40V
2N2222A
47
100k
4.99k
4.99M
1k
100
499k
100k
V
IN-
RSTC
RISRC
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
INM
TEST V
SS
8
INP
7
9
16
1
2
13
14
15
3
BDR
V
DDF
FSOTC
V
DD
5
6
4
ISRC
SENSOR
MAX6105
5VOUTGND
1
D
S
G
3
Z1
IN
2N4392
2
OUT
AMPOUT
AMP-
AMP+
Figure 4. Basic 4–20mA Output, Loop-Powered Configuration
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