Datasheet
MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
23Maxim Integrated
Detailed Block Diagram
FLASH MEMORY
(LOOKUP PLUS CONFIGURATION DATA)
USAGE
FLASH
ADDRESS
0x000 + 0x001
16
1/3 V
BDR
1/3 V
DDX
1/3 V
BDR
1/3 V
DDX
16
16 + SIGN
0x15E + 0x15F
0x160 + 0x161
:
OFFSET DAC LOOKUP TABLE
(176 x 16 BITS)
0x16E + 0x16F
0x17E + 0x17F
:
RESERVED
0x180 + 0x181
0x1FE + 0x1FF
:
USER STORAGE
(128 BYTES)
USER STORAGE
(128 BYTES)
0x200 + 0x201
0x35E + 0x35F
:
FSO DAC LOOKUP TABLE
(176 x 16 BITS)
0x360 + 0x361
0x37E + 0x37F
: RESERVED
0x380 + 0x381
0x3FE + 0x3FF
:
0x400 + 0x401
0x7FE + 0x7FF
:
RESERVED
CONFIGURATION REGISTER 1
0x162 + 0x163
CONFIGURATION REGISTER 2
0x164 + 0x165
RESERVED
0x166 + 0x167
OFFSET TC REGISTER
0x168 + 0x169
RESERVED
0x16A + 0x16B
FSO TC REGISTER
0x16C + 0x16D
POWER-UP CONFIG REGISTER
16 + SIGN
FSO
DAC
FSO TC
DAC
CURRENT
MODE
OFFSET TC
DAC
OFFSET
DAC
C
C
CC
-1/2
6x, 12x, 18x,
OR 30x
CURRENT
MIRROR
V
DUALDAC
V
OTCDAC
V
ODAC
V
ISRC
CURRENT
MODE
CURRENT
MODE
VOLTAGE
MODE
50kI
V
DDX
V
DDX
GND
R
ISRC
10kI
1/3
3
1/3
OVERVOLTAGE,
UNDERVOLTAGE,
AND REVERSE-
VOLTAGE
PROTECTION
8
DIO
TEMP ADC
BANDGAP
TEMP
SENSOR
LDO
DIGITAL INTERFACE
OUT
OUT/DIO
MUX
OUT/DIO
V
DD
V
DDF
5V DIO
DRIVER
PHASE
REVERSAL
MUX
FAULT
DETECTION
BDR
IN-
IN+
GND
PROGRAMMABLE GAIN STAGE
PGA GAIN (V/V)PGA GAIN (V/V)PGA[4:0] PGA[4:0]
6 14400000 10000
7 17600001 10001
9 20800010 10010
11 25600011 10011
12 28800100 10100
14 35200101 10101
18 41600110 10110
22 51200111 10111
28 57601000 11000
36 70401001 11001
44 83201010 11010
52 102401011 11011
64 115201100 11100
80 140801101 11101
96 166401110 11110
112204801111 11111
INPUT-REFERRED OFFSET (COARSE OFFSET)
OFFSET (mV) OFFSET (mV)IRO SIGN, IRO[3:0] IRO SIGN, IRO[3:0]
55.5 01, 1111 0, 0000
51.8 -3.71, 1110 0, 0001
48.1 -7.41, 1101 0, 0010
44.4 -11.11, 1100 0, 0011
40.7 -14.81, 1011 0, 0100
37.0 -18.51, 1010 0, 0101
33.3 -22.21, 1001 0, 0110
29.6 -25.91, 1000 0, 0111
25.9 -29.61, 0111 0, 1000
22.2 -33.31, 0110 0, 1001
18.5 -37.01, 0101 0, 1010
14.8 -40.71, 0100 0, 1011
11.1 -44.41, 0011 0, 1100
7.4-48.11, 0010 0, 1101
3.7-51.81, 0001 0, 1110
0-55.51, 0000 0, 1111