MAX1452_09 Datasheet, PDF (23/25 Pages) Maxim Integrated Products – Low-Cost Precision Sensor Signal Conditioner

Low-Cost Precision Sensor
Signal Conditioner
Detailed Block Diagram
VDD
ISRC
VDD
FSO
DAC
VSS
RISRC
75kΩ
VSS
RSTC
75kΩ
FSOTC
BDR
INP
16-BIT
FSOTC
DAC
PHASE
VSS
REVERSAL
MUX
FSOTC REGISTER
MUX
Σ
✕ 26
16-BIT
±1
EEPROM
(LOOKUP PLUS CONFIGURATION DATA)
EEPROM ADDRESS
000H + 001H
:
VDD
OFFSET
DAC
16-BIT
15EH + 15FH
160H + 161H
162H + 163H
164H + 165H
166H + 167H
168H + 169H
16AH + 16BH
16CH + 16DH
:
VSS
19EH + 19FH
1A0H + 1A1H
:
VDD
2FEH + 2FFH
USAGE
OFFSET DAC LOOKUP TABLE
(176 ✕ 16-BITS)
CONFIGURATION REGISTER SHADOW
RESERVED
OFFSET TC REGISTER SHADOW
RESERVED
FSOTC REGISTER SHADOW
CONTROL LOCATION REGISTER
USER STORAGE (52 BYTES)
FSO DAC LOOKUP TABLE
(176 ✕ 16-BITS)
BANDGAP
TEMP
SENSOR
ΣΔ
8-BIT
LOOKUP
ADDRESS
DIGITAL
INTERFACE
VSS
PGA BANDWIDTH ≈
3kHz ± 10%
PGA
Σ
MUX
INM
VSS
INPUT REFERRED OFFSET
(COARSE OFFSET)
PROGRAMMABLE GAIN STAGE
IRO (3, 2:0) OFFSET mV
±1 _{PGA (3:0) PGA GAIN TOTAL GAIN}
1,111
63
0000
1.5
39
1,110
54
0001
2.0
52
1,101
45
1,100
36
1,011
27
1,010
18
16-BIT
OFFSET
TC DAC
0010
2.5
65
0011
3.0
78
0100
3.5
91
0101
4.0
104
1,001
1,000
9
OTC REGISTER
VSS
0
0110
4.5
117
0111
5.0
130
0,000
0
1000
5.5
143
0,001
0,010
0,011
0,100
0,101
-9
*INPUT REFERRED
-18
OFFSET VALUE IS
-27
PROPORTIONAL TO VDD.
VALUES GIVEN ARE FOR
-36
VDD = 5V.
-45
1001
6.0
156
1010
6.5
169
1011
7.0
182
1100
7.5
195
1101
8.0
208
0,110
-54
1110
8.5
221
0,111
-63
1111
9.0
234
PGA BANDWIDTH ≈ 3kHz ± 10%
UNCOMMITTED OP AMP
PARAMETER
I/P RANGE
I/P OFFSET
O/P RANGE
NO LOAD
1mA LOAD
UNITY GBW
VALUE
VSS TO VDD
±20mV
VSS, VDD ±0.01V
VSS, VDD ±0.25V
10MHz TYPICAL
VDD
VSS
TEST
CLK1M
VDDF
UNLOCK
DIO
OUT
AMP-
AMPOUT
AMP+
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