Datasheet

MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
19Maxim Integrated
Table 18. ATIM Definition (ATIM[3:0])
Table 19. ALOC Definition (ALOC[4:0])
ALOC[4:0] NAME DESCRIPTION
BUFFERED OUTPUTS
00000 OUT PGA output
00001 BDR1 Bridge drive voltage
00010 V
ISRC
Bridge drive current-setting voltage (see the Detailed Block Diagram)
00011 V
DD
Internal regulated supply
00100 AGND Internal analog ground; approximately 1/2 of V
DD
00101 V
DUALDAC
Full-scale output plus full-scale output TC DAC (see the Detailed Block Diagram)
00110 V
ODAC
Offset DAC (see the Detailed Block Diagram)
00111 V
OTCDAC
Offset TC DAC (see the Detailed Block Diagram)
01000 V
REF
Bandgap voltage reference (nominally 1.25V)
01001 Reserved Reserved
01010 Reserved Reserved
01011 REFD3BUF Ratiometric reference; approximately 1/3 of V
DDX
01100 Reserved Reserved
01101 Reserved Reserved
01110 IN+ Sensor’s positive input
01111 IN- Sensor’s negative input
NONBUFFERED OUTPUTS
10000 BDR2 Bridge drive voltage
10001 V
DDI
Internal positive supply
10010 GND Internal ground
10011 to 11101 Reserved Reserved
SPECIAL-PURPOSE OUTPUTS
11110 CLIPLVL Output clip level during fault conditions (buffered output)
11111 Hi-Z High-impedance state on OUT/DIO
ATIM[3:0]
DURATION OF ANALOG SIGNAL SPECIFIED
IN BYTE TIMES (8-BIT TIME)
ATIM[3:0]
DURATION OF ANALOG SIGNAL
SPECIFIED IN BYTE TIMES (8-BIT TIME)
0000 2
0
+ 1 = 2 byte times (i.e., (2 x 8)/baud rate) 0111 2
7
+ 1 = 129 byte times
0001 2
1
+ 1 = 3 byte times 1000 2
8
+ 1 = 257 byte times
0010 2
2
+ 1 = 5 byte times 1001 2
9
+ 1 = 513 byte times
0011 2
3
+ 1 = 9 byte times 1010 2
10
+ 1 = 1025 byte times
0100 2
4
+ 1 = 17 byte times 1011 2
11
+ 1 = 2049 byte times
0101 2
5
+ 1 = 33 byte times 1100 2
12
+ 1 = 4097 byte times
0110 2
6
+ 1 = 65 byte times
1101 2
13
+ 1 = 8193 byte times
1110 or 1111 2
14
+ 1 = 16,385 byte times