MAX15500_11 Datasheet, PDF (24/28 Pages) Maxim Integrated Products – Industrial Analog Current/ Voltage-Output Conditioners

Industrial Analog Current/
Voltage-Output Conditioners
Table 5. SPI Commands
COMMAND
ADDRESS
DIN[13:11]
000
001
010
011
100
101
110
111
NAME
DESCRIPTION
No-op
Write configuration
Reserved
Reserved
Read error
Read configuration
Reserved
Reserved
No operation.
Write device configuration register. See Table 6 for details.
Reserved, no operation.
Reserved, no operation.
Read error register status. See Table 7 for details.
Read device configuration register. See Table 6 for details.
Reserved, no operation.
Reserved, no operation.
Table 6. Configuration Register
LOCATION
DIN[9:7]
FUNCTION
Mode[2:0]
DESCRIPTION
Sets device operating mode.
000 Mode[0]: Standby
001 Mode[1]: Bipolar current: Q20mA
010 Mode[2]: Unipolar current: 0 to 20mA
011 Mode[3]: Unipolar current: 4mA to 20mA
100 Mode[4]: Standby
101 Mode[5]: Bipolar voltage: Q10V
110 Mode[6]: Unipolar voltage: 0 to 10V
111 Mode[7]: Unipolar voltage: 0 to 5V
DIN[6:4]
VBOTH[2:0]
Sets supply voltage brownout threshold for error reporting.
000: Q10V
100: Q18V
001: Q12V
101: Q20V
010: Q14V
110: Q22V
011: Q16V
111: Q24V
DIN[3]
Thermal
shutdown
0 = thermal protection off. 1 = thermal protection on.
DIN[10],
DIN[2:0]
—
Reserved
Note: Modes 2h and 3h are functionally identical.
Table 7. Readback Operations and Formatting
DOUT BITS
DESCRIPTION
COMMAND ADDRESS DIN[13:11] = 101. READBACK DEVICE CONFIGURATION REGISTER
DOUT[9:0] See configuration register details in Table 6.
COMMAND ADDRESS DIN[13:11] = 100. READBACK ERROR REGISTER
DOUT[9]
Output intermittent fault. For details, see the Error Handling section.
DOUT[8]
Output short circuit. This bit asserts when IOUT > 30mA in voltage and current modes for longer than 260ms.
DOUT[7]
Output open load. This bit asserts when VOUT is within 30mV of AVDDO or AVSSO and there is no short-circuit
condition for longer than 260ms.
DOUT[6]
Internal overtemperature. This bit asserts when the die temperature exceeds +150NC.
DOUT[5]
Supply brownout. This bit asserts when either supply has entered the brownout limits. See Table 6 for details.
DOUT[4:0] Reserved
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