MAX14001 Datasheet, PDF (26/34 Pages) Maxim Integrated Products – Configurable, Isolated 10-bit ADCs for Multi-Range Binary Inputs

MAX14001/MAX14002
Configurable, Isolated 10-bit ADCs for
Multi-Range Binary Inputs
CFG (Read/Write)
Address = 0x09
Default = 0x183
Configuration register controls functions within the MAX14001/MAX14002.
BIT
FIELD NAME
DESCRIPTION
Selects Inrush comparator input multiplexer.
0
IRAW
0: Inrush comparator input is connected to filtered data in the FADC register
1: Inrush comparator input is connected to ‘raw’ data in the ADC register (default)
Selects FAST Inrush Mode. ADC is not used to trigger inrush. Inrush starts as soon as
sufficient voltage is present at high-voltage FET to provide the current. Inrush timer is reset
1
FAST
when there is not sufficient voltage to sustain the bias/inrush current.
Note: MAX14002 only works in FAST inrush mode.
0: ADC controlled (unused in MAX14002)
1: FAST inrush mode (default)
FT1 and FT0 control the number of readings that are averaged in the ADC filter.
FT[1:0] = 00 Filtering off (default)
3:2
FT[1:0]
FT[1:0] = 01 Average 2 readings
FT[1:0] = 10 Average 4 readings
FT[1:0] = 11 Average 8 readings
Connects the 70µA current source to the REFIN pin. This current powers an external shunt
4
EXTI
voltage reference.
0: Current source off (default)
1: Current source on and connected to the REFIN pin (external shunt reference)
Selects the voltage reference source for the ADC.
5
EXRF
0: Internal voltage reference enabled (default)
1: External voltage reference enabled
4-bit bias current, 50µA to 3.75mA in 0.25mA steps. This current flows through the high-
voltage FET when not in inrush mode.
IBIAS[3:0] = 0000 = 50µA
IBIAS[3:0] = 0001 = 0.25mA
9:6
IBIAS[3:0]
........
IBIAS[3:0] = 0110 = 1.5mA (Default)
…….
IBIAS[3:0] = 1110 = 3.5mA
IBIAS[3:0] = 1111 = 3.75mA
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