Rainbow Electronics MAX1329 - Manual (Page 42)

MAX1329/MAX1330
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
42 ______________________________________________________________________________________
ADC Setup Register
The ADC Setup register configures the input multiplexer,
ADC gain, and unipolar/bipolar modes to perform a data
conversion. Changes made to the ADC Setup register
settings are applied immediately. If changes are made
during a conversion in progress, discard the results of
that conversion to ensure a valid conversion result.
MSEL: Multiplexer Select bit (default = 0). The MSEL bit
selects the upper or lower multiplexer. MSEL = 0 selects
the upper mux and MSEL = 1 selects the lower mux.
MUX<3:0>: Multiplexer Input Select bits (default =
0000). The MUX<3:0> bits plus the MSEL bit select the
inputs to the ADC (see Tables 7 and 8).
GAIN<1:0>: ADC Gain bits (default = 00). The
GAIN<1:0> bits select the gain of the ADC (see Table 9).
BIP: Unipolar-/Bipolar-Mode Selection bit (default = 0).
For unipolar mode, set BIP = 0. For bipolar mode, set
BIP = 1. For temperature-sensor conversions, use the
default GAIN = 00 and BIP = 0.
Table 7. Upper Multiplexer Bit Configuration (MSEL = 0)
POSITIVE INPUT NEGATIVE INPUT
MUX3 MUX2 MUX1 MUX0
MAX1329 MAX1330 MAX1329 MAX1330
0 0 0 0 AIN1 AGND
0 0 0 1 AIN2 AGND
0 0 1 0 OUTA AGND
0 0 1 1 FBA AGND
0 1 0 0 OUT1 AGND
0 1 0 1 IN1- AGND
0 1 1 0 OUTB OUT2 AGND
0 1 1 1 FBB IN2- AGND
1 0 0 0 AIN1 AIN2
1 0 0 1 AIN2 AIN1
1 0 1 0 OUTA FBA
1 0 1 1 FBA OUTA
1 1 0 0 OUT1 IN1-
1 1 0 1 IN1- OUT1
1 1 1 0 OUTB OUT2 FBB IN2-
1 1 1 1 FBB IN2- OUTB OUT2
MSB LSB
NAME MSEL MUX3 MUX2 MUX1 MUX0 GAIN1 GAIN0 BIP
DEFAULT 0 0 0 0 0 0 0 0