Rainbow-electronics MAX1329 Bedienungsanleitung PDF herunterladen (Seite 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

1010 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 00000000

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 77 78

MAX1329/MAX1330 1

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