Texas Instruments MSP430x4xx Family, User Manual

Page: 748 / 871

SD16 Introduction
27-2 SD16
27.1 SD16 Introduction
The SD16 module consists of up to three independent sigma-delta
analog-to-digital converters and an internal voltage reference. Each channel
has up to 8 fully differential multiplexed analog input pairs including a built-in
temperature sensor. The converters are based on second-order oversampling
sigma-delta modulators and digital decimation filters. The decimation filters
are comb type filters with selectable oversampling ratios of up to 256.
Additional filtering can be done in software.
Features of the SD16 include:
-
16-bit sigma-delta architecture
-
Up to 3 independent, simultaneously-sampling ADC channels
(The number of channels is device dependent, see the device-specific
data sheet.)
-
Up to 8 multiplexed differential analog inputs per channel
(The number of inputs is device dependent, refer to device−specific data
sheet.)
-
Software selectable on-chip reference voltage generation (1.2 V)
-
Software selectable internal or external reference
-
Built-in temperature sensor accessible by all channels
-
Up to 1.048576 MHz modulator input frequency
-
Selectable low-power conversion mode
The block diagram of the SD16 module is shown in Figure 27−1.