Datasheet

 2015 Microchip Technology Inc. Preliminary DS60001320B-page 429
PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
28.0 12-BIT HIGH-SPEED
SUCCESSIVE APPROXIMATION
REGISTER (SAR) ANALOG-TO-
DIGITAL CONVERTER (ADC)
The 12-bit High-Speed Successive Approximation
Register (SAR) Analog-to-Digital Converter (ADC)
includes the following features:
• 12-bit resolution
• Six ADC modules with dedicated Sample and
Hold (S&H) circuits
• Two dedicated ADC modules can be combined in
Turbo mode to provide double conversion rate
(clock sources for combined ADC modules must
be synchronous)
• Single-ended and/or differential inputs
• Can operate during Sleep mode
• Supports touch sense applications
• Six digital comparators
• Six digital filters supporting two modes:
- Oversampling mode
- Averaging mode
• Early interrupt generation resulting in faster
processing of converted data
• Designed for motor control, power conversion,
and general purpose applications
A simplified block diagram of the ADC module is
illustrated in Figure 28-1.
The 12-bit HS SAR ADC has up to five dedicated
ADC modules (ADC0-ADC4) and one shared ADC
module (ADC7). The dedicated ADC modules use a
single input (or its alternate) and are intended for
high-speed and precise sampling of time-sensitive or
transient inputs. The the shared ADC module
incorporates a multiplexer on the input to facilitate a
larger group of inputs, with slower sampling, and
provides flexible automated scanning option through
the input scan logic.
For each ADC module, the analog inputs are
connected to the S&H capacitor. The clock, sampling
time, and output data resolution for each ADC
module can be set independently. The ADC module
performs the conversion of the input analog signal
based on the configurations set in the registers.
When conversion is complete, the final result is
stored in the result buffer for the specific analog
input and is passed to the digital filter and digital
comparator if configured to use data from this
particular sample. Input to ADCx mapping is
illustrated in Figure 28-2.
Note: This data sheet summarizes the features
of the PIC32MZ EF family of devices. It is
not intended to be a comprehensive
reference source. To complement the
information in this data sheet, refer to
Section 22. “12-bit High-Speed
Successive Approximation Register
(SAR) Analog-to-Digital Converter
(ADC)” (DS60001344) in the “PIC32
Family Reference Manual”
, which is
available from the Microchip web site
(www.microchip.com/PIC32).