Datasheet

dsPIC30F
DS70043F-page 24 © 2005 Microchip Technology Inc.
9.0 dsPIC30F PERIPHERALS
The Digital Signal Controller (DSC) family of 16-bit
MCU devices provides the integrated functionality of
many peripherals. Specific peripheral functions
include:
• Analog-to-Digital Converters:
- 10-bit high-speed A/D Converter
- 12-bit high-resolution A/D Converter
• General Purpose 16-bit timers
• Motor Control PWM module
• Quadrature Encoder module
• Input Capture module
• Output Compare/PWM module
• Data Converter Interface
• Serial Peripheral Interface (SPI
TM
) module
•UART module
•I
2
C
TM
module
• Controller Area Network (CAN) module
• I/O pins
9.1 Analog-to-Digital Converters
The Analog-to-Digital (A/D) Converters provide up to
16 analog inputs with both single-ended and differential
inputs. These modules offer on-board sample and hold
circuitry.
To minimize control loop errors due to finite update
times (conversion plus computations), a high-speed
low-latency ADC is required.
In addition, several hardware features have been
included in the peripheral interface to improve real-time
performance in a typical DSP-based application.
• Result alignment options
• Automated sampling
• Automated channel scanning
• Dual Port data buffer
• External conversion start control
There are two versions of A/D converters available for
the dsPIC30F family of devices:
• 10-bit high-speed A/D module
• 12-bit high-resolution A/D module
9.1.1 10-BIT HIGH-SPEED A/D MODULE
• 10-bit resolution
• Unipolar differential sample/hold amplifiers
• Up to 16 input channels
• Selectable reference inputs:
-External V
REF+ and VREF- pins available
• ±1 LSB max. Differential Non-Linearity (DNL)
(5V ±10%)
• ±1 LSB max. Integral Non-Linearity (INL)
(5V ±10%)
• Four on-chip sample and hold amplifiers:
- Enables simultaneous sampling of 2 or 4
analog inputs
• Automated channel scanning
• Single supply operation: 2.7-5.5V
• 1 Msps sampling rate at 5V
• Ability to convert during CPU Sleep and Idle
modes
• Conversion start can be manual or synchronized
with 1 of 4 trigger sources (Automatic, Timer3,
External Interrupt, PWM period match)
• 16-word deep memory-mapped result buffer:
- Lower and upper half of buffer can be filled
on alternate conversions
9.1.2 12-BIT HIGH RESOLUTION A/D
MODULE
• 12-bit resolution
• Unipolar differential sample/hold amplifiers
• Up to 16 input channels:
-External V
REF+ and VREF- pins available
• Selectable reference inputs
• ±1 LSB max. DNL (5V ±10%)
• ±1 LSB max. INL (5V ±10%)
• One on-chip sample and hold amplifier
• Automated channel scanning
• Single supply operation: 2.7-5.5V
• 200 ksps sampling rate at 5V
• Ability to convert during CPU Sleep and Idle
modes
• Conversion start can be manual or synchronized
with 1 of 3 trigger sources (Automatic, Timer3,
External Interrupt)
• 16-word deep memory-mapped result buffer:
- Lower and upper half of buffer can be filled
on alternate conversions