Precision Analog Microcontroller 12-bit
Analog I/O, ARM7TDMI® MCU
ADuC7019/20/21/22/24/25/26/27
On-chip peripherals
FEATURES
Analog I/O
Multichannel, 12-bit, 1 MSPS ADC
Up to 16 ADC channels1
Fully differential and single-ended modes
0 to VREF analog input range
12-bit voltage output DACs
Up to 4 DAC outputs available1
On-chip voltage reference
On-chip temperature sensor ( 3°C)
Voltage comparator
UART, 2 × I2C® and SPI® serial I/O
Up to 40-pin GPIO port1
4 × general-purpose timers
Wake-up and watchdog timers (WDT)
Power supply monitor
Three-phase, 16-bit PWM generator1
Programmable logic array (PLA)
External memory interface, up to 512 kB1
Power
Specified for 3 V operation
Active mode: 11 mA @ 5 MHz; 40 mA @ 41.78 MHz
Packages and temperature range
From 40-lead 6 mm × 6 mm LFCSP to 80-lead LQFP1
Fully specified for –40°C to +125°C operation
Tools
Microcontroller
ARM7TDMI core, 16-bit/32-bit RISC architecture
JTAG port supports code download and debug
Clocking options
Trimmed on-chip oscillator ( 3ꢀ)
External watch crystal
External clock source up to 44 MHz
41.78 MHz PLL with programmable divider
Memory
Low-cost QuickStart™ development system
Full third-party support
APPLICATIONS
Industrial control and automation systems
Smart sensors, precision instrumentation
Base station systems, optical networking
62 kB flash/EE memory, 8 kB SRAM
In-circuit download, JTAG-based debug
Software triggered in-circuit reprogrammability
FUNCTIONAL BLOCK DIAGRAM
ADC0
12-BIT
DAC
DAC0
DAC1
DAC2
DAC3
1MSPS
MUX
12-BIT ADC
12-BIT
DAC
ADC11
TEMP
SENSOR
ADuC7026
12-BIT
DAC
CMP0
CMP1
BANDGAP
REF
12-BIT
DAC
CMP
OUT
V
REF
PWM0
PWM0
PWM1
PWM1
PWM2
PWM2
H
L
H
L
H
L
THREE-
PHASE
PWM
OSC
XCLKI
ARM7TDMI-BASED MCU WITH
ADDITIONAL PERIPHERALS
AND PLL
XCLKO
2k × 32 SRAM
31k × 16 FLASH/EEPROM
PSM
PLA
GPIO
JTAG
4 GENERAL
PURPOSE TIMERS
SERIAL I/O
RST
POR
EXT. MEMORY
INTERFACE
2
UART, SPI, I C
Figure 1.
1 Depending on part model. See Ordering Guide for more information.
Rev. A
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