ADuC7021:  Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU

The ADuC7019/ADuC7020/ADuC7021/ADuC7022/ADuC7024/ADuC7025/ADuC7026/ADuC7027/ADuC7028 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating high performance multichannel ADCs, 16-bit/32-bit MCUs, and Flash/EE memory on a single chip.

The ADC consists of up to 12 single-ended inputs. An additional four inputs are available but are multiplexed with the four DAC output pins. The four DAC outputs are only available on certain models (ADuC7020 and ADuC7026). However, in many cases where the DAC outputs are not present, these pins can still be used as additional ADC inputs, giving a maximum of 16 ADC input channels. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.

Depending on the part model, up to four buffered voltage output DACs are available on-chip. The DAC output range is programmable to one of three voltage ranges.

The devices operate from an on-chip oscillator and a PLL generating an internal high frequency clock of 41.78 MHz. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an ARM7TDMI, 16-bit/32-bit RISC machine, which offers up to 41 MIPS peak performance. Eight kilobytes of SRAM and 62 kilobytes of nonvolatile Flash/EE memory are provided on-chip. The ARM7TDMI core views all memory and registers as a single linear array.

ADuC7019/20/21/22/24/25/26/27/28均为完全集成的1 MSPS、12位数据采集系统,在单芯片内集成高性能多通道ADC、16位/32位MCU和Flash/EE存储器。

ADC具有多达12路单端输入。另外还可提供4路输入与4个DAC输出引脚复用。4路DAC输出只是在特定型号上提供(ADuC7020和ADuC7026)。然而,在无DAC输出的情况下,这些引脚仍然可以用作ADC的输入引脚,这样ADC的输入最多可以达到16通道。ADC可以在单端模式或差分输入模式下工作。ADC输入电压范围为0 V至VREF 。低漂移带隙基准电压源、温度传感器和电压比较器完善了ADC的外设设置。根据器件型号不同,片内最多可内置4个缓冲电压输出DAC。通过编程可以将DAC输出范围设置为三种电压范围之一。这些器件通过一个片内振荡器和锁相环(PLL)产生41.78MHz的内部高频时钟信号。该时钟信号通过一个可编程时钟分频器进行中继,在其中产生MCU内核时钟工作频率。微控制器内核为ARM7TDMI,它是一个16位/32位RISC机器,峰值性能最高可达41 MIPS。片内集成有8 KB SRAM和62 KB非易失性Flash/EE存储器。ARM7TDMI内核将所有存储器和寄存器视为一个线性阵列。

ADuC7021 特点
ADuC7021 技术指标
ADuC7021 应用领域
ADuC7021 功能框图

ADuC7021 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
ADuC7021BCPZ32 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021BCPZ32-RL7 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021BCPZ62 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021BCPZ62-RL 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021BCPZ62I 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021BCPZ62I-RL 量产 40 ld LFCSP (6x6mm w/4.1mm pad) 40 工业
ADuC7021 应用技术支持与电子电路设计开发资源下载
  1. ADuC7021 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf