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ADUC7122:  Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU

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The ADuC7122 is a fully integrated, 1 MSPS, 12-bit data acquisition system, incorporating high performance multichannel ADCs, 12 voltage output DACs, 16-bit/32-bit MCUs, and Flash/EE memory on a single chip. The ADC consists of up to 13 inputs. Four of these inputs can be configured as differential pairs with a Programmable Gain Amplifier on their front end providing a gain between 1 and 5. 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 supply voltage monitor complete the ADC peripheral set.

The DAC output range is programmable to one of two voltage ranges. The DAC outputs have an enhanced feature of being able to retain their output voltage during a watchdog or software reset sequence.

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 that offers up to 41 MIPS peak performance. Eight kilobytes of SRAM and 126 kilobytes of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.

The ADuC7122 contains an advanced interrupt controller. The vectored interrupt controller (VIC) allows every interrupt to be assigned a priority level. It also supports nested interrupts to a maximum level of eight per IRQ and FIQ. When IRQ and FIQ interrupt sources are combined, a total of 16 nested interrupt levels are supported.

On-chip factory firmware supports in-circuit download via the I2C serial interface port, while nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low cost QuickStart™ Development System supporting this MicroConverter® family. The part contains a 16-bit PWM with six output signals.

For communication purposes, the part contains 2 × I2C channels that can be individually configured for master or slave mode. An SPI¯ interface supporting both master and slave modes is also provided.

The parts operate from 3.0 V to 3.6 V and are specified over atemperature range of −10°C to +95°C. The ADuC7122 is available in a 108-Ball BGA package.


Applications
  • Optical networking, industrial control, and automation systems
  • Smart sensors, precision instrumentation, base station systems

ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

Analog I/O

  • 13 external channel, 12-bit, 1 MSPS ADC
    2 channels with programmable gain
    PGA (1 to 5) input range
    IOVDD power monitor channel
    On-chip temperature monitor
    11 general-purpose inputs
  • Fully differential and single-ended modes
  • 0 V to VREF analog input range
  • 12 × 12-bit voltage output DACs
  • On-chip voltage reference: 1.2 V/2.5 V
    Buffered output reference sources for use with external circuits

Microcontroller

  • ARM7TDMI core, 16-bit/32-bit RISC architecture
  • JTAG port supports code download and debug

Clocking options

  • Trimmed on-chip oscillator (±3%)
  • External watch crystal
  • External clock source up to 41.78 MHz
  • 41.78 MHz PLL with programmable divider

Memory

  • 126 kB Flash/EE memory, 8 kB SRAM
  • In-circuit download, JTAG-based debug
  • Software-triggered in-circuit reprogrammability

On-chip peripherals

  • UART, 2 × I2C and SPI serial I/O
  • 32-pin GPIO port
  • 4× general-purpose timers
  • Wake-up and watchdog timers (WDT)
  • Power supply monitor

Vectored interrupt controller for FIQ and IRQ

  • 8 Priority levels for each interrupt type
  • Interrupt on edge or level external pin inputs

Power

  • Specified for 3 V operation
  • Active mode: 11 mA at 5 MHz, 40 mA at 41.78 MHz

Packages and temperature range

  • 7 mm × 7mm 108-ball BGA
  • Fully specified for −10°C to +95°C operation

Tools

  • Low cost QuickStart™ development system
  • Full third-party support

Functional Block Diagram for ADuC7122

Документация

Наименование Тип контента Тип файлов
ADuC7122: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU (Rev 0, 05/2010) (pdf, 1575 kB) Технические описания PDF
CN-0153: USB Based Temperature Monitor Using the ADuC7122 Precision Analog Microcontroller and an External Thermistor  (pdf, 198 kB) Circuit Note PDF
Using Integrated Precision Analog Microcontrollers to Simplify Data Acquisition System Design
The ins and outs (the I/O) of using Analog Microcontrollers to manage data acquisition applications
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Full-Featured Pedometer Design Realized with 3-Axis Digital Accelerometer  (pdf, 598 kB)
Analog Dialogue, June 2010
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For humans, an unobserved fall can have very serious consequences. Statistics show that the majority of serious consequences are not the direct result of falling, but rather are due to a delay in assistance and treatment. Post-fall consequences can be greatly reduced if relief personnel can be alerted in time.
(ECN, December 9, 2009)
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Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards (Part 1 of 2)
PLC evaluation board applications for industrial process-control systems are diverse, ranging from simple traffic control to complex electrical power grids, from environmental control systems to oil-refinery process control.
(Industrial Control DesignLine, 8/24/09)
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Integrated Route Taken to Pulse Oximetry
by Aude Richard and Brian Moss, Analog Devices, Inc. (EE Times, 12/6/2004)
Технические статьи HTML
Precision Analog Microcontroller Simplifies Optical Transceiver Design  (pdf)
by Eamon Neary and Nobuhiro Matsuzoe, Analog Devices, Inc. (Information Quarterly, Volume 3, Number 2, 2004)
Технические статьи PDF
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Средства разработки, программные модели, драйверы и ПО

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Приведенные цены действительны в США и указаны только для примерного бюджетного рассчета. Цены указаны в долларах США (за штуку в указанном размере партии) и могут быть изменены. Цены в других регионах могут отличаться в зависимости от местных пошлин, налогов, сборов и курсов валют. Для уточнения стоимости обращайтесь в местные офисы продаж Analog Devices, или к официальным дистрибьюторам. Цены на оценочные платы и наборы указаны за штуку независимо от количества.

ADuC7122 QuickStart Plus Development System
Модели Описание Цена Без использования свинца PCN/PDN Проверка наличия/
Покупка/Запрос образца
EVAL-ADUC7122QSPZ Статус: Prodn ADuC7122 Quickstart plus development system $ 159,00 Да -

Цены указаны за одну штуку, в долларах США, на условиях ФОБ. Являются рекомендованными розничными ценами в США, приведены только для примерного расчета и могут меняться. Международные цены могут отличаться на величину местных пошлин, налогов, сборов и курсов валют.

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