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  5. ADUC7122


Features and Benefits


  • 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


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


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


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


  • 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


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


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


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


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

Product Details

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.


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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Reference Designs (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADUC7122BBCZ Material Declaration Reliability Data 108-Ball CSPBGA (7mm x 7mm x 1.4mm)
ADUC7122BBCZ-RL Material Declaration Reliability Data 108-Ball CSPBGA (7mm x 7mm x 1.4mm)
Wafer Fabrication Data

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.