Features and Benefits
- Analog I/O
Multi-Channel, 12-bit, 1MSPS ADC
Up to 14 analog-to-digital converter (ADC) channels
Fully differential and single-ended modes
0 to VREF Analog Input Range
10-bit digital-to-analog converter (DAC)
32-bit 21 MHz direct digital synthesis (DDS)
Current-to-Voltage (I/V) Conversion
Integrated second-order low-pass filter (LPF)
DDS Input to DAC
100 Ω line driver
- On-Chip Voltage Reference
- On-Chip Temperature Sensor (±3°C)
- Voltage Comparator
ARM7TDMI Core, 16/32-bit RISC architecture
JTAG Port supports code download and debug
External Watch crystal/ Clock Source
41.78 MHz PLL with 8-way programmable divider
Optional trimmed on-chip oscillator
- See datasheet for additional features
Product DetailsThe ADuC7128 / ADuC7129 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating a high performance, multi-channel analog-to-digital converter (ADC), DDS with line driver, 16-/32-bit MCU, and Flash/EE memory on a single chip.
The ADC consists of up to 14 single-ended inputs. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 to VREF. Low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.
The ADuC7128/ADuC7129 integrate a differential line driver output. This line driver transmits a sine wave whose values are calculated by an on-chip DDS or a voltage output determined by the DACDAT MMR.
The devices operate from an on-chip oscillator and 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-/32-bit reduced instruction set computer (RISC), offering up to 41 MIPS peak performance. There are 126 kB of nonvolatile Flash/EE provided on-chip, as well as 8 kB of SRAM. The ARM7TDMI core views all memory and registers as a single linear array.
On-chip factory firmware supports in-circuit serial download via the UART serial interface port, and 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 parts operate from 3.0 V to 3.6 V and are specified over an industrial temperature range of −40°C to +125°C. When operating at 41.78 MHz, the power dissipation is 135 mW. The line driver output, if enabled, consumes an additional 30 mW.
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The ADuC7128 is a fully integrated, 1 MSPS, 12-bit data acquisition system incorporating a high performance, multichannel analog-to-digital converter (ADC), DDS with line driver, 16-/32-bit MCU, and Flash/EE memory on a single chip.
The QuickStart Plus Kits for the ADuC7128 Precision Analog Microcontrollers feature debug via UART and an assembly & C-source debugging environment. In addition the QuickStart Plus Kit allows true non-intrusive JTAG emulation. These kits are intended for any new users who want to have a comprehensive hardware development environment.
Documentation & Resources
AN-759: Expanding the Number of DAC Outputs on the ADuC8xx and ADuC702x Families (uC012) (Rev. 0)2/14/2015
AN-831: Implementing a Counter with the ADuC702x Family (Rev. A)3/31/2006
AN-765: Measuring Duration of a Short Pulse on the ADuC702x Family (Rev. 0)3/31/2006
AN-724: ADuC702x Serial Download Protocol (Rev. C)12/21/2004
RS-485 Communication Link vs. the Electric Fence: A Demonstration of RS-485 EMC Robustness11/1/2013
Part 2: Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards9/10/2009
Part 1: Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards9/10/2009
Integrated Route Taken to Pulse Oximetry12/26/2004
Precision Analog Microcontroller Simplifies Optical Transceiver Design6/3/2004
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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.