ADUC7128 Precision Analog Microcontroller ARM7TDMI® MCU with 12-Bit ADC and DDS DAC

The 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.

Features and Benefits

Multi-Channel, 12-bit, 1MSPS ADC
Up to 14 analog-to-digital converter (ADC) channels
Fully differential and single-ended modes
0 to V_REF 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
126 kB Flash/EE memory, 8 kB SRAM
In-Circuit Download, JTAG based Debug
Software triggered in-circuit re-programmability

2 x UART, 2 x I2C® and SPI Serial I/O
Up to 40-pin GPIO port
5 X General Purpose Timers
Wake-up and watchdog timers (WDT)
Power Supply Monitor
16-bit PWM generator
Quadrature Encoder
Programmable Logic Array (PLA)
Specified for 3V operation
Active Mode:
11 mA (@ 5.22 MHz)
45 mA (@ 41.78 MHz)
64-lead 9 mm × 9 mm LFCSP package, −40°C to 125°C
64-lead LQFP, −40°C to +125°C
80-lead LQFP, −40°C to +125°C
Low-Cost QuickStart Development System
Full Third-Party Support

Processors & DSP

ARM7 Core Products

Building Technology

Building Control and Automation

Data Sheets

Document	note
ADuC7128/ADuC7129: Precision Analog Microcontroller ARM7TDMI® MCU with 12-Bit ADC and DDS DAC Data Sheet (Rev. 0) ADuC7128/ADuC7129 Anomaly Data Sheet Rev. 0	PDF 1801 kB

Application Notes

Document	note
AN-759: Expanding the Number of DAC Outputs on the ADuC8xx and ADuC702x Families (uC012) (Rev. 0) AN-759 Companion Code (zip, 3,464 bytes)	PDF 112 kB
AN-831: Implementing a Counter with the ADuC702x Family (Rev. A)	PDF 83 kB
AN-765: Measuring Duration of a Short Pulse on the ADuC702x Family (Rev. 0)	PDF 108 kB
AN-724: ADuC702x Serial Download Protocol (Rev. C)	PDF 141 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADUC7128BCPZ126 Production	64 ld LFCSP (9x9mm, 4.70mm exposed pad)	OTH 260	-40 to 125C	7.99	7.03	Y
ADUC7128BCPZ126-RL Production	64 ld LFCSP (9x9mm, 4.70mm exposed pad)	REEL 2500	-40 to 125C	0	7.03	Y
ADUC7128BSTZ126 Production	64 ld LQFP (10x10mm)	OTH 160	-40 to 125C	8.3	7.31	Y
ADUC7128BSTZ126-RL Production	64 ld LQFP (10x10mm)	REEL 1500	-40 to 125C	0	7.31	Y