ADUC841 Precision Analog Microcontroller: 20MIPS 8052 Flash MCU + 8-Ch 12-Bit ADC + Dual 12-Bit DAC

The ADuC841/ADuC842/ADuC843 are complete smart transducer front ends, that integrates a high performance selfcalibrating multichannel ADC, a dual DAC, and an optimized single-cycle 20 MHz 8-bit MCU (8051 instruction set compatible) on a single chip.

The ADuC841 and ADuC842 are identical with the exception of the clock oscillator circuit; the ADuC841 is clocked directly from an external crystal up to 20 MHz whereas the ADuC842 uses a 32 kHz crystal with an on-chip PLL generating a programmable core clock up to 16.78 MHz.

The ADuC843 is identical to the ADuC842 except that the ADuC843 has no analog DAC outputs.

The microcontroller is an optimized 8052 core offering up to 20 MIPS peak performance. Three different memory options are available offering up to 62 kBytes of nonvolatile Flash/EE program memory. Four kBytes of nonvolatile Flash/EE data memory, 256 bytes RAM, and 2 kBytes of extended RAM are also integrated on-chip.

Applications

Features and Benefits

Pin compatible upgrade of ADuC812/ADuC831/ADuC832

Increased performance Single-cycle 20 MIPS 8052 core High speed 420 kSPS 12-bit ADC
Increased memory Up to 62 kBytes on-chip Flash/EE program memory 4 kBytes on-chip Flash/EE data memory
In-circuit reprogrammable Flash/EE, 100 year retention, 100 kCycle endurance 2304 bytes on-chip data RAM
Smaller package 8 mm × 8 mm chip scale package 52-lead PQFP—pin-compatible upgrade

Increased performance
Single-cycle 20 MIPS 8052 core
High speed 420 kSPS 12-bit ADC

Increased memory
Up to 62 kBytes on-chip Flash/EE program memory
4 kBytes on-chip Flash/EE data memory

In-circuit reprogrammable
Flash/EE, 100 year retention, 100 kCycle endurance
2304 bytes on-chip data RAM

Smaller package
8 mm × 8 mm chip scale package
52-lead PQFP—pin-compatible upgrade

Analog I/O

8-channel, 420 kSPS high accuracy, 12-bit ADC
On-chip, 15 ppm/°C voltage reference
DMA controller, high speed ADC-to-RAM capture
Two 12-bit voltage output DACs1
Dual output PWM ∑-∆ DACs
On-chip temperature monitor function

8-channel, 420 kSPS high accuracy, 12-bit ADC

On-chip, 15 ppm/°C voltage reference

DMA controller, high speed ADC-to-RAM capture

Two 12-bit voltage output DACs1

Dual output PWM ∑-∆ DACs

On-chip temperature monitor function

8052 based core

8051 compatible instruction set (20 MHz max)

8051 compatible instruction set (20 MHz max)

See data sheet for additional features

Processors & DSP

8052 Core Products

Data Sheets

Document	note
ADuC841/ADuC842/ADuC843: MicroConverter, 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU Data Sheet (Rev. A)	PDF 932.72 K
ADuC841/ADuC842/ADuC843: Anomaly Sheet for Silicon Rev. E	PDF 110.1 K
ADuC841/ADuC842/ADuC843: Anomaly Sheet for Silicon Rev. F	PDF 102.32 K

Application Notes

Document	note
AN-282: Fundamentals of Sampled Data Systems	PDF 2131 kB
AN-660: XY-Matrix Keypad Interface to MicroConverter® (Rev. 0) AN-660 Accompanying Source Code	PDF 286 kB
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-709: RTD Interfacing and Linearization Using an ADuC8xx MicroConverter&® (Rev. 0) AN-709 Accompanying Files (Tools and Source Code)	PDF 698 kB
AN-1139: Understanding the Parallel Programming Protocol (Rev. 0)	PDF 174 kB
AN-1074: Understanding the Serial Download Protocol (Formerly uC004) (Rev. 0)	PDF 245 kB
UC-009: Addressing 16MB of External Data Memory	PDF 173 kB
UC-006: A 4-wire UART-to-PC Interface uC006 Gerber File (1) uC006 Files uC006 Gerber Files (2)	PDF 157.71 K

User Guides

Document	note
UG-041: ADuC8xx Evaluation Kit Getting Started User Guide	PDF 679 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADUC841BCPZ62-3 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	11.08	9.76	Y
ADUC841BCPZ62-5 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	11.08	9.76	Y
ADUC841BCPZ8-3 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	7.54	6.64	Y
ADUC841BCPZ8-5 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	7.54	6.64	Y
ADUC841BS62-3 Obsolete	52 ld MQFP (13.90mm width)	OTH 96		0	0	N
ADUC841BSZ62-3 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 85C	11.08	9.76	Y
ADUC841BSZ62-5 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 85C	11.08	9.76	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-ADUC841QSPZ	ADuC841 Quickstart Plus development system	99	Y
EVAL-ADUC841QSZ	ADuC841 Quickstart development system	59	Y
EVAL-ADUC-CABLE1Z	UART Serial downloader cable	15.18	Y
USB-EA-CONVZ	USB-EA Emulator	75	Y