EVAL-ADUC836QS AD [Analog Devices], EVAL-ADUC836QS Datasheet

EVAL-ADUC836QS

Manufacturer Part Number

EVAL-ADUC836QS

Description

MicroConverter, Dual 16-Bit ADCs with Embedded 62 kB Flash MCU

Manufacturer

AD [Analog Devices]

Datasheet

1.EVAL-ADUC836QS.pdf (80 pages)

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reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

that may result from its use. No license is granted by implication or other-

wise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

FEATURES

High Resolution - ADCs

Memory

8051 Based Core

On-Chip Peripherals

Power

Package and Temperature Range

APPLICATIONS

Intelligent Sensors

Weigh Scales

Portable Instrumentation, Battery-Powered Systems

4–20 mA Transmitters

Data Logging

Precision System Monitoring

Time Interval Counter (Wake-Up/RTC Timer)

2 Independent ADCs (16-Bit Resolution)

16-Bit No Missing Codes, Primary ADC

16-Bit rms (16-Bit p-p) Effective Resolution @ 20 Hz

Offset Drift 10 nV/ C, Gain Drift 0.5 ppm/ C

62 Kbytes On-Chip Flash/EE Program Memory

4 Kbytes On-Chip Flash/EE Data Memory

Flash/EE, 100 Year Retention, 100 Kcycles Endurance

3 Levels of Flash/EE Program Memory Security

In-Circuit Serial Download (No External Hardware)

High Speed User Download (5 Seconds)

2304 Bytes On-Chip Data RAM

8051 Compatible Instruction Set

32 kHz External Crystal

On-Chip Programmable PLL (12.58 MHz Max)

26 Programmable I/O Lines

11 Interrupt Sources, 2 Priority Levels

Dual Data Pointer, Extended 11-Bit Stack Pointer

Internal Power on Reset Circuit

12-Bit Voltage Output DAC

Dual 16-Bit - DACs/PWMs

On-Chip Temperature Sensor

Dual Excitation Current Sources

UART, SPI

High Speed Baud Rate Generator (Including 115,200)

Watchdog Timer (WDT)

Power Supply Monitor (PSM)

Normal: 2.3 mA Max @ 3.6 V (Core CLK = 1.57 MHz)

Power-Down: 20 A Max with Wake-Up Timer Running

Speciﬁ ed for 3 V and 5 V Operation

52-Lead MQFP (14 mm

56-Lead CSP (8 mm

16-Bit Timer/Counter

, and I

Serial I/O

8 mm), –40 C to +85 C

14 mm), –40 C to +125 C

ADCs with Embedded 62 kB Flash MCU

MicroConverter

REFIN–

REFIN+

RESET

GENERAL DESCRIPTION

The ADuC836 is a complete smart transducer front end, integrating

two high resolution - ADCs, an 8-bit MCU, and program/data

Flash/EE memory on a single chip.

The two independent ADCs (primary and auxiliary) include a

temperature sensor and a PGA (allowing direct measurement

of low level signals). The ADCs with on-chip digital ﬁ ltering and

programmable output data rates are intended for the measure-

ment of wide dynamic range, low frequency signals, such as those

in weigh scale, strain gage, pressure transducer, or temperature

measurement applications.

The device operates from a 32 kHz crystal with an on-chip PLL

generating a high frequency clock of 12.58 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 8052 and therefore 8051 instruction set compatible

with 12 core clock periods per machine cycle.

62 Kbytes of nonvolatile Flash/EE program memory, 4 Kbytes of

nonvolatile Flash/EE data memory, and 2304 bytes of data RAM

are provided on-chip. The program memory can be conﬁ gured as

data memory to give up to 60 Kbytes of NV data memory in data

logging applications.

On-chip factory ﬁ rmware supports in-circuit serial download and

debug modes (via UART), as well as single-pin emulation mode

via the

development system featuring low cost software and hardware

development tools.

One Technology Way, P .O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

DGND

AIN1

AIN2

AIN3

AIN4

AIN5

XTAL1

EXTERNAL

DETECT

POR

MUX

OSC

REF

pin. The ADuC836 is supported by a QuickStart™

XTAL2

FUNCTIONAL BLOCK DIAGRAM

SENSOR

AGND

TEMP

PLL AND PROG

CLOCK DIV

BUF

RTC TIMER

BAND GAP

INTERNAL

WAKE- UP/

REF

PGA

16-BIT -

AUXILIARY

, Dual 16-Bit -

ADuC836

16-BIT -

BAUD R ATE TIMER

ADC

62 KBYTES FLASH/EE PROGRAM MEMORY

PRIMARY

4 KBYTES FLASH/EE DATA MEMORY

8051-BASED MCU WITH ADDITIONAL

16 BIT TIMERS

PORTS

PARALLEL

ADC

2304 BYTES USER RAM

PERIPHERALS

ADuC836

16-BIT

DUAL

16-BIT

12-BIT

- DAC

DUAL

PWM

DAC

POWER SUPPLY MON

WATCHDOG TIMER

UART, SPI, AND I

SERIAL I/O

www.analog.com

CURRENT

SOURCE

MUX

BUF

IEXC1

IEXC2

DAC

PWM0

PWM1

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