ADUC831BSZ Electronic IC Chips MicroConverter , 12-Bit ADCs and DACs

MicroConverter® , 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU    

ADuC831

FEATURES

ANALOG I/O

  8-Channel, 247 kSPS 12-Bit ADC

      DC Performance: 1 LSB INL

      AC Performance: 71 dB SNR

  DMA Controller for High Speed ADC-to-RAM Capture

  2 12-Bit (Monotonic) Voltage Output DACs

  Dual Output PWM/- DACs

  On-Chip Temperature Sensor Function 3C

  On-Chip Voltage Reference

Memory

  62 kBytes On-Chip Flash/EE Program Memory

  4 kBytes On-Chip Flash/EE Data Memory

  Flash/EE, 100 Yr Retention, 100 kCycles Endurance

  2304 Bytes On-Chip Data RAM

8051 Based Core

  8051 Compatible Instruction Set (16 MHz Max)

  12 Interrupt Sources, 2 Priority Levels

  Dual Data Pointer

  Extended 11-Bit Stack Pointer

On-Chip Peripherals

  Time Interval Counter (TIC)

  UART, I² C^®, and SPI® Serial I/O

  Watchdog Timer (WDT), Power Supply Monitor (PSM)

Power

  Specified for 3 V and 5 V Operation

  Normal, Idle, and Power-Down Modes

  Power-Down: 20 A @ 3 V

APPLICATIONS

Optical Networking—Laser Power Control

Base Station Systems

Precision Instrumentation, Smart Sensors

Transient Capture Systems

DAS and Communications Systems

Pin compatible upgrade to existing ADuC812 systems that require additional code or data memory. Runs from 1 MHz–16 MHz to external crystal.

The ADuC832 is also available. Functionally is the same as the ADuC831, except the ADuC832 runs from a 32 kHz external crystal with on-chip PLL.

GENERAL DESCRIPTION

The ADuC831 is a fully integrated 247 kSPS data acquisition system incorporating a high performance self-calibrating multichannel 12-bit ADC, dual 12-bit DACs, and programmable 8-bit MCU on a single chip.

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 are provided on-chip. Four kBytes of nonvolatile Flash/EE data memory, 256 bytes RAM and 2 kBytes of extended RAM are also integrated on-chip.

The ADuC831 also incorporates additional analog functionality with two 12-bit DACs, power supply monitor, and a band gap reference. On-chip digital peripherals include two 16-bit Σ-∆ DACs, dual output 16-bit PWM, watchdog timer, time interval counter, three timers/counters, Timer 3 for baud rate generation and serial I/O ports (I2 C, SPI and UART).

On-chip factory firmware supports in-circuit serial download and debug modes (via UART), as well as single-pin emulation mode via the EA pin. The ADuC831 is supported by QuickStart™ and QuickStart Plus development systems featuring low cost software and hardware development tools. A functional block diagram of the ADuC831 is shown above with a more detailed block diagram shown in Figure 1.

The part is specified for 3 V and 5 V operation over the extended industrial temperature range, and is available in a 52-lead plastic quad flatpack package and in a 56-lead chip scale package.

FUNCTIONAL BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS* (TA = 25°C unless otherwise noted.)

AV_DD to DV_DD . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V

AGND to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V

DV_DD to DGND, AV_DD to AGND . . . . . . . . . –0.3 V to +7 V

Digital Input Voltage to DGND . . . . –0.3 V to DV_DD + 0.3 V

Digital Output Voltage to DGND . . . –0.3 V to DV_DD + 0.3 V

V_REF to AGND . . . . . . . . . . . . . . . . . –0.3 V to AV_DD + 0.3 V

Analog Inputs to AGND . . . . . . . . . . –0.3 V to AVDD + 0.3 V

Operating Temperature Range Industrial

    ADuC831BS . . . . . . . . . . . . . . . . . . . . . . –40°C to +125°C

Operating Temperature Range Industrial

    ADuC831BCP . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . 150°C θJA

Thermal Impedance (ADuC831BS) . . . . . . . . . . 90°C/W θJA

Thermal Impedance (ADuC831BCP) . . . . . . . . . 52°C/W

Lead Temperature, Soldering

    Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . 215°C

    Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C

*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

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