ADUC816BSZ Part Information

Details for ADUC816BSZ by Analog Devices

Electronic & Electrical Components>Semiconductors - ICs>Microcontrollers - MCU

Part Description

The ADuC816 is a complete smart transducer front-end, inte- grating two high-resolution sigma-delta ADCs, an 8-bit MCU, and program/data Flash/EE Memory on a single chip. This low power device accepts low-level signals directly from a transducer. 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 filtering are intended for the measurement of wide dynamic range, low frequency signals, such as those in weigh scale, strain gauge, pressure transducer, or temperature measurement applications. The ADC output data rates are programmable and the ADC output resolution will vary with the programmed gain and output rate. 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, in turn, 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. The microcontroller core machine cycle consists of 12 core clock periods of the selected core operating frequency. 8 Kbytes of nonvolatile Flash/EE program memory are provided on-chip. 640 bytes of nonvolatile Flash/EE data memory and 256 bytes RAM are also integrated on-chip. The ADuC816 also incorporates additional analog functionality with a 12-bit DAC, current sources, power supply monitor, and a bandgap reference. On-chip digital peripherals include a watchdog timer, time interval counter, three timers/counters, and three serial I/O ports (SPI, UART, and I2C-compatible). 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. A functional block diagram of the ADuC816 is shown above with a more detailed block diagram shown in Figure 12. The part operates from a single 3 V or 5 V supply. When operating from 3 V supplies, the power dissipation for the part is below 10 mW. The ADuC816 is housed in a 52-lead MQFP package. The part operates from a single 3 V or 5 V supply. When operating from 3 V supplies, the power dissipation for the part is below 10 mW. The ADuC816 is housed in 52-lead MQFP and 56-lead LFCSP packages.

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Part Features

  • High-Resolution Sigma-Delta ADCs Dual 16-Bit Independent ADCs Programmable Gain Front End 16-Bit No Missing Codes, Primary ADC 13-Bit p-p Resolution @ 20 Hz, 20 mV Range 16-Bit p-p Resolution @ 20 Hz, 2.56 V Range Memory 8 Kbytes On-Chip Flash/EE Program Memory 640 Bytes On-Chip Flash/EE Data Memory Flash/EE, 100 Year Retention, 100 Kcycles Endurance 256 Bytes On-Chip Data RAM 8051-Based Core 8051-Compatible Instruction Set (12.58 MHz Max) 32 kHz External Crystal, On-Chip Programmable PLL Three 16-Bit Timer/Counters 26 Programmable I/O Lines 11 Interrupt Sources, Two Priority Levels Power Specified for 3 V and 5 V Operation Normal: 3 mA @ 3 V (Core CLK = 1.5 MHz) Power-Down: 20 u0005A (32 kHz Crystal Running) On-Chip Peripherals On-Chip Temperature Sensor 12-Bit Voltage Output DAC Dual Excitation Current Sources Reference Detect Circuit Time Interval Counter (TIC) UART Serial I/O I2Cu00ae-Compatible and SPIu00ae Serial I/O Watchdog Timer (WDT), Power Supply Monitor (PSM)

Part Specifications

Product Range ADUC Family ADUC8 Series Microcontrollers
Architecture -
No. of Bits 16bit
CPU Speed 12.58MHz
Program Memory Size 8KB, 8KB
RAM Memory Size 256Byte
No. of Pins 52Pins
MCU Case Style MQFP
No. of I/O's 34I/O's
Embedded Interface Type I2C SPI UART
Supply Voltage Min 2.7V
Supply Voltage Max 3.3V
MCU Family ADuC
MCU Series ADUC8
RoHS Phthalates Compliant Yes
MSL MSL 3 - 168 hours
SVHC No SVHC (07-Jul-2017)
Controller Family/Series (8052) ADuC
EEPROM Memory Size 640Byte
MPU Core Size 8bit
Operating Temperature Max 85°C
Operating Temperature Min -40°C
Peripherals ADC Comparator DAC PWM Timer
RoHS Compliant

Alternative Part Descriptions

  • Microcontroller,816BSZ 8k 3/5V 2xADC-16 | RS Components

Engineeer Comments

Getting sensor data into a microcontroller usually requires quite a bit of searching. Analog Devices - the company is an expert for all things ADC - now provides a microcontroller which is especially well-suited to data acquisition.

The ADUC816BSZ analog digital converter leaves nothing to be desired. It supports differential mode with input voltages ranging down to 20mV, and draws less than 1nA of input current. In addition to that, the part is a true analog powerhouse - it has a 12bit DAC and even a current source for driving sensors.

While the part at hand most definitely cuts down your BOM by eliminating external signal conditioning logic, do keep in mind that the most expensive part of a microcontroller system usually is its software. If your company has no experience with 8051 systems, think long before committing to the switch. If you, however, are comfortable around this evergreen, definitely give the ADUC816BSZ a chance!

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The ADUC816BSZ is listed under Electronic & Electrical Components > Semiconductors - ICs > Microcontrollers - MCU.

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Is the ADUC816BSZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

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