Overview
The ADUC836BS, produced by Analog Devices Inc., is a comprehensive smart transducer front end. This integrated circuit combines two high-resolution sigma-delta (ΣΔ) analog-to-digital converters (ADCs), an 8-bit microcontroller (MCU), and both program and data Flash/EE memory on a single chip. This integration makes it highly suitable for various precision measurement and control applications.
Key Specifications
| Parameter | Specification |
|---|---|
| ADC Resolution | 2 Independent 16-Bit ΣΔ ADCs |
| ADC Performance | 16-Bit No Missing Codes, Primary ADC; 16-Bit rms (16-Bit p-p) Effective Resolution @ 20 Hz; Offset Drift 10 nV/℃, Gain Drift 0.5 ppm/℃ |
| Memory | 62 Kbytes On-Chip Flash/EE Program Memory; 4 Kbytes On-Chip Flash/EE Data Memory; 2304 Bytes On-Chip Data RAM |
| Microcontroller Core | 8051 Compatible Instruction Set; 32 kHz External Crystal |
| Operating Voltage | 2.7 V ~ 5.25 V |
| Operating Temperature Range | –40℃ to +125℃ |
| Storage Temperature Range | –65℃ to +150℃ |
| Junction Temperature | 150℃ |
| Thermal Impedance (MQFP) | 90℃/W |
| Thermal Impedance (LFCSP Base Floating) | 52℃/W |
| Lead Temperature, Soldering | 215℃ (Vapor Phase, 60 sec); 220℃ (Infrared, 15 sec) |
| Package | 52-MQFP (10x10) |
| Number of I/O Lines | 26 Programmable I/O Lines |
| Interrupt Sources | 11 Interrupt Sources, 2 Priority Levels |
| On-Chip Peripherals | Internal Power on Reset Circuit; 12-Bit Voltage Output DAC; PWM, Temp Sensor, WDT |
Key Features
- High Resolution ADCs: Two independent 16-bit ΣΔ ADCs with no missing codes, offering high precision and low drift.
- Memory: 62 Kbytes of on-chip Flash/EE program memory, 4 Kbytes of on-chip Flash/EE data memory, and 2304 bytes of data RAM.
- Microcontroller Core: 8051 compatible instruction set with a 32 kHz external crystal and an on-chip programmable PLL generating up to 12.58 MHz clock.
- On-Chip Peripherals: Internal power on reset circuit, 12-bit voltage output DAC, PWM, temperature sensor, and watchdog timer.
- Serial Communication: Extensive serial communication options including I²C, SPI, and UART/USART.
- Programmable Clock Divider: Allows for flexible clock frequency settings.
- Security Features: Three levels of Flash/EE program memory security.
- In-Circuit Serial Download: Supports in-circuit serial download and debug modes without external hardware.
Applications
- Intelligent Sensors: Suitable for precision sensing applications.
- Weigh Scales: Ideal for weight measurement due to its high-resolution ADCs.
- Portable Instrumentation: Used in battery-powered systems requiring low power consumption.
- 4–20 mA Transmitters: Applicable in industrial control systems.
- Data Logging: Can be configured to provide up to 60 Kbytes of NV data memory for data logging.
- Precision System Monitoring: Suitable for monitoring temperature, strain gage, and pressure transducer applications.
Q & A
- What is the ADUC836BS?
The ADUC836BS is a smart transducer front end integrating two high-resolution ΣΔ ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip.
- What are the key features of the ADUC836BS ADCs?
The ADCs are 16-bit ΣΔ converters with no missing codes, offering high resolution and low drift (10 nV/℃ offset drift, 0.5 ppm/℃ gain drift).
- What type of microcontroller core does the ADUC836BS use?
The ADUC836BS uses an 8051 compatible instruction set microcontroller core.
- What is the operating voltage range of the ADUC836BS?
The operating voltage range is 2.7 V to 5.25 V.
- What are the storage and operating temperature ranges for the ADUC836BS?
The storage temperature range is –65℃ to +150℃, and the operating temperature range is –40℃ to +125℃.
- What types of memory does the ADUC836BS have?
The ADUC836BS has 62 Kbytes of on-chip Flash/EE program memory, 4 Kbytes of on-chip Flash/EE data memory, and 2304 bytes of data RAM.
- What are some of the on-chip peripherals available on the ADUC836BS?
The on-chip peripherals include an internal power on reset circuit, a 12-bit voltage output DAC, PWM, temperature sensor, and watchdog timer.
- What serial communication options are available on the ADUC836BS?
The ADUC836BS supports I²C, SPI, and UART/USART serial communication options.
- What are some typical applications of the ADUC836BS?
Typical applications include intelligent sensors, weigh scales, portable instrumentation, 4–20 mA transmitters, data logging, and precision system monitoring.
- Is the ADUC836BS RoHS compliant?
Yes, the ADUC836BS is lead-free and RoHS compliant.
