Overview
The ADUC845BCP62-3, produced by Analog Devices Inc., is a MicroConverter that integrates high-resolution Σ-Δ analog-to-digital converters (ADCs) with an embedded microcontroller and nonvolatile memory. This device is part of the ADuC845 family, which includes the ADuC847 and ADuC848. The ADUC845BCP62-3 is designed for applications requiring high precision and multiple analog input channels.
It features a single-cycle 8052-based core, providing up to 12.58 MIPs performance while maintaining 8051 instruction set compatibility. The device includes 62 kbytes of on-chip Flash/EE program memory, 4 kbytes of Flash/EE data memory, and 2304 bytes of data RAM. This makes it suitable for a wide range of applications, including multichannel sensor monitoring, industrial instrumentation, and precision system monitoring.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| ADC Resolution | 24-bit | - | No missing codes, 22-bit rms (19.5 bit p-p) effective resolution |
| ADC Input Channels | Up to 10 | - | Flexible input multiplexing |
| Program Memory | 62 kbytes | - | On-chip Flash/EE program memory |
| Data Memory | 4 kbytes Flash/EE, 2304 bytes RAM | - | On-chip Flash/EE data memory and data RAM |
| Microcontroller Core | 8052-based, single-cycle | - | Up to 12.58 MIPs performance, 8051 instruction set compatible |
| Clock Frequency | Up to 12.58 MHz | - | Generated by on-chip PLL from 32 kHz external crystal |
| Power Supply | 3 V or 5 V | - | Normal mode: 4.8 mA max at 3.6 V; Power-down: 20 μA max with wake-up timer running |
| Package and Temperature Range | 56-lead LFCSP (8 mm × 8 mm), −40°C to +85°C | - | - |
Key Features
- High-resolution Σ-Δ ADCs: Two independent 24-bit ADCs on the ADuC845, with internal buffering and PGA on the primary ADC.
- Flexible Input Multiplexing: Up to 10 ADC input channels with flexible input multiplexing.
- On-chip Peripherals: Includes 12-bit voltage output DAC, dual 16-bit Σ-Δ DACs, on-chip temperature sensor (ADuC845 only), dual excitation current sources, time interval counter, UART, SPI, and I2C serial I/O.
- Memory: 62 kbytes on-chip Flash/EE program memory, 4 kbytes on-chip Flash/EE data memory, and 2304 bytes of data RAM.
- Security: Three levels of Flash/EE program memory security.
- Power Management: Internal power-on reset circuit, power supply monitor, watchdog timer, and low power consumption in power-down mode.
Applications
- Multichannel Sensor Monitoring: Suitable for monitoring multiple sensors in industrial and environmental settings.
- Industrial/Environmental Instrumentation: Ideal for weigh scales, pressure sensors, and temperature monitoring.
- Portable Instrumentation: Battery-powered systems benefit from its low power consumption.
- Data Logging: Can be configured for data logging applications with up to 60 kbytes of NV data memory.
- Precision System Monitoring: Used in applications requiring high precision and low frequency signal measurement.
Q & A
- What is the resolution of the ADCs in the ADUC845BCP62-3?
The ADUC845BCP62-3 features two independent 24-bit Σ-Δ ADCs with no missing codes and 22-bit rms (19.5 bit p-p) effective resolution.
- How many ADC input channels does the ADUC845BCP62-3 support?
The device supports up to 10 ADC input channels with flexible input multiplexing.
- What type of microcontroller core does the ADUC845BCP62-3 use?
The ADUC845BCP62-3 uses an 8052-based, single-cycle microcontroller core with up to 12.58 MIPs performance and 8051 instruction set compatibility.
- What is the clock frequency range of the ADUC845BCP62-3?
The clock frequency can be generated up to 12.58 MHz by the on-chip PLL from a 32 kHz external crystal.
- What are the power supply options for the ADUC845BCP62-3?
The device can operate from either a 3 V or 5 V power supply.
- What is the typical power consumption of the ADUC845BCP62-3 in normal mode?
The typical power consumption is 4.8 mA max at 3.6 V with the core clock at 1.57 MHz.
- What is the power consumption in power-down mode?
The power consumption in power-down mode is 20 μA max with the wake-up timer running.
- What types of on-chip peripherals are available on the ADUC845BCP62-3?
The device includes on-chip peripherals such as a 12-bit voltage output DAC, dual 16-bit Σ-Δ DACs, an on-chip temperature sensor, dual excitation current sources, time interval counter, UART, SPI, and I2C serial I/O.
- What are the memory options available on the ADUC845BCP62-3?
The device features 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 common applications of the ADUC845BCP62-3?
