Overview
The ADUC834BCPZ is a comprehensive smart transducer front end developed by Analog Devices Inc. This integrated circuit combines two high-resolution Σ-Δ ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip. The device is designed to measure wide dynamic range, low-frequency signals, making it suitable for applications such as weigh scales, strain-gage, pressure transducers, and temperature measurement. The microcontroller core is based on the 8052 architecture, ensuring compatibility with the 8051 instruction set. The ADUC834BCPZ operates from a 32 kHz crystal with an on-chip PLL generating a high-frequency clock of 12.58 MHz, and it supports in-circuit serial download and debug modes via UART.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Mfr | Analog Devices Inc. | Series | MicroConverter® ADuC8xx |
| Product Status | Obsolete | Core Processor | 8052 |
| Core Size | 8-Bit | Speed | 12.58 MHz |
| Connectivity | EBI/EMI, I²C, SPI, UART/USART | Peripherals | POR, PSM, PWM, Temp Sensor, WDT |
| Number of I/O | 34 | Program Memory Size | 62 KB (62K x 8) |
| Program Memory Type | FLASH | EEPROM Size | 4 K x 8 |
| RAM Size | 2.25 K x 8 | Voltage - Supply (Vcc/Vdd) | 2.7 V ~ 5.25 V |
| Data Converters | A/D 3x16b, 4x24b; D/A 1x12b | ADC Resolution | 24-Bit (Primary), 16-Bit (Auxiliary) |
| ADC Update Rate | 5.4 Hz min, 105 Hz max | Offset Error | ±3 μV typ |
| Offset Drift | ±10 nV/°C typ | Gain Error Drift | ±0.5 ppm/°C typ |
Key Features
- Two independent high-resolution Σ-Δ ADCs: 24-bit primary ADC and 16-bit auxiliary ADC with no missing codes and on-chip digital filtering.
- Integrated 8-bit MCU based on the 8052 architecture with 8051 instruction set compatibility.
- 62 KB of nonvolatile Flash/EE program memory, 4 KB of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM.
- In-circuit serial download and debug modes via UART, and single-pin emulation mode via the EA pin.
- Programmable clock divider and on-chip PLL generating a high-frequency clock of 12.58 MHz from a 32 kHz crystal.
- Three 16-bit timers, 26 programmable I/O lines, and 11 interrupt sources with two priority levels.
- Dual 16-bit PWM, temperature sensor, and PGA for direct measurement of low-level signals.
- High-speed user download capability in 5 seconds.
Applications
- Intelligent sensors
- Weigh scales
- Portable instrumentation and battery-powered systems
- 4–20 mA transmitters
- Data logging
- Precision system monitoring
Q & A
- Q: What is the ADUC834BCPZ?
A: The ADUC834BCPZ is a smart transducer front end integrating two high-resolution Σ-Δ ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip.
- Q: What are the key features of the ADUC834BCPZ?
A: Key features include two independent high-resolution ADCs, an 8052-based MCU, 62 KB of Flash/EE program memory, and various peripherals like timers, PWM, and a temperature sensor.
- Q: What are the typical applications of the ADUC834BCPZ?
A: Typical applications include intelligent sensors, weigh scales, portable instrumentation, 4–20 mA transmitters, data logging, and precision system monitoring.
- Q: What is the clock speed of the ADUC834BCPZ?
A: The device operates with a clock speed of 12.58 MHz generated by an on-chip PLL from a 32 kHz crystal.
- Q: How much memory does the ADUC834BCPZ have?
A: The ADUC834BCPZ has 62 KB of nonvolatile Flash/EE program memory, 4 KB of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM.
- Q: What is the resolution of the ADCs in the ADUC834BCPZ?
A: The primary ADC has a 24-bit resolution, and the auxiliary ADC has a 16-bit resolution.
- Q: Does the ADUC834BCPZ support in-circuit programming?
A: Yes, the ADUC834BCPZ supports in-circuit serial download and debug modes via UART.
- Q: What is the voltage supply range for the ADUC834BCPZ?
A: The voltage supply range is from 2.7 V to 5.25 V.
- Q: Is the ADUC834BCPZ RoHS compliant?
A: Yes, the ADUC834BCPZ is RoHS compliant.
- Q: Where can I find detailed information about the ADUC834BCPZ?
A: Detailed information can be found in the datasheet available on Analog Devices' website and other authorized distributors.
