Overview
The ADUC836BCPZ-REEL, produced by Analog Devices Inc., is a comprehensive smart transducer front end that integrates two high-resolution Σ-Δ (Sigma-Delta) Analog-to-Digital Converters (ADCs), an 8-bit microcontroller (MCU), and program/data Flash/EE memory on a single chip. This device is designed to measure wide dynamic range, low-frequency signals, making it suitable for applications such as weigh scales, strain gauges, pressure transducers, and temperature measurements. The ADUC836 operates from a 32 kHz crystal with an on-chip Phase-Locked Loop (PLL) generating a high-frequency clock of 12.58 MHz, which is then routed through a programmable clock divider to generate the MCU core clock frequency.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Conversion Rate | 5.4 Hz min, 105 Hz max | Hz | Programmable in 0.732 ms increments |
| Resolution | 16 bits | Bits | No missing codes, primary ADC |
| Output Noise | Varies with selected update rate and gain range | V | See Tables X and XI in datasheet |
| Integral Nonlinearity | ±15 ppm of FSR max | ppm | Auxiliary ADC |
| Offset Error | –2 LSB typ | LSB | Auxiliary ADC |
| Offset Error Drift | 1 μV/°C typ | μV/°C | Auxiliary ADC |
| Full-Scale Error | –2.5 LSB typ | LSB | Auxiliary ADC |
| Gain Error Drift | ±0.5 ppm/°C typ | ppm/°C | Auxiliary ADC |
| Memory | 62 Kbytes nonvolatile Flash/EE program memory, 4 Kbytes nonvolatile Flash/EE data memory, 2304 bytes data RAM | Kbytes/bytes | |
| Operating Voltage | 2.7 V to 3.6 V or 4.75 V to 5.25 V | V | AVDD and DVDD |
| Package | 56-Lead LFCSP (8mm x 8mm w/ EP) |
Key Features
- Dual 16-bit Σ-Δ ADCs with on-chip digital filtering and programmable output data rates.
- Temperature sensor and Programmable Gain Amplifier (PGA) for direct measurement of low-level signals.
- 8-bit MCU core compatible with the 8051 instruction set.
- 62 Kbytes of nonvolatile Flash/EE program memory, 4 Kbytes of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM.
- Programmable clock divider and on-chip PLL generating a high-frequency clock of 12.58 MHz.
- Support for in-circuit serial download and debug modes via UART, and single-pin emulation mode via the EA pin.
- On-chip factory firmware and QuickStart™ development system for low-cost software and hardware development tools.
- POR, PSM, PWM, temperature sensor, and watchdog timer (WDT) features.
Applications
- Weigh scales and strain gauges.
- Pressure transducers and temperature measurement systems.
- Data logging applications where up to 60 Kbytes of NV data memory can be configured.
- Industrial automation and control systems requiring precise measurement of low-frequency signals.
Q & A
- What is the primary function of the ADUC836?
The ADUC836 is a smart transducer front end that integrates dual 16-bit Σ-Δ ADCs, an 8-bit MCU, and program/data Flash/EE memory for measuring wide dynamic range, low-frequency signals. - What is the resolution of the ADCs in the ADUC836?
The ADCs have a resolution of 16 bits with no missing codes. - What is the operating voltage range for the ADUC836?
The device operates within the voltage range of 2.7 V to 3.6 V or 4.75 V to 5.25 V for AVDD and DVDD. - What type of memory does the ADUC836 have?
The ADUC836 has 62 Kbytes of nonvolatile Flash/EE program memory, 4 Kbytes of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM. - What is the clock frequency generated by the on-chip PLL?
The on-chip PLL generates a high-frequency clock of 12.58 MHz from a 32 kHz crystal. - Does the ADUC836 support in-circuit programming and debugging?
Yes, it supports in-circuit serial download and debug modes via UART, as well as single-pin emulation mode via the EA pin. - What are some common applications of the ADUC836?
Common applications include weigh scales, strain gauges, pressure transducers, and temperature measurement systems. - What is the package type for the ADUC836BCPZ-REEL?
The package type is a 56-Lead LFCSP (8mm x 8mm w/ EP). - Does the ADUC836 have any additional features like PWM or temperature sensor?
Yes, it includes features such as PWM, temperature sensor, and watchdog timer (WDT). - Is the ADUC836 supported by any development tools?
Yes, it is supported by a QuickStart™ development system featuring low-cost software and hardware development tools.
