ADUC834
MicroConverter®, Dual 16-Bit/24-Bit Σ-Δ ADCs with Embedded 62 kB Flash MCU
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Overview
Features and Benefits
- High Resolution - ADCs
- 2 Independent ADCs (16-Bit and 24-Bit Resolution)
- 24-Bit No Missing Codes, Primary ADC
- 21-Bit rms (18.5-Bit p-p) Effective Resolution @ 20 Hz
- Offset Drift 10 nV/C, Gain Drift 0.5 ppm/C
- Memory
- 62 Kbytes On-Chip Flash/EE Program Memory
- 4 Kbytes On-Chip Flash/EE Data Memory
- Flash/EE, 100 Year Retention, 100 Kcycles Endurance
- 3 Levels of Flash/EE Program Memory Security
- In-Circuit Serial Download (No External Hardware)
- High Speed User Download (5 Seconds)
- 2304 Bytes On-Chip Data RAM
- 8051-Based Core
- 8051 Compatible Instruction Set
- 32 kHz External Crystal
- On-Chip Programmable PLL (12.58 MHz Max)
- 3 16-Bit Timer/Counter
- 26 Programmable I/O Lines
- 11 Interrupt Sources, Two Priority Levels
- Dual Data Pointer, Extended 11-Bit Stack Pointer
- See data sheet for additional features
Product Details
The ADuC834 is a complete smart transducer front end, integrating two high resolution - ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip.
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 and programmable output data rates are intended for the measurement of wide dynamic range, low frequency signals, such as those in weigh scale, strain-gage, pressure transducer, or temperature measurement applications.
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 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 with 12 core clock periods per machine cycle.
62 Kbytes of nonvolatile Flash/EE program memory, 4 Kbytes of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM are provided on-chip. The program memory can be configured as data memory to give up to 60 Kbytes of NV data memory in data logging applications.
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. The ADuC834 is supported by a QuickStart™ development system featuring low cost software and hardware development tools.
Applications
- Intelligent sensors
- Weigh scales
- Portable instrumentation, battery-powered systems
- 4–20 mA transmitters
- Data logging
- Precision system monitoring
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-282: Fundamentals of Sampled Data Systems2/14/2015
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AN-644: Frequency Measurement Using Timer 2 on a MicroConverter® (uC013) (Rev. 0)2/14/2015
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• AN-644 Files (uC013)
ZIP -
AN-645: Interfacing an HD44780 Character LCD to a MicroConverter® (uC014) (Rev. 0)2/14/2015
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• AN-645 Files (uC014)
ZIP -
AN-660: XY-Matrix Keypad Interface to MicroConverter® (Rev. 0)2/14/2015
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• AN-660 Accompanying Source Code
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AN-759: Expanding the Number of DAC Outputs on the ADuC8xx and ADuC702x Families (uC012) (Rev. 0)2/14/2015
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• AN-759 Companion Code (zip, 3,464 bytes)
ZIP -
AN-709: RTD Interfacing and Linearization Using an ADuC8xx MicroConverter® (Rev. 0)2/14/2015
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• AN-709 Accompanying Files (Tools and Source Code)
ZIP -
AN-1139: Understanding the Parallel Programming Protocol (Rev. 0)1/24/2012
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AN-1074: Understanding the Serial Download Protocol (Formerly uC004) (Rev. 0)8/10/2010
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UC-018: Uses of the Time Interval Counter (Rev. prA)7/10/2009
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• uC018 Files
ZIP -
UC-001: MicroConverter® I2C® Compatible Interface7/10/2009
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• uC001 Files
ZIP -
UC-002: Developing in C with the Keil uVision2 IDE7/10/2009
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• uC002 Files
ZIP -
UC-007: User Download (ULOAD) Mode7/10/2009
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• uC007 Files
ZIP -
UC-009: Addressing 16MB of External Data Memory8/3/2004
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UC-006: A 4-wire UART-to-PC Interface8/3/2004
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• uC006 Gerber File (1)
ZIP -
• uC006 Files
ZIP -
• uC006 Gerber Files (2)
ZIP -
UC-008: Using the ADuC834 C-library8/3/2004
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Integrated Route Taken to Pulse Oximetry12/26/2004
Software & Systems Requirements
Code Examples
ADuC834 Code Examples
Tools & Simulations
Design Tools
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADUC834BCPZ | Material Declaration | Reliability Data | 56-Lead LFCSP (8mm x 8mm w/ EP) | |
| ADUC834BSZ | Material Declaration | Reliability Data | 52-Lead MQFP (10mm x 10mm) | |
| Wafer Fabrication Data |
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Sample & Buy
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Lead Times
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Evaluation Boards
Pricing displayed is based on 1-piece.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.