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Analog Devices Inc. ADUC824BSZ-REEL
- Part No.:
- ADUC824BSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Microcontrollers
- Package:
- 52-QFP
- Datasheet:
-
ADUC824BSZ-REEL.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 52MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,539
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Product details
Overview
ADUC824BSZ-REEL from Analog Devices is a fully integrated MicroConverter®-an 8051-compatible flash microcontroller with dual high-resolution sigma-delta ADCs (24-bit primary, 16-bit auxiliary), 8 KB flash program memory, 640 bytes flash data memory, and on-chip 12-bit DAC-designed for precision sensor front-end applications including weigh scales, pressure transducers, and 4–20 mA transmitters.
For engineers reviewing the ADUC824BSZ-REEL datasheet, ADUC824BSZ-REEL pinout, ADUC824BSZ-REEL application, or ADUC824BSZ-REEL equivalent, this page delivers verified technical context, exact pin functions, real-world use-value per application, and two validated alternative parts with documented functional and selection differences.
Technical Context
The ADUC824BSZ-REEL integrates two independent sigma-delta ADCs: the primary 24-bit ADC achieves 18-bit peak-to-peak resolution at 20 Hz with ±2.56 V range and 13-bit p-p at ±20 mV; the auxiliary 16-bit ADC supports unipolar 0–2.5 V input. Both feature programmable gain amplifiers, burnout current sources, excitation current sources, and reference detect circuitry.
It employs an on-chip PLL locked to a 32.768 kHz crystal to generate a 12.58 MHz system clock, with programmable core clock division down to 98.3 kHz. The MCU core is 8052-based (12-clock-per-cycle), supporting UART, SPI®, and I²C® serial interfaces, watchdog timer, power supply monitor, and time interval counter-all operating from single 3 V or 5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Primary: 24-bit no-missing-codes; Auxiliary: 16-bit - enables direct digitization of low-level transducer signals without external signal conditioning. |
| Flash Memory | 8 KB program + 640 B data flash/EE - supports field-upgradable firmware and calibrated sensor coefficients with 100-year retention. |
| Core Clock | Programmable 98.3 kHz to 12.58 MHz via PLL and divider - balances processing throughput against power consumption in battery-operated instruments. |
| DAC Output | 12-bit voltage-output DAC with 0–VREF or 0–AVDD range - provides precise analog feedback or calibration reference in closed-loop systems. |
| Power Consumption | 3 mA @ 3 V / 1.57 MHz normal mode; 20 µA power-down with 32 kHz crystal running - suitable for portable, low-duty-cycle measurement devices. |
| Operating Voltage | AVDD/DVDD independently configurable for 2.7–3.6 V or 4.75–5.25 V - allows mixed-signal partitioning and noise isolation between analog/digital domains. |
| Temperature Range | –40°C to +85°C - qualified for industrial and embedded environments without derating. |
Pinout & Package
The ADUC824BSZ-REEL is housed in a 52-lead MQFP (Metric Quad Flat Package) with 0.65 mm lead pitch, thermally enhanced for stable analog performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN5 | Primary ADC analog inputs | Differential/bipolar/unipolar configurable inputs accepting ±20 mV to ±2.56 V ranges with PGA gain control. |
| REFIN+, REFIN− | External reference inputs | Accept 1–AVDD reference voltage; internal 1.25 V (ADC) and 2.5 V (DAC) references also available. |
| IEXC1, IEXC2 | Excitation current outputs | ±200 µA programmable current sources for RTD or bridge sensor biasing with <±1% matching. |
| XTAL1, XTAL2 | 32.768 kHz crystal interface | Low-frequency crystal input/output driving on-chip PLL; supports oscillator power-down for ultra-low-power sleep modes. |
| P0.0–P0.7, P1.0–P1.7, P2.0–P2.7, P3.0–P3.7 | General-purpose I/O ports | 26 programmable digital I/O lines with internal pull-ups; Port 0 doubles as multiplexed address/data bus for external memory expansion. |
| TXD, RXD, SCLK, SDATA, SS | Serial interface pins | Hardware UART, SPI, and I²C-compatible ports enable sensor fusion, host communication, and peripheral daisy-chaining. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | On-die sensor with ±2°C accuracy enables self-compensation of ADC offset/gain drift in environmental monitoring. |
| Dual independent ADCs | Simultaneous sampling of primary (24-bit) and auxiliary (16-bit) channels supports multi-sensor acquisition without external MUX or timing coordination. |
| Factory firmware debug support | In-circuit serial download and single-pin emulation via EA pin eliminate need for external debug probes during development. |
| Transducer-specific analog peripherals | Burnout current sources (±100 nA), excitation sources (±200 µA), and reference detect simplify 4–20 mA loop and IEEE 1451.2 smart sensor designs. |
| Power supply monitor (PSM) | Four user-selectable AVDD/DVDD trip points (2.63–4.63 V) with ±3.5% accuracy prevent brownout-induced firmware corruption. |
Applications
| Intelligent Weigh Scale System | Industrial Pressure Transducer |
|---|---|
|
Use Scenario: High-precision load cell readout with auto-zero, span calibration, and digital filtering in commercial bench scales. IC Role / Device Role / Timing Role: Primary ADC digitizes mV-level bridge output; MCU executes calibration algorithms; DAC provides analog tare compensation. Use Value: 24-bit no-missing-codes resolution and 18-bit p-p noise performance at 20 Hz enable sub-gram repeatability without external amplification. |
Use Scenario: 4–20 mA current-loop transmitter for differential pressure sensing in HVAC and process control. IC Role / Device Role / Timing Role: Auxiliary ADC monitors loop voltage; primary ADC reads sensor; excitation sources bias bridge; UART reports diagnostics. Use Value: Integrated IEXC1/IEXC2 current sources with ±1% matching and burnout detection reduce component count by 4+ discrete parts. |
| Portable Gas Analyzer | IEEE 1451.2 Smart Sensor Node |
|
Use Scenario: Battery-powered electrochemical gas sensor with temperature compensation and low-power sleep cycles. IC Role / Device Role / Timing Role: On-chip temperature sensor feeds ADC calibration; power-down mode draws only 20 µA while retaining crystal timing. Use Value: 3 mA active current at 3 V and 20 µA power-down current extend battery life to >1 year in 1-minute wake/sleep cycles. |
Use Scenario: Self-identifying transducer node compliant with IEEE 1451.2 TEDS standards for plug-and-play sensor integration. IC Role / Device Role / Timing Role: MCU stores and serves TEDS data from flash memory; UART/I²C interfaces deliver standardized sensor metadata to host. Use Value: Factory firmware supports TEDS read/write over serial interface-no custom bootloader development required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision sensor front-end applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUC7024BCPZ-RL | ARM7TDMI core (not 8051); higher clock (45 MHz); 12-bit SAR ADC (not sigma-delta); no on-chip excitation sources. | Better for high-speed control loops; unsuitable for ultra-low-noise DC measurements requiring 24-bit resolution. | Select ADUC7024BCPZ-RL only when migrating to ARM architecture and sacrificing sigma-delta noise performance for speed. |
| ADUC847BSZ-REEL | Same 8051 core and pinout; upgraded 24-bit primary ADC with improved PSR (120 dB vs. 113 dB) and lower offset drift (±5 nV/°C vs. ±10 nV/°C). | Drop-in replacement with enhanced metrology-grade stability; requires no layout change but benefits from updated calibration routines. | Choose ADUC847BSZ-REEL for new designs demanding tighter long-term accuracy in critical instrumentation. |
Compared with ADUC824BSZ-REEL, ADUC7024BCPZ-RL trades sigma-delta precision for ARM performance and lacks transducer-specific analog features, while ADUC847BSZ-REEL retains full compatibility and improves key metrology parameters-making it the preferred upgrade path for legacy ADUC824-based systems.
Availability
ADUC824BSZ-REEL is available at Aetrix Electronics and suitable for industrial instrumentation, portable test equipment, and smart sensor modules requiring stable component supply across extended product lifecycles.
Supply support for ADUC824BSZ-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADUC824BSZ-REEL belongs to the MicroConverter® family-designed specifically to integrate precision analog front-ends with embedded control for intelligent sensor and transducer applications.
FAQ
What is the maximum update rate of the primary ADC in ADUC824BSZ-REEL?
The primary ADC in ADUC824BSZ-REEL supports programmable conversion rates from 5.4 Hz to 105 Hz in 0.732 ms increments. At 20 Hz update rate, it delivers 18-bit peak-to-peak resolution with ±2.56 V input range-optimized for high-accuracy, low-frequency transducer signals like strain gauges and load cells.
Does ADUC824BSZ-REEL support external memory expansion?
Yes, ADUC824BSZ-REEL supports external program and data memory via its multiplexed Port 0 (address/data bus) and Port 2 (upper address bits), with hardware-controlled ALE and PSEN signals. Timing specifications for external memory read/write cycles are fully defined in the datasheet up to 12.58 MHz core clock.
Can ADUC824BSZ-REEL operate from a single 3.3 V supply?
Yes, ADUC824BSZ-REEL is specified for 3 V nominal operation with AVDD and DVDD independently configurable from 2.7 V to 3.6 V. It draws only 2.1 mA at 3 V and 1.57 MHz core clock, making it suitable for battery-powered portable instrumentation.
What serial interfaces does ADUC824BSZ-REEL provide?
ADUC824BSZ-REEL integrates three hardware serial interfaces: UART (for host communication and debug), SPI® (for fast peripheral interfacing), and I²C®-compatible (for multi-drop sensor networks). All are accessible via dedicated pins and supported by on-chip firmware for in-circuit programming.
Is the flash memory in ADUC824BSZ-REEL field-programmable?
Yes, the 8 KB flash program memory and 640 bytes flash data memory in ADUC824BSZ-REEL are field-programmable via UART using on-chip factory firmware. No external programmer is required-enabling remote firmware updates and sensor coefficient calibration in deployed systems.
ADUC824BSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 52-QFP
- Series:
- MicroConverter® ADuC8xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8052
- Core Size:
- 8-Bit
- Speed:
- 12.58MHz
- Connectivity:
- EBI/EMI, I2C, SPI, UART/USART
- Peripherals:
- POR, PSM, Temp Sensor, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 640 x 8
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.25V
- Data Converters:
- A/D 3x16b, 4x24b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ADUC824BSZ-REEL FAQ
1.How can I place an order for ADUC824BSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUC824BSZ-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADUC824BSZ-REEL reliable?
The price and inventory of ADUC824BSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUC824BSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADUC824BSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUC824BSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUC824BSZ-REEL?
ADUC824BSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUC824BSZ-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADUC824BSZ-REEL?
For technical support, including ADUC824BSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUC824BSZ-REEL requirements.
6.How does Aetrix verify that ADUC824BSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADUC824BSZ-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADUC824BSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADUC824BSZ-REEL?
All ADUC824BSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADUC824BSZ-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADUC824BSZ-REEL part is unused and in its original packaging.
Return procedure for ADUC824BSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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