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Analog Devices Inc. ADUC845BCPZ8-5
- Part No.:
- ADUC845BCPZ8-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Microcontrollers
- Package:
- 56-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADUC845BCPZ8-5.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 56LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
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Product details
Overview
ADUC845BCPZ8-5 from Analog Devices is a MicroConverter® multichannel 24-/16-bit ADC with embedded 62 kB Flash MCU, featuring dual independent 24-bit Σ-Δ ADCs, on-chip temperature sensor, dual 16-bit Σ-Δ DACs, and 12-bit voltage-output DAC. It operates at 1.57 MHz core speed, supports 3 V/5 V supply, and targets high-precision sensor monitoring in industrial instrumentation and portable battery-powered systems.
For engineers reviewing the ADUC845BCPZ8-5 datasheet, ADUC845BCPZ8-5 pinout, ADUC845BCPZ8-5 application, or ADUC845BCPZ8-5 equivalent, key selection considerations include dual 24-bit ADC resolution with ≤10 nV/°C offset drift, 62 kB Flash/EE program memory with 100-year retention, 24 programmable I/O lines, and −40°C to +85°C operation in 56-lead LFCSP package.
Technical Context
The ADUC845BCPZ8-5 integrates an 8051-compatible single-cycle MCU core with two independent Σ-Δ ADC subsystems: primary 24-bit ADC (5.4–1365 Hz update rate, 24-bit no-missing-codes) and auxiliary 24-bit ADC (ADuC845-specific). Both support chop mode for ultra-low drift (±10 nV/°C), programmable gain amplifier, and bipolar/unipolar input configuration.
On-chip peripherals include dual excitation current sources (200 μA each, ±1% matching), UART/SPI/I²C interfaces, 3×16-bit timers, watchdog timer, power supply monitor with four selectable trip points, and time interval counter for RTC/wake-up. The PLL enables core clock up to 12.58 MHz from 32.768 kHz crystal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Dual 24-bit Σ-Δ ADCs with no missing codes up to 24 bits; effective resolution 22-bit rms (19.5 bit p-p) |
| Core Architecture | Single-cycle 8051-compatible MCU with 62 kB Flash/EE program memory and 4 kB Flash/EE data memory |
| Temperature Sensor | On-chip sensor with ±2°C accuracy - enables self-calibration and environmental compensation without external components |
| Power Consumption | 4.8 mA max at 3.6 V (core CLK = 1.57 MHz); 20 μA max in power-down with wake-up timer active |
| Reference Stability | Internal 1.25 V ADC reference with ±1% initial tolerance and 100 ppm/°C tempco; 2.5 V DAC reference with ±1% tolerance |
| DAC Outputs | 12-bit voltage-output DAC (0–VREF or 0–AVDD) plus dual 16-bit Σ-Δ DACs for precision analog control |
| Package & Temp Range | 56-lead LFCSP (8 mm × 8 mm), rated for −40°C to +85°C - suitable for compact industrial and portable designs |
Pinout & Package
ADUC845BCPZ8-5 is housed in a 56-lead LFCSP (8 mm × 8 mm) package with exposed thermal pad. Pin functions are defined per Analog Devices Rev. D datasheet Figure 11 (Pin Configurations) and Table 5 (Pin Function Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN10 / AINCOM | Analog Input Channels | 10-channel differential analog inputs supporting both primary and auxiliary ADCs; buffer-enabled for low leakage (±1 nA @ 85°C) |
| IEXC1 / IEXC2 | Excitation Current Sources | Matched 200 μA current sources (±1% at 25°C, ±20 ppm/°C drift) for RTD/bridge sensor biasing |
| XTAL1 / XTAL2 | Clock Inputs | Supports 32.768 kHz crystal oscillator; internal PLL generates up to 12.58 MHz system clock |
| DAC0 / DAC1 / DAC2 | DAC Output Terminals | Three independent analog outputs: 12-bit voltage DAC and dual 16-bit Σ-Δ DACs for multi-loop control |
| TEMP | Temperature Sensor Output | Internal die temperature measurement node - used for calibration and thermal derating in precision applications |
| RESET / PSEN / EA | MCU Control Signals | Active-low reset, program store enable, and external access control - enable in-system programming and secure boot |
Key Features
| Feature | Design Value |
|---|---|
| Dual 24-bit Σ-Δ ADCs | Independent primary and auxiliary converters with 24-bit no-missing-codes, enabling simultaneous high-resolution sensor acquisition |
| Chop-stabilized front-end | Offset drift reduced to ±10 nV/°C - critical for long-term stability in weigh scales and environmental monitors |
| Integrated transducer support | Dual 200 μA excitation sources + burnout detection - eliminates need for external current sources in bridge/RTD circuits |
| Secure Flash memory | 62 kB program + 4 kB data Flash/EE with 3-level security, 100 kcycle endurance, and 100-year data retention |
| Low-power operation | 20 μA power-down current with RTC wake-up - extends battery life in portable instrumentation and data loggers |
| Multi-protocol serial I/O | Hardware UART, SPI, and I²C interfaces - simplifies connectivity to host processors, displays, and wireless modules |
Applications
| Weigh Scale Systems | Industrial Pressure Monitoring |
|---|---|
|
Use Scenario: High-accuracy digital weighing systems requiring sub-gram resolution under varying ambient temperatures. IC Role / Device Role / Timing Role: Primary ADC digitizes load cell mV output; auxiliary ADC monitors temperature for real-time gain/offset compensation; on-chip 200 μA sources excite full-bridge sensors. Use Value: Dual 24-bit ADCs with ≤10 nV/°C drift eliminate external calibration hardware; integrated temperature sensor enables closed-loop compensation without extra ICs. |
Use Scenario: Remote pressure transmitters in oil/gas or HVAC systems operating on 3.3 V batteries for >5 years. IC Role / Device Role / Timing Role: ADC acquires amplified pressure sensor output; DAC drives 4–20 mA loop via external op-amp; RTC timer schedules periodic wake-up for data transmission. Use Value: 20 μA power-down current with wake-up timer extends battery life; dual DACs support both analog output and internal feedback control. |
| Portable Environmental Data Logger | Battery-Powered Temperature Controller |
|
Use Scenario: Handheld device logging temperature, humidity, and CO₂ using multiple analog sensors over 24-hour cycles. IC Role / Device Role / Timing Role: Primary ADC reads thermistor/hygrometer; auxiliary ADC monitors internal die temperature; Flash stores calibrated coefficients and logged data. Use Value: On-chip 62 kB Flash stores firmware + calibration tables; 24-bit resolution captures subtle environmental trends without oversampling. |
Use Scenario: Compact thermostat controlling heating/cooling based on local sensor readings and setpoint adjustments via I²C interface. IC Role / Device Role / Timing Role: ADC measures NTC thermistor; 12-bit DAC sets reference voltage for comparator-based control; UART enables configuration via PC. Use Value: Integrated 12-bit DAC replaces external DAC + op-amp; 24 programmable I/O lines support pushbuttons, LEDs, and relay drivers in single-chip design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUC847BCPZ-5 | Single 24-bit ADC (no auxiliary ADC), no on-chip temperature sensor, same 62 kB Flash and MCU core | Lacks dual-ADC capability and temperature sensing - unsuitable for simultaneous multi-sensor or self-compensating designs | Select when only one high-resolution ADC channel is required and cost reduction is prioritized over feature density |
| ADUCM360BCPZ-RL7 | ARM Cortex-M3 core, dual 24-bit Σ-Δ ADCs, 128 kB Flash, but no integrated temperature sensor or excitation sources | Higher performance MCU and memory, but requires external current sources and thermal sensing circuitry | Choose for applications needing ARM ecosystem support and higher processing throughput, accepting added BOM complexity |
Compared with ADUC845BCPZ8-5, ADUC847BCPZ-5 reduces integration by removing auxiliary ADC and temperature sensor, while ADUCM360BCPZ-RL7 upgrades compute capability but shifts transducer interface burden to external components - making ADUC845BCPZ8-5 optimal for compact, self-contained precision sensor nodes.
Availability
ADUC845BCPZ8-5 is available at Aetrix Electronics and suitable for industrial instrumentation, portable data loggers, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADUC845BCPZ8-5 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 ADuC8xx MicroConverter® family was designed specifically for precision sensor signal conditioning and embedded control - integrating high-resolution ADCs, Flash MCU, and analog peripherals in a single chip for industrial and instrumentation applications.
FAQ
What is the maximum ADC update rate for ADUC845BCPZ8-5 with chop enabled?
The ADUC845BCPZ8-5 supports a maximum primary ADC update rate of 105 Hz when chop mode is enabled (ADCMODE.3 = 0), delivering 24-bit no-missing-codes performance with ±10 nV/°C offset drift. This rate ensures optimal noise rejection for slow-varying signals like strain gauges and thermistors in precision measurement systems.
Does ADUC845BCPZ8-5 support external reference voltages for its ADCs?
Yes, ADUC845BCPZ8-5 accepts external references on REFIN(+) and REFIN(–) pins, supporting 1 V to AVDD range (up to 5.25 V). It also features internal 1.25 V ±1% reference with 100 ppm/°C tempco. External reference selection is controlled via XREF0/XREF1 bits in ADC0CON2 register.
How many I/O lines does ADUC845BCPZ8-5 provide, and what are their capabilities?
ADUC845BCPZ8-5 provides 24 programmable digital I/O lines across Ports 0–3, plus 8 additional analog/digital input-capable pins (AIN1–AIN10, AINCOM). All digital I/Os support TTL/CMOS levels, with Port 0 offering open-drain capability and Ports 1–3 featuring internal pull-ups - enabling flexible interface to sensors, displays, and actuators.
Can ADUC845BCPZ8-5 operate from a 3.3 V supply, and what are the implications for power consumption?
Yes, ADUC845BCPZ8-5 is fully specified for 2.7 V to 3.6 V DVDD/AVDD operation. At 3.6 V and 1.57 MHz core clock, typical DVDD current is 4.8 mA in normal mode and 20 μA in power-down mode - making it ideal for battery-powered applications where low quiescent current and wide supply tolerance are essential.
What communication interfaces are integrated into ADUC845BCPZ8-5?
ADUC845BCPZ8-5 integrates UART, SPI, and I²C serial interfaces - all implemented in hardware with dedicated peripheral registers. The UART includes a high-speed baud rate generator supporting up to 115,200 bps, while SPI and I²C support master/slave modes for connecting to EEPROMs, displays, and sensor hubs without software bit-banging overhead.
ADUC845BCPZ8-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 56-VFQFN Exposed Pad, CSP
- Series:
- MicroConverter® ADuC8xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8052
- Core Size:
- 8-Bit
- Speed:
- 12.58MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- POR, PSM, PWM, Temp Sensor, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 2.25K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.75V ~ 5.25V
- Data Converters:
- A/D 10x24b; D/A 1x12b, 2x16b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ADUC845BCPZ8-5 FAQ
1.How can I place an order for ADUC845BCPZ8-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUC845BCPZ8-5 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 ADUC845BCPZ8-5 reliable?
The price and inventory of ADUC845BCPZ8-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUC845BCPZ8-5 is usually 5 days.
3.What payment methods are accepted for ADUC845BCPZ8-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUC845BCPZ8-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUC845BCPZ8-5?
ADUC845BCPZ8-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUC845BCPZ8-5 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 ADUC845BCPZ8-5?
For technical support, including ADUC845BCPZ8-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUC845BCPZ8-5 requirements.
6.How does Aetrix verify that ADUC845BCPZ8-5 is sourced from the original manufacturer or authorized distributors?
All ADUC845BCPZ8-5 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 ADUC845BCPZ8-5 meets industry standards.
7.What is the process for return or replacement of ADUC845BCPZ8-5?
All ADUC845BCPZ8-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADUC845BCPZ8-5, 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 ADUC845BCPZ8-5 part is unused and in its original packaging.
Return procedure for ADUC845BCPZ8-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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