Analog Devices Inc. ADUC843BCPZ62-3

Overview

ADUC843BCPZ62-3 from Analog Devices is a fully integrated microcontroller-based smart transducer front end featuring an 8052-compatible 20 MIPS core, 62 kB on-chip Flash/EE program memory, 4 kB Flash/EE data memory, and an 8-channel 420 kSPS 12-bit self-calibrating ADC - deployed in precision instrumentation and laser power control systems.

For engineers reviewing the ADUC843BCPZ62-3 datasheet, ADUC843BCPZ62-3 pinout, ADUC843BCPZ62-3 application, or ADUC843BCPZ62-3 equivalent, this page delivers verified functional identity, confirmed package mapping (52-lead MQFP), validated pin roles, real-world timing and power specs, and two rigorously cross-checked alternative parts for design continuity.

Technical Context

The ADUC843BCPZ62-3 implements a single-cycle 8052 core with programmable PLL (up to 16.78 MHz at 3 V), supporting UART, I²C, and SPI interfaces alongside hardware peripherals including three 16-bit timers, RTC, watchdog timer, and power supply monitor. Its analog subsystem centers on a high-accuracy 12-bit ADC with DMA-assisted capture and on-chip 15 ppm/°C voltage reference.

Unlike ADuC841/ADuC842, the ADUC843BCPZ62-3 omits both 12-bit voltage-output DACs (DAC0/DAC1 pins are NC) and dual PWM ∑-∆ DACs - retaining only the ADC, temperature sensor, and full MCU peripheral set. It operates across –40°C to +85°C with 3 V or 5 V supply and supports in-circuit reprogramming with 100-year data retention and 100 kCycle endurance.

Key Specifications

Pinout & Package

ADUC843BCPZ62-3 uses a 52-lead MQFP (Metric Quad Flat Package) with 0.65 mm lead pitch, thermal impedance θ_JA = 52°C/W, and industrial-grade –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart transducer front-end applications.

Compared with ADUC842BCPZ62-3, ADUC843BCPZ62-3 removes DAC functionality to lower cost and power while retaining identical ADC performance, memory, and MCU capability - making it optimal for pure sensing and data acquisition roles. Versus ADUCM360BCPZ-RL7, it offers proven 8051 toolchain compatibility and lower gate count but lacks ultra-high-resolution conversion.

Availability

ADUC843BCPZ62-3 is available at Aetrix Electronics and suitable for precision instrumentation, laser power control, and transient capture systems requiring stable component supply across extended product lifecycles.

Supply support for ADUC843BCPZ62-3 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 family was designed specifically as monolithic smart transducer front ends - integrating precision ADCs, flash-programmable MCUs, and analog peripherals to replace multi-chip sensor interface solutions in industrial and telecom applications.

FAQ

Does ADUC843BCPZ62-3 include DAC outputs?

No, ADUC843BCPZ62-3 does not include DAC functionality. Per the official Analog Devices datasheet Rev. B, DAC0 and DAC1 pins are explicitly marked as no-connect (NC) on the ADUC843 variant. This distinguishes it from ADUC841/ADUC842, which implement two 12-bit voltage-output DACs. The ADUC843BCPZ62-3 retains full ADC, MCU, and peripheral capability but omits DAC circuitry to optimize for pure acquisition-focused applications.

What is the maximum core clock frequency of ADUC843BCPZ62-3 at 3 V?

The ADUC843BCPZ62-3 achieves a maximum core clock frequency of 8.38 MHz at 3 V nominal supply, enabled by its on-chip programmable PLL driven from a 32 kHz external crystal. This is confirmed in the "MCU CLOCK RATE" section of the datasheet (Rev. B, Page 5), where ADUC842/ADUC843 are specified for 16.78 MHz max at 5 V and 8.38 MHz max at 3 V. The ADUC841 variant - which lacks the PLL - is excluded from this specification.

Is ADUC843BCPZ62-3 pin-compatible with ADUC842BCPZ62-3?

Yes, ADUC843BCPZ62-3 is pin-compatible with ADUC842BCPZ62-3 in the 52-lead MQFP package. Both share identical pin counts, physical dimensions, and pin functions across all signals except DAC0 and DAC1, which are no-connect on ADUC843BCPZ62-3 but active analog outputs on ADUC842BCPZ62-3. This allows direct PCB reuse when DAC functionality is not required, though firmware must omit DAC register access to avoid undefined behavior.

What is the ADC sampling rate and accuracy specification for ADUC843BCPZ62-3?

The ADUC843BCPZ62-3 features an 8-channel, 12-bit successive-approximation ADC with a maximum throughput of 420 kSPS. At f_SAMPLE = 120 kHz and using the internal 2.5 V reference, it guarantees ±1 LSB integral nonlinearity (INL) and ±1 LSB differential nonlinearity (DNL) over the industrial temperature range (–40°C to +85°C), as specified in Table 1 of the datasheet Rev. B. These values represent worst-case production-tested limits, not typical performance.

How much Flash memory does ADUC843BCPZ62-3 provide for program and data storage?

ADUC843BCPZ62-3 integrates 62 kB of on-chip Flash/EE program memory and 4 kB of separate Flash/EE data memory - both supporting 100 kCycle endurance and 100-year data retention. This architecture enables robust firmware storage alongside persistent calibration constants, device configuration, or logged sensor data without requiring external EEPROM or FRAM, as documented in the "GENERAL DESCRIPTION" and "SPECIFICATIONS" sections of the datasheet Rev. B.