My Inquiry
My Account
Analog Devices Inc. ADUC834BCPZ-REEL
- Part No.:
- ADUC834BCPZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Microcontrollers
- Package:
- 56-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADUC834BCPZ-REEL.pdf
- Description:
- IC MCU 8BIT 62KB FLASH 56LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADUC834BCPZ-REEL from Analog Devices is a fully integrated MicroConverter® smart transducer front end combining dual high-resolution ADCs (24-bit primary and 16-bit auxiliary), an 8052-compatible 8-bit MCU core, 62 kB Flash/EE program memory, 4 kB Flash/EE data memory, and on-chip peripherals including dual 16-bit DACs/PWMs, temperature sensor, excitation current sources, and UART/SPI/I²C interfaces. It targets precision low-frequency measurement in weigh scales, strain-gage systems, and 4–20 mA transmitters.
For engineers reviewing the ADUC834BCPZ-REEL datasheet, ADUC834BCPZ-REEL pinout, ADUC834BCPZ-REEL application, or ADUC834BCPZ-REEL equivalent, key selection considerations include its dual-ADC architecture with programmable gain amplifier, 20 Hz update rate delivering 18.5-bit peak-to-peak resolution, internal 1.25 V ±1% reference, and operation across –40°C to +85°C in the 56-lead LFCSP package.
Technical Context
The ADUC834BCPZ-REEL integrates two independent sigma-delta ADCs: a 24-bit primary ADC with no missing codes at 20 Hz and 21-bit rms effective resolution, and a 16-bit auxiliary ADC supporting unipolar/bipolar inputs up to ±2.5 V. Both feature on-chip digital filtering, programmable output data rates, and dedicated PGA for direct low-level signal conditioning.
Its 8052-based MCU core runs from a 32.768 kHz crystal with on-chip PLL generating up to 12.58 MHz clock, routed through a programmable divider to set the core frequency. Memory includes 62 kB Flash/EE program space, 4 kB Flash/EE data space, and 2304 bytes RAM - configurable to support up to 60 kB NV data logging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Primary ADC Resolution | 24-bit with no missing codes at 20 Hz update rate - ensures full dynamic range capture without code gaps in precision weighing applications. |
| Auxiliary ADC Resolution | 16-bit unipolar/bipolar input - supports secondary sensor monitoring or control feedback with deterministic quantization. |
| Effective Resolution (p-p) | 18.5-bit at 20 Hz, ±2.56 V range - enables sub-10 µV sensitivity for strain-gage bridge measurements. |
| Internal Reference Voltage | 1.25 V ±1% initial tolerance - provides stable ADC reference without external components, reducing BOM count. |
| Power Consumption (Normal) | 2.3 mA max @ 3.6 V, core clock = 1.57 MHz - enables battery-powered portable instrumentation with multi-year runtime. |
| Flash Endurance & Retention | 100 Kcycles endurance, 100-year data retention - suitable for field-updatable firmware in industrial data loggers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and process control cabinets. |
Pinout & Package
ADUC834BCPZ-REEL is packaged in a 56-lead LFCSP (8 mm × 8 mm) with exposed thermal pad soldered to DGND. This package supports higher thermal performance (θJA = 52°C/W) than the MQFP variant and is rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.2 / IEXC1 | Excitation Current Source Output | Provides programmable –200 µA current for RTD or bridge sensor biasing; matched to P1.3 within ±1% at 25°C. |
| P1.3 / IEXC2 | Excitation Current Source Output | Second matched –200 µA current source; enables 4-wire RTD measurement with common-mode rejection. |
| P1.4–P1.7 / AIN1–AIN4 | Analog Input Channels | Dedicated differential inputs to primary ADC; support PGA gain up to 128× for microvolt-level signals. |
| P1.0 / T2 / PWM0 | Timer 2 Input / PWM Output | Configurable as external clock input for Timer 2 or 16-bit PWM output for analog control loop actuation. |
| REFIN+ / REFIN− | External Reference Inputs | Accept 1 V to AVDD differential reference; internal detection triggers NOXREF flag if voltage drops below 0.3 V. |
| DVDD / AVDD | Digital / Analog Power Supplies | Independent 2.7–3.6 V or 4.75–5.25 V supplies allow noise isolation between digital logic and precision analog circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent Sigma-Delta ADCs | Primary 24-bit ADC (20 Hz, 18.5-bit p-p) and auxiliary 16-bit ADC operate simultaneously with separate MUX and PGA paths - eliminates time-multiplexed sampling errors in multi-sensor systems. |
| On-Chip Programmable Gain Amplifier | Configurable gain of 1× to 128× on primary ADC inputs - enables direct connection of mV-range transducer outputs without external op-amps. |
| Integrated Excitation Current Sources | Two matched –200 µA current sources with <±1% matching and <200 ppm/°C drift - supports accurate 3-/4-wire RTD measurement without calibration overhead. |
| Self-Contained Calibration System | Factory-calibrated zero-scale and full-scale offsets; user-accessible calibration registers allow system-level correction of sensor nonlinearity and gain drift. |
| Low-Power Operation Modes | Power-down mode draws ≤20 µA with wake-up timer active - extends battery life in remote sensor nodes while maintaining real-time event responsiveness. |
Applications
| Weigh Scale Front End | Strain-Gage Instrumentation |
|---|---|
Use Scenario: High-precision digital weighing system measuring load cells with ±0.001% full-scale accuracy over temperature. IC Role / Device Role / Timing Role: Primary ADC digitizes mV-level bridge output; PGA configures 64× gain; internal 1.25 V reference ensures stable LSB size. Use Value: 18.5-bit p-p resolution at 20 Hz enables 1:262,144 dynamic range - sufficient for Class III legal-for-trade metrology compliance. |
Use Scenario: Portable handheld strain analyzer for structural health monitoring with battery operation. IC Role / Device Role / Timing Role: Auxiliary ADC monitors temperature compensation sensor; primary ADC samples conditioned gage signal; dual DACs generate excitation and offset correction. Use Value: Integrated 200 µA excitation sources and PGA eliminate external bias circuitry, reducing PCB area by >30% versus discrete solutions. |
| 4–20 mA Smart Transmitter | Data Logger with Sensor Fusion |
Use Scenario: Loop-powered field transmitter converting pressure/temperature inputs to HART-enabled 4–20 mA output. IC Role / Device Role / Timing Role: Primary ADC acquires sensor data; UART handles HART communication; dual PWMs drive current loop via external transistor. Use Value: On-chip power supply monitor (PSM) detects brownout conditions and triggers safe shutdown before loop integrity loss. |
Use Scenario: Industrial environmental logger recording temperature, humidity, and vibration over months on single Li-ion cell. IC Role / Device Role / Timing Role: MCU executes sleep/wake cycles; RTC timer wakes device every 10 s; primary ADC captures temp sensor; auxiliary ADC reads analog humidity output. Use Value: 2.3 mA normal mode current + 20 µA power-down current enables >5-year battery life at 10 s sampling interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart transducer front-end applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUC847BCPZ-REEL | Higher-resolution 24-bit primary ADC (22-bit rms), 128 kB Flash, added 12-bit SAR ADC channel, same LFCSP-56 package. | Supports faster sampling (up to 1 MSPS SAR) alongside sigma-delta; better suited for mixed-signal acquisition with transient events. | Select when needing simultaneous high-speed and high-resolution sampling - ADUC834BCPZ-REEL remains optimal for pure low-frequency precision. |
| ADUCM360BCPZ-RL7 | ARM Cortex-M3 core, 24-bit dual ΣΔ ADCs, 128 kB Flash, integrated 4 mA current loop driver, SPI/I²C/UART. | Native support for 4–20 mA loop power and HART modulation; higher compute throughput for on-device analytics. | Choose for new designs requiring embedded processing and loop-powered operation - ADUC834BCPZ-REEL offers lower cost and proven legacy toolchain support. |
Compared with ADUC847BCPZ-REEL and ADUCM360BCPZ-RL7, the ADUC834BCPZ-REEL delivers optimal cost-performance balance for fixed-function, ultra-low-power transducer interfacing where 8051 compatibility and minimal external components are prioritized over raw processing headroom or loop-driver integration.
Availability
ADUC834BCPZ-REEL is available at Aetrix Electronics and suitable for weigh scale manufacturing, portable instrumentation development, and 4–20 mA transmitter design requiring stable component supply and long-term industrial availability.
Supply support for ADUC834BCPZ-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, with design centers worldwide and a 50+ year heritage in precision measurement technology.
The ADuC834 belongs to Analog Devices' MicroConverter® family - engineered specifically for intelligent sensor front ends where integration of high-resolution ADCs, flash-based MCU, and analog peripherals reduces system complexity in industrial and instrumentation applications.
FAQ
What is the maximum update rate of the primary ADC in ADUC834BCPZ-REEL?
The primary ADC in ADUC834BCPZ-REEL supports a programmable update rate from 5.4 Hz to 105 Hz in 0.732 ms increments. At the highest rate (105 Hz), effective resolution decreases; the 18.5-bit peak-to-peak specification applies at 20 Hz - the optimal trade-off between noise performance and throughput for precision weighing and strain-gage applications. The ADUC834BCPZ-REEL's digital filter configuration determines exact timing behavior.
Does ADUC834BCPZ-REEL support external reference voltage for the primary ADC?
Yes, ADUC834BCPZ-REEL accepts an external differential reference voltage applied to REFIN+ and REFIN− pins, ranging from 1 V to AVDD. The device includes reference detect circuitry that sets the NOXREF flag when VREF falls below 0.3 V, enabling firmware-driven fault response. Internal 1.25 V reference remains available and can be selected independently per ADC via XREF0/XREF1 bits in ADC0CON/ADC1CON.
How many analog input channels does ADUC834BCPZ-REEL provide for the primary ADC?
ADUC834BCPZ-REEL provides five dedicated analog input channels (AIN1–AIN5) for the primary ADC, accessible via internal multiplexer. AIN1–AIN4 are routed to P1.4–P1.7 respectively; AIN5 connects to P1.3, which also serves as IEXC2. All inputs support differential or pseudo-differential configurations with programmable gain up to 128×, and absolute voltage limits of AGND + 100 mV to AVDD – 100 mV.
Can ADUC834BCPZ-REEL operate from a single 3.3 V supply?
Yes, ADUC834BCPZ-REEL supports independent 3 V nominal operation: AVDD and DVDD may each be supplied from 2.7 V to 3.6 V. In this configuration, typical DVDD current is 2.3 mA max at 1.57 MHz core clock, and AVDD current remains ≤180 µA. The internal band gap reference and ADC/DAC performance remain fully specified across this range, making ADUC834BCPZ-REEL suitable for battery-powered 3.3 V systems.
What debug and programming interfaces are supported by ADUC834BCPZ-REEL?
ADUC834BCPZ-REEL supports in-circuit serial download via UART (no external hardware required), high-speed user download (~5 seconds), and single-pin emulation mode using the EA pin. Factory firmware enables debugging without JTAG; the UART interface handles both firmware loading and real-time variable inspection. The ADUC834BCPZ-REEL is fully supported by Analog Devices' QuickStart™ development system, including low-cost hardware adapters and Keil C51 toolchain integration.
ADUC834BCPZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 56-VFQFN Exposed Pad, CSP
- 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, PWM, Temp Sensor, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 62KB (62K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 2.25K 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:
ADUC834BCPZ-REEL FAQ
1.How can I place an order for ADUC834BCPZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUC834BCPZ-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 ADUC834BCPZ-REEL reliable?
The price and inventory of ADUC834BCPZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUC834BCPZ-REEL is usually 5 days.
3.What payment methods are accepted for ADUC834BCPZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUC834BCPZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUC834BCPZ-REEL?
ADUC834BCPZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUC834BCPZ-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 ADUC834BCPZ-REEL?
For technical support, including ADUC834BCPZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUC834BCPZ-REEL requirements.
6.How does Aetrix verify that ADUC834BCPZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADUC834BCPZ-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 ADUC834BCPZ-REEL meets industry standards.
7.What is the process for return or replacement of ADUC834BCPZ-REEL?
All ADUC834BCPZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADUC834BCPZ-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 ADUC834BCPZ-REEL part is unused and in its original packaging.
Return procedure for ADUC834BCPZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUC834BCPZ-REEL Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
