My Inquiry
My Account
Analog Devices Inc. ADUCM331WDCPZ
- Part No.:
- ADUCM331WDCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADUCM331WDCPZ.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADUCM331WDCPZ from Analog Devices is an automotive-qualified, integrated precision battery sensor IC combining dual 20-bit Σ-Δ ADCs (IADC/VADC/TADC), ARM Cortex-M3 core (16.384 MHz, ±1% accuracy), 128 kB Flash/EE with ECC, LIN 2.2 transceiver, and on-chip LDOs - all in a single 32-lead LFCSP for direct 12 V battery monitoring in engine bay environments.
For engineers reviewing the ADUCM331WDCPZ datasheet, ADUCM331WDCPZ pinout, ADUCM331WDCPZ application, or ADUCM331WDCPZ equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and confirmed alternative parts - all grounded in Rev. C datasheet specifications and functional block diagram architecture.
Technical Context
The ADUCM331WDCPZ implements a dedicated analog acquisition subsystem with three independent 20-bit Σ-Δ ADC channels: current (IADC) with programmable PGA gain (4–512), voltage (VADC) with buffered 24:1 resistive attenuator for 6–18 V battery input, and temperature (TADC) supporting both on-die and external NTC/PTC sensors. All ADCs share a common ±5 ppm/°C internal 1.2 V reference and support simultaneous sampling at up to 8 kHz.
Its ARM Cortex-M3 processor executes firmware directly from ECC-protected Flash, interfaces via SPI and six GPIOs, and integrates automotive-grade peripherals including LIN physical layer (100 kbps compliant), watchdog timer, wake-up timer, and power-on reset - all operating across −40°C to +115°C with extended functionality to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 20-bit Σ-Δ for IADC, VADC, and TADC - enables sub-mV voltage and sub-μV current measurement resolution under automotive thermal stress. |
| Current Channel Input Range | −200 mV to +300 mV differential at IIN+/IIN− - supports high-side shunt sensing with full-scale range extension via gain calibration. |
| Battery Voltage Input Range | 6 V to 18 V at VBAT pin - accommodates cold-crank (≤6 V) and load-dump (≥18 V) transients without external protection. |
| On-Chip Memory | 128 kB Flash/EE (ECC), 6 kB SRAM (ECC), 4 kB Data Flash - sufficient for complex battery state-of-health (SoH) algorithms and long-term logging. |
| LIN Compliance | LIN 2.2 slave, SAE J2602-compliant, 100 kbps fast-download mode - enables direct integration into vehicle body control modules without external transceiver. |
| Operating Temperature | −40°C to +115°C, with functional specs extended to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood deployment. |
| Power Supply | Direct 3.6 V to 18 V operation on VDD pin - eliminates need for external DC/DC converter in 12 V battery systems. |
Pinout & Package
ADUCM331WDCPZ is housed in a 32-lead, 6 mm × 6 mm LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad - optimized for high-reliability automotive PCB mounting and thermal dissipation in confined engine compartment spaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 26) | Main Power Input | Accepts 3.6–18 V battery supply; powers internal LDOs generating AVDD18/DVDD18/DVDD33 rails - no external regulator required. |
| VBAT (Pin 27) | Battery Voltage Sense Input | High-impedance input to 24:1 resistive attenuator - enables direct 12 V battery monitoring with <±150 ppm FSR INL error. |
| IIN+ / IIN− (Pins 12/13) | Differential Current Sense Inputs | Buffered, fully differential inputs to 20-bit IADC with PGA - supports bidirectional shunt-based current measurement with gain programmability (4–512). |
| VTEMP (Pin 10) | External Temperature Sensor Interface | Connects to NTC/PTC thermistors; referenced to GND_SW (Pin 9) - enables accurate ambient or terminal temperature monitoring with ±1°C accuracy over −40°C to +115°C. |
| LIN (Pin 28) | LIN Bus Physical Interface | Integrated LIN transceiver output - drives standard LIN bus directly (no external driver needed); supports dominant/recessive states per ISO 17987-4. |
| GPIO0–GPIO5 (Pins 4–5, 6–8, 32) | Configurable Digital I/O | Six multifunction pins supporting SPI (CS/SCLK/MISO/MOSI), IRQ, LIN_RX/TX, LC_TX/RX - enables flexible system interfacing and diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous-sampling 20-bit Σ-Δ ADCs | Enables synchronized current/voltage/temperature acquisition for real-time battery impedance modeling and SoC estimation without time skew errors. |
| On-chip ±5 ppm/°C voltage reference | Stabilizes ADC accuracy across automotive temperature extremes - eliminates need for external precision reference and reduces BOM count. |
| Integrated LIN 2.2 transceiver | Reduces system cost and board space by removing discrete LIN PHY; supports fast-download programming and diagnostic messaging over single-wire bus. |
| Automotive-grade memory with ECC | 128 kB Flash/EE and 6 kB SRAM with error-correcting code - ensures firmware integrity and data reliability during EMI-rich engine start-stop cycles. |
| Low-power monitor mode (<100 μA) | Enables continuous battery health monitoring during vehicle sleep mode - extends parasitic draw budget while maintaining diagnostic readiness. |
Applications
| Battery State-of-Health Monitoring | Start-Stop System Control |
|---|---|
Use Scenario: Continuous monitoring of cranking voltage drop, charge acceptance, and internal resistance drift in 12 V lead-acid batteries over 5+ years of vehicle service life. IC Role / Device Role / Timing Role: ADUCM331WDCPZ acts as primary battery management unit - performing real-time ADC sampling, SoH algorithm execution, and LIN-based reporting to BCM. Use Value: Detects end-of-life battery degradation 6–12 months before failure, reducing roadside assistance incidents and warranty claims. |
Use Scenario: Managing engine restart timing and alternator load regulation during micro-hybrid stop-start cycles in urban driving conditions. IC Role / Device Role / Timing Role: ADUCM331WDCPZ serves as intelligent battery supervisor - measuring instantaneous current/voltage during cranking and adjusting restart thresholds dynamically. Use Value: Extends starter motor life by preventing restart attempts below minimum cranking voltage (e.g., <8.5 V), improving system reliability. |
| 12 V Battery Diagnostics Gateway | Industrial UPS Battery Management |
Use Scenario: Aggregating battery telemetry (voltage sag, current ripple, temperature gradient) for cloud-based fleet health analytics in commercial vehicles. IC Role / Device Role / Timing Role: ADUCM331WDCPZ functions as edge-node sensor - acquiring synchronized multi-parameter data and transmitting via LIN to gateway MCU for CAN upload. Use Value: Enables predictive maintenance scheduling based on statistical battery aging trends, reducing unplanned downtime. |
Use Scenario: Precision monitoring of backup lead-acid batteries in medical imaging equipment and telecom rectifier systems where runtime assurance is critical. IC Role / Device Role / Timing Role: ADUCM331WDCPZ operates as standalone battery monitor - executing self-calibrating ADC routines and storing historical discharge profiles in ECC-protected Data Flash. Use Value: Guarantees >99.9% uptime compliance by triggering failover before battery capacity falls below 70% SoC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUCM330WDCPZ | 96 kB Flash/EE (vs. 128 kB), identical ADC/peripheral spec - same package, pinout, and automotive qualification. | Lower firmware storage margin; suitable for simpler SoC-only algorithms without long-term logging. | Select when firmware size ≤96 kB and cost sensitivity outweighs future algorithm scalability needs. |
| MAX17205G+T | Dedicated fuel gauge IC with ModelGauge™ m5 algorithm; no MCU, no LIN, 14-bit ADC only; 24-pin TQFN. | Optimized for portable Li-ion SoC estimation - lacks automotive temp range, battery voltage/current measurement range, and LIN interface. | Choose only for non-automotive, low-voltage (≤4.5 V) Li-ion applications requiring embedded fuel gauging, not full battery health analysis. |
Compared with ADUCM331WDCPZ, ADUCM330WDCPZ offers identical analog performance and automotive robustness but reduced firmware headroom, while MAX17205G+T targets fundamentally different chemistries and system architectures - neither provides drop-in replacement capability for 12 V automotive battery monitoring.
Availability
ADUCM331WDCPZ is available at Aetrix Electronics and suitable for automotive battery management systems, start-stop control units, and industrial UPS monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADUCM331WDCPZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets with precision sensing and control solutions.
The ADUCM331WDCPZ belongs to Analog Devices' automotive-qualified precision battery sensor product line - designed specifically to replace discrete ADC/microcontroller/LIN transceiver combinations in 12 V battery monitoring applications.
FAQ
What is the maximum battery voltage the ADUCM331WDCPZ can measure directly?
The ADUCM331WDCPZ measures battery voltage directly via its VBAT pin with a specified input range of 6 V to 18 V, supported by an on-chip 24:1 resistive attenuator. It tolerates transient overvoltages up to 40 V (per Absolute Maximum Ratings), making it suitable for automotive load-dump conditions without external clamping circuitry. This capability is intrinsic to the ADUCM331WDCPZ design and validated across −40°C to +125°C.
Does the ADUCM331WDCPZ require an external crystal oscillator?
No, the ADUCM331WDCPZ uses an integrated 16.384 MHz high-frequency oscillator with ±1% accuracy in high-precision mode - eliminating the need for an external crystal. It also includes a 32.768 kHz low-frequency oscillator for low-power timing. Both oscillators are factory-trimmed and fully characterized across temperature, enabling reliable operation of the ADUCM331WDCPZ in automotive environments without additional timing components.
How does the ADUCM331WDCPZ handle current measurement accuracy across temperature?
Current measurement accuracy in the ADUCM331WDCPZ is maintained via a combination of on-chip ±5 ppm/°C voltage reference, programmable gain amplifier with ±0.1% gain mismatch, and offset/gain calibration registers. The datasheet specifies offset error drift of ±0.48 LSB/°C (chop off) and total gain error drift of ±3 ppm/°C - enabling stable sub-100 μV current sensing accuracy from −40°C to +115°C without external compensation. This behavior is measured and guaranteed for the ADUCM331WDCPZ.
Can the ADUCM331WDCPZ operate without a LIN bus connection?
Yes, the ADUCM331WDCPZ functions fully as a standalone battery sensor without LIN communication - its ADCs, MCU, timers, and GPIOs remain operational. The LIN transceiver is optional and disabled by default; the device supports SPI and SWD for programming and data readout. LIN is enabled only when configured in firmware, allowing flexible deployment in non-LIN systems while retaining the ADUCM331WDCPZ's full analog acquisition capability.
What is the flash endurance specification for the ADUCM331WDCPZ?
The ADUCM331WDCPZ guarantees 10,000 write/erase cycles for its 128 kB Flash/EE memory and 4 kB Data Flash - qualified per JEDEC Standard 22 Method A117 at −40°C, +25°C, and +115°C. Data retention is rated for 20 years at junction temperature (TJ) = 85°C, with derating applied at higher temperatures. These specifications apply specifically to the ADUCM331WDCPZ silicon revision L6x and are documented in Rev. C datasheet Table 1.
ADUCM331WDCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 16.384Mhz
- Connectivity:
- LINbus, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 6
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 3.6V ~ 18V
- Data Converters:
- A/D 2x20b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 115°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ADUCM331WDCPZ FAQ
1.How can I place an order for ADUCM331WDCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUCM331WDCPZ 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 ADUCM331WDCPZ reliable?
The price and inventory of ADUCM331WDCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUCM331WDCPZ is usually 5 days.
3.What payment methods are accepted for ADUCM331WDCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUCM331WDCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUCM331WDCPZ?
ADUCM331WDCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUCM331WDCPZ 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 ADUCM331WDCPZ?
For technical support, including ADUCM331WDCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUCM331WDCPZ requirements.
6.How does Aetrix verify that ADUCM331WDCPZ is sourced from the original manufacturer or authorized distributors?
All ADUCM331WDCPZ 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 ADUCM331WDCPZ meets industry standards.
7.What is the process for return or replacement of ADUCM331WDCPZ?
All ADUCM331WDCPZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUCM331WDCPZ, 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 ADUCM331WDCPZ part is unused and in its original packaging.
Return procedure for ADUCM331WDCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUCM331WDCPZ 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…
