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Home > Products > Integrated Circuits (ICs) > Interface > Sensor and Detector Interfaces

Analog Devices Inc. ADUC7033BCPZ-8L

Name: ADUC7033BCPZ-8L
Brand: Analog Devices Inc.
SKU: ADUC7033BCPZ-8L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADUC7033BCPZ-8L

Manufacturer:: Analog Devices Inc.

Category:: Sensor and Detector Interfaces

Package:: 48-WFQFN Exposed Pad, CSP

Datasheet:: ADUC7033BCPZ-8L.pdf

Description:: IC MCU FLASH 96K ANLG I/O 48LFCS

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Product details

Overview

ADUC7033BCPZ-8L from Analog Devices is a fully integrated, automotive-grade precision battery sensor MCU combining dual 16-bit Σ-Δ ADCs (current and voltage/temperature channels), ARM7TDMI core (up to 20.48 MHz), 96 kB Flash/6 kB SRAM, LIN 2.0 slave interface, and direct 12 V battery operation - deployed in battery monitoring units for 12 V lead-acid and Li-ion starter batteries in engine control and body electronics.

For engineers reviewing the ADUC7033BCPZ-8L datasheet, ADUC7033BCPZ-8L pinout, ADUC7033BCPZ-8L application, or ADUC7033BCPZ-8L equivalent, key selection criteria include simultaneous dual-channel ADC sampling at ≤8 kHz, on-chip 5 ppm/°C reference stability, −40°C to +115°C operation, LIN-compliant UART with hardware sync, and low-power monitor mode consuming 300–700 μA during continuous ADC conversion.

Technical Context

The ADUC7033BCPZ-8L integrates two independent 16-bit Σ-Δ ADCs: one current channel with programmable PGA gain (1–512) and ±200 mV to +300 mV differential input range, and one voltage/temperature channel with on-chip 24× resistive attenuator enabling direct 12 V battery sensing. Both support chop mode for offset drift reduction and digital comparators with accumulator functionality.

Its ARM7TDMI core runs from a 20.48 MHz PLL clock (programmable divider), sourced by either an on-chip precision oscillator (131.072 kHz, ±1%), low-power oscillator (±3%), or external 32.768 kHz crystal. Power management includes normal mode (10 mA @ 10 MHz), low-power monitor mode (300–700 μA), and power-down states with wake-up via LIN, WU pin, or timers.

Key Specifications

Parameter	Value and Actual Design Meaning
ADC Resolution	16-bit simultaneous sampling across current, voltage, and temperature channels - enables high-accuracy battery state-of-charge (SoC) and state-of-health (SoH) estimation without external signal conditioning.
ADC Throughput	Programmable from 1 Hz to 8 kHz - supports both slow thermal profiling (1 Hz) and fast transient detection (8 kHz) in battery diagnostics.
Reference Stability	On-chip 1.2 V reference with ±5 ppm/°C tempco (chop off) - eliminates need for external precision reference in automotive under-hood environments.
Core Clock	ARM7TDMI up to 20.48 MHz with PLL and 8 programmable dividers - balances real-time processing latency and power consumption for embedded battery algorithms.
Operating Voltage	Direct 3.5 V to 18 V battery supply - powers from raw vehicle battery without external DC/DC regulator, simplifying BOM and layout.
Temperature Range	−40°C to +115°C ambient - qualified for engine bay and transmission-mounted battery sensors per AEC-Q100 stress requirements.
Memory	96 kB Flash/EE (10,000 cycles, 20-year retention) and 6 kB SRAM - sufficient for LIN protocol stack, calibration tables, and firmware updates over vehicle lifetime.
LIN Interface	LIN 2.0-compliant slave UART with hardware synchronization and 1–20 kbps baud rate - enables plug-and-play integration into existing automotive LIN networks without host controller modification.

Pinout & Package

ADUC7033BCPZ-8L is housed in a 48-lead, 7 mm × 7 mm LQFP package with exposed thermal pad, optimized for automotive PCB thermal dissipation and reflow compatibility.

Pin/Terminal	Circuit Role	Design Meaning
VBAT	Battery supply input	Accepts 3.5 V to 18 V unregulated battery voltage; powers internal LDOs and analog front-end directly - no external regulator required.
IIN+, IIN−	Differential current-sense inputs	High-impedance, buffered inputs for shunt-based current measurement; support ±200 mV to +300 mV range with PGA gain up to 512.
VTEMP	Temperature sensor input	Accepts die temperature or external NTC/PTC sensor; uses internal 1.2 V reference divided by 2 for 0–1.3 V range.
VBAT (attenuated)	Voltage channel input	Connects to on-chip 24× resistive attenuator for direct 12 V battery monitoring - input range 0–28.8 V, absolute max 4–18 V.
TXD/LIN	LIN bus output	Open-drain LIN driver output with dominant/recessive voltage thresholds compliant to LIN 2.0 spec; supports 1–20 kbps.
RXD/LIN	LIN bus input	Integrated LIN receiver with hysteresis (0.175 × VDD); accepts standard LIN bus signals without external transceiver.
WU	Wake-up input	High-voltage tolerant (7–18 V) interrupt pin; triggers MCU wake from power-down on edge or level - used for LIN header detection or external event.
GPIO_0–GPIO_8	General-purpose I/O	9-pin port with configurable pull-up/down; supports LIN STI, BSD, SPI, timers, and wake-up functions - reduces need for discrete logic.

Key Features

Feature	Design Value
Dual simultaneous 16-bit Σ-Δ ADCs	Enables correlated current/voltage/temperature acquisition for accurate Coulomb counting and impedance tracking without time skew.
On-chip 24× resistive attenuator	Allows direct connection to 12 V battery rail with <±0.25% total gain error - eliminates external resistor network and associated tolerance drift.
Chop-stabilized ADC architecture	Reduces offset drift to ±10 nV/°C and enables sub-μV rms noise at 1 kHz - critical for detecting microvolt-level battery EIS signatures.
LIN 2.0 slave with hardware sync	Offloads LIN protocol timing and frame validation from CPU - frees >90% of ARM7 cycles for battery modeling and diagnostics.
Low-power monitor mode (300–700 μA)	Supports continuous ADC sampling while maintaining LIN bus responsiveness - meets ISO 11898-3 sleep/wake requirements for always-on monitoring.
Automotive-qualified temperature range	Guaranteed operation from −40°C to +115°C ambient - validated for placement near battery terminals or in junction boxes without derating.

Applications

Battery State-of-Charge Monitoring	Engine Start Assist Control
Use Scenario: Real-time tracking of charge/discharge current, terminal voltage, and cell temperature in 12 V starter batteries during cranking and charging cycles. IC Role / Device Role / Timing Role: Primary sensor fusion MCU performing simultaneous ADC sampling, Coulomb integration, and SoC calculation every 100 ms. Use Value: Achieves ±1% SoC accuracy over full temperature and aging range using on-chip reference and self-calibration - eliminates periodic recalibration service intervals.	Use Scenario: Detecting weak battery conditions prior to engine start and triggering alternator pre-boost or load shedding in hybrid vehicles. IC Role / Device Role / Timing Role: LIN-connected battery health monitor providing voltage sag profile and cold-cranking amps (CCA) estimate to ECU within 50 ms of ignition request. Use Value: Uses 1 kHz ADC sampling with chop enabled to resolve 1.2 μV rms noise - captures transient voltage dip during starter motor engagement with <10 mV error.
Start-Stop System Battery Management	12 V Li-ion Battery Protection Unit
Use Scenario: Managing deep-cycle charge/discharge in micro-hybrid vehicles with frequent engine stop/start events and regenerative braking energy recovery. IC Role / Device Role / Timing Role: Dual ADC continuously monitors current direction and magnitude while voltage channel tracks state-of-health (SoH) via impedance trend analysis. Use Value: On-chip accumulator and digital comparators enable real-time amp-hour integration without CPU intervention - extends MCU sleep time and reduces system power by 40%.	Use Scenario: Replacing legacy lead-acid batteries with compact 12 V Li-ion packs requiring precise overvoltage, undervoltage, and overtemperature protection. IC Role / Device Role / Timing Role: Safety-critical battery monitor executing ISO 26262 ASIL-B compliant diagnostics on voltage, current, and temperature every 5 ms. Use Value: Internal 5 ppm/°C reference and ±2°C die temperature accuracy enable reliable cell balancing decisions - prevents thermal runaway without external sensors.

Battery State-of-Charge Monitoring

Engine Start Assist Control

Use Scenario: Real-time tracking of charge/discharge current, terminal voltage, and cell temperature in 12 V starter batteries during cranking and charging cycles.

IC Role / Device Role / Timing Role: Primary sensor fusion MCU performing simultaneous ADC sampling, Coulomb integration, and SoC calculation every 100 ms.

Use Value: Achieves ±1% SoC accuracy over full temperature and aging range using on-chip reference and self-calibration - eliminates periodic recalibration service intervals.

Use Scenario: Detecting weak battery conditions prior to engine start and triggering alternator pre-boost or load shedding in hybrid vehicles.

IC Role / Device Role / Timing Role: LIN-connected battery health monitor providing voltage sag profile and cold-cranking amps (CCA) estimate to ECU within 50 ms of ignition request.

Use Value: Uses 1 kHz ADC sampling with chop enabled to resolve 1.2 μV rms noise - captures transient voltage dip during starter motor engagement with <10 mV error.

Start-Stop System Battery Management

12 V Li-ion Battery Protection Unit

Use Scenario: Managing deep-cycle charge/discharge in micro-hybrid vehicles with frequent engine stop/start events and regenerative braking energy recovery.

IC Role / Device Role / Timing Role: Dual ADC continuously monitors current direction and magnitude while voltage channel tracks state-of-health (SoH) via impedance trend analysis.

Use Value: On-chip accumulator and digital comparators enable real-time amp-hour integration without CPU intervention - extends MCU sleep time and reduces system power by 40%.

Use Scenario: Replacing legacy lead-acid batteries with compact 12 V Li-ion packs requiring precise overvoltage, undervoltage, and overtemperature protection.

IC Role / Device Role / Timing Role: Safety-critical battery monitor executing ISO 26262 ASIL-B compliant diagnostics on voltage, current, and temperature every 5 ms.

Use Value: Internal 5 ppm/°C reference and ±2°C die temperature accuracy enable reliable cell balancing decisions - prevents thermal runaway without external sensors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUC7023BCPZ-62	Same ARM7 core and ADC architecture but single 16-bit Σ-Δ ADC channel; no integrated voltage attenuator; 62-lead LFCSP package.	Lacks dedicated 12 V battery input path - requires external attenuator for voltage sensing, increasing BOM cost and board area.	Select when only current sensing is needed or when space-constrained LFCSP packaging is preferred over LQFP.
MAX17205G+T	Dedicated fuel gauge IC with ModelGauge™ m5 algorithm; 14-bit delta-sigma ADC; no MCU core or LIN interface.	Provides higher SoC accuracy via impedance tracking but lacks programmable firmware, LIN communication, and voltage/temperature ADC flexibility.	Select for pure Li-ion SoC estimation where LIN connectivity and custom diagnostics are not required.

Compared with ADUC7033BCPZ-8L, ADUC7023BCPZ-62 requires external components for full battery sensing and offers no LIN interface, while MAX17205G+T delivers superior algorithmic SoC but cannot execute custom firmware or interface directly to automotive networks - making ADUC7033BCPZ-8L the only option integrating precision analog acquisition, real-time processing, and automotive serial communication in one package.

Availability

ADUC7033BCPZ-8L is available at Aetrix Electronics and suitable for automotive battery management systems, engine control modules, and start-stop system electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ADUC7033BCPZ-8L 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, communications, and healthcare markets with precision data acquisition and power management solutions.

The ADuC7033 product line was designed specifically for automotive battery sensing applications - integrating high-accuracy Σ-Δ converters, robust LIN connectivity, and wide-temperature MCU operation to replace multi-chip discrete sensor solutions in under-hood environments.

FAQ

What is the maximum ADC sampling rate supported by the ADUC7033BCPZ-8L?

The ADUC7033BCPZ-8L supports a maximum ADC conversion rate of 8 kHz in normal operating mode with chop disabled. When chop mode is enabled for improved offset stability, the maximum rate drops to 2.6 kHz. This specification applies to both the current and voltage/temperature ADC channels, which operate simultaneously - enabling synchronized acquisition for battery impedance analysis and real-time SoC calculation in the ADUC7033BCPZ-8L.

Does the ADUC7033BCPZ-8L require an external crystal for LIN communication?

No, the ADUC7033BCPZ-8L does not require an external crystal for LIN communication. It includes an on-chip precision oscillator (131.072 kHz, ±1%) that can serve as the LIN baud rate clock source. The device also supports external 32.768 kHz crystals or the low-power oscillator (±3%), but LIN timing compliance is maintained using internal resources - reducing bill-of-materials count and improving reliability in the ADUC7033BCPZ-8L.

How does the ADUC7033BCPZ-8L handle 12 V battery voltage sensing without external components?

The ADUC7033BCPZ-8L integrates a precision 24× resistive attenuator directly into the voltage channel ADC input path. This allows direct connection of the 12 V battery rail to the VBAT pin, scaling the input to a safe 0.5 V range for the internal 16-bit ADC. With total gain error of ±0.25% and ±3 ppm/°C drift, this eliminates the need for external resistor networks, trimming, or calibration - a core differentiator of the ADUC7033BCPZ-8L in automotive battery monitoring designs.

What power modes does the ADUC7033BCPZ-8L support for low-power battery monitoring?

The ADUC7033BCPZ-8L supports three key low-power states: (1) Normal mode (10 mA @ 10 MHz), (2) Low-power monitor mode (300–700 μA with continuous ADC sampling), and (3) Full power-down with wake-up via LIN header, WU pin, or timer. In low-power monitor mode, the ARM7 core sleeps while ADCs and LIN remain active - enabling always-on battery health checks with minimal quiescent current, a defining capability of the ADUC7033BCPZ-8L.

Is the ADUC7033BCPZ-8L qualified for automotive under-hood applications?

Yes, the ADUC7033BCPZ-8L is fully specified for −40°C to +115°C ambient operation and packaged in a 48-lead LQFP with thermal pad for enhanced heat dissipation. Its electrical specifications - including ADC offset drift, reference stability, and LIN interface performance - are guaranteed across this full range. While not explicitly AEC-Q100 certified in this revision, its design, test coverage, and qualification data align with automotive under-hood deployment requirements for the ADUC7033BCPZ-8L.

ADUC7033BCPZ-8L Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Package/Case:: 48-WFQFN Exposed Pad, CSP

Series:: -

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Battery Management

Input Type:: Logic

Output Type:: Logic

Current - Supply:: 20 mA

Operating Temperature:: -40°C ~ 115°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-LFCSP (7x7)

ADUC7033BCPZ-8L FAQ

1.How can I place an order for ADUC7033BCPZ-8L through Aetrix?

Please submit a Request for Quotation (RFQ) for ADUC7033BCPZ-8L 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 ADUC7033BCPZ-8L reliable?

The price and inventory of ADUC7033BCPZ-8L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUC7033BCPZ-8L is usually 5 days.

3.What payment methods are accepted for ADUC7033BCPZ-8L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUC7033BCPZ-8L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADUC7033BCPZ-8L?

ADUC7033BCPZ-8L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADUC7033BCPZ-8L 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 ADUC7033BCPZ-8L?

For technical support, including ADUC7033BCPZ-8L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUC7033BCPZ-8L requirements.

6.How does Aetrix verify that ADUC7033BCPZ-8L is sourced from the original manufacturer or authorized distributors?

All ADUC7033BCPZ-8L 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 ADUC7033BCPZ-8L meets industry standards.

7.What is the process for return or replacement of ADUC7033BCPZ-8L?

All ADUC7033BCPZ-8L units undergo pre-shipment inspection (PSI). If there is an issue with ADUC7033BCPZ-8L, 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 ADUC7033BCPZ-8L part is unused and in its original packaging.

Return procedure for ADUC7033BCPZ-8L:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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