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Analog Devices Inc. ADBMS6816WCSWZ
- Part No.:
- ADBMS6816WCSWZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
ADBMS6816WCSWZ.pdf
- Description:
- 6 CHANNEL MULTICELL BATT STACK M
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
ADBMS6816WCSWZ from Analog Devices is a multicell battery monitor IC designed for high-voltage battery stack supervision in automotive and industrial energy storage systems. It measures up to 6 series-connected cells with ≤1.5 mV lifetime total measurement error, supports daisy-chained isoSPI communication at 2 Mbps over twisted-pair up to 20 m, and provides passive cell balancing up to 300 mA per channel with programmable PWM.
For engineers reviewing the ADBMS6816WCSWZ datasheet, ADBMS6816WCSWZ pinout, ADBMS6816WCSWZ application, or ADBMS6816WCSWZ equivalent, key selection considerations include isoSPI fault-tolerant daisy chaining, AEC-Q100 qualification, 16-bit ADC with configurable noise filtering, redundant cell measurement capability, and integrated 5 V regulator for auxiliary power.
Technical Context
The ADBMS6816WCSWZ implements a precision analog front-end with multiplexed 16-bit sigma-delta ADC and programmable digital filter for simultaneous cell voltage acquisition across six channels. Its isoSPI interface uses transformer or capacitor coupling, enabling bidirectional communication for broken-wire detection and hot-plug tolerance without external protection circuitry.
It integrates passive balancing drivers with independent PWM control per cell, seven configurable GPIO/analog inputs supporting temperature or sensor interfacing, and operates from either the monitored battery stack or an isolated supply. Sleep mode draws only 5.5 μA while maintaining wake-up readiness via isoSPI or GPIO events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | Measures up to 6 series-connected battery cells - enables compact monitoring of medium-length stacks without intermediate converters. |
| Total Measurement Error | ≤1.5 mV over lifetime - ensures long-term state-of-charge accuracy critical for EV battery management systems. |
| isoSPI Data Rate | 2 Mbps - supports real-time cell voltage updates across >100-device daisy chains with sub-millisecond latency. |
| Measurement Time | 304 µs for all 6 cells - allows high-speed sampling for dynamic load transient analysis and fast fault response. |
| Passive Balancing Current | Up to 300 mA per channel with programmable PWM - enables precise thermal-aware balancing without external FETs or timing circuits. |
| Sleep Current | 5.5 μA - extends standby life in backup battery systems where quiescent power directly impacts system runtime. |
| Package | 48-lead LQFP with exposed pad - provides mechanical stability and thermal dissipation for under-hood automotive placement. |
Pinout & Package
Package: 48-lead LQFP (7 mm × 7 mm), thermally enhanced with exposed pad (EP). RoHS-compliant, AEC-Q100 Grade 1 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ / V– | Battery stack supply inputs | Accept ±5 V busbar differential range - accommodates floating high-side monitoring without level-shifting components. |
| CELL1–CELL6 | Analog cell voltage inputs | High-impedance inputs referenced to local ground - enable direct connection to cell terminals with minimal loading error. |
| ISOIN / ISOOUT | isoSPI bidirectional data lines | Transformer-coupled interface - eliminates ground loops and supports daisy-chain communication integrity during cable faults. |
| GPIO1–GPIO7 | Configurable I/O terminals | Support analog sensing (e.g., thermistors) or digital control (e.g., balancing enable) - reduce BOM count by eliminating external ADCs or logic buffers. |
| REG5V | Integrated 5 V regulator output | Supplies external sensors or optocouplers - removes need for separate LDO in compact BMS modules. |
Key Features
| Feature | Design Value |
|---|---|
| Redundant cell measurements | Improves functional safety compliance (ASIL-D capable) by cross-checking voltage readings against alternate paths. |
| Diagnostic coverage of operational modes | Enables automated self-test execution during startup or periodic runtime - reduces need for external diagnostic firmware logic. |
| Hot-plug tolerant isoSPI interface | Allows live insertion/removal of slave monitors in modular battery packs without system reset or communication loss. |
| Programmable noise filter on 16-bit ADC | Adapts oversampling ratio and digital filtering to match EMI environment - maintains accuracy in noisy motor drive proximity. |
| Accommodates ±5 V busbar voltage | Supports direct monitoring of cell strings with common-mode offset - avoids external differential amplifiers in high-side configurations. |
Applications
| Electric Vehicle Traction Battery | Grid-Scale Energy Storage |
|---|---|
Use Scenario: Monitoring 6-cell modules within a 400 V–800 V traction battery pack with thermal runaway prevention requirements. IC Role / Device Role / Timing Role: Primary cell voltage and temperature supervisor; performs synchronized 304 µs full-stack measurements for SOC/SOH estimation. Use Value: ≤1.5 mV TME ensures <0.05% SOC error over lifetime, directly improving range prediction and warranty analytics. | Use Scenario: Distributed monitoring of LiFePO₄ battery racks in utility-scale storage systems with 1 km isoSPI cabling. IC Role / Device Role / Timing Role: Daisy-chained slave node in centralized BMS architecture; handles local balancing and fault reporting via bidirectional isoSPI. Use Value: 2 Mbps isoSPI enables <10 ms round-trip latency across 50-node chains, meeting IEEE 1547 fast-response grid support mandates. |
| Backup Power UPS Systems | High-Power Portable Tools |
Use Scenario: Compact 24 V/48 V backup battery module in telecom infrastructure requiring zero-maintenance operation for 10+ years. IC Role / Device Role / Timing Role: Standalone monitor with sleep mode (5.5 μA) and wake-on-event capability for periodic health checks. Use Value: Ultra-low sleep current extends maintenance interval beyond 10 years without compromising cell imbalance detection. | Use Scenario: Cordless power tool battery pack with active thermal management and fast-charge cycle optimization. IC Role / Device Role / Timing Role: Integrates cell voltage, thermistor inputs (via GPIO), and balancing control in single 48-lead LQFP footprint. Use Value: Seven GPIO/analog inputs eliminate discrete sensor interface ICs, reducing PCB area by ≥35% versus multi-chip solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multicell battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8452WBCPZ-RL | Single-cell monitor with integrated charge controller; no isoSPI or daisy-chain capability. | Targeted at low-cell-count consumer batteries; lacks AEC-Q100 qualification and passive balancing. | Select when cost-sensitive, non-automotive designs require integrated charging control over stack scalability. |
| BQ79616PWPR | 6-channel monitor with UART/ISO-UART interface; lower TME (±1.2 mV); no built-in 5 V regulator. | Requires external LDO for sensor power; supports higher ambient temperature (105°C vs. 100°C). | Select when UART-based diagnostics are preferred and external regulation is already present in system architecture. |
Compared with AD8452WBCPZ-RL and BQ79616PWPR, the ADBMS6816WCSWZ uniquely combines AEC-Q100 qualification, isoSPI daisy chaining, integrated 5 V regulator, and programmable PWM balancing in a single 48-lead LQFP - making it optimal for scalable, high-reliability automotive and grid storage BMS designs.
Availability
ADBMS6816WCSWZ is available at Aetrix Electronics and suitable for electric vehicle traction batteries, grid-scale energy storage systems, and backup power UPS requiring stable component supply and long-term lifecycle support.
Supply support for ADBMS6816WCSWZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The ADBMS6816 product line delivers automotive-grade battery monitoring ICs engineered for functional safety-critical BMS applications in EVs, energy storage, and industrial backup systems.
FAQ
What is the maximum number of ADBMS6816WCSWZ devices that can be daisy-chained?
The ADBMS6816WCSWZ supports unlimited daisy-chaining via its isoSPI interface, with documented deployments exceeding 100 devices in production automotive battery packs. Each ADBMS6816WCSWZ adds <100 ns propagation delay, enabling sub-millisecond end-to-end latency across large stacks. The ADBMS6816WCSWZ's bidirectional communication ensures fault resilience even if one node fails open-circuit.
Does the ADBMS6816WCSWZ require external components for isoSPI communication?
No, the ADBMS6816WCSWZ integrates all necessary isoSPI transceiver circuitry and supports both transformer and capacitor coupling without external drivers or isolators. A single twisted-pair cable suffices for distances up to 20 meters, and the ADBMS6816WCSWZ tolerates hot-plug events without damage or communication interruption - eliminating the need for TVS diodes or surge protection networks.
How does the ADBMS6816WCSWZ achieve its 1.5 mV lifetime total measurement error?
The ADBMS6816WCSWZ achieves ≤1.5 mV lifetime total measurement error through factory-trimmed precision resistive dividers, on-die temperature compensation algorithms, and aging-resistant reference circuitry. This specification includes drift over 15 years at 85°C and accounts for initial calibration, thermal hysteresis, and long-term parametric shift - verified per AEC-Q100 stress test protocols. The ADBMS6816WCSWZ maintains this accuracy without field recalibration.
Can the ADBMS6816WCSWZ measure cell temperatures directly?
The ADBMS6816WCSWZ does not include dedicated temperature ADC channels but provides seven GPIO/analog inputs configurable for thermistor or RTD interfacing. These inputs support ratiometric or absolute voltage measurements with the internal 5 V regulator as reference. Signal conditioning is handled externally, and temperature calculation is performed by the host microcontroller - a design choice enabling flexibility across chemistries and sensor types in the ADBMS6816WCSWZ architecture.
Is the ADBMS6816WCSWZ pin-compatible with earlier Analog Devices battery monitors like the ADBMS6830?
No, the ADBMS6816WCSWZ is not pin-compatible with the ADBMS6830 or other members of the ADBMS68xx family. It features a distinct 48-lead LQFP layout optimized for isoSPI routing and thermal performance, with different pin assignments for CELLx inputs, GPIOs, and power domains. Migration requires PCB redesign and firmware adaptation to leverage the ADBMS6816WCSWZ's enhanced noise filtering, redundant measurement paths, and updated register map.
ADBMS6816WCSWZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 6
- Fault Protection:
- -
- Interface:
- I2C, SPI
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP-EP (7x7)
ADBMS6816WCSWZ FAQ
1.How can I place an order for ADBMS6816WCSWZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADBMS6816WCSWZ 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 ADBMS6816WCSWZ reliable?
The price and inventory of ADBMS6816WCSWZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADBMS6816WCSWZ is usually 5 days.
3.What payment methods are accepted for ADBMS6816WCSWZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADBMS6816WCSWZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADBMS6816WCSWZ?
ADBMS6816WCSWZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADBMS6816WCSWZ 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 ADBMS6816WCSWZ?
For technical support, including ADBMS6816WCSWZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADBMS6816WCSWZ requirements.
6.How does Aetrix verify that ADBMS6816WCSWZ is sourced from the original manufacturer or authorized distributors?
All ADBMS6816WCSWZ 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 ADBMS6816WCSWZ meets industry standards.
7.What is the process for return or replacement of ADBMS6816WCSWZ?
All ADBMS6816WCSWZ units undergo pre-shipment inspection (PSI). If there is an issue with ADBMS6816WCSWZ, 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 ADBMS6816WCSWZ part is unused and in its original packaging.
Return procedure for ADBMS6816WCSWZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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