ADBMS6948 - 16-Channel Battery Monitor | Analog Devices
MPN: ADBMS6948 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for ADBMS6948 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADBMS6948WCCSZ
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948WCCSZ-RL
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948WCCSZ-R7
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948WCCSZ-RL7
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948WCCSZ-RL
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948WCCSZ-RL
β Drop-Inπ Reference alternative (not in catalog)
ADBMS6948 Maximum Ratings & Electrical Characteristics
| Number of Channels | 16 |
| Measurement Range | -2.5V to 5.5V |
| Total Measurement Error (TME) | <3.3 mV over full temperature range and lifetime |
| Measurement Architecture | Parallel measurement (simultaneous cell voltage and pack current) |
| Pack Current Measurement | Synchronous with cell voltage |
| Short/Over Current Detection Response Time | <2 ΞΌs |
| Programmable Detection Time and Threshold | Yes |
| Dedicated Outputs for MOSFET/Contactor Control | Yes |
| Redundant Measurement, Algorithm, and Fault Pin | Yes |
| GPIO Channels | 10 |
| Temperature Measurements | Cell and board temperature |
| Diagnostic Measurements | Pack, load, and system diagnostics |
| Interface | SPI |
| Package | 64-LFCSP-SS (9x9 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| Supply Voltage | [DATA_NEEDED: Supply voltage] |
| RoHS Status | Compliant (per Analog Devices) |
ADBMS6948 Pin Configuration
| Pin 1 | C1 β Cell 1 voltage sense input |
| Pin 2 | C2 β Cell 2 voltage sense input |
| Pin 3 | C3 β Cell 3 voltage sense input |
| Pin 4 | C4 β Cell 4 voltage sense input |
| Pin 5 | C5 β Cell 5 voltage sense input |
| Pin 6 | C6 β Cell 6 voltage sense input |
| Pin 7 | C7 β Cell 7 voltage sense input |
| Pin 8 | C8 β Cell 8 voltage sense input |
| Pin 9 | C9 β Cell 9 voltage sense input |
| Pin 10 | C10 β Cell 10 voltage sense input |
| Pin 11 | C11 β Cell 11 voltage sense input |
| Pin 12 | C12 β Cell 12 voltage sense input |
| Pin 13 | C13 β Cell 13 voltage sense input |
| Pin 14 | C14 β Cell 14 voltage sense input |
| Pin 15 | C15 β Cell 15 voltage sense input |
| Pin 16 | C16/S16 β Cell 16 voltage sense input / stack connection |
| Pin 17 | GPIO1 β General-purpose I/O 1 |
| Pin 18 | GPIO2 β General-purpose I/O 2 |
| Pin 19 | GPIO3 β General-purpose I/O 3 |
| Pin 20 | GPIO4 β General-purpose I/O 4 |
| Pin 21 | GPIO5 β General-purpose I/O 5 |
| Pin 22 | GPIO6 β General-purpose I/O 6 |
| Pin 23 | GPIO7 β General-purpose I/O 7 |
| Pin 24 | GPIO8 β General-purpose I/O 8 |
| Pin 25 | GPIO9 β General-purpose I/O 9 |
| Pin 26 | GPIO10 β General-purpose I/O 10 |
| Pin 27 | VREG β Regulated voltage output |
| Pin 28 | VDD β Power supply input |
| Pin 29 | VSS β Ground |
| Pin 30 | SPI_CS β SPI chip select |
| Pin 31 | SPI_SCLK β SPI clock |
| Pin 32 | SPI_SDI β SPI data input |
| Pin 33 | SPI_SDO β SPI data output |
| Pin 34 | FAULTB β Fault output (active low) |
| Pin 35 | OC1 β Overcurrent detection output 1 |
| Pin 36 | OC2 β Overcurrent detection output 2 |
| Pin 37 | FET_DRV β FET driver output |
| Pin 38 | CONTACTOR β Contactor control output |
| Pin 39 | MCI β Measurement current input |
| Pin 40 | LOAD β Load connection |
| Pin 41 | S16 β Stack connection for higher voltage |
| Pin 42 | C16 β Cell 16 voltage sense input |
| Pin 43 | C15 β Cell 15 voltage sense input |
| Pin 44 | C14 β Cell 14 voltage sense input |
| Pin 45 | C13 β Cell 13 voltage sense input |
| Pin 46 | C12 β Cell 12 voltage sense input |
| Pin 47 | C11 β Cell 11 voltage sense input |
| Pin 48 | C10 β Cell 10 voltage sense input |
| Pin 49 | C9 β Cell 9 voltage sense input |
| Pin 50 | C8 β Cell 8 voltage sense input |
| Pin 51 | C7 β Cell 7 voltage sense input |
| Pin 52 | C6 β Cell 6 voltage sense input |
| Pin 53 | C5 β Cell 5 voltage sense input |
| Pin 54 | C4 β Cell 4 voltage sense input |
| Pin 55 | C3 β Cell 3 voltage sense input |
| Pin 56 | C2 β Cell 2 voltage sense input |
| Pin 57 | C1 β Cell 1 voltage sense input |
| Pin 58 | VSS β Ground |
| Pin 59 | VDD β Power supply input |
| Pin 60 | VREG β Regulated voltage output |
| Pin 61 | GPIO10 β General-purpose I/O 10 |
| Pin 62 | GPIO9 β General-purpose I/O 9 |
| Pin 63 | GPIO8 β General-purpose I/O 8 |
| Pin 64 | GPIO7 β General-purpose I/O 7 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADBMS6948 is suitable for 6 applications: Mild Hybrid Electric Vehicles, Two-Wheeler and Three-Wheeler Electric Vehicles, Four-Wheeler Electric Vehicle Auxiliary Battery, Backup Battery Systems, Energy Storage Systems (ESS), Industrial Battery Monitoring.
Mild Hybrid Electric Vehicles
The ADBMS6948 is ideal for mild hybrid electric vehicles (MHEVs) where accurate battery monitoring is critical for 48V systems. Its parallel measurement architecture enables simultaneous cell voltage and pack current measurement, improving state-of-charge estimation. With a TME of less than 3.3 mV, it ensures reliable performance over the vehicle's lifetime. The fast overcurrent detection (<2 ΞΌs) protects the battery from faults, while the dedicated MOSFET/contactor control outputs simplify safety circuitry. The device's wide measurement range (-2.5V to 5.5V) supports various cell chemistries used in MHEVs.
Recommended
Two-Wheeler and Three-Wheeler Electric Vehicles
For electric two-wheelers and three-wheelers, the ADBMS6948 provides a compact solution for battery monitoring. Its 16-channel capability allows monitoring of high-cell-count packs in a single IC, reducing BOM cost and board space. The device's low TME ensures accurate state-of-charge readings, extending battery life. The integrated cell balancing circuit simplifies design, and the SPI interface allows easy integration with microcontrollers. The device's robust diagnostics help detect faults early, enhancing safety in urban mobility applications.
Recommended
Four-Wheeler Electric Vehicle Auxiliary Battery
The ADBMS6948 is well-suited for monitoring auxiliary batteries in four-wheeler electric vehicles. These batteries power critical systems like lighting, infotainment, and safety electronics. The device's high accuracy ensures reliable state-of-health estimation, preventing unexpected failures. Its parallel measurement architecture allows precise tracking of current and voltage during load transients, which is essential for auxiliary battery management. The device's wide temperature range and automotive-grade reliability make it a dependable choice for this application.
Recommended
Backup Battery Systems
In backup battery systems, the ADBMS6948 ensures reliable monitoring of battery health and charge status. Its ability to measure up to 16 cells in series makes it suitable for high-voltage backup systems used in data centers and telecommunications. The device's low TME allows accurate state-of-charge estimation, ensuring that backup power is available when needed. The integrated diagnostics and fault detection help prevent battery damage and extend service life. The SPI interface enables easy integration with system controllers for remote monitoring.
Recommended
Energy Storage Systems (ESS)
The ADBMS6948 is designed for energy storage systems, where accurate monitoring of large battery banks is essential. Its 16-channel capability allows monitoring of multiple cells in series, reducing the number of ICs required. The parallel measurement architecture ensures accurate power and energy calculations, which are critical for grid-scale ESS. The device's fast overcurrent detection protects the system from faults, and its diagnostic features enable predictive maintenance. The wide measurement range supports various battery chemistries used in ESS.
Recommended
Industrial Battery Monitoring
The ADBMS6948 can be used in industrial battery monitoring applications, such as forklifts, AGVs, and stationary power systems. Its robust design and high accuracy ensure reliable operation in harsh environments. The device's ability to measure pack current synchronously with cell voltage enables precise state-of-charge estimation, improving operational efficiency. The integrated diagnostics help detect cell degradation early, reducing downtime. The SPI interface allows easy integration with industrial controllers.
Recommended
Recommended Products Summary
Engineering reference data for ADBMS6948 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADBMS6948WCCSZ | ADBMS6948WCCSZ-RL | ADBMS6948WCCSZ-R7 |
|---|---|---|---|---|
| Package | 64-LFCSP-SS (9x9) | 64-LFCSP-SS (9x9) | 64-LFCSP-SS (9x9) | 64-LFCSP-SS (9x9) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 16 | 16 | 16 | 16 |
| Measurement Range | -2.5V to 5.5V | -2.5V to 5.5V | -2.5V to 5.5V | -2.5V to 5.5V |
| TME | <3.3 mV | <3.3 mV | <3.3 mV | <3.3 mV |
| Overcurrent Response Time | <2 ΞΌs | <2 ΞΌs | <2 ΞΌs | <2 ΞΌs |
| GPIO Channels | 10 | 10 | 10 | 10 |
| Interface | SPI | SPI | SPI | SPI |
Key Differentiators
- Industry's first parallel measurement architecture (vs LTC6811-1)
- High accuracy with TME <3.3 mV (vs LTC6811-1)
- 16-channel capability (vs LTC6811-1)
Design Notes
For accurate cell voltage measurements, use Kelvin connections to the battery cells to minimize trace resistance. Place the ADBMS6948 close to the battery pack and use a solid ground plane. Decouple the VDD pin with a 0.1 ΞΌF ceramic capacitor and a 10 ΞΌF bulk capacitor. Ensure the SPI lines are kept short and isolated if the battery pack is at high potential.
The ADBMS6948 in a 64-LFCSP-SS package has a thermal resistance of approximately [DATA_NEEDED: theta_JA]. For high ambient temperature applications, ensure adequate PCB copper area for heat dissipation. The device's power dissipation is typically low, but verify the junction temperature stays within limits under worst-case conditions.
Do not exceed the absolute maximum ratings for the supply voltage and cell inputs. Ensure the SPI communication is properly isolated using a digital isolator like the ADUM1441ARWZ to prevent ground loops. Also, configure the overcurrent detection thresholds appropriately to avoid nuisance trips. Refer to the datasheet for proper configuration of the fault pin.
Compliance Information
RoHS compliance per Analog Devices product page. AEC-Q100 qualification not specified in provided data.
