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Analog Devices Inc. LTC6804IG-1#TRPBF
- Part No.:
- LTC6804IG-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 48-FSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6804IG-1#TRPBF.pdf
- Description:
- IC BATT MON MULTI 1-12C 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,275
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Product details
Overview
LTC6804IG-1#TRPBF from Analog Devices (formerly Linear Technology) is a 3rd-generation multicell battery monitor IC designed for high-accuracy voltage measurement of up to 12 series-connected lithium-ion or LiFePO₄ cells. It delivers ≤1.2mV total measurement error, captures all 12 cell voltages in 290µs, and integrates passive balancing, isoSPI daisy-chain communication, and a 5V onboard regulator - enabling use in electric vehicle battery management systems (BMS), grid-scale energy storage, and industrial backup power.
For engineers reviewing the LTC6804IG-1#TRPBF datasheet, LTC6804IG-1#TRPBF pinout, LTC6804IG-1#TRPBF application, or LTC6804IG-1#TRPBF equivalent, key selection criteria include its ±1.2mV total measurement error over –40°C to +85°C, 48-lead SSOP package with isolated isoSPI interface, programmable fast/normal/filtered ADC modes, 4µA sleep current, and support for stackable BMS architectures requiring ISO 26262 compliance.
Technical Context
The LTC6804IG-1#TRPBF implements a 16-bit delta-sigma ADC with frequency-programmable 3rd-order noise filtering, supporting three acquisition modes: Fast (≤10µs/cell), Normal (≤290µs for 12 cells), and Filtered (≥183ms for 12 cells). Its isoSPI interface operates at 1Mbps over a single twisted pair up to 100 meters, with RF-immune differential signaling and automatic wake-up detection.
It features integrated passive cell balancing with programmable discharge timers, five general-purpose I/O pins configurable as analog inputs (e.g., temperature sensors) or digital I²C/SPI masters, and dual precision voltage references (VREF1 = 3.2V ±10mV, VREF2 = 3.0V ±10mV) with <10ppm/°C TC. Power is supplied directly from the monitored battery stack (V+ range: 11V–55V) or an isolated source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Measurement Error | ±1.2mV max in Normal mode - ensures sub-0.03% accuracy for 4.2V Li-ion cells, critical for state-of-charge estimation. |
| Cell Measurement Speed | 290µs for all 12 cells - enables synchronized voltage/current sampling in dynamic BMS applications. |
| isoSPI Data Rate | 1Mbps - supports real-time telemetry from multi-tier battery stacks without latency bottlenecks. |
| Sleep Current | 4µA - extends standby life in always-on BMS monitoring without compromising responsiveness. |
| Operating Temp Range | –40°C to +85°C - qualified for automotive cabin and industrial energy storage environments. |
| ADC Resolution | 0.1mV/bit - provides 16-bit effective resolution across 0–5V input range for fine-grained cell analysis. |
| Passive Balancing | Internal MOSFETs with ≤25Ω ON resistance - allows direct connection to external 100Ω discharge resistors for thermal-safe cell equalization. |
Pinout & Package
The LTC6804IG-1#TRPBF is housed in a 48-lead plastic SSOP (G package) with exposed pad for thermal management. Pin functions depend on ISOMD configuration: when tied to V–, it enables standard SPI (CSB/SCK/SDI/SDO); when tied to VREG, it enables isoSPI (IPA/IMA/IPB/IMB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+, V– | Power supply rails | V+ accepts 11–55V battery stack input; V– is system ground reference for all measurements. |
| C0–C12, S0–S12 | Cell voltage inputs | Cn measures voltage at node n; Sn connects to discharge resistor for passive balancing of cell n. |
| ISOMD | Interface mode select | Determines SPI vs isoSPI operation - critical for daisy-chain (LTC6804-1) or parallel (LTC6804-2) topology implementation. |
| GPIO1–GPIO5 | Configurable I/O | Support temperature sensing, digital control, or I²C/SPI master functions - eliminates need for external interface ICs. |
| VREG, DRIVE | Regulator output & driver | VREG supplies 5V ±0.25% to internal circuitry; DRIVE powers external isolated DC/DC converters or drives VREG. |
Key Features
| Feature | Design Value |
|---|---|
| isoSPI daisy-chain interface | Enables >100-cell monitoring with single host connection and immunity to EMI in high-noise EV environments. |
| Programmable ADC filtering | Three modes (Fast/Normal/Filtered) let designers trade speed vs noise rejection per application - e.g., Filtered mode for stationary grid storage. |
| Onboard 5V regulator | Eliminates need for external LDO; regulates from battery stack or DRIVE pin - simplifies power architecture and reduces BOM count. |
| ISO 26262-compliant design | Includes built-in diagnostics (watchdog, open-wire detection, CRC checks) meeting ASIL-B requirements for automotive BMS safety integrity. |
| 5-channel auxiliary input | Converts temperature, current shunt, or other analog signals with same 16-bit ADC - consolidates sensor signal chain into single IC. |
Applications
| Electric Vehicle Battery Packs | Grid-Scale Energy Storage |
|---|---|
Use Scenario: Monitoring 96-cell (8× LTC6804IG-1#TRPBF) traction battery in BEV with active thermal management. IC Role / Device Role / Timing Role: Primary cell voltage and temperature acquisition IC; synchronizes measurements across modules via isoSPI daisy-chain. Use Value: ±1.2mV accuracy enables <0.5% SOC error over lifetime; 4µA sleep current minimizes parasitic drain during parking. | Use Scenario: Supervising 240-cell lithium iron phosphate (LiFePO₄) string in utility-scale 2MW/4MWh containerized ESS. IC Role / Device Role / Timing Role: High-reliability stack monitor with redundant isoSPI links and filtered ADC mode for low-noise DC bus environments. Use Value: 183ms filtered acquisition rejects switching noise from inverters; ISO 26262 diagnostics support functional safety certification. |
| Industrial Backup Power Systems | High-Power Portable Equipment |
Use Scenario: 48-cell UPS for datacenter rack with runtime extension via cell-level balancing. IC Role / Device Role / Timing Role: Central BMS monitor with passive balancing control and GPIO-driven relay isolation. Use Value: Internal 25Ω discharge switch + programmable timer enables precise 50mA balancing current without external FET drivers. | Use Scenario: 12S drone battery pack requiring lightweight, high-speed telemetry during flight maneuvers. IC Role / Device Role / Timing Role: Ultra-fast cell monitor using Fast mode (1010µs for 12 cells) and GPIO-based current sensing. Use Value: 290µs Normal mode capture supports closed-loop voltage regulation at 3kHz update rate for motor controller feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multicell battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7695203RSMR | TI device with integrated 3.3V LDO, lower 1.5mV TME, but no isoSPI - uses standard SPI with external isolators. | Requires additional isolation components for high-voltage stacks; lacks built-in 5V regulator. | Prefer when cost-sensitive designs can accept added board area and complexity for isolation. |
| MAX17853GCM+ | Maxim device with 1.5mV TME, CAN interface, and higher 125°C temp grade - but larger 64-pin TQFP package. | Targets heavy-duty automotive under-hood use; CAN simplifies integration with vehicle networks. | Choose when CAN bus connectivity and extended temperature range outweigh SSOP footprint constraints. |
Compared with BQ7695203RSMR and MAX17853GCM+, the LTC6804IG-1#TRPBF uniquely combines isoSPI's inherent galvanic isolation, onboard 5V regulation, and industry-leading 1.2mV measurement accuracy in a compact 48-pin SSOP - making it optimal for space-constrained, high-reliability BMS where minimizing external components and EMI susceptibility is critical.
Availability
LTC6804IG-1#TRPBF is available at Aetrix Electronics and suitable for electric vehicle battery management, grid-scale energy storage, and industrial backup power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC6804IG-1#TRPBF 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 acquired Linear Technology in 2017 and maintains its high-performance analog and mixed-signal product lines, including precision battery monitoring ICs.
The LTC6804IG-1#TRPBF belongs to the LTC® multicell battery monitor family, engineered specifically for ISO 26262-compliant automotive and industrial BMS applications demanding ultra-low measurement error, robust communication, and integrated power management.
FAQ
What is the maximum number of cells that LTC6804IG-1#TRPBF can monitor in a single device?
The LTC6804IG-1#TRPBF monitors up to 12 series-connected battery cells directly. Its daisy-chain isoSPI interface allows multiple LTC6804IG-1#TRPBF devices to be stacked - enabling monitoring of hundreds of cells in high-voltage battery strings without additional host interfaces.
Does LTC6804IG-1#TRPBF require an external isolated power supply?
No. The LTC6804IG-1#TRPBF can be powered directly from the monitored battery stack (V+ to V–) and includes an onboard 5V regulator (VREG). It also supports isolated operation via the DRIVE pin to power external isolated DC/DC converters - eliminating mandatory external isolation.
How does the isoSPI interface of LTC6804IG-1#TRPBF differ from standard SPI?
The isoSPI interface in LTC6804IG-1#TRPBF uses differential signaling over a single twisted pair, providing inherent galvanic isolation, 1Mbps throughput, and immunity to EMI - unlike standard SPI which requires external isolators for high-voltage battery monitoring. It supports both daisy-chain (LTC6804-1) and parallel (LTC6804-2) topologies.
What are the supported ADC measurement modes in LTC6804IG-1#TRPBF?
The LTC6804IG-1#TRPBF supports three ADC modes: Fast (1010µs for 12 cells, ±10mV TME), Normal (290µs, ±1.2mV TME), and Filtered (183ms, ±1.0mV TME). Mode selection balances speed, noise rejection, and accuracy - configurable via command register writes.
Is LTC6804IG-1#TRPBF qualified for automotive applications?
Yes. The LTC6804IG-1#TRPBF is specified for –40°C to +85°C operation (I-grade), features ISO 26262-compliant diagnostics (watchdog, open-wire detection, CRC), and is widely deployed in automotive BMS designs - though full ASIL certification requires system-level integration and validation.
LTC6804IG-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-FSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 12
- Fault Protection:
- Over/Under Voltage
- Interface:
- I2C, SPI
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
LTC6804IG-1#TRPBF FAQ
1.How can I place an order for LTC6804IG-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6804IG-1#TRPBF 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 LTC6804IG-1#TRPBF reliable?
The price and inventory of LTC6804IG-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6804IG-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6804IG-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6804IG-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6804IG-1#TRPBF?
LTC6804IG-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6804IG-1#TRPBF 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 LTC6804IG-1#TRPBF?
For technical support, including LTC6804IG-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6804IG-1#TRPBF requirements.
6.How does Aetrix verify that LTC6804IG-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6804IG-1#TRPBF 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 LTC6804IG-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6804IG-1#TRPBF?
All LTC6804IG-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6804IG-1#TRPBF, 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 LTC6804IG-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC6804IG-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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