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Analog Devices Inc. LTC6803IG-1#TRPBF
- Part No.:
- LTC6803IG-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 44-FSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6803IG-1#TRPBF.pdf
- Description:
- IC BATT MON MULTI 1-12C 44SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
LTC6803IG-1#TRPBF from Analog Devices (formerly Linear Technology) is a 12-cell battery monitor IC with integrated 12-bit delta-sigma ADC, precision 3.065V reference, passive cell balancing MOSFETs, and daisy-chainable SPI-compatible serial interface. It supports up to 75V total stack voltage, achieves ±2.8mV total measurement error at 3.6V cell voltage, and operates from –40°C to 85°C in automotive and industrial battery management systems.
For engineers reviewing the LTC6803IG-1#TRPBF datasheet, LTC6803IG-1#TRPBF pinout, LTC6803IG-1#TRPBF application, or LTC6803IG-1#TRPBF equivalent, key selection criteria include its internal C0-to-V– connection for drop-in LTC6802‑1 replacement, 13ms full-stack measurement time, 12µA standby supply current, and ISO26262-compliant architecture for functional safety-critical BMS designs.
Technical Context
The LTC6803IG-1#TRPBF implements a high-voltage input multiplexer feeding a 12-bit delta-sigma ADC with built-in noise filtering and 8ppm/°C reference stability. Its level-shifting serial interface enables galvanically isolated daisy-chaining without optocouplers - CSBO/SCKO/SDOI outputs drive adjacent devices while CSBI/SCKI/SDI accept inputs from upstream units.
It features dual-mode digital I/O: voltage-mode (VMODE = VREG) for TTL-level host MCU interfacing, and current-mode (VMODE = V–) for inter-device communication. Cell balancing is implemented via 12 dedicated Sx pins with integrated 20Ω NMOS switches, controllable only by host processor writes to configuration registers - no autonomous decision logic is embedded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Supply Voltage | Up to 75V (V+ to V–); enables direct monitoring of 12S Li-ion or 20S LFP stacks without external level shifters. |
| Cell Measurement Accuracy | ±2.8mV max total error at 3.6V (LTC6803IG grade); ensures <0.25% full-scale error for precise state-of-charge estimation. |
| Measurement Time | 13ms for all 12 cells; supports real-time BMS response in fast-changing load conditions. |
| Standby Supply Current | 12µA typical; minimizes parasitic drain in parked EVs or backup power systems. |
| Cell Balancing | Integrated 20Ω NMOS on each Sx pin; allows direct discharge control or external FET gate driving with pull-up PMOS. |
| Temperature Range | –40°C to +85°C (Industrial grade); validated for under-hood automotive and industrial UPS environments. |
| Package | 44-lead SSOP (G package); surface-mount compatible with standard reflow profiles and automated optical inspection. |
Pinout & Package
Package: 44-lead plastic SSOP (G package), 0.209" body width, JEDEC MS-013AC compliant. Thermal resistance θJA = 70°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CSBO (1) | Chip Select Output | Active-low buffered CSBI signal driving next device in daisy chain; eliminates need for external level shifters. |
| SDOI (2) | Serial Data I/O | Bi-directional data path between adjacent LTC6803 devices; enables isolated stack communication without optocouplers. |
| SCKO (3) | Serial Clock Output | Buffered SCKI output synchronizing downstream device; maintains timing integrity across multi-IC chains. |
| V+ (4) | Positive Supply Input | Accepts up to 75V; powers internal circuitry and enables zero-current shutdown when floated. |
| C12–C1 (5,7,9,11,13,15,17,19,21,23,25,27) | Cell Voltage Inputs | High-impedance inputs measuring 12 series-connected cells; C12 referenced to V+ and C0 to V– (LTC6803-1). |
| S12–S1 (6,8,10,12,14,16,18,20,22,24,26,28) | Cell Balancing Outputs | Open-drain NMOS with 20Ω RDS(on); directly discharges overcharged cells or drives external balancing FET gates. |
| V– (29) | Negative Supply Reference | Internally connected to C0 in LTC6803-1; establishes Kelvin reference for bottom cell measurement accuracy. |
| VTEMP1/VTEMP2 (31,32) | Thermistor Inputs | ADC-measured analog inputs (0–5.125V vs V–); support NTC/PTC sensing with onboard 3.065V reference. |
| VREF (33) | Precision Reference Output | 3.065V ±10mV, 8ppm/°C TC; supplies stable reference for external thermistor dividers and ADC calibration. |
| VMODE (40) | Interface Mode Select | Configures serial I/O as TTL (VMODE=VREG) or current-mode (VMODE=V–) for daisy-chain compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| Stackable Daisy-Chain Architecture | Enables monitoring of >100 cells using only 4 host MCU pins - no isolators, optocouplers, or additional level-shifting ICs required. |
| Passive Cell Balancing with Integrated FETs | 12 dedicated Sx pins with 20Ω NMOS switches reduce PCB area and BOM count versus discrete balancing solutions. |
| ISO26262-Compliant Design | Built-in self-tests, watchdog timer with 1–2.5s timeout, and open-wire fault detection support ASIL-B functional safety requirements. |
| Low-Power Standby & Hardware Shutdown | 12µA standby current and <1nA hardware shutdown current extend battery life in always-on BMS applications. |
| Kelvin C0-to-V– Connection | Eliminates PCB trace IR drop error on bottom cell measurement - critical for accurate SOC estimation in high-current systems. |
Applications
| Electric Vehicle Battery Packs | Industrial Backup Power Systems |
|---|---|
Use Scenario: Monitoring 12S–96S lithium-ion battery modules in BEV traction packs with thermal runaway prevention. IC Role / Device Role / Timing Role: Primary cell voltage acquisition node in distributed BMS architecture; performs synchronized 13ms full-stack measurements every 100ms. Use Value: Enables precise per-cell SOC/SOH calculation and overvoltage protection within <±2.8mV error - meeting OEM requirements for pack longevity and warranty compliance. | Use Scenario: Supervising telecom or datacenter UPS battery strings where runtime predictability and maintenance scheduling are critical. IC Role / Device Role / Timing Role: Centralized voltage and temperature monitor in modular rack-mounted battery cabinets; interfaces via isolated SPI to system controller. Use Value: Reduces false low-battery alarms by eliminating common-mode noise errors through daisy-chain isolation and 75V stack tolerance. |
| Electric Bicycles & Scooters | High-Power Portable Medical Equipment |
Use Scenario: Compact BMS for 10S–13S LiCoO₂ packs in e-bikes with integrated cell balancing and thermal monitoring. IC Role / Device Role / Timing Role: Single-chip solution handling cell voltage, die temperature, and two external NTC sensors - all in 44-pin SSOP footprint. Use Value: Achieves <13ms measurement cycle and 12µA standby current, extending ride range by minimizing quiescent drain during storage. | Use Scenario: Battery health monitoring in portable defibrillators and infusion pumps requiring medical-grade reliability and low-power operation. IC Role / Device Role / Timing Role: Safety-critical voltage supervisor with watchdog timer and open-wire detection - triggers fail-safe shutdown on communication loss or sensor fault. Use Value: Meets IEC 60601-1 leakage current limits via hardware shutdown mode (<1nA) and built-in self-test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6811IG-1#TRPBF | 3rd-generation 12-channel monitor with improved ±1.5mV measurement error, 2x faster conversion (6.5ms), and enhanced EMI immunity. | Required for new designs targeting ASIL-C or needing tighter voltage tolerance in high-precision LiFePO₄ applications. | Select when upgrading legacy LTC6803-based systems for higher accuracy or faster sampling - not pin-compatible; requires PCB redesign. |
| MAX17853GCM+ | Analog Devices' MAXIM-branded 14-channel monitor with integrated hot-swap controller, 1.25mV error, and AEC-Q100 Grade 1 qualification. | Preferred for automotive OEM programs requiring full AEC-Q100 certification and CAN FD communication interface. | Choose for new automotive platforms demanding certified components and integrated protection features - different pinout and protocol stack. |
Compared with LTC6803IG-1#TRPBF, LTC6811IG-1#TRPBF delivers higher accuracy and speed but requires layout changes, while MAX17853GCM+ adds automotive qualification and CAN FD at the cost of increased complexity and non-drop-in replacement.
Availability
LTC6803IG-1#TRPBF is available at Aetrix Electronics and suitable for electric vehicle battery packs, industrial backup power systems, and high-power portable medical equipment requiring stable component supply across extended production lifecycles.
Supply support for LTC6803IG-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, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for industrial, automotive, communications, and healthcare markets.
The LTC6803 product line was engineered specifically for high-reliability battery management in electric transportation and energy storage - emphasizing stack scalability, functional safety, and low-power operation in harsh environments.
FAQ
What is the maximum number of cells that LTC6803IG-1#TRPBF can monitor in a single device?
LTC6803IG-1#TRPBF monitors up to 12 series-connected battery cells or supercapacitors per IC. Multiple LTC6803IG-1#TRPBF devices can be daisy-chained to monitor longer stacks - for example, eight devices monitor 96 cells. The architecture uses level-shifted serial communication, eliminating optocouplers or isolators in multi-IC configurations.
Does LTC6803IG-1#TRPBF support passive cell balancing, and how is it implemented?
Yes, LTC6803IG-1#TRPBF supports passive cell balancing via 12 dedicated Sx pins (S1–S12), each integrating a 20Ω NMOS switch. These switches are controlled exclusively by host processor commands - no autonomous balancing logic exists. The IC also provides pull-up PMOS on Sx pins to drive external high-power balancing FETs when higher discharge current is needed.
What is the purpose of the VMODE pin on LTC6803IG-1#TRPBF, and how should it be configured?
The VMODE pin configures the serial interface mode: tie VMODE to VREG for voltage-mode (TTL-level) operation with SDO, SDI, SCKI, and CSBI active - used when interfacing directly with a microcontroller. Tie VMODE to V– for current-mode operation, disabling SDO and enabling daisy-chain communication via SDOI/SCKO/CSBO - required for inter-device links in stacked architectures.
How does LTC6803IG-1#TRPBF achieve functional safety compliance for automotive applications?
LTC6803IG-1#TRPBF supports ISO26262-compliant system design through built-in self-tests, watchdog timer (1–2.5s timeout), open-wire fault detection on all cell inputs, and hardware shutdown mode (<1nA). While not ASIL-certified itself, its architecture enables ASIL-B decomposition in distributed BMS implementations when combined with appropriate system-level diagnostics and redundancy.
What is the difference between LTC6803IG-1#TRPBF and LTC6803IG-3#TRPBF?
LTC6803IG-1#TRPBF internally connects C0 to V–, enabling direct replacement of LTC6802‑1 with identical pinout and wiring. LTC6803IG-3#TRPBF separates C0 and V–, providing Kelvin sensing for improved C1 measurement accuracy and enhanced noise immunity - requiring modified PCB layout and cabling but delivering superior bottom-cell voltage fidelity in high-noise environments.
LTC6803IG-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 44-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:
- Serial
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SSOP
LTC6803IG-1#TRPBF FAQ
1.How can I place an order for LTC6803IG-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6803IG-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 LTC6803IG-1#TRPBF reliable?
The price and inventory of LTC6803IG-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 LTC6803IG-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6803IG-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6803IG-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6803IG-1#TRPBF?
LTC6803IG-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6803IG-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 LTC6803IG-1#TRPBF?
For technical support, including LTC6803IG-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6803IG-1#TRPBF requirements.
6.How does Aetrix verify that LTC6803IG-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6803IG-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 LTC6803IG-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6803IG-1#TRPBF?
All LTC6803IG-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6803IG-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 LTC6803IG-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC6803IG-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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