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Analog Devices Inc. LTC6803HG-4#TRPBF
- Part No.:
- LTC6803HG-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 44-FSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6803HG-4#TRPBF.pdf
- Description:
- IC BATT MON MULTI 1-12C 44SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,862
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Product details
Overview
LTC6803HG-4#TRPBF from Analog Devices (formerly Linear Technology) is a high-temperature, 12-cell battery monitor IC with integrated delta-sigma ADC, precision 3.065V reference, passive cell balancing MOSFETs, and individually addressable SPI interface. It supports up to 16 daisy-chained devices, achieves ±2.8 mV total measurement error at 3.6V, operates from –40°C to 125°C, and delivers 13 ms full-stack conversion - used in electric vehicle battery management systems requiring ISO 26262 compliance.
For engineers reviewing the LTC6803HG-4#TRPBF datasheet, LTC6803HG-4#TRPBF pinout, LTC6803HG-4#TRPBF application, or LTC6803HG-4#TRPBF equivalent, key selection criteria include its Kelvin-connected C0 input for improved Cell 1 accuracy, 20 Ω internal discharge FET on-resistance, 12 µA standby current, 44-lead SSOP package, and support for supercapacitor/fuel cell stacks with negative voltage tolerance.
Technical Context
The LTC6803HG-4#TRPBF implements a 12-bit delta-sigma ADC with built-in noise filtering and 8 ppm/°C reference drift, enabling 0.25% maximum total measurement error across –40°C to 125°C. Its multiplexer architecture sequentially samples C0–C12 with programmable conversion duty cycle (CDC = 1–7), supporting continuous or periodic measurement modes.
It features isolated serial communication via SPI-compatible SDO/SDI/SCKI/CSBI pins, 4-bit hardware address (A0–A3), open-drain WDTB output with 1–2.5 s timeout, and dual thermistor inputs (VTEMP1/VTEMP2) referenced to VREF. The C0–V– Kelvin separation eliminates PCB trace IR drop impact on bottom-cell measurement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Measurement Error | ±2.8 mV at 3.6V (LTC6803HG grade); enables <±0.1% cell voltage accuracy for 3.6V Li-ion cells over full temp range |
| Conversion Time | 13 ms for all 12 cells; ensures rapid BMS response during fast transients or fault conditions |
| Supply Current (Standby) | 12 µA at V+ = 44V; reduces quiescent power in always-on battery monitoring applications |
| Discharge FET RDS(on) | 20 Ω max at VCELL > 3V; sets minimum external balancing resistor value for thermal safety |
| Operating Temperature | –40°C to +125°C (H-grade); qualified for under-hood EV battery pack environments |
| Common Mode Range | C0–C1: 0–5 V; C2–C11: 1.8–5×n V; supports stacked configurations up to 75V total supply |
| Reference Voltage | 3.065 V ±0.045 V; low-drift (8 ppm/°C) reference enables stable ADC performance without calibration |
Pinout & Package
Package: 44-lead plastic SSOP (G package), 0.209" width, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C0 (Pin 26) | Bottom cell negative terminal input | Kelvin connection separates sensing from power return path - eliminates PCB trace resistance error on Cell 1 measurement |
| V– (Pin 27) | Negative supply reference | Independent of C0; provides clean ground reference for internal circuitry and thermistor measurements |
| C1–C12 (Pins 24,22,20,18,16,14,12,10,8,6,4,2) | Cell voltage inputs | High-impedance inputs (±10 µA bias) with open-wire detection; support up to 5 V per cell |
| S1–S12 (Pins 25,23,21,19,17,15,13,11,9,7,5,3) | Cell balancing switch outputs | Integrated N-channel MOSFETs (20 Ω RDS(on)) drive external balancing resistors; also support gate drive for external FETs |
| VREF (Pin 31) | Precision voltage reference output | 3.065 V ±0.045 V, 100 kΩ load capability; used as ADC reference and thermistor bias source |
| SDO/SDI/SCKI/CSBI (Pins 43,42,41,44) | SPI-compatible serial interface | 4-wire interface with packet error checking; supports daisy-chain or individually addressed multi-IC configurations |
| A0–A3 (Pins 37–40) | Hardware address inputs | Binary-encoded address (0–15) allows up to 16 LTC6803HG-4#TRPBF devices on one SPI bus without software arbitration |
| WDTB (Pin 34) | Watchdog timer output | Open-drain active-low signal resets config register if host fails to issue valid command within 1–2.5 s |
Key Features
| Feature | Design Value |
|---|---|
| Kelvin-connected C0 input | Eliminates voltage drop error in V– trace, improving Cell 1 measurement accuracy by >50% vs non-Kelvin topologies |
| Delta-sigma ADC with noise filter | Rejects >72 dB of common-mode noise at 1 kHz - critical for EMI-heavy automotive battery environments |
| Open-wire detection | Uses 110 µA test current to detect broken cell connections before system startup, preventing false OV/UV alarms |
| ISO 26262 functional safety support | Built-in self-tests (BST), CRC-protected registers, and watchdog timer enable ASIL-B compliant BMS designs |
| Hardware shutdown mode | Draws <1 nA from battery stack when V+ disconnected - enables zero-current storage for long-term backup systems |
Applications
| Electric Vehicle Battery Packs | Industrial Backup Power Systems |
|---|---|
Use Scenario: Monitoring 96-cell LiNiMnCoO₂ traction battery in BEV powertrain with isolated DC/DC supplies per module. IC Role / Device Role / Timing Role: Primary cell voltage acquisition IC; performs synchronized 13 ms full-stack conversions triggered by MCU every 100 ms. Use Value: C0–V– Kelvin separation ensures <±3 mV Cell 1 accuracy despite 100 mΩ interconnect resistance; enables precise state-of-charge estimation. |
Use Scenario: 48 V telecom backup battery with 12-series lead-acid cells deployed in outdoor cabinets (-40°C to +70°C ambient). IC Role / Device Role / Timing Role: Standalone BMS sensor node; operates in 500 ms periodic measurement mode with 12 µA standby current. Use Value: H-grade temperature rating (–40°C to +125°C) guarantees operation at die temperature >105°C during summer peak loads. |
| Fuel Cell Stack Monitoring | High-Power Portable Tools |
Use Scenario: 24-cell PEM fuel cell stack where individual cell voltages dip to –0.2 V during purge cycles. IC Role / Device Role / Timing Role: Cell voltage monitor with extended negative input range; uses C0 input to sense true anode potential. Use Value: C0 pin accepts –0.3 V relative to V–, enabling safe measurement of fuel cell reversal without external level-shifting. |
Use Scenario: Cordless 60 V battery pack for professional power tools with active balancing during charge termination. IC Role / Device Role / Timing Role: Balancing controller; drives internal 20 Ω FETs to dissipate 150 mW per cell during 3 A charge current. Use Value: On-die thermal shutdown (145°C) and die temperature measurement prevent FET thermal runaway during sustained high-current balancing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6813IG-1#TRPBF | 3rd-generation 18-cell monitor; higher resolution (16-bit), lower measurement error (±1.5 mV), but no integrated balancing FETs | Requires external balancing circuitry; better suited for high-accuracy, low-power applications without space for discrete FETs | Select when >12-cell coverage or sub-mV accuracy is required and board area permits external MOSFET layout |
| MAX17853GCM+ | 14-channel AEC-Q100 Grade 1 device; includes embedded microcontroller, CAN interface, and enhanced diagnostics | Self-contained BMS node with firmware-upgradable functionality; targets ASIL-C automotive systems needing functional safety beyond hardware checks | Select when CAN bus integration, embedded processing, or ISO 26262 ASIL-C certification is mandatory |
Compared with LTC6803HG-4#TRPBF, LTC6813IG-1#TRPBF offers higher channel count and precision but adds system complexity via external balancing, while MAX17853GCM+ integrates communications and safety logic at the cost of higher BOM and validation effort - making LTC6803HG-4#TRPBF optimal for cost-sensitive, thermally demanding, discrete-balancing BMS designs.
Availability
LTC6803HG-4#TRPBF is available at Aetrix Electronics and suitable for electric vehicle battery packs, industrial backup power systems, fuel cell stack monitoring, and high-power portable tools requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6803HG-4#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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6803HG-4#TRPBF belongs to ADI's Linear Technology battery monitoring product line, engineered specifically for high-reliability, high-temperature battery management in electric vehicles and mission-critical energy storage systems.
FAQ
What is the key functional difference between LTC6803HG-4#TRPBF and LTC6803HG-2#TRPBF?
The LTC6803HG-4#TRPBF features a dedicated C0 pin for Kelvin connection to the bottom cell's negative terminal, separating it from the V– supply reference. In contrast, the LTC6803HG-2#TRPBF internally connects C0 to V–. This architectural difference improves Cell 1 measurement accuracy by eliminating PCB trace resistance error and enhances noise immunity in high-EMI environments - critical for precision BMS applications.
Does LTC6803HG-4#TRPBF support supercapacitor monitoring?
Yes, LTC6803HG-4#TRPBF supports supercapacitor monitoring. Its C0 input accepts voltages down to –0.3 V relative to V–, enabling accurate measurement of supercapacitor cells that may exhibit near-zero or slightly negative voltages during deep discharge. Combined with its 0–5 V input range for C0/C1 and 1.8–5×n V range for upper cells, it accommodates wide-voltage-range energy storage devices without external signal conditioning.
What is the maximum number of LTC6803HG-4#TRPBF devices that can be daisy-chained on a single SPI bus?
Up to 16 LTC6803HG-4#TRPBF devices can be connected to a single SPI bus using individual addressing via the A0–A3 pins. Each device is assigned a unique 4-bit hardware address (0–15), allowing independent read/write access without daisy-chain timing constraints or opto-isolator latency - unlike legacy daisy-chain-only architectures.
How does the open-wire detection feature work in LTC6803HG-4#TRPBF?
The LTC6803HG-4#TRPBF performs open-wire detection by sourcing 110 µA from each cell input (Cn) into the adjacent input (Cn–1) during initialization. It measures the resulting voltage drop across the interconnect; a missing or high-resistance connection yields a deviation beyond threshold, flagging the fault in the status register. This occurs automatically before cell voltage conversion begins.
Can LTC6803HG-4#TRPBF operate without an external microcontroller?
No, LTC6803HG-4#TRPBF cannot operate autonomously. It requires an external host processor to configure registers, initiate conversions, read results, and control balancing FETs via SPI commands. While it includes a watchdog timer and built-in self-tests, all decision-making - including overvoltage/undervoltage response and balancing activation - resides in the host firmware.
LTC6803HG-4#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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SSOP
LTC6803HG-4#TRPBF FAQ
1.How can I place an order for LTC6803HG-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6803HG-4#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 LTC6803HG-4#TRPBF reliable?
The price and inventory of LTC6803HG-4#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6803HG-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6803HG-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6803HG-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6803HG-4#TRPBF?
LTC6803HG-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6803HG-4#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 LTC6803HG-4#TRPBF?
For technical support, including LTC6803HG-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6803HG-4#TRPBF requirements.
6.How does Aetrix verify that LTC6803HG-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6803HG-4#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 LTC6803HG-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6803HG-4#TRPBF?
All LTC6803HG-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6803HG-4#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 LTC6803HG-4#TRPBF part is unused and in its original packaging.
Return procedure for LTC6803HG-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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