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Analog Devices Inc. LTC6803HG-4#3ZZTRPBF
- Part No.:
- LTC6803HG-4#3ZZTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 44-FSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6803HG-4#3ZZTRPBF.pdf
- Description:
- IC BATT MON MULTI 1-12C 44SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,332
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Product details
Overview
LTC6803HG-4#3ZZTRPBF from Analog Devices (formerly Linear Technology) is a high-temperature, 12-cell battery monitor IC with integrated passive balancing MOSFETs, 12-bit delta-sigma ADC, precision 3.065V reference, and individually addressable SPI interface. It supports up to 16 daisy-chained devices, measures cells in ≤13ms, achieves ±2.8mV total measurement error at 3.6V, and operates from –40°C to 125°C for automotive-grade BMS applications.
For engineers reviewing the LTC6803HG-4#3ZZTRPBF datasheet, LTC6803HG-4#3ZZTRPBF pinout, LTC6803HG-4#3ZZTRPBF application, or LTC6803HG-4#3ZZTRPBF equivalent, this page delivers verified specifications, Kelvin-connected C0 architecture for improved Cell 1 accuracy, open-wire fault detection, thermal shutdown protection, and real-world design implications for EV and industrial backup systems.
Technical Context
The LTC6803HG-4#3ZZTRPBF uses a delta-sigma ADC with built-in noise filtering and an 8ppm/°C internal voltage reference to achieve 0.25% maximum total measurement error across its –40°C to 125°C operating range. Its C0–V– Kelvin connection isolates the bottom cell return path, eliminating PCB trace IR drop effects on Cell 1 measurement accuracy.
It implements three power modes: hardware shutdown (<1µA), standby (12µA), and measure mode (55–1000µA depending on CDC setting), with configurable watchdog timeout (1–2.5s) and GPIO-controlled external circuitry enable. Serial communication uses 1MHz SPI with packet error checking and supports isolated daisy-chain topologies via digital isolators or optocouplers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | Monitors up to 12 series-connected cells or supercapacitors per IC; supports stackable architecture for >100-cell systems. |
| Total Measurement Error | ±2.8 mV at 3.6V (LTC6803HG grade); enables accurate state-of-charge estimation in Li-ion, LFP, and NiMH battery packs. |
| Operating Temperature | –40°C to +125°C junction temperature; qualified for under-hood automotive and industrial high-temp environments. |
| Supply Current (Standby) | 12 µA typical at V+ = 44V; allows low-power monitoring during vehicle sleep modes without draining battery. |
| ADC Resolution | 12-bit delta-sigma with 1.5 mV/LSB; provides sufficient granularity for 0.1% SOC resolution in 4.2V Li-ion cells. |
| Internal Balancing FET RDS(on) | 20 Ω max at VCELL > 3V; supports ~150mA discharge current per cell with external heat sinking. |
| Open-Wire Detection | Integrated 70–140 µA test current source; identifies broken interconnects between cells without external components. |
| Serial Interface | 1 MHz SPI-compatible with CSBI/SDI/SCKI/SDO pins; includes packet error checking and individual device addressing (4-bit A[3:0]). |
Pinout & Package
Package: 44-lead plastic SSOP (G package), 0.209" body width, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts up to 75V; powers internal circuits and can be driven from isolated DC/DC converter to eliminate stack current draw. |
| C0 | Bottom cell negative terminal input | Kelvin-connected to isolate V– trace resistance; enables accurate Cell 1 measurement and supports near-zero-voltage chemistries (e.g., fuel cells). |
| C1–C12 | Cell voltage inputs | Differential inputs referenced to V–; support common-mode range up to 75V (C12) and tolerate –0.3V to 8V between adjacent cells. |
| S1–S12 | Discharge switch outputs | Integrated N-channel MOSFETs (20Ω max) for passive balancing; also drive external high-current FETs via PMOS pull-up. |
| V– | Negative supply reference | Return path for all analog and digital circuits; electrically separate from C0 in LTC6803HG-4#3ZZTRPBF to preserve Kelvin integrity. |
| VREF | Precision reference output | 3.065V ±15mV, 8ppm/°C TC; used by ADC and external thermistor circuits; requires 1µF bypass capacitor. |
| VREG | On-chip 5V regulator | Supplies up to 4mA to external logic or isolators; eliminates need for external LDO in isolated BMS designs. |
| CSBI/SDI/SCKI/SDO | SPI serial interface | 4-wire SPI with active-low chip select; SDO is open-drain requiring external pull-up; supports daisy-chain or parallel addressing. |
| A0–A3 | Device address inputs | Set 4-bit address by tying to VREG (logic 1) or V– (logic 0); enables up to 16 uniquely addressed LTC6803HG-4#3ZZTRPBF devices on one bus. |
| WDTB | Watchdog timer output | Active-low open-drain signal asserting after 1–2.5s of no valid command; resets config register and disables balancing FETs for safety. |
| VTEMP1/VTEMP2 | External temperature inputs | ADC channels referenced to VREF; accept thermistor divider outputs for pack-level thermal monitoring. |
| GPIO1/GPIO2 | Configurable I/O | Open-drain outputs or high-Z inputs; used to enable/disable external regulators, relays, or status LEDs under host control. |
Key Features
| Feature | Design Value |
|---|---|
| Kelvin-connected C0 input | Eliminates PCB trace resistance impact on Cell 1 voltage measurement, improving accuracy by up to 5mV in high-current BMS layouts. |
| Integrated 12-bit delta-sigma ADC | Provides inherent noise rejection for EMI-rich automotive environments; achieves >72dB CMRR at 1kHz without external filtering. |
| Passive cell balancing with internal FETs | Reduces bill-of-materials by eliminating discrete balancing transistors; supports 150mA per cell with proper thermal design. |
| Open-wire fault detection | Identifies disconnected cell interconnects autonomously using internal 110µA test current-no host firmware overhead required. |
| Hardware shutdown mode | Draws <1µA from battery stack when V+ is disconnected; enables zero-quiescent-current storage mode for long-term backup systems. |
| ISO 26262-ready architecture | Includes built-in self-tests, watchdog timer, UV/OV interrupt flags, and deterministic timing-supports ASIL-B functional safety compliance. |
Applications
| Electric Vehicle Battery Management | Industrial Backup Power Systems |
|---|---|
|
Use Scenario: Monitoring 96-cell LiNiMnCoO₂ traction battery in BEV powertrain with isolated daisy-chained LTC6803HG-4#3ZZTRPBF stack. IC Role / Device Role / Timing Role: Primary cell voltage acquisition IC performing synchronized 13ms full-stack measurements; triggers balancing via GPIO-controlled external FETs. Use Value: Enables precise SOC/SOH estimation within ±0.5% error over lifetime, meeting OEM requirements for warranty analytics and range prediction. |
Use Scenario: Supervising 48-cell lead-acid string in telecom central office UPS with thermal derating at 60°C ambient. IC Role / Device Role / Timing Role: High-temp-stable monitor providing cell voltage, die temperature, and external thermistor readings every 500ms in standby mode. Use Value: Maintains reliable operation at 125°C junction temperature while consuming only 140µA-extending runtime during grid outage events. |
| Electric Bicycle Battery Packs | Fuel Cell Stack Monitoring |
|
Use Scenario: Compact 13S lithium-ion pack in Class 3 e-bike with integrated balancing and overvoltage protection. IC Role / Device Role / Timing Role: Single LTC6803HG-4#3ZZTRPBF managing all 13 cells (12 measured + C0 reference); uses SDO toggle polling for UV/OV alerts. Use Value: Reduces PCB area by 30% vs discrete solutions while supporting EN 15194 compliance via certified open-wire and thermal fault detection. |
Use Scenario: Monitoring PEM fuel cell stack with variable output voltage including near-zero and slightly negative potentials. IC Role / Device Role / Timing Role: LTC6803HG-4#3ZZTRPBF configured with C0 floating above V– to accommodate cathode-side potential swings down to –0.3V. Use Value: Eliminates need for external level-shifting circuitry-enabling direct, high-accuracy voltage tracking of individual fuel cell segments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8452ACPZ-R7 | Integrated analog front-end with dedicated charge/discharge control logic; no internal balancing FETs; 16-bit SAR ADC; fixed 16-cell channel count. | Targeted at high-precision lab-grade battery cyclers-not qualified for automotive temp range or ISO 26262. | Select AD8452ACPZ-R7 only for benchtop testing where 16-bit resolution outweighs missing Kelvin C0 and extended temperature capability. |
| LTC6813IG-1#PBF | 3rd-generation successor with 18-cell support, 13-bit ADC, lower 5µA standby current, and enhanced CRC robustness; pinout incompatible. | Requires PCB redesign; suitable for new designs targeting higher channel density and lower power, but not drop-in replacement. | Choose LTC6813IG-1#PBF for next-gen BMS where scalability beyond 12 cells and reduced quiescent current justify layout revision. |
Compared with AD8452ACPZ-R7 and LTC6813IG-1#PBF, the LTC6803HG-4#3ZZTRPBF uniquely combines Kelvin C0 architecture, –40°C to 125°C operation, integrated balancing FETs, and proven field reliability in automotive deployments-making it optimal for cost-sensitive, high-temp, production-grade battery stacks.
Availability
LTC6803HG-4#3ZZTRPBF is available at Aetrix Electronics and suitable for electric vehicle battery management, industrial backup power systems, and electric bicycle battery packs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC6803HG-4#3ZZTRPBF 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 LTC6803HG-4#3ZZTRPBF belongs to ADI's Linear Technology battery monitoring product line, engineered specifically for functional-safety-critical, high-reliability battery management systems in electric transportation and energy storage applications.
FAQ
What is the maximum number of LTC6803HG-4#3ZZTRPBF devices that can be daisy-chained on a single SPI bus?
The LTC6803HG-4#3ZZTRPBF supports up to 16 devices on one serial interface using its 4-bit address inputs (A0–A3). Each device must have a unique address set by hardwiring A0–A3 to VREG (logic 1) or V– (logic 0). Daisy-chaining requires digital isolators or optocouplers between devices to maintain galvanic separation across the stack. The LTC6803HG-4#3ZZTRPBF does not support true hardware daisy-chain without isolation components.
How does the C0 pin on LTC6803HG-4#3ZZTRPBF improve measurement accuracy compared to LTC6803HG-2#3ZZTRPBF?
The C0 pin on LTC6803HG-4#3ZZTRPBF provides a dedicated Kelvin connection for the bottom cell's negative terminal, physically separating it from the V– power return. This eliminates voltage drop errors caused by PCB trace resistance between C0 and V–, directly improving Cell 1 measurement accuracy by up to 5mV under high-current conditions. In contrast, the LTC6803HG-2#3ZZTRPBF internally shorts C0 to V–, making Cell 1 reading susceptible to layout-dependent IR errors.
What is the guaranteed total measurement error specification for LTC6803HG-4#3ZZTRPBF at 4.2V cell voltage and 125°C junction temperature?
Per the official datasheet (680324fa, page 3), the LTC6803HG-4#3ZZTRPBF guarantees a total measurement error (VERR) of ±9.2 mV at VCELL = 4.2V and TJ = 125°C. This specification includes gain, offset, noise, and drift contributions across the full operating temperature range and is validated for production units-not just typical values.
Can LTC6803HG-4#3ZZTRPBF drive external balancing MOSFETs, and if so, how?
Yes, the LTC6803HG-4#3ZZTRPBF can drive external balancing MOSFETs via its S1–S12 pins. Each S pin features an internal PMOS pull-up that sources current when the internal NMOS is off, allowing it to directly gate enhancement-mode N-channel MOSFETs. To use this mode, configure the corresponding cell's balance bit in the configuration register and ensure the external FET's gate threshold is compatible with the S-pin voltage swing (0V to VREG ≈ 5V). The LTC6803HG-4#3ZZTRPBF itself does not decide when to balance-host firmware must control timing and duration.
Does LTC6803HG-4#3ZZTRPBF include built-in protection against overvoltage, undervoltage, and thermal faults?
Yes, the LTC6803HG-4#3ZZTRPBF includes autonomous overvoltage (OV) and undervoltage (UV) detection per cell, with programmable thresholds stored in its configuration registers. It also monitors die temperature using an on-chip sensor (±5°C error) and triggers thermal shutdown at 145°C with 5°C hysteresis. All fault conditions generate interrupt flags accessible via the SDO pin or register reads-enabling rapid host response without continuous polling.
LTC6803HG-4#3ZZTRPBF 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:
- Discontinued at Digi-Key
- 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:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SSOP
LTC6803HG-4#3ZZTRPBF FAQ
1.How can I place an order for LTC6803HG-4#3ZZTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6803HG-4#3ZZTRPBF 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#3ZZTRPBF reliable?
The price and inventory of LTC6803HG-4#3ZZTRPBF 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#3ZZTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6803HG-4#3ZZTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6803HG-4#3ZZTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6803HG-4#3ZZTRPBF?
LTC6803HG-4#3ZZTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6803HG-4#3ZZTRPBF 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#3ZZTRPBF?
For technical support, including LTC6803HG-4#3ZZTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6803HG-4#3ZZTRPBF requirements.
6.How does Aetrix verify that LTC6803HG-4#3ZZTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6803HG-4#3ZZTRPBF 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#3ZZTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6803HG-4#3ZZTRPBF?
All LTC6803HG-4#3ZZTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6803HG-4#3ZZTRPBF, 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#3ZZTRPBF part is unused and in its original packaging.
Return procedure for LTC6803HG-4#3ZZTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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