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Analog Devices Inc. LTC6801HG#TRPBF
- Part No.:
- LTC6801HG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6801HG#TRPBF.pdf
- Description:
- IC BATT MON LI-ION 1-12CL 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,726
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Product details
Overview
LTC6801HG#TRPBF from Analog Devices is a high-temperature automotive-grade multicell battery stack fault monitor IC designed for standalone overvoltage, undervoltage, and overtemperature detection in Li-ion battery systems. It monitors up to 12 series-connected cells (60V max), delivers ±1% OV/UV detection level error, supports daisy-chained stackable architecture for >1000V systems, and operates across –40°C to +125°C. It enables microcontroller-free monitoring in hybrid electric vehicles and redundant battery backup systems.
For engineers reviewing the LTC6801HG#TRPBF datasheet, LTC6801HG#TRPBF pinout, LTC6801HG#TRPBF application, or LTC6801HG#TRPBF equivalent, key selection criteria include its 36-lead SSOP package, differential clocking for noise immunity, pin-strapped configuration (OV0/OV1/UV0/UV1/HYST/CC0/CC1), 15.5ms full-cell measurement cycle, and dual temperature input support with VREF/2 threshold.
Technical Context
The LTC6801HG#TRPBF integrates a 12-bit ADC, precision voltage reference (3.058V typ), sampled comparator, and high-voltage multiplexer to perform simultaneous cell voltage and temperature monitoring without host intervention. Its self-test logic guarantees accuracy, and differential EIN/EIN enable inputs ensure robust operation in noisy high-voltage environments.
It uses three-level digital inputs (OV0/OV1/UV0/UV1/HYST/DC/CC0/CC1) tied to VREG/VREF/V– to configure thresholds, hysteresis, cell count (4–12), and duty cycle (15.5ms/130ms/500ms). Status output SOUT/SOUT toggles only when all monitored parameters are within limits - a dynamic "OK" signal that cannot freeze in fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | Configurable for 4–12 series Li-ion cells via CC0/CC1 pins; supports modular battery pack scalability. |
| OV/UV Detection Error | ±1% max over full temp range; ensures reliable cell protection at critical voltage boundaries (e.g., 4.116V OV, 2.106V UV). |
| Operating Temp Range | –40°C to +125°C (H-grade); qualified for under-hood automotive applications and industrial energy storage. |
| Measurement Cycle Time | 15.5ms typical for 12 cells + 2 temps; enables rapid fault response (<30ms worst-case detection delay). |
| VREF Output | 3.058V ±10mV, 8ppm/°C TC; provides stable reference for thermistor-based temperature sensing at VTEMP1/VTEMP2. |
| VREG Output | 5.0V ±0.5V, 1mA drive capability; powers external circuitry (e.g., optocouplers, level shifters) without auxiliary supply. |
| Supply Current (Monitor) | 600–750µA typical at 10kHz enable frequency; balances responsiveness and power efficiency in continuous monitoring mode. |
| Supply Current (Idle) | 20–30µA max at –40°C to +125°C; minimizes parasitic drain during system standby or sleep states. |
Pinout & Package
Package: 36-lead plastic SSOP (G package), 0.025" pitch, JEDEC MO-153 compliant, θJA = 70°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (1) | High-side supply rail | Connected to top of monitored battery stack (e.g., C12 node); supports up to 60V total stack voltage. |
| C12–C1 (2–13) | Cell voltage inputs | Differential inputs for 12-series cell monitoring; internal clamping protects against reverse bias and overvoltage transients. |
| V– (14) | Low-side reference | Connected to bottom of monitored stack (cell negative); serves as common-mode reference for all Cn and temperature inputs. |
| VTEMP1/VTEMP2 (15–16) | Temperature sensor inputs | Measure thermistor divider voltage relative to V–; fixed UV threshold at VREF/2 enables simple thermal fault detection. |
| VREF (17) | Precision reference output | 3.058V ±10mV source for ADC and temperature sensing; requires 1µF bypass to V–; high-impedance in idle mode. |
| VREG (18) | Regulated 5V output | Stable 5V supply for external logic; delivers up to 1mA; remains active continuously if V+ is 10–50V. |
| EIN/EIN (19–20) | Differential enable input | Accepts 2–40kHz square wave; enables monitoring only when valid differential clock is present - prevents false "OK" status. |
| SOUT/SOUT (21–22) | Differential status output | Toggles at EIN frequency only when all cells and temps are within thresholds; fails-safe design asserts low/high on fault. |
| SIN/SIN (23–24) | Differential status input | Receives SOUT/SOUT from upstream device in stacked configuration; enables daisy-chained fault propagation without isolators. |
| EOUT/EOUT (25–26) | Buffered enable output | Capacitively couples EIN/EIN signal to next higher-voltage LTC6801; supports >1000V stack scalability. |
| DC (27) | Duty cycle select | Three-level input (VREG/VREF/V–) sets measurement interval: 15.5ms / ~130ms / ~500ms - optimizes power vs. responsiveness. |
| SLTOK (28) | Self-test logic output | Open-drain output pulled high on successful self-test; goes low on failure - provides hardware-verified functional integrity. |
| SLT (29) | Self-test trigger | Open-collector input/output; pulling low initiates self-test; internal pull-up to VREG enables autonomous 1024-cycle self-test. |
| CC0/CC1 (30–31) | Cell count select | Three-level inputs set monitored cell count (4–12); avoids unused channel noise and reduces measurement overhead. |
| HYST (32) | Hysteresis select | Three-level input configures UV/OV hysteresis (0/250mV/500mV UV, 0/100mV/200mV OV) to prevent chatter near thresholds. |
| UV0/UV1 (33–34) | Undervoltage threshold | Three-level inputs select 9 UV thresholds (0.766V–2.871V); supports diverse Li-ion chemistries and aging compensation. |
| OV0/OV1 (35–36) | Overvoltage threshold | Three-level inputs select 9 OV thresholds (3.733V–4.498V); enables precise cell balancing trigger points. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-strapped configuration | Eliminates need for MCU or programming interface - simplifies BOM and reduces firmware validation burden in safety-critical systems. |
| Differential clock signaling (EIN/SIN/SOUT) | Provides >60dB common-mode noise rejection in high-dV/dt battery environments - prevents false OK assertion due to EMI or ground bounce. |
| Stackable daisy-chain architecture | Enables monitoring of arbitrarily long battery strings using only two signal lines per device - eliminates optocouplers, isolators, and complex level-shifting. |
| Hardware self-test with SLT/SLTOK | Verifies ADC, reference, comparator, and multiplexer functionality at power-up and periodically - meets ASIL-B diagnostic coverage requirements. |
| Programmable response time via DC pin | Allows trade-off between fault detection latency (15.5ms) and quiescent current (20µA idle) - critical for energy-constrained backup systems. |
| Two dedicated temperature inputs | Supports independent thermal monitoring of cell group hotspots using NTC thermistors referenced to VREF - enables localized thermal derating. |
Applications
| Redundant Battery Monitor | Hybrid Electric Vehicle (HEV) Battery Pack |
|---|---|
Use Scenario: Dual independent LTC6801HG#TRPBF units monitor same 12-cell module with cross-checked status outputs. IC Role / Device Role / Timing Role: Standalone fault detector generating fail-safe differential clock output; no software dependency. Use Value: Achieves SIL-2 diagnostic coverage by detecting open-circuit cell leads, clamp diode failures, and reference drift - validated via SLT/SLTOK self-test. | Use Scenario: Single LTC6801HG#TRPBF monitors top 12 cells in a 96-cell HEV traction battery string operating at 400V. IC Role / Device Role / Timing Role: High-voltage stack monitor with daisy-chained SIN/SOUT enabling single-point fault reporting for entire string. Use Value: Enables compliance with ISO 26262 ASIL-C by providing <30ms OV/UV fault detection latency and –40°C to +125°C guaranteed operation. |
| Battery Backup System (UPS) | Industrial Power System Monitoring |
Use Scenario: LTC6801HG#TRPBF supervises 8-series LiFePO₄ cells in telecom backup battery with DC pin tied to V– for 500ms monitoring interval. IC Role / Device Role / Timing Role: Low-power voltage supervisor minimizing standby current while maintaining thermal awareness via VTEMP1/VTEMP2. Use Value: Reduces annual parasitic drain to <1.5mAh per year - extends 10-year battery service life without maintenance cycles. | Use Scenario: Multiple LTC6801HG#TRPBF devices deployed across distributed 48V DC microgrid nodes with shared EIN clock distribution. IC Role / Device Role / Timing Role: Distributed cell health monitor feeding centralized SCADA via SOUT edge-triggered interrupts. Use Value: Provides deterministic 15.5ms cell voltage update rate across 32-node grid - enables predictive failure analytics with <1% measurement error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery stack monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6802IG#TRPBF | Includes SPI interface and individual cell voltage readback; lacks standalone clock-output "OK" indication. | Requires MCU integration and firmware development; suitable where cell-level telemetry is mandatory. | Select LTC6802IG#TRPBF only when voltage digitization and host-controlled diagnostics are required - not for simple pass/fail monitoring. |
| AD8450ASTZ | Analog front-end with integrated ADC, PGA, and reference; requires external µC for control and communication. | Designed for programmable battery test equipment, not embedded safety monitoring. | Choose AD8450ASTZ for lab-grade characterization; LTC6801HG#TRPBF remains optimal for production automotive BMS fault detection. |
Compared with LTC6802IG#TRPBF and AD8450ASTZ, the LTC6801HG#TRPBF uniquely delivers certified automotive-grade standalone fault indication without software - reducing system complexity, validation scope, and time-to-market for safety-critical battery supervision.
Availability
LTC6801HG#TRPBF is available at Aetrix Electronics and suitable for hybrid electric vehicle battery management, redundant UPS monitoring, and industrial energy storage systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC6801HG#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 LTC6801HG#TRPBF belongs to ADI's precision battery monitoring IC family, engineered specifically for fail-safe, microcontroller-free voltage and thermal supervision in high-reliability automotive and industrial battery stacks.
FAQ
What is the maximum battery stack voltage supported by the LTC6801HG#TRPBF?
The LTC6801HG#TRPBF supports a total supply voltage (V+ to V–) of up to 60V per device. When multiple LTC6801HG#TRPBF units are daisy-chained in stacked configuration using differential SIN/SOUT and EIN/EOUT signaling, the system can monitor battery strings exceeding 1000V - limited only by isolation and layout constraints, not by the IC itself.
How does the LTC6801HG#TRPBF indicate a fault condition?
The LTC6801HG#TRPBF indicates a fault by halting the differential clock output: SOUT is driven low and SOUT is driven high. This occurs immediately upon detection of any out-of-threshold condition - including overvoltage, undervoltage, overtemperature (VTEMP1/VTEMP2 < VREF/2), or invalid enable signal - ensuring no "stuck-at-good" failure mode.
Can the LTC6801HG#TRPBF operate without an external microcontroller?
Yes, the LTC6801HG#TRPBF is explicitly designed for microcontroller-free operation. All configuration (OV/UV thresholds, hysteresis, cell count, duty cycle) is performed via pin strapping (OV0/OV1/UV0/UV1/HYST/DC/CC0/CC1), and status is conveyed solely through the differential SOUT/SOUT clock output - eliminating firmware dependencies.
What is the purpose of the SLT and SLTOK pins on the LTC6801HG#TRPBF?
The SLT (Self-Test) pin is an open-collector input/output that initiates a hardware self-test cycle when pulled low; SLTOK (Self-Test OK) is an open-drain output that remains high only after successful completion of that self-test. Together, they provide verifiable functional integrity - a critical requirement for ISO 26262-compliant battery monitoring.
Does the LTC6801HG#TRPBF support temperature monitoring, and how is it implemented?
Yes, the LTC6801HG#TRPBF supports two independent temperature inputs (VTEMP1 and VTEMP2), each compared to a fixed threshold of VREF/2 (~1.53V). When either input falls below this level, it triggers an undervoltage flag - enabling simple, resistor-thermistor networks for hotspot detection without additional ADC resources.
LTC6801HG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 12
- Fault Protection:
- Over Temperature, Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SSOP
LTC6801HG#TRPBF FAQ
1.How can I place an order for LTC6801HG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6801HG#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 LTC6801HG#TRPBF reliable?
The price and inventory of LTC6801HG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6801HG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6801HG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6801HG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6801HG#TRPBF?
LTC6801HG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6801HG#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 LTC6801HG#TRPBF?
For technical support, including LTC6801HG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6801HG#TRPBF requirements.
6.How does Aetrix verify that LTC6801HG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6801HG#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 LTC6801HG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6801HG#TRPBF?
All LTC6801HG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6801HG#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 LTC6801HG#TRPBF part is unused and in its original packaging.
Return procedure for LTC6801HG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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