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Analog Devices Inc. LTC6804HG-1#3ZZPBF
- Part No.:
- LTC6804HG-1#3ZZPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 48-FSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC6804HG-1#3ZZPBF.pdf
- Description:
- IC BATT MON MULTI 1-12C 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,411
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Product details
Overview
LTC6804HG-1#3ZZPBF from Analog Devices (formerly Linear Technology) is a third-generation 12-cell battery stack monitor IC designed for high-reliability automotive and industrial battery management systems. It achieves ≤1.2mV total measurement error across –40°C to +125°C, captures all 12 cell voltages in 290µs, and supports daisy-chained isoSPI communication up to 1Mbps for high-voltage battery strings in electric vehicles and grid storage.
For engineers reviewing the LTC6804HG-1#3ZZPBF datasheet, LTC6804HG-1#3ZZPBF pinout, LTC6804HG-1#3ZZPBF application, or LTC6804HG-1#3ZZPBF equivalent, key selection criteria include its H-grade temperature range (–40°C to +125°C), 48-lead SSOP package, passive balancing capability per cell, 5V onboard regulator, and isoSPI interface configuration for daisy-chain topology.
Technical Context
The LTC6804HG-1#3ZZPBF implements a 16-bit delta-sigma ADC with frequency-programmable 3rd-order noise filtering, supporting Normal (290µs), Filtered (201ms), and Fast (1.1ms) acquisition modes. Its isoSPI interface operates at 1Mbps over a single twisted pair up to 100 meters, with RF-immune differential signaling and programmable bias current via RBIAS.
It integrates five general-purpose I/O pins configurable as analog inputs (for temperature sensors), digital I/O, or I²C/SPI master interfaces. The device features synchronized voltage/current measurement support, watchdog timer, software discharge control, and internal thermal shutdown at 150°C - engineered specifically for ISO 26262-compliant BMS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | Measures up to 12 series-connected battery cells (0V–5V per cell), enabling direct monitoring of common EV and ESS stacks without external multiplexing. |
| Total Measurement Error | ≤±1.2mV in Normal mode at 25°C; ≤±2.2mV over full –40°C to +125°C range - ensures accurate state-of-charge estimation under extreme thermal conditions. |
| Acquisition Time | 290µs for full 12-cell measurement in Normal mode; enables rapid BMS response for fault detection and balancing decisions. |
| isoSPI Data Rate | 1Mbps isolated serial interface with daisy-chain capability - eliminates galvanic isolation components and reduces PCB complexity in multi-module systems. |
| Sleep Current | 4µA typical supply current in SLEEP state - extends standby runtime in always-on battery backup and remote energy storage applications. |
| Operating Temp | –40°C to +125°C junction temperature range - qualified for under-hood automotive, traction battery, and industrial high-temp environments. |
| Package | 48-lead plastic SSOP (G package) - surface-mount compatible with standard reflow profiles and provides thermal performance suitable for high-power BMS layouts. |
Pinout & Package
Package: 48-lead plastic SSOP (G package), 0.25mm pitch, exposed pad not present. Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | High-side supply input | Accepts 11V–55V stack voltage; powers internal circuitry directly from battery string - no external DC/DC required for basic operation. |
| C0–C12 | Cell voltage inputs | Differential inputs measuring voltage between adjacent cells (Cn–Cn−1); C0 tied to V–, C12 referenced to V+ - supports up to 12-cell monitoring with ±8V inter-cell tolerance. |
| S1–S12 | Cell balancing switch outputs | Drives internal MOSFETs for passive balancing; each connects to external resistor between S(n) and C(n) - enables per-cell energy equalization during charge cycles. |
| ISOMD | isoSPI mode select | Configures interface: tied to V– for daisy-chain (LTC6804-1), tied to VREG for parallel addressable (LTC6804-2) - determines system topology architecture. |
| VREG | Onboard 5V regulator output | Supplies 5V ±0.25% at up to 12.3mA; powers internal logic and external peripherals - reduces bill-of-materials by eliminating discrete LDO. |
| GPIO1–GPIO5 | General-purpose I/O | Configurable as analog inputs (0–5V), digital I/O, or I²C/SPI master - enables integration of thermistors, status LEDs, or auxiliary sensors without extra ICs. |
Key Features
| Feature | Design Value |
|---|---|
| isoSPI daisy-chain interface | Enables scalable monitoring of 100+ cells using one host processor connection and single twisted-pair wiring - cuts harness cost and EMI susceptibility in large battery packs. |
| Programmable noise filtering | Three ADC modes (Fast/Normal/Filtered) let designers trade speed vs. resolution: 290µs @ ±1.2mV or 201ms @ ±1.2mV - adapts to noisy electrical environments like motor drives or inverters. |
| Passive balancing control | Internal MOSFETs with 10Ω–25Ω ON resistance allow precise per-cell discharge timing via software-configurable timers - avoids external FETs and gate drivers in compact BMS designs. |
| Integrated 5V regulator | Delivers regulated 5V output with ±0.25% accuracy and <1mV/V supply rejection - powers MCU, isolators, or sensors while maintaining measurement integrity under varying stack voltage. |
| ISO 26262 readiness | Built-in diagnostics including open-wire detection, CRC checksums, watchdog timer, and reference voltage monitoring - supports ASIL-B functional safety requirements without external safety monitors. |
Applications
| Electric Vehicle Traction Battery | Grid-Scale Energy Storage |
|---|---|
Use Scenario: Real-time monitoring of 12S–24S lithium-ion modules in EV powertrain battery packs. IC Role / Device Role / Timing Role: Primary cell voltage and temperature monitor; synchronizes measurements across modules via isoSPI daisy chain for SOC/SOH calculation. Use Value: ≤1.2mV measurement error ensures <0.02% SOC uncertainty at 4.2V/cell - critical for range prediction and thermal runaway prevention. | Use Scenario: Supervisory control of 48V–1500V battery strings in utility-scale solar+storage installations. IC Role / Device Role / Timing Role: Stack monitor in distributed BMS architecture; communicates over 100m twisted-pair cables to central controller with immunity to grid-level EMI. Use Value: 1Mbps isoSPI enables sub-millisecond inter-module synchronization - essential for coordinated active balancing and fault propagation across multi-MWh systems. |
| Industrial Backup Power Systems | High-Power Portable Equipment |
Use Scenario: Monitoring sealed lead-acid or LiFePO₄ banks in telecom base stations and UPS systems operating at –40°C to +70°C ambient. IC Role / Device Role / Timing Role: Low-power battery health monitor; enters 4µA sleep mode during standby and wakes on host command or voltage threshold. Use Value: H-grade temperature rating (–40°C to +125°C) guarantees operation in uncontrolled enclosures - eliminates need for heater-cooler subsystems. | Use Scenario: Cell supervision in cordless power tools, medical defibrillators, and portable test equipment requiring fast transient response. IC Role / Device Role / Timing Role: High-speed voltage acquisition IC; uses Fast Mode (1.1ms for 12 cells) to capture voltage sag during motor startup or load dump events. Use Value: 290µs Normal Mode acquisition allows >3kHz sampling rate - enables real-time impedance tracking and dynamic load compensation algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multicell battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8452ACPZ-R7 | Integrated precision op-amp front-end and PWM controller for active balancing; lacks isoSPI, uses SPI only; 8-channel max; no integrated regulator. | Targeted at lower-cell-count, active-balancing systems where galvanic isolation is handled externally. | Select AD8452ACPZ-R7 when active balancing and analog signal conditioning are prioritized over daisy-chain scalability and integrated power. |
| BQ76952PWPR | TI's 16-cell monitor with integrated LDO, I²C/SPI, but no isoSPI; supports higher cell count; lower TME (±1mV); different pinout and register map. | Designed for consumer/portable BMS where cost and footprint are constrained, and isolation is implemented at system level. | Select BQ76952PWPR for higher cell density (16 cells) and lower-cost production, accepting trade-offs in noise immunity and long-cable reliability. |
Compared with AD8452ACPZ-R7 and BQ76952PWPR, the LTC6804HG-1#3ZZPBF uniquely combines H-grade temperature operation, isoSPI daisy-chain scalability, and integrated 5V regulation - making it optimal for automotive and industrial high-voltage battery systems demanding robustness, modularity, and minimal external components.
Availability
LTC6804HG-1#3ZZPBF is available at Aetrix Electronics and suitable for electric vehicle traction batteries, grid-scale energy storage systems, and industrial backup power applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC6804HG-1#3ZZPBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC6804HG-1#3ZZPBF belongs to the Linear Technology Battery Management IC product line, engineered specifically for functional safety-compliant, high-accuracy, high-voltage battery stack monitoring in automotive, industrial, and renewable energy applications.
FAQ
What is the maximum operating temperature specification for the LTC6804HG-1#3ZZPBF?
The LTC6804HG-1#3ZZPBF is rated for operation from –40°C to +125°C ambient temperature, with a maximum junction temperature of 150°C. This H-grade qualification makes it suitable for under-hood automotive applications and high-temperature industrial environments where standard I-grade parts (–40°C to +85°C) would fail.
Does the LTC6804HG-1#3ZZPBF support daisy-chain configuration?
Yes, the LTC6804HG-1#3ZZPBF supports daisy-chain topology via its isoSPI interface when ISOMD is tied to V–. In this LTC6804-1 mode, multiple devices communicate over a single twisted-pair bus with 1Mbps data rate and automatic node addressing - enabling scalable monitoring of hundreds of cells with one host connection.
What is the total measurement error of the LTC6804HG-1#3ZZPBF across temperature?
The LTC6804HG-1#3ZZPBF guarantees ≤±1.2mV total measurement error in Normal mode over the full –40°C to +125°C operating range, as confirmed in the datasheet's Typical Performance Characteristics (Figure G01). This specification applies to cell-to-cell differential measurements at 3.3V input and ensures consistent accuracy in demanding thermal environments.
Can the LTC6804HG-1#3ZZPBF perform passive cell balancing?
Yes, the LTC6804HG-1#3ZZPBF integrates internal MOSFETs on each S(n) pin with 10Ω–25Ω ON resistance, enabling programmable passive balancing per cell. Balancing duration and timing are controlled via software registers, and external resistors connect between S(n) and C(n) to set discharge current - eliminating need for external FETs in most implementations.
What package type and pin count does the LTC6804HG-1#3ZZPBF use?
The LTC6804HG-1#3ZZPBF uses a 48-lead plastic SSOP (G package) with 0.25mm pitch. This surface-mount package is RoHS-compliant (PBF suffix), supports standard reflow soldering, and provides adequate thermal dissipation (θJA = 55°C/W) for continuous operation in high-power BMS applications.
LTC6804HG-1#3ZZPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-FSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
LTC6804HG-1#3ZZPBF FAQ
1.How can I place an order for LTC6804HG-1#3ZZPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6804HG-1#3ZZPBF 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 LTC6804HG-1#3ZZPBF reliable?
The price and inventory of LTC6804HG-1#3ZZPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6804HG-1#3ZZPBF is usually 5 days.
3.What payment methods are accepted for LTC6804HG-1#3ZZPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6804HG-1#3ZZPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6804HG-1#3ZZPBF?
LTC6804HG-1#3ZZPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6804HG-1#3ZZPBF 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 LTC6804HG-1#3ZZPBF?
For technical support, including LTC6804HG-1#3ZZPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6804HG-1#3ZZPBF requirements.
6.How does Aetrix verify that LTC6804HG-1#3ZZPBF is sourced from the original manufacturer or authorized distributors?
All LTC6804HG-1#3ZZPBF 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 LTC6804HG-1#3ZZPBF meets industry standards.
7.What is the process for return or replacement of LTC6804HG-1#3ZZPBF?
All LTC6804HG-1#3ZZPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6804HG-1#3ZZPBF, 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 LTC6804HG-1#3ZZPBF part is unused and in its original packaging.
Return procedure for LTC6804HG-1#3ZZPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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