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BQ20Z80DBTTI ?N/a100avaiSBS 1.1-Compliant Gas Gauge Enabled with Impedance Track(TM) Technology for Use With the bq29312


BQ20Z80DBT ,SBS 1.1-Compliant Gas Gauge Enabled with Impedance Track(TM) Technology for Use With the bq29312SLUS782–JULY 2007These devices have limited built-in ESD protection. The leads should be shorted to ..
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BQ20Z80DBT
SBS 1.1-Compliant Gas Gauge Enabled with Impedance Track(TM) Technology for Use With the bq29312
www.ti.com
FEATURES
APPLICATIONS
DESCRIPTION
bq20z80
bq20z80A
SLUS782–JULY 2007
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29312A
38-Pin TSSOP (DBT) Patented Impedance Track™ Technology
Accurately Measures Available Chargein
Notebook PCsLi-Ion and Li-Polymer Batteries Medical and Test Equipment Better than 1% Error Over Lifetimeof the Portable InstrumentationBattery Instant Accuracy– No Learning Cycle
Required

The bq20z80 SBS-compliant gas gauge IC,• Supports the Smart Battery Specification SBS
incorporating patented Impedance Track™V1.1
technology,is designed for battery-packor in-system• Works With theTI bq29312A Analog installation. The bq20z80 measures and maintainsFront-End (AFE) ProtectionICto Provide an accurate recordof available chargein Li-ionorComplete Pack Electronics Solution Li-polymer batteries using its integrated• Full Arrayof Programmable Voltage, Current, high-performance analog peripherals. The bq20z80
monitors capacity change, battery impedance,and Temperature Protection Features
open-circuit voltage, and other critical parametersof• Integrated Time Base Removes Need for the battery pack, and reports the informationto theExternal Crystal with Optional Crystal Input system host controller overa serial-communication• Electronics for 7.2-V, 10.8-Vor 14.4-V Battery bus.Itis designedto work with the bq29312A analogPacks With Few External Components front-end (AFE) protection IC to maximize
functionality and safety, and minimize component• Based ona Powerful Low-Power RISC CPU
count and costin smart battery circuits.Core With High-Performance Peripherals Integrated Field Programmable FLASH The Impedance Track technology continuously
analyzes the battery impedance, resultingin superiorMemory Eliminates the Need for External
gas-gauging accuracy. This enables remainingConfiguration Memory capacity to be calculated with discharge rate,• Measures Charge Flow Usinga temperature, and cell agingall accounted for duringHigh-Resolution, 16-Bit Integrating each stageof every cycle.Delta-Sigma Converter Better Than 0.65 nVhof Resolution AVAILABLE OPTIONS Self-Calibrating PACKAGE(1)– Offset Error Less Than1 μV 38-PIN TSSOP (DBT) 38-PIN TSSOP (DBT)
Tube Tape and Reel
Uses 16-Bit Delta-Sigma Converter for
–40°CtoAccurate Voltage and Temperature bq20z80ADBT(2) bq20z80ADBTR(3)
85°CMeasurements –40°Cto bq20z80DBT(2) bq20z80DBTR(3)• Extensive Data Reporting Options For 85°C
Improved System Interaction
Optional Pulse Charging Feature for Improved
Charge Times
Drives3-,4-or 5-Segment LED Display for (1) Forthe most current package and ordering information, seeRemaining Capacity Indication the Package Option Addendumatthe endof this document, seetheTI websiteat www.ti.com.• Supports SHA-1 Authentication
(2)A single tube quantityis50 units.• Lifetime Data Logging (3)A single reel quantityis 2000 units
Pleasebe aware thatan important notice concerning availability, standard warranty, and usein critical applicationsof Texas
Not Recommended For New Designs
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