The bq20z90 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z90 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z90 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and reports the information to the system host controller over a serial-communication bus. It is designed to work with the bq29330 analog front-end (AFE) protection IC to maximize functionality and safety, and minimize component count and cost in smart battery circuits.

The Impedance Track technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle.

• Patented Impedance Track? Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
• Better than 1% Error Over Lifetime of the Battery
• Instant Accuracy — No Learning Cycle Required
• Automatically adjusts for battery aging, battery self discharge and temperature inefficiencies
• Supports the Smart Battery Specification SBS V1.1
• Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
• Full Array of Programmable Voltage, Current, and Temperature Protection Features
• Integrated Time Base Removes Need for External Crystal with Optional Crystal Input
• Electronics for 7.2-V, 10.8-V or 14.4-V Battery Packs With 50% Fewer External Components
• Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
• Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
• Measures Charge Flow Using a High-Resolution, 16-Bit Integrating Delta-Sigma Converter
  • Better Than 0.65 nVh of Resolution
  • Self-Calibrating
• Uses 16-Bit Delta-Sigma Converter for Accurate Voltage and Temperature Measurements
• Extensive Data Reporting Options For Improved System Interaction
• Optional Pulse Charging Feature for Improved Charge Times
• Drives 3-, 4- or 5-Segment LED Display for Remaining Capacity Indication
• Supports SHA-1 Authentication
• Lifetime Data Logging
• 30-Pin TSSOP (DBT)
• APPLICATIONS
  • Notebook PCs
  • Medical and Test Equipment
  • Portable Instrumentation

IMPEDANCE TRACK is a trademark of Texas Instruments.

• Cell chemistry
• Li-Ion/Li-Polymer
• Number of series cells
• 2-4 Cells
• Communication interface
• SMBus
• Battery capacity (Min) (mAh)
• 800
• Battery capacity (Max) (mAh)
• 15000
• Implementation
• Pack
• External capacity indication
• LED
• Features
• Impedance Track? algorithm, SHA-1 Authentication
• Operating temperature range (C)
• -40 to 85
• Cell balancing
• Internal

BQ20Z90的完整型号有：BQ20Z90DBT，以下是这些产品的关键参数及官网采购报价：

BQ20Z90DBT，工作温度：-40 to 85，封装：TSSOP (DBT)-30，包装数量MPQ：60个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ20Z90DBT的批量USD价格：5.049（1000+）

ADVANCED-BQMTESTER — 德州仪器 (TI) 高级 bqMTester 多站测试和程序板

德州仪器 (TI) 高级 bqMTester 多站测试和程序板可根据最新德州仪器高级电池电量监测计（bq306x、bq28xxx、Impedance Track&#8482 器件 bq20z4x、bq20z6x、bq20z7x、bq20z80 和 bq20z9x）对电子智能电池模块进行校准和编程。bqMTester 环境可支持校准板多达 12 个的单个计算机，每个板与 EV2x00 通信板相连。

BQMTESTER — BQMTESTER 多通道测试和程序板

The bqMTester from Texas Instruments is designed to calibrate and program electronic smart battery modules based on the bq20zxx and bq30zxx family of devices utilizing the patented Impedance Track ™ technology. The bqMTester software works in conjunction with the bqMTester HPA169 calibration board (...)

MKST-3P-ALT-EV2300 — EV2300 alternative for use with BQMTESTER and ADVANCED-BQMTESTER

该解决方案由 MKS Technology 提供，是 EV2300 通信收发器的替代产品。该解决方案由 MKS Technology 提供并已通过验证，可与 BQMTESTER 和 ADVANCED-BQMTESTER 配合使用。借助 MKS Technology 的该款收发器，您可以通过 PC USB 端口与 I2C、SMBus 和 HDQ 产品通信。