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AD7280ABSTZ

更新时间： 2024-01-12 17:27:20
品牌 Logo 应用领域
亚德诺 - ADI 电池监控
页数 文件大小 规格书
48页 869K
描述
Lithium Ion Battery Monitoring System Cell balancing interface

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AD7280ABSTZ 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：QFP包装说明：LEAD FREE, MS-026BBC, LQFP-48
针数：48Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.82可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：S-PQFP-G48
长度：9 mm信道数量：6
功能数量：1端子数量：48
最高工作温度：105 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：LFQFP
封装等效代码：QFP48,.35SQ,20封装形状：SQUARE
封装形式：FLATPACK, LOW PROFILE, FINE PITCH电源：7.5/30 V
认证状态：Not Qualified座面最大高度：1.6 mm
子类别：Power Management Circuits最大供电电流 (Isup)：10 mA
最大供电电压 (Vsup)：30 V最小供电电压 (Vsup)：7.5 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：0.5 mm端子位置：QUAD
宽度：9 mmBase Number Matches：1

AD7280ABSTZ 数据手册

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Lithium Ion Battery Monitoring System  
AD7280A  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
12-bit ADC, 1 μs per channel conversion time  
6 analog input channels, common-mode  
range 0.5 V to 27.5 V  
V
DD  
6 auxiliary ADC inputs  
1.6 mV cell voltage accuracy  
On-chip voltage regulator  
Cell balancing interface  
Daisy-chain interface  
Internal reference: 3 ppm/oC  
1.8 μA power-down current  
DAISY-CHAIN  
INTERFACE  
CELL  
BALANCING  
INTERFACE  
VIN6  
VIN5  
VIN4  
VIN3  
VIN2  
VIN1  
VIN0  
HV  
MUX  
V
REGULATOR  
12-BIT ADC  
AD7280A  
REG  
DGND  
DV  
AV  
CC  
CC  
AUX6  
AUX5  
AUX4  
AUX3  
AUX2  
AUX1  
High input impedance  
V
DRIVE  
LV  
MUX  
Serial interface with alert function  
1 SPI interface for up to 48 channels  
CRC protection on read and write commands  
On-chip registers for channel sequencing  
CONTROL LOGIC  
AND SELF-TEST  
CLOCK  
SCLK  
SDI  
SDO  
ALERT  
CS  
PD  
AUX  
TERM  
LIMIT REG  
SQN LOGIC  
DATA MEMORY  
SPI INTERFACE  
V
C
REF  
REF  
2.5V  
REF  
VDD operating range: 8 V to 30 V  
Temperature range: −40°C to +105°C  
48-lead LQFP  
REFGND  
CNVST  
MASTER  
Qualified for automotive applications  
APPLICATIONS  
V
AGND  
SDOlo ALERTlo  
SS  
Lithium ion battery monitoring  
Electric and hybrid electric vehicles  
Power supply backup  
Figure 1.  
Power tools  
GENERAL DESCRIPTION  
The AD7280A1 contains all the functions required for general-  
purpose monitoring of stacked lithium ion batteries as used in  
hybrid electric vehicles, battery backup applications, and power  
tools. The part has multiplexed cell voltage and auxiliary ADC  
measurement channels for up to six cells of battery management.  
An internal 3 ppm/°C reference is provided that allows a cell  
voltage accuracy of 1.ꢀ mꢁ. The ADC resolution is 12 bits and  
allows conversion of up to 48 cells within 7 μs.  
The AD7280A includes on-chip registers that allow a sequence  
of channel measurements to be programmed to suit the application  
requirements.  
The AD7280A also includes a dynamic alert function that can  
detect whether the cell voltages or auxiliary ADC inputs exceed  
an upper or lower limit defined by the user. The AD7280A has  
cell balancing interface outputs designed to control external FET  
transistors to allow discharging of individual cells.  
The AD7280A operates from a single ꢁDD supply that has a  
range of 8 ꢁ to 30 ꢁ (with an absolute maximum rating of  
33 ꢁ). The part provides six differential analog input channels  
to accommodate large common-mode signals across the full  
The AD7280A includes a built-in self-test feature that internally  
applies a known voltage to the ADC inputs.  
A daisy-chain interface allows up to eight parts to be stacked  
without the need for individual device isolation.  
ꢁDD range. Each channel allows an input signal range, ꢁIN(+)  
The AD7280A requires only one supply pin that accepts ꢀ.9 mA  
under normal operation while converting at 1 MSPS.  
− ꢁIN(−), of 1 ꢁ to 5 ꢁ. The input pins assume a series stack of  
six cells. In addition, the part includes six auxiliary ADC input  
channels that can be used for temperature measurement or  
system diagnostics.  
All this functionality is provided in a 48-lead LQFP package  
operating over a temperature range of −40°C to +105°C.  
1 Patents pending.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2011 Analog Devices, Inc. All rights reserved.  
 
 
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