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参数资料
| 型号： | EVAL-AD7280AEDZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/48页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7280 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电池监控器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | * |
| 主要属性： | * |
| 次要属性： | SPI 接口 |
| 已供物品： | 板 |
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AD7280A
TYPICAL CONNECTION DIAGRAMS
0.1μF
10μF
10k ?
10k ?
10k ?
10k ?
VIN6
CB6
VIN5
V DD
MASTER
V REG
DV CC
AV CC
1μF
0.1μF
0.1μF
10k ?
CB5
V DRIVE
10k ?
VIN4
V REF
1μF
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
CB4
VIN3
CB3
VIN2
CB2
VIN1
CB1
VIN0
AD7280A
V SS
C REF
ALERT
CNVST
PD
SDO
SCLK
SDI
CS
0.1μF
OPTIONAL INTERFACE PINS
DSP/MICRO-
PROCESSOR
4-WIRE SPI INTERFACE
Figure 28. AD7280A Configuration Diagram for Six Battery Cells
The AD7280A can be used to monitor four, five, or six battery
cells connected in series. A typical configuration for a six-cell
battery monitoring application is shown in Figure 28. However,
lithium ion battery applications require a significant number of
shows the recommended configuration of a chain of AD7280As
monitoring a larger battery stack. The daisy-chain interface of the
AD7280A allows each individual AD7280A to communicate with
the AD7280A immediately above and below it. The daisy-chain
interface allows the AD7280As to be electrically connected to
the battery management chip without the need for individual
isolation devices between each AD7280A.
As shown in Figure 29, it is recommended that a Zener diode be
placed across the supplies of each AD7280A. This prevents an
overvoltage across the supplies of each AD7280A during the
initial connection of the daisy chain of AD7280As to the battery
stack. A voltage rating of 30 V is suggested for this Zener diode,
but lower values can also be used to suit the application.
The 10 kΩ resistor in series with the inputs combined with a
100 nF capacitor across the adjacent differential inputs acts as
a low-pass filter. The 10 kΩ resistors provide protection for the
analog inputs in the event of an overvoltage or undervoltage on
those inputs, for example, if any of the cell voltage inputs is
incorrectly shorted to V DD or V SS . The resistors also provide
protection during the initial connection of the daisy chain of
AD7280As to the battery stack. For more information about the
daisy-chain interface, see the Daisy-Chain Interface section.
In an application that includes a safety mechanism designed to
open circuit the battery stack, additional isolation is required
between the AD7280A above the break point and the battery
management chip.
A suggested configuration for the external cell balancing circuit
is shown in Figure 28. This configuration also includes 10 kΩ
resistors in series with the cell balance outputs. These resistors
provide protection for the cell balance outputs in the event of
an overvoltage or undervoltage on those inputs. See the Cell
Rev. 0 | Page 17 of 48
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| EVAL-AD7298SDZ | 功能描述:BOARD EVAL FOR AD7298 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7298SDZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD7192 12BIT ADC |
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