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参数资料
| 型号： | EVAL-AD7280AEDZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 45/48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
If a second convert start signal is received by the AD7280A while
the conversion results are being read back, the data being read
back from the device, or chain of devices, can be corrupted. The
corruption of data occurs at the point in which the second con-
vert start signal is introduced. Any data read back prior to the
second convert start signal is correct, but data read back after
the second convert start signal may be corrupted.
Note that the corruption of data is not limited to the conversion
result. The device address, channel address, and CRC data can
also be corrupted. The CNVST control register should be used
POWER UP AD7280A
CHAIN OF DEVICES
WAIT AT LEAST 5.5ms FOR ALL DEVICES
TO BE FULLY POWERED UP
to gate the convert start signal. This prevents any glitches that
occur on the CNVST pin from being applied directly to the
internal circuitry of the AD7280A.
SOFTWARE FLOWCHART
See Figure 41 for a software flowchart of a suggested sequence
of steps that should be considered when operating the
AD7280A in a noisy environment.
INITIALIZE DEVICE IDs ON ALL
PARTS IN THE CHAIN
WRITE TO CONTROL REGISTER
TO RETURN DB1/DB2 TO
DEFAULT VALUES
NO
CHECK
INTEGRITY OF
CHAIN INITIALIZATION
BY READING BACK THE LOW
BYTE OF THE CONTROL
REGISTER FROM
ALL DEVICES
NOT
OK
HAVE ANY
PARTS IN THE
CHAIN RETURNED A
RESULT OF ALL 0s FROM
THE CONTROL
REGISTER?
YES
PLACE CHAIN IN POWER-DOWN MODE AND
WAIT AT LEAST 2ms FOR CAPACITORS ON
V REG AND V REF TO DISSIPATE CHARGE
OK
PROGRAM CONFIGURATION
REGISTERS AS REQUIRED
WRITE TO CNVST CONTROL
REGISTER TO ALLOW A SINGLE
CNVST PULSE THROUGH
INITIATE A
CONVERSION
READ BACK THE CONVERSION RESULTS FROM ALL DEVICES IN
THE DAISY-CHAIN READBACK MODE
IGNORE RESPECTIVE
32-BIT FRAME
NO
NO
IS THE
CRC CORRECT
FOR ALL DATA FRAMES
READ BACK?
YES
DATA VALIDATION
COMPLETE
HAS THE
REQUIRED NUMBER
OF CONVERSIONS BEEN
COMPLETED?
YES
POWER DOWN AD7280A
CHAIN OF DEVICES
Figure 41. Suggested Software Flowchart When Operating in a Noisy Environment
Rev. 0 | Page 45 of 48
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相关代理商/技术参数 |
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| EVAL-AD7291SDZ | 功能描述:BOARD EVAL FOR AD7291 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-AD7292SDZ | 功能描述:数据转换 IC 开发工具 EVALUATION BOARD RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| EVAL-AD7294EBZ | 功能描述:BOARD EVALUATION FOR AD7294 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 | 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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