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参数资料
| 型号： | AD7858BRZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 8CHAN SRL 24SOIC |
| 标准包装： | 1,000 |
| 位数： | 12 |
| 采样率（每秒）： | 200k |
| 数据接口： | 8051，QSPI?，串行，SPI? µP |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 33mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极；4 个伪差分，单极 |
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AD7858/AD7858L
REV. B
–27–
Interface Mode 2 Configuration
Figure 35 shows the flowchart for configuring the part in Inter-
face Mode 2. In this case the read and write operations take
place simultaneously via the serial port. Writing all 0s ensures
that no valid data is written to any of the registers. When using
the software conversion start and transferring data during con-
version Note 1 must be obeyed.
APPLY
SYNC (IF REQUIRED), SCLK, WRITE
TO CONTROL REGISTER SETTING CHANNEL,
(SEE NOTE 1)
INITIATE
CONVERSION
IN
SOFTWARE
?
START
POWER-ON, APPLY CLKIN SIGNAL,
WAIT FOR AUTOMATIC CALIBRATION
PULSE
CONVST PIN
WAIT FOR BUSY SIGNAL TO GO LOW
OR
WAIT FOR BUSY BIT = 0
NO
SERIAL
INTERFACE
MODE
?
TRANSFER
DATA DURING
CONVERSION
?
NO
YES
APPLY
SYNC (IF REQUIRED), SCLK,
READ CURRENT CONVERSION RESULT
ON DOUT PIN, AND WRITE CHANNEL
SELECTION
NOTES
1WHEN USING THE SOFTWARE CONVERSION START AND TRANSFERRING DATA DURING CONVERSION THE USER MUST ENSURE THE CONTROL REGISTER
WRITE OPERATION EXTENDS BEYOND THE FALLING EDGE OF BUSY. THE FALLING EDGE OF BUSY RESETS THE CONVST BIT TO 0 AND ONLY AFTER THIS
TIME CAN IT BE REPROGRAMMED TO 1 TO START THE NEXT CONVERSION.
2TWO SEPARATE WRITES ARE REQUIRED TO SET A NEW CHANNEL ADDRESS AND INITIATE A CONVERSION ON THAT NEW CHANNEL IN SOFTWARE AS
THE ACQUISITION TIME (2
tCLKIN) MUST ELAPSE BEFORE THE CONVERSION BEGINS. IF BOTH COMMANDS ARE ISSUED IN THE ONE WRITE THE
RESULT OF THIS CONVERSION SHOULD BE DISCARDED AND THE NEXT CONVERSION ON THAT SAME CHANNEL WILL PROVIDE CORRECT RESULTS.
WAIT APPROX 200ns AFTER
CONVST RISING EDGE
APPLY
SYNC (IF REQUIRED), SCLK, READ
PREVIOUS CONVERSION RESULT ON DOUT
PIN, AND WRITE CHANNEL SELECTION
NO
APPLY
SYNC (IF REQUIRED), SCLK, WRITE
TO CONTROL REGISTER SETTING CHANNEL
WAIT FOR BUSY SIGNAL TO GO LOW
OR
WAIT FOR BUSY BIT = 0
YES
2
WRITE TO CONTROL REGISTER SETTING
CONVST BIT TO 1, READ
CURRENT CONVERSION RESULT
ON DOUT PIN (SEE NOTE 2)
WRITE TO CONTROL REGISTER
SETTING CONVST BIT TO 1,
READ PREVIOUS RESULT ON
DOUT PIN (SEE NOTES 1&2)
TRANSFER
DATA DURING
CONVERSION
?
Figure 35. Flowchart for Setting Up, Reading, and Writing in Interface Mode 2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7858L | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC |
| AD7858LAN | 制造商:Analog Devices 功能描述: |
| AD7858LAN3 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC |
| AD7858LANZ | 功能描述:IC ADC 12BIT 8CHAN SRL 24DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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