参数资料
| 型号： | AD7291BCPZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC I2C/SRL 22.22K 20LFCSP |
| 标准包装： | 1,500 |
| 位数： | 12 |
| 采样率（每秒）： | 22.22k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 12.6mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-WQ（4x4） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极 |
| 配用： | EVAL-AD7291SDZ-ND - BOARD EVAL FOR AD7291 |
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AD7291
Data Sheet
Rev. B | Page 24 of 28
MODES OF OPERATION
When supplies are first applied to the AD7291, the ADC
powers up in partial power-down mode and normally remains
in this partial power-down state while not converting. Once
the master addresses the AD7291, it exits partial power-down.
There are two methods of initiating a conversion on the
AD7291: command mode and autocycle mode.
COMMAND MODE
In command mode, the AD7291 converts on demand on either
a single channel or a sequence of channels. Writing in the
command register puts the part into command mode. This is
the default mode of operation and allows a conversion to be
automatically selected any time a write operation occurs to the
command register. To enter this mode, the required combina-
tion of channels is written into the command register (Register
0x00). Following the write operation, the AD7291 must be
addressed again to indicate that a read operation is required.
The read then takes place from the voltage or temperature
conversion result register. For the first conversion to occur,
the address pointer written to the AD7291 must point to the
voltage conversion result register or TSENSE conversion result
register. The conversion is completed while the first four
channel address bits are read. The next conversion in the
sequence takes place once the next read from the result
register is initiated. When operating the device in fast mode, the
acquisition and conversion times combined take approximately
4.45 μs (1.25 μs acquisition time plus 3.2 μs conversion time).
When in command mode, the part cycles through the selected
channels from the lowest selected channel in the sequence to
the next lowest until all the channels in the sequence are
converted.
To exit the command mode, the master should not acknowledge
the final byte of data. This stops the AD7291 transmitting,
allowing the master to assert a stop condition on the bus. On
the receipt of a stop condition, the AD7291 stops converting
and enters partial power-down mode, but the content of the
command register is preserved. Once the part is readdressed
and a read is initiated from the voltage conversion register, the
AD7291 begins converting on the previously selected sequence
of channels. The conversion sequence starts converting the
first selected channel in the sequence; that is, if Channel 1,
Channel 2, and Channel 3 are selected and a stop condition
occurs after the Channel 1 result is read, on resumption of
conversions, Channel 1 is reconverted and the conversion
sequence continues.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7291TCPZ-EP | 功能描述:CH 12 BIT SAR WT INTERNAL TEMP S 制造商:analog devices inc. 系列:- 包装:托盘 零件状态:在售 位数:12 采样率（每秒）:22.22k 输入数:8 输入类型:单端 数据接口:I2C 配置:MUX-S/H-ADC 无线电 - S/H:ADC:1:1 A/D 转换器数:1 架构:SAR 参考类型:外部， 内部 电压 - 电源，模拟:2.8 V ~ 3.6 V 电压 - 电源，数字:2.8 V ~ 3.6 V 特性:温度传感器 工作温度:-55°C ~ 125°C（TA） 封装/外壳:20-WFQFN 裸露焊盘，CSP 供应商器件封装:20-LFCSP（4x4） 标准包装:1 |
| AD7291TCPZ-EP-RL7 | 功能描述:8 CH 12 BIT SAR WT INTERNAL TEMP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 位数:12 采样率（每秒）:22.22k 输入数:8 输入类型:单端 数据接口:I2C 配置:MUX-S/H-ADC 无线电 - S/H:ADC:1:1 A/D 转换器数:1 架构:SAR 参考类型:外部， 内部 电压 - 电源，模拟:2.8 V ~ 3.6 V 电压 - 电源，数字:2.8 V ~ 3.6 V 特性:温度传感器 工作温度:-55°C ~ 125°C（TA） 封装/外壳:20-WFQFN 裸露焊盘，CSP 供应商器件封装:20-LFCSP（4x4） 标准包装:1,500 |
| AD7292BCPZ | 制造商:Analog Devices 功能描述:Monitor and Control System 36-Pin LFCSP EP Tray 制造商:Analog Devices 功能描述:12-BIT,MULTI-CHANNEL, ADC,DAC WT TEMP IC - Trays 制造商:Analog Devices 功能描述:IC ADC 10BIT SPI/SRL 36-LFCSP 制造商:Analog Devices 功能描述:ADC DAC TEMP SENSOR GPIO 3 制造商:Analog Devices 功能描述:ADC, DAC, TEMP SENSOR, GPIO, 36LFCSP 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 12-Bit Multi-Channel ADC DAC wt Temp IC 制造商:Analog Devices 功能描述:ANALOGUE MONITORING & CONTROL CIRCUIT, LFCSP-36; IC Function:Analogue Monitoring and Control Circuit; Supply Voltage Min:1.8V; Supply Voltage Max:5.25V; Operating Temperature Min:-40C; Operating Temperature Max:125C; No. of Pins:36;RoHS Compliant: Yes |
| AD7292BCPZ-RL | 制造商:Analog Devices 功能描述:Monitor and Control System 36-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:12-BIT,MULTI-CHANNEL, ADC,DAC WT TEMP IC - Tape and Reel 制造商:Analog Devices 功能描述:IC ADC 10BIT SPI/SRL 36LFCSP 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 12-Bit Multi-Channel ADC DAC wt Temp IC 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 10B Monitor & Cntrl System w/ Temp Sensr |
| AD7293BCPZ | 功能描述:12-BIT POWER AMPLIFIER CURRENT C 制造商:analog devices inc. 系列:* 零件状态:有效 标准包装:1 |
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