- 您现在的位置：买卖IC网 > PDF目录10363 > AD7278AUJZ-RL7 (Analog Devices Inc)IC ADC 8BIT 3MSPS 6TSOT PDF资料下载
参数资料
| 型号： | AD7278AUJZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT 3MSPS 6TSOT |
| 标准包装： | 3,000 |
| 位数： | 8 |
| 采样率（每秒）： | 3M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 19.8mW |
| 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： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
AD7276/AD7277/AD7278
Rev. C | Page 18 of 28
CS can idle high until the next conversion or low until CS returns
high before the next conversion (effectively idling CS low).
MODES OF OPERATION
The mode of operation of the AD7276/AD7277/AD7278 is
selected by controlling the logic state of the CS signal during a
conversion. There are three possible modes of operation: normal
mode, partial power-down mode, and full power-down mode.
The point at which CS is pulled high after the conversion has
been initiated determines which power-down mode, if any, the
device enters. Similarly, if the device is already in power-down
mode, CS can control whether the device returns to normal
operation or remains in power-down mode. These modes of
operation are designed to provide flexible power management
options, which can be chosen to optimize the power dissipation/
throughput rate ratio for different application requirements.
Once a data transfer is complete (SDATA has returned to three-
state), another conversion can be initiated after the quiet time,
tQUIET, has elapsed by bringing CS low again.
Partial Power-Down Mode
This mode is intended for use in applications where slower
throughput rates are required. An example of this is when either
the ADC is powered down between each conversion or a series
of conversions is performed at a high throughput rate and then
the ADC is powered down for a relatively long duration between
these bursts of several conversions. When the AD7276/AD7277/
AD7278 are in partial power-down mode, all analog circuitry is
powered down except the bias-generation circuit.
Normal Mode
This mode is intended for fastest throughput rate performance
because the device remains fully powered at all times, eliminating
worry about power-up times. Figure 24 shows the general diagram
of AD7276/AD7277/AD7278 operation in this mode.
To enter partial power-down mode, interrupt the conversion
process by bringing CS high between the second and 10th falling
edges of SCLK, as shown in
.
Once CS is brought high in this window of SCLKs, the part
enters partial power-down mode, the conversion that was
initiated by the falling edge of CS is terminated, and SDATA
goes back into three-state. If CS is brought high before the
second SCLK falling edge, the part remains in normal mode and
does not power down. This prevents accidental power-down due
to glitches on the CS line.
The conversion is initiated on the falling edge of CS as described
in the
section. To ensure that the part remains
fully powered up at all times,
CS must remain low until at least
10 SCLK falling edges elapse after the falling edge of CS. If CS is
brought high after the 10th SCLK falling edge but before the 16th
SCLK falling edge, the part remains powered up, but the con-
version is terminated and SDATA goes back into three-state.
For the AD7276, a minimum of 14 serial clock cycles are required
to complete the conversion and access the complete conversion
result. For the AD7277 and AD7278, a minimum of 12 and
10 serial clock cycles are required to complete the conversion
and to access the complete conversion result, respectively.
CS
SCLK
110
12
14
16
AD7276/
AD7677/AD7278
SDATA
VALID DATA
04
90
3-
02
4
Figure 24. Normal Mode Operation
SCLK
12
10
16
SDATA
THREE-STATE
CS
04
90
3-
0
25
Figure 25. Entering Partial Power-Down Mode
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2360HS6#TRPBF | IC ADC 12BIT 100KSPS TSOT23-6 |
| LTC2360ITS8#TRMPBF | IC ADC 12BIT 100KSPS TSOT23-8 |
| D38999/24WE26SNLC | CONN HSG RCPT 26POS JAM NUT SCKT |
| D38999/24WE26BN | CONN HSG RCPT 26POS JAM NUT SCKT |
| LTC2361CS6#TRPBF | IC ADC 12BIT 250KSPS TSOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7278BRMJ | 制造商:AD 制造商全称:Analog Devices 功能描述:3MSPS,12-/10-/8-Bit ADCs in 6-Lead TSOT |
| AD7278BRMZ | 功能描述:IC ADC 8BIT 3MSPS HS LP 8MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 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:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7278BRMZ-REEL | 功能描述:IC ADC 8BIT 3MSPS HS LP 8MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7278BUJ-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:3MSPS,12-/10-/8-Bit ADCs in 6-Lead TSOT |
| AD7278BUJZ-500RL7 | 功能描述:IC ADC 8BIT 3MSPS HS LP TSOT23-6 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 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
发布紧急采购，3分钟左右您将得到回复。