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参数资料
| 型号： | DC1009A-A |
| 厂商： | Linear Technology |
| 文件页数： | 6/36页 |
| 文件大小： | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2492 |
| 软件下载： | QuikEval System |
| 设计资源： | DC1009A Design File DC1009A Schematic |
| 标准包装： | 1 |
| 系列： | Easy Drive™, QuikEval™ |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 7.5 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 已用 IC / 零件： | LTC2492 |
| 已供物品： | 板 |
| 相关产品： | LTC2492CDE#TRPBF-ND - IC ADC 24BIT DELTA SIG 14-DFN LTC2492IDE#TRPBF-ND - IC ADC 24BIT DELTA SIG 14-DFN LTC2492IDE#PBF-ND - IC ADC 24BIT DELTA SIG 14-DFN LTC2492CDE#PBF-ND - IC ADC 24BIT DELTA SIG 14-DFN |
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LTC2492
14
2492fd
APPLICATIONS INFORMATION
CONVERTER OPERATION
Converter Operation Cycle
The LTC2492 is a multi-channel, low power, delta-sigma
analog-to-digital converter with an easy to use 4-wire
interface and automatic differential input current cancella-
tion. Its operation is made up of four states (See Figure 2).
The converter operating cycle begins with the conversion,
followed by the sleep state and ends with the data input/
output cycle. The 4-wire interface consists of serial data
output (SDO), serial clock (SCK), chip select (CS) and
serial data input (SDI). The interface, timing, operation
cycle, and data output format is compatible with Linear’s
entire family of SPI Δ∑ converters.
Initially, at power up, the LTC2492 performs a conversion.
Once the conversion is complete, the device enters the
sleep state. While in this sleep state, if CS is HIGH, power
consumption is reduced by two orders of magnitude. The
part remains in the sleep state as long as CS is HIGH. The
conversion result is held indenitely in a static shift register
while the part is in the sleep state.
Once CS is pulled LOW, the device powers up, exits the
sleep state, and enters the data input/output state. If CS
is brought HIGH before the rst rising edge of SCK, the
device returns to the sleep state and the power is reduced.
If CS is brought HIGH after the rst rising edge of SCK, the
data output cycle is aborted and a new conversion cycle
begins. The data output corresponds to the conversion
just completed. This result is shifted out on the serial
data output pin (SDO) under the control of the serial
clock pin (SCK). Data is updated on the falling edge of
SCK allowing the user to reliably latch data on the rising
edge of SCK (See Figure 3). The conguration data for
the next conversion is also loaded into the device at this
time. Data is loaded from the serial data input pin (SDI)
on each rising edge of SCK. The data input/output cycle
concludes once 32 bits are read out of the ADC or when
CS is brought HIGH. The device automatically initiates a
new conversion and the cycle repeats.
Through timing control of the CS and SCK pins, the LTC2492
offers several exible modes of operation (internal or
external SCK and free-running conversion modes). These
various modes do not require programming and do not
disturb the cyclic operation described above. These modes
of operation are described in detail in the Serial Interface
Timing Modes section.
Ease of Use
The LTC2492 data output has no latency, lter settling
delay, or redundant data associated with the conversion
cycle. There is a one-to-one correspondence between the
conversion and the output data. Therefore, multiplexing
multiple analog inputs is straight forward. Each conversion,
immediately following a newly selected input or mode,
is valid and accurate to the full specications of the
device.
The LTC2492 automatically performs offset and full scale
calibration every conversion cycle independent of the
input channel selected. This calibration is transparent
to the user and has no effect with the operation cycle
described above. The advantage of continuous calibration
is extreme stability of offset and full-scale readings with
respect to time, supply voltage variation, input channel,
and temperature drift.
Figure 2. LTC2492 State Transition Diagram
CONVERT
SLEEP
CHANNEL SELECT
CONFIGURATION SELECT
DATA OUTPUT
POWER UP
IN+= CH0, IN–= CH1
50/60Hz,1x
2492 F02
CS = LOW
AND
SCK
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相关代理商/技术参数 |
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| DC1009A-B | 功能描述:BOARD DELTA SIGMA ADC LTC2488 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:Easy Drive™, QuikEval™ 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 |
| DC1009A-C | 功能描述:BOARD DELTA SIGMA ADC LTC2486 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:Easy Drive™, QuikEval™ 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 |
| DC100A10 | 功能描述:固态继电器-工业安装 SSR DC OUTPUT 10A 90-140VAC RoHS:否 制造商:Crydom 控制电压范围:4 VDC to 32 VDC 负载电压额定值:7 VDC to 72 VDC 负载电流额定值:160 A 触点形式: 输出设备:SSR 安装风格:Panel |
| DC100A10C | 功能描述:固态继电器-工业安装 SSR DC OUTPUT 10A 90-140VAC RoHS:否 制造商:Crydom 控制电压范围:4 VDC to 32 VDC 负载电压额定值:7 VDC to 72 VDC 负载电流额定值:160 A 触点形式: 输出设备:SSR 安装风格:Panel |
| DC100A20 | 功能描述:固态继电器-工业安装 SSR DC OUTPUT 20A 90-140VAC RoHS:否 制造商:Crydom 控制电压范围:4 VDC to 32 VDC 负载电压额定值:7 VDC to 72 VDC 负载电流额定值:160 A 触点形式: 输出设备:SSR 安装风格:Panel |
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