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| 型号： | DC1783A-E |
| 厂商： | Linear Technology |
| 文件页数： | 7/26页 |
| 文件大小： | 0K |
| 描述： | BOARD SAR ADC LTC2379-18 |
| 软件下载： | QuikEval II System |
| 设计资源： | DC1783A Design Files DC1783A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™ |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 1.6M |
| 数据接口： | 串行，SPI? |
| 输入范围： | ±VREF |
| 在以下条件下的电源（标准）： | 18mW @ 1.6MSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2379-18 |
| 已供物品： | 板 |
| 相关产品： | DC1216A-A-ND - BOARD EVAL 100MHZ CLOCK DC718C-ND - DEMO QUIKEVAL-II DATA LTC2379IMS-18#TRPBF-ND - IC ADC 18BIT SPI/SRL 16MSOP LTC2379IDE-18#TRPBF-ND - IC ADC 18BIT SPI/SRL 16DFN LTC2379HMS-18#PBF-ND - IC ADC 18BIT SPI/SRL 16MSOP LTC2379CMS-18#PBF-ND - IC ADC 18BIT SPI/SRL 16MSOP LTC2379HMS-18#TRPBF-ND - IC ADC 18BIT SPI/SRL 16MSOP LTC2379CMS-18#TRPBF-ND - IC ADC 18BIT SPI/SRL 16MSOP LTC2379CDE-18#TRPBF-ND - IC ADC 18BIT SPI/SRL 16DFN LTC2379CDE-18#PBF-ND - IC ADC 18BIT SPI/SRL 16DFN 更多... |
LTC2379-18
15
237918fa
reinitialize the ADC. No conversions should be initiated
until 20μs after a POR event to ensure the reinitialization
period has ended. Any conversions initiated before this
time will produce invalid results.
TIMING AND CONTROL
CNV Timing
The LTC2379-18 conversion is controlled by CNV. A ris-
ing edge on CNV will start a conversion and power up the
LTC2379-18. Once a conversion has been initiated, it cannot
be restarted until the conversion is complete. For optimum
performance, CNV should be driven by a clean low jitter
signal. Converter status is indicated by the BUSY output
which remains high while the conversion is in progress.
To ensure that no errors occur in the digitized results, any
additional transitions on CNV should occur within 40ns
from the start of the conversion or after the conversion
has been completed. Once the conversion has completed,
the LTC2379-18 powers down and begins acquiring the
input signal.
Internal Conversion Clock
The LTC2379-18 has an internal clock that is trimmed to
achieve a maximum conversion time of 412ns. With a min-
imum acquisition time of 200ns, throughput performance
of 1.6Msps is guaranteed without any external adjustments.
Auto Power-Down
The LTC2379-18 automatically powers down after a con-
version has been completed and powers up once a new
conversion is initiated on the rising edge of CNV. During
power down, data from the last conversion can be clocked
out. To minimize power dissipation during power down,
disable SDO and turn off SCK. The auto power-down feature
will reduce the power dissipation of the LTC2379-18 as
the sampling frequency is reduced. Since power is con-
sumed only during a conversion, the LTC2379-18 remains
APPLICATIONS INFORMATION
powered-down for a larger fraction of the conversion cycle
(tCYC) at lower sample rates, thereby reducing the average
power dissipation which scales with the sampling rate as
shown in Figure 12.
DIGITAL INTERFACE
The LTC2379-18 has a serial digital interface. The flexible
OVDD supply allows the LTC2379-18 to communicate with
any digital logic operating between 1.8V and 5V, including
2.5V and 3.3V systems.
The serial output data is clocked out on the SDO pin when
an external clock is applied to the SCK pin if SDO is enabled.
Clocking out the data after the conversion will yield the
best performance. With a shift clock frequency of at least
100MHz, a 1.6Msps throughput is still achieved. The serial
output data changes state on the rising edge of SCK and
can be captured on the falling edge or next rising edge of
SCK. D17 remains valid till the first rising edge of SCK.
The serial interface on the LTC2379-18 is simple and
straightforward to use. The following sections describe the
operation of the LTC2379-18. Several modes are provided
depending on whether a single or multiple ADCs share the
SPI bus or are daisy chained.
SAMPLING RATE (kHz)
0
200 400 600 800
1600
1400
1200
1000
0
POWER
SUPPL
Y
CURRENT
(mA)
5
4
2
1
3
8
7
6
237918 F12
IVDD
IREF
IOVDD
Figure 12. Power Supply Current of the LTC2379-18
Versus Sampling Rate
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| DC1783A-F | 功能描述:BOARD SAR ADC LTC2378-18 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列: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 |
| DC1783A-G | 功能描述:BOARD SAR ADC LTC2377-18 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列: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 |
| DC1783A-H | 功能描述:BOARD SAR ADC LTC2376-18 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列: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 |
| DC1785A | 功能描述:BOARD DEMO LTC2991 RoHS:是 类别:编程器，开发系统 >> 评估板 - 传感器 系列:QuikEval™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| DC1785A | 制造商:Linear Technology 功能描述:EVAL BOARD, LTC2991 TEMP, VOLTAGE, CURRE |
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