- 您现在的位置：买卖IC网 > PDF目录17049 > EVAL-AD7986EBZ (Analog Devices Inc)BOARD EVAL FOR AD7986 PDF资料下载
参数资料
| 型号： | EVAL-AD7986EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7986 |
| 产品培训模块： | Motor Control |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 2M |
| 数据接口： | 串行 |
| 输入范围： | ±VREF |
| 在以下条件下的电源（标准）： | 29mW @ 2MSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7986 |
| 已供物品： | 板 |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第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
AD7986
Rev. B | Page 17 of 28
DIGITAL INTERFACE
Although the AD7986 has a reduced number of pins, it offers
flexibility in its serial interface modes.
When in CS mode, the AD7986 is compatible with SPI,
MICROWIRE, QSPI, and digital hosts. In this mode, the
AD7986 can use either a 3-wire or a 4-wire interface. A 3-wire
interface using the CNV, SCK, and SDO signals minimizes
wiring connections, which is useful, for instance, in isolated
applications. A 4-wire interface using the SDI, CNV, SCK, and
SDO signals allows CNV, which initiates conversions, to be
independent of the readback timing (SDI). This is useful in low
jitter sampling or simultaneous sampling applications.
When in chain mode, the AD7986 provides a daisy-chain feature
using the SDI input for cascading multiple ADCs on a single
data line similar to a shift register. Chain mode is only available
in normal mode (TURBO = low).
The mode in which the part operates depends on the SDI level
when the CNV rising edge occurs. The CS mode is selected if
SDI is high, and the chain mode is selected if SDI is low. The
SDI hold time is such that when SDI and CNV are connected
together, the chain mode is always selected.
In normal mode operation, the AD7986 offers the option of
forcing a start bit in front of the data bits. This start bit can be
used as a busy signal indicator to interrupt the digital host and
trigger the data reading. Otherwise, without a busy indicator,
the user must time out the maximum conversion time prior to
readback.
The busy indicator feature is enabled in CS mode if CNV or
SDI is low when the ADC conversion ends (see Figure 28 and
Figure 32), and TURBO must be kept low for both digital
interfaces.
When CNV is low, reading can occur during conversion and
acquisition, and when split across acquisition and conversion,
as detailed in the following sections.
A discontinuous SCK is recommended because the part is
selected with CNV low, and SCK activity begins to clock
out data.
Note that in the following sections, the timing diagrams
indicate digital activity (SCK, CNV, SDI, and SDO) during
the conversion. However, due to the possibility of performance
degradation, digital activity should occur only prior to the safe
data reading time, tDATA, because the AD7986 provides error
correction circuitry that can correct for an incorrect bit decision
during this time. From tDATA to tCONV, there is no error correction,
and conversion results may be corrupted. Similarly, tQUIET, the
time from the last falling edge of SCK to the rising edge of CNV,
must remain free of digital activity. The user should configure
the AD7986 and initiate the busy indicator (if desired in normal
mode) prior to tDATA. It is also possible to corrupt the sample by
having SCK near the sampling instant. Therefore, it is recom-
mended to keep the digital pins quiet for approximately 20 ns
before and 10 ns after the rising edge of CNV, using a
discontinuous SCK whenever possible to avoid any potential
performance degradation.
相关PDF资料 |
PDF描述 |
|---|---|
| HKQ0603S1N3C-T | INDUCTOR HI FREQ 1.3NH 0201 |
| MPC8313E-RDB | BOARD PROCESSOR |
| STD01W-J | WIRE & CABLE MARKERS |
| STD09W-C | WIRE & CABLE MARKERS |
| STD09W-T | WIRE & CABLE MARKERS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7988-5SDZ | 功能描述:BAORD EVAL FOR AD7988-5 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:PulSAR® 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 |
| EVAL-AD7991EBZ | 功能描述:BOARD EVAL FOR AD7991 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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 |
| EVAL-AD7991EBZ | 制造商:Analog Devices 功能描述:AD7991, ADC, I2C, EVALUATION BOARD |
| EVAL-AD7992CB | 制造商:AD 制造商全称:Analog Devices 功能描述:2-Channel, 12-Bit ADC with I2C-Compatible |
| EVAL-AD7992EBZ | 功能描述:BOARD EVALUATION FOR AD7992 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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 |
发布紧急采购，3分钟左右您将得到回复。