- 您现在的位置：买卖IC网 > PDF目录10231 > AD7715AR-5 (Analog Devices Inc)IC ADC 16BIT 5V 16-SOIC PDF资料下载
参数资料
| 型号： | AD7715AR-5 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 26/40页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 5V 16-SOIC |
| 标准包装： | 47 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 9.5mW |
| 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，单极；1 个差分，双极 |
| 配用： | EVAL-AD7715-3EBZ-ND - BOARD EVALUATION FOR AD7715 |
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页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
AD7715
Rev. D | Page 32 of 40
MICROCONTROLLER/MICROPROCESSOR INTERFACING
The flexible serial interface of the AD7715 allows for easy
interface to most microcontrollers and microprocessors. The
flow chart of Figure 10 outlines the sequence which should be
followed when interfacing a microcontroller or microprocessor
typical interface circuits.
The serial interface on the AD7715 has the capability of operating
from just three wires and is compatible with SPI interface
protocols. The three-wire operation makes the part ideal for
isolated systems where minimizing the number of interface
lines minimizes the number of opto-isolators required in the
system. The rise and fall times of the digital inputs to the AD7715
(especially the SCLK input) should be no longer than 1 μs.
Most of the registers on the AD7715 are 8-bit registers. This
facilitates easy interfacing to the 8-bit serial ports of micro-
controllers. Some of the registers on the part are up to 16 bits,
but data transfers to these 16-bit registers can consist of a full
16-bit transfer or two 8-bit transfers to the serial port of the
microcontroller. DSP processors and microprocessors generally
transfer 16 bits of data in a serial data operation. Some of these
processors, such as the ADSP-2105, have the facility to program
the amount of cycles in a serial transfer. This allows the user to
tailor the number of bits in any transfer to match the register
length of the required register in the AD7715.
Even though some of the registers on the AD7715 are only
eight bits in length, communicating with two of these registers
in successive write operations can be handled as a single 16-bit
data transfer if required. For example, if the setup register is to
be updated, the processor must first write to the communications
register (saying that the next operation is a write to the setup
register) and then write eight bits to the setup register. This
can all be done in a single 16-bit transfer if required because
once the eight serial clocks of the write operation to the
communications register have been completed, the part
immediately sets itself up for a write operation to the setup
register.
AD7715 TO 68HC11 INTERFACE
Figure 11 shows an interface between the AD7715 and the
68HC11 microcontroller. The diagram shows the minimum
(three-wire) interface with CS on the AD7715 hardwired low. In
this scheme, the DRDY bit of the communications register is
monitored to determine when the data register is updated. An
alternative scheme, which increases the number of interface
lines to four, is to monitor the DRDY output line from the
AD7715. The monitoring of the DRDY line can be done in
two ways. First, DRDY can be connected to one of the 68HC11’s
port bits (such as PC0) which is configured as an input. This
port bit is then polled to determine the status of DRDY. The
second scheme is to use an interrupt driven system, in which
case the DRDY output is connected to the IRQ input of the
68HC11. For interfaces that require control of the CS input on
the AD7715, one of the port bits of the 68HC11 (such as PC1),
which is configured as an output, can be used to drive the CS input.
AD7715
DOUT
SCLK
CS
68HC11
SS
DVDD
RESET
DIN
SCK
MISO
MOSI
08
51
9-
0
11
Figure 11. AD7715 to 68HC11 Interface
The 68HC11 is configured in the master mode with its CPOL
bit set to a Logic 1 and its CPHA bit set to a Logic 1. When the
68HC11 is configured like this, its SCLK line idles high between
data transfers. The AD7715 is not capable of full duplex
operation. If the AD7715 is configured for a write operation, no
data appears on the DOUT lines even when the SCLK input is
active. Similarly, if the AD7715 is configured for a read
operation, data presented to the part on the DIN line is ignored
even when SCLK is active.
Coding for an interface between the 68HC11 and the AD7715 is
given in the C Code for Interfacing AD7715 to 68HC11 section.
In this example, the DRDY output line of the AD7715 is con-
nected to the PC0 port bit of the 68HC11 and is polled to
determine its status.
相关PDF资料 |
PDF描述 |
|---|---|
| MS27467E13A8S | CONN PLUG 8POS STRAIGHT W/SCKT |
| SP202ECT-L/TR | IC DVR/RCVR RS232 QUAD 16WSOIC |
| MS27484T10A98P | CONN PLUG 6POS STRAIGHT W/PINS |
| LTC1418ACG#TR | IC A/D CONV 14BIT SRL&PAR 28SSOP |
| SP232EET-L/TR | IC DVR/RCVR RS232 5V SGL 16WSOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7715AR-5REEL | 功能描述:IC ADC 16BIT SIGMA-DELTA 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7715ARU-3 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 19.2ksps 16-bit Serial 16-Pin TSSOP |
| AD7715ARU-3REEL | 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7715ARU-3REEL7 | 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7715ARU-5 | 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
发布紧急采购，3分钟左右您将得到回复。