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| 型号： | AD7714YNZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 27/40页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT SIGMA-DELTA 24-DIP |
| 标准包装： | 15 |
| 位数： | 24 |
| 采样率（每秒）： | 1k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 7mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
| 输入数目和类型： | 3 个差分，单极；3 个差分，双极；5 个伪差分，单极；5 个伪差分，双极 |
| 产品目录页面： | 778 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7714-3EBZ-ND - BOARD EVAL FOR AD7714 |
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2
AD7714
REV. C
–33–
Table XV. C Code for Interfacing AD7714 to 68HC11
/* This program has read and write routines for the 68HC11 to interface to the AD7714 and the sample
program sets the various registers and then reads 1000 samples from the part. */
#include <math.h>
#include <io6811.h>
#define NUM_SAMPLES 1000 /* change the number of data samples */
#define MAX_REG_LENGTH 3 /* this says that the max length of a register is 3 bytes */
Writetoreg (int);
Read (int,char);
char *datapointer = store;
char store[NUM_SAMPLES*MAX_REG_LENGTH + 30];
void main()
{
/* the only pin that is programmed here from the 68HC11 is the /CS and this is why the PC2 bit
of PORTC is made as an output */
char a;
DDRC = 0x04; /* PC2 is an output the rest of the port bits are inputs */
PORTC | = 0x04;
/* make the /CS line high */
Writetoreg(0x27); /* set the channel AIN6/AIN6 and set the next operation as write to the filter high
register */
Writetoreg(0x4f); /* set Bipolar mode, 24 bits, boost off, all 4 MSBs of filterword to 1 */
Writetoreg(0x37); /* set the next operation as a write to the filter low register */
Writetoreg(0xA0); /* max filter word allowed for low part of the filterword */
Writetoreg(0x17); /* set the operation as a write to the mode register */
Writetoreg(0x20); /* set gain to 1, burnout current off, no filter sync, and do a self calibration */
while(PORTC & 0x10); /* wait for /DRDY to go low */
for(a=0;a<NUM_SAMPLES;a++);
{
Writetoreg(0x5f); /*set the next operation for 24 bit read from the data register */
Read(NUM_SAMPES,3);
}
Writetoreg(int byteword);
{
int q;
SPCR = 0x3f;
SPCR = 0X7f; /* this sets the WiredOR mode(DWOM=1), Master mode(MSTR=1), SCK idles high(CPOL=1), /SS
can be low always (CPHA=1), lowest clock speed(slowest speed which is master clock /32 */
DDRD = 0x18; /* SCK, MOSI outputs */
q = SPSR;
q = SPDR;
/* the read of the staus register and of the data register is needed to clear the interrupt
which tells the user that the data transfer is complete */
PORTC &= 0xfb; /* /CS is low */
SPDR = byteword;
/* put the byte into data register */
while(!(SPSR & 0x80));
/* wait for /DRDY to go low */
PORTC |= 0x4;
/* /CS high */
}
Read(int amount, int reglength)
{
int q;
SPCR = 0x3f;
SPCR = 0x7f;
/* clear the interupt */
DDRD = 0x10;
/* MOSI output, MISO input, SCK output */
while(PORTC & 0x10);
/* wait for /DRDY to go low */
PORTC & 0xfb ; /* /CS is low */
for(b=0;b<reglength;b++)
{
SPDR = 0;
while(!(SPSR & 0x80));
/* wait until port ready before reading */
*datapointer++=SPDR;
/* read SPDR into store array via datapointer */
}
PORTC|=4; /* /CS is high */
}
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| AD7714YNZ | 制造商:Analog Devices 功能描述:IC ADC 24-BIT SIGMA DELTA |
| AD7714YR | 功能描述:IC ADC 24BIT SIGMA-DELTA 24-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: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 |
| AD7714YR-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 1ksps 24-bit Serial 24-Pin SOIC W T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 1KSPS 24BIT SERL 24SOIC W - Tape and Reel |
| AD7714YR-REEL7 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 1ksps 24-bit Serial 24-Pin SOIC W T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 1KSPS 24BIT SERL 24SOIC W - Tape and Reel |
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