- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1982 > AD7707BRU (Analog Devices Inc)IC ADC 16BIT 3CH 20-TSSOP PDF資料下載
參數(shù)資料
| 型號： | AD7707BRU |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 36/52頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 3CH 20-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 500 |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 1mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-TSSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極；1 個單端，雙極；2 個偽差分，單極；2 個偽差分，雙極 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當(dāng)前第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁
AD7707
Rev. B | Page 41 of 52
CODE FOR SETTING UP THE AD7707
The C Code for Interfacing AD7707 to 68HC11 section gives a
set of read and write routines in C code for interfacing the
68HC11 microcontroller to the AD7707. The sample program
sets up the various registers on the AD7707 and reads 1000
samples from the part into the 68HC11. The setup conditions
on the part are exactly the same as those outlined for the
flowchart of Figure 22. In the example code given here, the
DRDY output is polled to determine if a new valid word is
available in the data register.
The sequence of the events in this program are as follows:
1.
Write to the communications register, selecting Channel 1
(AIN1) as the active channel and setting the next operation
to be a write to the clock register.
2.
Write to the clock register setting the CLKDIV bit to 1,
which divides the external clock internally by two. This
assumes that the external crystal is 4.9512 MHz. The
update rate is selected to be 50 Hz.
3.
Write to communication register selecting Channel 1
(AIN1) as the active channel and setting the next operation
to be a write to the setup register.
4.
Write to the setup register, setting the gain to 1, setting
bipolar mode, buffer off, clearing the filter synchroniza-
tion, and initiating a self-calibration.
5.
Poll the DRDY output.
6.
Read the data from the data register.
7.
Repeat Step 5 and Step 6 until the specified number of
samples have been taken from the selected channel.
C CODE FOR INTERFACING AD7707 TO 68HC11
/* This program has read and write routines for the 68HC11 to interface to the AD7707 and the
sample program sets the various registers and then reads 1000 samples from one channel. */
#include <math.h>
#include <io6811.h>
#define NUM_SAMPLES 1000 /* change the number of data samples */
#define MAX_REG_LENGTH 2 /* this says that the max length of a register is 2 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 (0x20); /* Active Channel is AIN1/LOCOM, next operation as write to the clock
register */
Writetoreg (0x18); /* master clock enabled, 4.9512 MHz Clock, set output rate to 50 Hz*/
Writetoreg (0x10); /* Active Channel is AIN1/LOCOM, next operation as write to the setup
register */
Writetoreg (0x40); /* gain = 1, bipolar mode, buffer off, clear FSYNC and perform a Self
Calibration*/
while (PORTC and 0x10); /* wait for /DRDY to go low */
for (a=0;a<NUM_SAMPLES;a++);
{
Writetoreg (0x38); /*set the next operation for 16 bit read from the data register */
Read (NUM_SAMPES,2);
}
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7709ARU | IC ADC 16BIT SIGMA-DELTA 24TSSOP |
| AD7710AQ | IC ADC 24BIT DIFF INP 24-CDIP |
| AD7711AAR | IC ADC 24BIT RTD I SOURCE 24SOIC |
| AD7711AN | IC ADC 24BIT RTD I SOURCE 24-DIP |
| AD7712AR | IC ADC SIGNAL COND LC2MOS 24SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7707BRU-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 500sps 16-bit Serial 20-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 0.5KSPS 16BIT SERL 20TSSOP - Tape and Reel |
| AD7707BRU-REEL7 | 功能描述:IC ADC 16BIT 3CH 20-TSSOP T/R RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7707BRUZ | 功能描述:IC ADC 16BIT 3CH 20-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7707BRUZ-REEL | 功能描述:IC ADC 16BIT 3CH 20-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7707BRUZ-REEL7 | 功能描述:IC ADC 16BIT 3CHAN 20TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。