- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10537 > AD7938BSUZ (Analog Devices Inc)IC ADC 12BIT 8CHAN 32TQFP PDF資料下載
參數(shù)資料
| 型號(hào)： | AD7938BSUZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT 8CHAN 32TQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1.5M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 13.5mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-TQFP |
| 供應(yīng)商設(shè)備封裝： | 32-TQFP（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 8 個(gè)單端，單極；4 個(gè)差分，單極；4 個(gè)偽差分，單極；7 偽差分，單極 |
| 配用： | EVAL-AD7938CBZ-ND - EVAL BOARD FOR AD7938 |
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頁當(dāng)前第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頁第36頁
Data Sheet
AD7938/AD7939
Rev. C | Page 27 of 36
Writing Data to the AD7938/AD7939
With W/B tied logic high, a single write operation transfers the
full data-word on DB0 to DB11 to the control register on the
AD7938/AD7939. The DB8/HBEN pin assumes its DB8
function. Data written to the AD7938/AD7939 should be
provided on the DB0 to DB11 inputs, with DB0 being the LSB
of the data-word. With W/B tied logic low, the
AD7938/AD7939 requires two write operations to transfer a full
12-bit word. DB8/HBEN assumes its HBEN function. Data
written to the AD7938/AD7939 should be provided on the DB0
to DB7 inputs. HBEN determines whether the byte written is
high byte or low byte data. The low byte of the data-word
should be written first with DB0 being the LSB of the full data-
word. For the high byte write, HBEN should be high and the
data on the DB0 input should be data Bit 8 of the 12-bit word.
In both word and byte mode, a single write operation to the
shadow register is always sufficient since it is only eight bits
wide.
Figure 38 shows the write cycle timing diagram of the
AD7938/AD7939 in word mode. When operating in word
mode, the HBEN input does not exist and only one write
operation is required to write the word of data to the device.
Data should be provided on DB0 to DB11. When operating in
byte mode, the two write cycles shown in Figure 39 are required
to write the full data-word to the AD7938/AD7939. In Figure 39,
the first write transfers the lower eight bits of the data-word
from DB0 to DB7, and the second write transfers the upper four
bits of the data-word. When writing to the AD7938/AD7939, the
top four bits in the high byte must be 0s.
The data is latched into the device on the rising edge of WR.
The data needs to be setup a time, t7, before the WR rising edge
and held for a time, t8, after the WR rising edge. The CS and
WR signals are gated internally. CS and WR can be tied
together as the timing specifications for t4 and t5 are 0 ns
minimum (assuming CS and RD have not already been tied
together).
t8
t5
t7
t6
t4
DATA
DB0 TO DB11
WR
CS
03
71
5-
00
2
Figure 38. AD7938/AD7939 Parallel Interface—Write Cycle Timing for Word Mode Operation (W/B = 1)
t5
t4
t7
t18
t19
t8
t6
t17
LOW BYTE
HIGH BYTE
DB0 TO DB11
HBEN/DB8
WR
CS
03
71
0
03
Figure 39. AD7938/AD7939 Parallel Interface—Write Cycle Timing for Byte Mode Operation (W/B = 0)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VI-B41-MW | CONVERTER MOD DC/DC 12V 100W |
| AD7650ASTZ | IC ADC 16BIT 570KSPS 48LQFP |
| AD7694BRMZ | IC ADC 16BIT SRL 250KSPS 8MSOP |
| VI-2TR-MX | CONVERTER MOD DC/DC 7.5V 75W |
| ISL3152EIUZ-T7A | IC LINEAR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7938BSUZ6 | 制造商:AD 功能描述:Pb Free |
| AD7938BSUZ-6 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP 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(gè)單端，單極 |
| AD7938BSUZ-6REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP 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(gè)單端，單極；2 個(gè)差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7938BSUZ-REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP 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):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極 |
| AD7939 | 制造商:AD 制造商全稱:Analog Devices 功能描述:8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。