參數(shù)資料
型號(hào)： AD678BD
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 14/14頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT SAMPLING 28-CDIP
標(biāo)準(zhǔn)包裝： 1
位數(shù)： 12
采樣率（每秒）： 200k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 745mW
電壓電源： 模擬和數(shù)字，雙 ±
工作溫度： -40°C ~ 85°C
安裝類型： 通孔
封裝/外殼： 28-CDIP（0.605"，15.37mm）
供應(yīng)商設(shè)備封裝： 28-CDIP
包裝： 管件
輸入數(shù)目和類型： 1 個(gè)單端，單極；1 個(gè)單端，雙極
AD678
REV. C
–9–
CONVERSION CONTROL
In synchronous mode (SYNC = HIGH), both Chip Select (
CS)
and Start Convert (
SC) must be brought LOW to start a con-
version.
CS should be LOW t
SC before SC is brought LOW. In
asynchronous mode (SYNC = LOW), a conversion is started by
bringing
SC low, regardless of the state of CS.
Before a conversion is started, End-of-Convert (EOC) is HIGH,
and the sample-hold is in track mode. After a conversion is
started, the sample-hold goes into hold mode and EOC goes
LOW, signifying that a conversion is in progress. During the
conversion, the sample-hold will go back into track mode and
start acquiring the next sample. EOC goes HIGH when the con-
version is finished.
In track mode, the sample-hold will settle to
±0.01% (12 bits)
in 1
s maximum. The acquisition time does not affect the
throughput rate as the AD678 goes back into track mode more
than 1
s before the next conversion. In multichannel systems,
the input channel can be switched as soon as EOC goes LOW if
the maximum throughput rate is needed.
12-Bit Mode Coding Format (1 LSB = 2.44 mV)
Unipolar Coding
Bipolar Coding
(Straight Binary)
(Twos Complement)
VIN*
Output Code
VIN*
Output Code
0 V
000 . . . 0
–5.000 V
100 . . . 0
5.000 V
100 . . . 0
–0.002 V
111 . . . 1
9.9976 V
111 . . . 1
+0.000 V
000 . . . 0
+2.500 V
010 . . . 0
+4.9976 V
011 . . . 1
*Code center.
OUTPUT ENABLE TRUTH TABLES
12-BIT MODE (12/
8 = HIGH)
INPUTS
OUTPUT
(
CS U OE)
DB11–DB0
1
High Z
0
Enable 12-Bit Output
8-BIT MODE (12/
8 = LOW)
INPUTS
OUTPUTS
R/
L HBE (CS U OE)
DB11 . . . DB4
X
1
High Z
1
0
0 000a b c d
Unipolar
1
0
e f
g h i
j
k l
Mode
0
a b c d e f
g h
0
1
0
i
j
k l
0000
1
0
a aaaab c d
Bipolar
1
0
e f
g h i
j
k 1
Mode
0
a b c d e f
g h
0
1
0
i
j
k l
0000
NOTES
1 = HIGH voltage level.
a = MSB.
0 = LOW voltage level.
1 = LSB.
X = Don’t care.
U = Logical OR.
END-OF-CONVERT
In asynchronous mode, End-of-Convert (EOC) is an open drain
output (requiring a minimum 3 k
pull-up resistor) enabled by
End-of-Convert ENable (
EOCEN). In synchronous mode,
EOC is a three-state output which is enabled by
EOCEN and
CS. See the Conversion Status Truth Table for details. Access
(tBA) and float (tFD) timing specifications do not apply in asyn-
chronous mode where they are a function of the time constant
formed by the 10 pF output capacitance and the pull-up
resistor.
START CONVERSION TRUTH TABLE
INPUTS
SYNC
CS
SC
STATUS
1
X
No Conversion
Synchronous
1
0
Start Conversion
Mode
1
0
Start Conversion
(Not Recommended)
1
0
Continuous Conversion
(Not Recommended)
0
X
1
No Conversion
Asynchronous
0
X
Start Conversion
Mode
0
X
0
Continuous Conversion
(Not Recommended)
NOTES
1 = HIGH voltage level.
0 = LOW voltage level.
X = Don’t care.
X = HIGH to LOW transition. Must stay low for t = tCP.
CONVERSION STATUS TRUTH TABLE
INPUTS
OUTPUT
SYNC
CS EOCEN EOC
STATUS
1
0
Converting
1
0
1
Not Converting
Synchronous
1
X
High Z
Either
Mode
1
X
1
High Z
Either
0
X
0
Converting
Asynchronous 0
X
0
High Z
Not Converting
Mode*
0
X
1
High Z
Either
NOTES
l = HIGH voltage level.
0 = LOW voltage level.
X = Don’t care.
*EOC requires a pull-up resistor in asynchronous mode.
相關(guān)PDF資料
PDF描述
AD1555BPZRL IC ADC PGA 24BIT LN 28-PLCC
VI-26M-MX-F1 CONVERTER MOD DC/DC 10V 75W
AD678AJ IC ADC 12BIT 200KSPS 44-JLCC
IDT72V3611L15PF8 IC FIFO SYNC 64X36 15NS 120-TQFP
MS27468T21A16P CONN RCPT 16POS JAM NUT W/PINS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD678BJ 功能描述:IC ADC 12BIT SAMPLING 44-JLCC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:-
AD678JD 功能描述:IC ADC 12BIT SAMPLING 28-CDIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:250 系列:- 位數(shù):12 采樣率（每秒）:1.8M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:1.82W 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-LQFP 供應(yīng)商設(shè)備封裝:48-LQFP（7x7） 包裝:管件 輸入數(shù)目和類型:2 個(gè)單端，單極
AD678JN 制造商:Analog Devices 功能描述:ADC Single Flash 200ksps 12-bit Parallel 28-Pin PDIP W 制造商:Rochester Electronics LLC 功能描述:IC - 12-BIT SAMPLING ADC - Bulk 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR ((NS))
AD678JNZ 功能描述:IC ADC 12BIT SAMPLING 28-DIP 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 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極
AD678JP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 12-Bit
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*