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參數(shù)資料
| 型號： | AD774B |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | Complete 12-Bit A/D Converters(完備的12位A/D轉(zhuǎn)換器) |
| 中文描述： | 完整的12位A / D轉(zhuǎn)換器（完備的12位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 335K |
| 代理商： | AD774B |
AD674B/AD774B
REV. B
–7–
AD674B AND AD774B PIN DESCRIPTION
Symbol
Pin No.
Type
Name and Function
AGND
A
0
9
4
P
DI
Analog Ground (Common).
Byte Address/Short Cycle. If a conversion is started with A
0
Active LOW, a full 12-bit conversion
cycle is initiated. If A
0
is Active HIGH during a convert start, a shorter 8-bit conversion cycle
results. During Read (R/
C
= 1) with 12/
8
LOW, A
0
= LOW enables the 8 most significant bits,
and A
0
= HIGH enables DB3-DB0 and sets DB7-DB4 = 0.
Bipolar Offset. Connect through a 50
resistor to REF OUT for bipolar operation or to Analog
Common for unipolar operation.
Chip Enable. Chip Enable is Active HIGH and is used to initiate a convert or read operation.
Chip Select. Chip Select is Active LOW.
Data Bits 11 through 8. In the 12-bit format (see 12/
8
and A
0
pins), these pins provide the upper
4 bits of data. In the 8-bit format, they provide the upper 4 bits when A
0
is LOW and are
disabled when A
0
is HIGH.
Data Bits 7 through 4. In the 12-bit format these pins provide the middle 4 bits of data. In the
8-bit format they provide the middle 4 bits when A
0
is LOW and all zeroes when A
0
is HIGH.
Data Bits 3 through 0. In both the 12-bit and 8-bit format these pins provide the lower 4 bits of
data when A
0
is HIGH; they are disabled when A
0
is LOW.
Digital Ground (Common).
+10 V Reference Output.
Read/Convert. In the full control mode R/
C
is Active HIGH for a read operation and Active LOW
for a convert operation. In the stand-alone mode, the falling edge of R/
C
initiates a conversion.
Reference Input is connected through a 50
resistor to +10 V Reference for normal operation.
Status is Active HIGH when a conversion is in progress and goes LOW when the conversion is
completed.
+12 V/+15 V Analog Supply.
–12 V/–15 V Analog Supply.
+5 V Logic Supply.
10 V Span Input, 0 to +10 V unipolar mode or –5 V to +5 V bipolar mode. When using the
20 V Span, 10 V
IN
should not be connected.
20 V Span Input, 0 to +20 V unipolar mode or –10 V to +10 V bipolar mode. When using the
10 V Span, 20 V
IN
should not be connected.
The 12/
8
pin determines whether the digital output data is to be organized as two 8-bit words
(12/
8
LOW) or a single 12-bit word (12/
8
HIGH).
BIP OFF
12
AI
CE
CS
DB11-DB8
6
3
27-24
DI
DI
DO
DB7-DB4
23-20
DO
DB3-DB0
19-16
DO
DGND
REF OUT
R/
C
15
8
5
P
AO
DI
REF IN
STS
10
28
AI
DO
V
CC
V
EE
V
LOGIC
10 V
IN
7
11
1
13
P
P
P
AI
20 V
IN
14
AI
12/
8
2
DI
TYPE:
AI =
AO =
DI =
DO =
P =
Analog Input
Analog Output
Digital Input
Digital Output
Power
AGND
CS
R/C
CE
REF OUT
REF IN
BIP OFF
DGND
DB0 (LSB)
DB1
DB2
DB3
DB4
DB7
DB6
DB5
DB8
DB9
DB10
DB11 (MSB)
STS
V
LOGIC
TOP VIEW
(Not to Scale)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AD674B
or
AD774B
V
CC
V
EE
10V
IN
20V
IN
12/8
A
0
_
_
PIN CONFIGURATION
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD774BAD | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD774BAR | 功能描述:IC ADC 12BIT W/BUFF REF 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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 個單端，雙極 |
| AD774BARZ | 功能描述:IC ADC 12BIT W/BUFF REF 28-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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 個單端，雙極 |
| AD774BBD | 功能描述:IC ADC 12BIT W/BUFF REF 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:- 標準包裝: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 個單端，雙極 |
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