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參數資料
| 型號： | AD7880 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Enclosed Switches Series LS: Rod - Adjustable; 1NC 1NO DPDT Snap Action, Double Break; 0.5 in - 14NPT conduit; Plug-in |
| 中文描述： | LC2MOS單5伏電源，低功耗，12位采樣ADC |
| 文件頁數： | 4/16頁 |
| 文件大小： | 337K |
| 代理商： | AD7880 |
AD7880
–4–
REV. 0
PIN FUNCT ION DE SCRIPT ION
Pin
No.
Pin
Mnemonic
Function
1
2
3
4
5
6
V
INA
V
INB
AGND
V
REF
CS
CONVST
Analog Input.
Analog Input.
Analog Ground.
Voltage Reference Input. T his is normally tied to V
DD
.
Chip Select. Active Low Logic input. T he device is selected when this input is active.
Convert Start. A low to high transition on this input puts the track/hold into hold mode and starts con-
version. T his input is asynchronous to the CLK IN and is independent of
CS
and
RD
.
Read. Active Low Logic Input. T his input is used in conjunction with
CS
low to enable data outputs.
Active Low Logic Output. T his status line indicates converter status.
BUSY
is low during conversion.
Clock Input. T T L-compatible logic input. Used as the clock source for the A/D converter. T he mark/
space ratio of the clock can vary from 40/60 to 60/40.
Digital Ground.
DB0–DB11 T hree-State Data Outputs. T hese become active when
CS
and
RD
are brought low.
MODE
MODE Input. T his input is used to put the device into the power save mode (MODE = 0 V). During
normal operation, the MODE input will be a logic high (MODE = V
DD
).
V
DD
Power Supply. T his is nominally +5 V.
7
8
9
RD
BUSY
CLK IN
10
11 . . . 22
23
DGND
24
ORDE RING GUIDE
Bipolar
Zero
E rror
(LSBs)
Full-Scale
E rror
(LSBs)
T emperature
Range
Package
Option*
Model
AD7880BN
AD7880BQ
AD7880CN
AD7880CQ
AD7880BR
AD7880CR
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
±
15
±
15
±
5
±
5
±
15
±
5
±
10
±
10
±
5
±
5
±
10
±
5
N-24
Q-24
N-24
Q-24
R-24
R-24
*N = Plastic DIP; Q = Cerdip; R = SOIC (Small Outline Integrated Circuit).
PIN CONFIGURAT ION
TOP VIEW
(Not to Scale)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
24
23
22
21
20
19
18
17
16
15
AD7880
AGND
CLKIN
DGND
DB0
DB1
DB2
DB3
DB4
DB5
DB6
V
DD
DB8
V
INA
V
INB
DB7
DB9
DB10
DB11
MODE
CS
CONVST
RD
BUSY
V
REF
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