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參數(shù)資料
| 型號： | LTC1291BMJ8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Single Chip 12-Bit Data Acquisition System |
| 中文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP8 |
| 封裝： | CERAMIC, DIP-8 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 376K |
| 代理商： | LTC1291BMJ8 |
1
LTC1291
The LTC1291 is a data acquisition system that contains a
serial I/O successive approximation A/D converter. It uses
LTCMOS
TM
switched capacitor technology to perform a
12-bit unipolar A/D conversion. The input multiplexer can
be configured for either single-ended or differential in-
puts. An on-chip sample-and-hold is included on the “+”
input. When the LTC1291 is idle, it can be powered down
in applications where low power consumption is desired.
An external reference is not required because the LTC1291
takes its reference from the power supply (V
CC
). All these
features are packaged in an 8-pin DIP.
The serial I/O is designed to communicate without external
hardware to most MPU serial ports and all MPU parallel
I/O ports allowing data to be transmitted over three or four
wires. Given the accuracy, ease of use and small package
size, this device is well suited for digitizing analog signals
in remote applications where minimum number of inter-
connects, small physical size, and low power consump-
tion are important.
LTCMOS
TM
is a trademark of Linear Technology Corporation
Single Chip 12-Bit
Data Acquisition System
S
FEATURE
I
Built-In Sample-and-Hold
I
Single Supply 5V Operation
I
Power Shutdown
I
Direct 3- or 4-Wire Interface to Most MPU Serial
Ports and All MPU Parallel Ports
I
Two-Channel Analog Multiplexer
I
Analog Inputs Common Mode to Supply Rails
I
8-Pin DIP Package
D
U
ESCRIPTIO
I
Resolution: 12 Bits
I
Fast Conversion Time: 12
μ
s Max Over Temp.
I
Low Supply Current:
6.0mA (Typ) Active Mode
10
μ
A (Max) Shutdown Mode
KEY SPECIFICATIU
+5V
CH0
GND
D
IN
D
OUT
CLK
V
CC
(V
REF
)
CS
LTC1291
2-CHANNEL
MUX*
CH1
+
0.1μF
22μF
TANTALUM
*FOR OVERVOLTAGE PROTECTION LIMIT THE INPUT CURRENT TO 15mA
PER PIN OR CLAMP THE INPUTS TO V
CC
AND GND WITH 1N4148 DIODES.
CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR
THE OTHER CHANNEL IS OVERVOLTAGED (V
IN
< GND OR V
IN
> V
CC
). SEE
SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION.
1291 TA01
DO
MC68HC11
SCK
MISO
MOSI
2-Channel 12-Bit Data Acquisition System
U
A
O
PPLICATI
TYPICAL
CODE
0
–0.5
D
–0.4
–0.2
–0.1
0
0.5
0.2
1024
2048 2560
1291 TA02
–0.3
0.3
0.4
0.1
512
1536
3072 3584 4096
Channel-to-Channel
INL Matching
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