參數資料
| 型號： | LTC1291CCN8 |
| 廠商： | Linear Technology |
| 文件頁數： | 1/20頁 |
| 文件大小： | 0K |
| 描述： | IC DATA ACQ SYSTEM 12BIT 8-DIP |
| 標準包裝： | 50 |
| 類型： | 數據采集系統（DAS） |
| 分辨率（位）： | 12 b |
| 數據接口： | 串行，并聯 |
| 電壓電源： | 單電源 |
| 電源電壓： | 5V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 產品目錄頁面： | 1346 (CN2011-ZH PDF) |
1
LTC1291
1291fa
The LTC
1291 is a data acquisition system that contains
a serial I/O successive approximation A/D converter. It
uses LTCMOS
TM switched capacitor technology to per-
form a 12-bit unipolar A/D conversion. The input multi-
plexer can be configured for either single-ended or differ-
ential inputs. 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 (VCC).
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
KEY SPECIFICATIO S
U
TYPICAL APPLICATIO
U
Single Chip 12-Bit
Data Acquisition System
s
Built-In Sample-and-Hold
s
Single Supply 5V Operation
s
Power Shutdown
s
Direct 3- or 4-Wire Interface to Most MPU Serial
Ports and All MPU Parallel Ports
s
Two-Channel Analog Multiplexer
s
Analog Inputs Common Mode to Supply Rails
s
8-Pin DIP Package
s
Resolution: 12 Bits
s
Fast Conversion Time: 12
s Max Over Temp.
s
Low Supply Current:
6.0mA (Typ) Active Mode
10
A (Max) Shutdown Mode
5V
CH0
GND
DIN
DOUT
CLK
VCC(VREF)
CS
LTC1291
2-CHANNEL
MUX*
CH1
0.1
F
22
F
TANTALUM
*FOR OVERVOLTAGE PROTECTION, LIMIT THE INPUT CURRENT TO 15mA
PER PIN OR CLAMP THE INPUTS TO VCC AND GND WITH 1N4148 DIODES.
CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR
THE OTHER CHANNEL IS OVERVOLTAGED (VIN < GND OR VIN > VCC). SEE
SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION.
1291 TA01
DO
MC68HC11
SCK
MISO
MOSI
+
CODE
0
–0.5
DELTA
(LSB)
–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
2-Channel 12-Bit Data Acquisition System
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