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| 型号： | LTC1297DCN8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC DATA ACQ SYSTEM 12BIT 8-DIP |
| 标准包装： | 50 |
| 类型： | 数据采集系统（DAS） |
| 分辨率（位）： | 12 b |
| 采样率（每秒）： | 60k |
| 数据接口： | 串行，并联 |
| 电压电源： | 单电源 |
| 电源电压： | 5V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 1346 (CN2011-ZH PDF) |
1
LTC1292/LTC1297
12927fb
FEATURES
DESCRIPTIO
U
KEY SPECIFICATIO S
U
TYPICAL APPLICATIO
U
Single Chip 12-Bit
Data Acquisition Systems
s
Resolution: 12 Bits
s
Fast Conversion Time: 12
s Max Over Temp
s
Low Supply Current: 6.0mA
s
Shutdown Supply Current: 5
A (LTC1297)
s
Single Supply 5V Operation
s
Power Shutdown After Each Conversion (LTC1297)
s
Built-In Sample-and-Hold
s
60kHz Maximum Throughput Rate (LTC1292)
s
Direct 3-Wire Interface to Most MPU Serial Ports and
All MPU Parallel Ports
s
Analog Inputs Common Mode to Supply Rails
The LTC
1292/LTC1297 are data acquisition systems that
contain a 12-bit, switched-capacitor successive approxi-
mation A/D, a differential input, sample-and-hold on the
(+) input, and serial I/O. When the LTC1297 is idle between
conversions it automatically powers down reducing the
supply current to 5
A, typically. The LTC1292 is capable
of digitizing signals at a 60kHz rate and with the device’s
excellent AC characteristics, it can be used for DSP appli-
cations. All these features are packaged in an 8-pin DIP
and are made possible using LTCMOSTM switched-capaci-
tor technology.
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 wires.
Because of their accuracy, ease of use and small package
size these devices are well suited for digitizing analog
signals in remote applications where minimum number of
interconnects and power consumption are important.
12-Bit Differential Input Data Acquisition System
+
–
DIFFERENTIAL
INPUTS
COMMON MODE
RANGE
0V TO 5V*
1N4148
VREF
DOUT
CLK
VCC
LTC1297
+IN
GND
CS
–IN
LT1027
4.7
F
TANTALUM
8V TO 40V
1
F
22
F
TANTALUM
DO
MC68HC11
SCK
MISO
*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 ANY INPUT IS OVERVOLTAGED
(VIN < GND OR VIN > VCC). SEE SECTION ON OVERVOLTAGE PROTECTION IN
THE APPLICATIONS INFORMATION.
LTC1292/7 TA01
5V
+
fSAMPLE (Hz)
10
AVERAGE
I
CC
(
A)
100
1000
10000
1
100
10k
LTC1297 TA02
1
10
1k
100k
Power Supply Current
vs Sampling Frequency
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS is trademark of Linear Technology Corporation
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