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LTC1197I

更新时间： 2024-11-21 22:39:47
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 448K
描述
10-Bit, 500ksps ADCs in MSOP with Auto Shutdown

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中文翻译

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LTC1197I 数据手册

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LTC1197/LTC1197L  
LTC1199/LTC1199L  
10-Bit, 500ksps ADCs in  
MSOP with Auto Shutdown  
U
DESCRIPTIO  
EATURE  
S
F
The LTC®1197/LTC1197L/LTC1199/LTC1199L are  
10-bit A/D converters with sampling rates up to 500kHz.  
They have 2.7V (L) and 5V versions and are offered in  
8-pin MSOP and SO packages. Power dissipation is typi-  
cally only 2.2mW at 2.7V (25mW at 5V) during full speed  
operation. The automatic power down reduces supply  
current linearly as sample rate is reduced. These 10-bit,  
switched-capacitor, successive approximation ADCs in-  
clude a sample-and-hold. The LTC1197/LTC1197L have a  
differential analog input with an adjustable reference pin.  
The LTC1199/LTC1199L offer a software-selectable  
2-channel MUX.  
■
■
■
■
8-Pin MSOP and SO Packages  
10-Bit Resolution at 500ksps  
Single Supply: 5V or 3V  
Low Power at Full Speed:  
25mW Typ at 5V  
2.2mW Typ at 2.7V  
Auto Shutdown Reduces Power Linearly  
at Lower Sample Rates  
10-Bit Upgrade to 8-Bit LTC1196/LTC1198  
SPI and MICROWIRETM Compatible Serial I/O  
Low Cost  
■
■
■
■
O U  
The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V  
operation and extremely high sample rate-to-power ratio  
make these ADCs ideal choices for compact, low power  
high speed systems.  
PPLICATI  
A
S
■
■
■
High Speed Data Acquisition  
Portable or Compact Instrumentation  
Low Power or Battery-Operated Instrumentation  
These circuits can be used in ratiometric applications or  
with external references. The high impedance analog  
inputs and the ability to operate with reduced spans below  
1V full scale (LTC1197/LTC1197L) allow direct connec-  
tion to signal sources in many applications, eliminating  
the need for gain stages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
MICROWIRE is a trademark of National Semiconductor Corporation.  
U
O
TYPICAL APPLICATI  
Supply Current vs Sampling Frequency  
Single 2.7V Supply, 250ksps, 10-Bit Sampling ADC  
10000  
1µF  
1000  
2.7V  
V
= 5V  
CC  
= 7.2MHz  
f
CLK  
100  
10  
1
LTC1197L  
1
2
3
4
8
7
6
CS  
V
CC  
SERIAL DATA LINK TO  
ASIC, PLD, MPU, DSP  
OR SHIFT REGISTERS  
V
f
= 2.7V  
= 3.5MHz  
+IN  
–IN  
GND  
CLK  
CC  
CLK  
ANALOG INPUT  
0V TO 2.7V RANGE  
D
OUT  
5
V
REF  
1197/99 TA01  
0.1  
0.01  
0.1  
1
10  
100  
1000  
SAMPLING FREQUENCY (kHz)  
1197/99 G03  
1
1234567...28

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