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LTC2256-12_15 PDF预览

LTC2256-12_15

更新时间: 2024-11-07 01:13:47
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
34页 995K
描述
12-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs

LTC2256-12_15 数据手册

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LTC2258-12  
LTC2257-12/LTC2256-12  
12-Bit, 65/40/25Msps  
Ultralow Power 1.8V ADCs  
FeaTures  
DescripTion  
The LTC®2258-12/LTC2257-12/LTC2256-12 are sam-  
pling 12-bit A/D converters designed for digitizing high  
frequency, wide dynamic range signals. They are perfect  
for demanding communications applications with AC  
performancethatincludes71.1dBSNRand88dBspurious  
n
71.1dB SNR  
n
88dB SFDR  
n
Low Power: 79mW/47mW/34mW  
Single 1.8V Supply  
CMOS, DDR CMOS or DDR LVDS Outputs  
n
n
n
Selectable Input Ranges: 1V to 2V  
free dynamic range (SFDR). Ultralow jitter of 0.17ps  
P-P  
P-P  
RMS  
n
n
n
n
n
n
n
800MHz Full-Power Bandwidth S/H  
Optional Data Output Randomizer  
Optional Clock Duty Cycle Stabilizer  
Shutdown and Nap Modes  
allows undersampling of IF frequencies with excellent  
noise performance.  
DC specs include 0.3LSB INL (typical), 0.1LSB DNL  
(typical) and no missing codes over temperature. The  
Serial SPI Port for Configuration  
transition noise is a low 0.3LSB  
.
RMS  
Pin Compatible 14-Bit and 12-Bit Versions  
40-Pin (6mm × 6mm) QFN Package  
The digital outputs can be either full rate CMOS, double  
data rate CMOS, or double data rate LVDS. A separate  
output power supply allows the CMOS output swing to  
range from 1.2V to 1.8V.  
applicaTions  
n
+
Communications  
The ENC and ENC inputs may be driven differentially  
or single-ended with a sine wave, PECL, LVDS, TTL or  
CMOS inputs. An optional clock duty cycle stabilizer al-  
lows high performance at full speed for a wide range of  
clock duty cycles.  
n
Cellular Base Stations  
n
Software Defined Radios  
n
Portable Medical Imaging  
n
Multi-Channel Data Acquisition  
n
Nondestructive Testing  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Typical applicaTion  
LTC2258-12 2-Tone FFT,  
fIN = 68MHz and 69MHz  
1.8V  
1.2V  
TO 1.8V  
V
DD  
0
OV  
DD  
–10  
–20  
–30  
–40  
–50  
–60  
–70  
D11  
+
12-BIT  
PIPELINED  
ADC CORE  
CMOS  
OR  
LVDS  
CORRECTION  
LOGIC  
ANALOG  
INPUT  
OUTPUT  
DRIVERS  
INPUT  
S/H  
D0  
OGND  
–80  
–90  
CLOCK/DUTY  
CYCLE  
CONTROL  
–100  
–110  
–120  
225812 TA01a  
GND  
0
20  
10  
FREQUENCY (MHz)  
30  
65MHz  
CLOCK  
225812 TA01b  
225812fd  
1
For more information www.linear.com/LTC2258-12  

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