參數(shù)資料
型號： LTC2205UK-14
廠商： Linear Technology Corporation
英文描述： 14-Bit, 65Msps ADC
中文描述： 14位，型號各有不同的模數(shù)轉(zhuǎn)換器
文件頁數(shù)： 22/28頁
文件大?。?/td> 1563K
代理商： LTC2205UK-14
LTC2205-14
22
220514fa
Internal Dither
The LTC2205-14 is a 14-bit ADC with a very linear transfer
function; however, at low input levels even slight imperfec-
tions in the transfer function will result in unwanted tones.
Small errors in the transfer function are usually a result
of ADC element mismatches. An optional internal dither
mode can be enabled to randomize the input location on
the ADC transfer curve, resulting in improved SFDR for
low signal levels.
As shown in Figure 14, the output of the sample-and-hold
amplifier is summed with the output of a dither DAC. The
dither DAC is driven by a long sequence pseudo-random
number generator; the random number fed to the dither
DAC is also subtracted from the ADC result. If the dither
DAC is precisely calibrated to the ADC, very little of the
dither signal will be seen at the output. The dither signal
that does leak through will appear as white noise. The dither
DAC is calibrated to result in less than 0.5dB elevation
in the noise floor of the ADC, as compared to the noise
floor with dither off.
APPLICATIONS INFORMATION
Figure 13. Descrambling a Scrambled Digital Output
Figure 14. Functional Equivalent Block Diagram of Internal Dither Circuit
+
–
AIN
–
AIN
+
S/H
AMP
DIGITAL
SUMMATION
OUTPUT
DRIVERS
MULTIBIT DEEP
PSEUDO-RANDOM
NUMBER
GENERATOR
14-BIT
PIPELINED
ADC CORE
PRECISION
DAC
CLOCK/DUTY
CYCLE
CONTROL
CLKOUT
OF
D13
D0
ENC
DITHER ENABLE
HIGH = DITHER ON
LOW = DITHER OFF
DITH
ENC
ANALOG
INPUT
220514 F14
LTC2205-14
D1
D0
D2
D12
D13
LTC2205-14
PC BOARD
FPGA
CLKOUT
OF
D13/D0
D12/D0
D2/D0
D1/D0
D0
22054 F13
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2206 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 20Msps Low Power ADC
LTC2206CUK 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 105Msps/80Msps ADCs
LTC2206CUK#PBF 制造商:Linear Technology 功能描述:Single ADC Pipelined 80Msps 16-bit Parallel 48-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16-BIT 80MSPS 48-QFN 制造商:Linear Technology 功能描述:MS-ADC/High Speed, 16-bit, 80Msps ADC 制造商:Linear Technology 功能描述:IC, ADC, 16BIT, 80MSPS, QFN-48, Resolution (Bits):16bit, Sampling Rate:80MSPS, Supply Voltage Type:Single, Supply Voltage Min:3.135V, Supply Voltage Max:3.465V, Supply Current:220mA, Digital IC Case Style:QFN, No. of Pins:48 , RoHS Compliant: Yes
LTC2206CUK#TRPBF 制造商:Linear Technology 功能描述:IC ADC 16-BIT 80MSPS 48-QFN
LTC2206CUK-14 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit, 105Msps/80Msps ADCs
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