- 您現(xiàn)在的位置：買賣IC網 > PDF目錄2005 > LTC2205IUK-14#PBF (Linear Technology)IC ADC 14BIT 65MSPS 48-QFN PDF資料下載
參數(shù)資料
| 型號： | LTC2205IUK-14#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 65MSPS 48-QFN |
| 標準包裝： | 52 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 65M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉換器數(shù)目： | 1 |
| 功率耗散（最大）： | 776mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 48-QFN-EP（7x7） |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個差分 |
| 配用： | DC890B-ND - BOARD USB DATA COLLECTION |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LTC2205-14
22
220514fb
Internal Dither
The LTC2205-14 is a 14-bit ADC with a very linear
transfer function; however, at low input levels even
slight imperfections 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
amplier 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 oor of the ADC, as compared to
the noise oor 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PDF資料 |
PDF描述 |
|---|---|
| LTC2207IUK-14#PBF | IC ADC 14BIT 105MSPS 48-QFN |
| LTC2220IUP-1#TRPBF | IC ADC 12BIT 185MSPS 64-QFN |
| LTC2221IUP#TRPBF | IC ADC 12-BIT 135MSPS 64-QFN |
| LTC2222IUK-11#TRPBF | IC ADC 11BIT 105MSPS SAMPL 48QFN |
| LTC2223IUK#TRPBF | IC ADC 12BIT 80MSPS SAMPLE 48QFN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2205IUK-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
| LTC2205IUK-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
| LTC2205IUK-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
| LTC2205UK | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
| LTC2205UK-14 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit, 65Msps ADC |
發(fā)布緊急采購，3分鐘左右您將得到回復。