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参数资料
| 型号： | LTC2204I |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| 封装： | 7 X7 MM, PLASTIC, MO-220, QFN-48 |
| 文件页数： | 19/28页 |
| 文件大小： | 804K |
| 代理商： | LTC2204I |
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LTC2205/LTC2204
26
22054p
Internal Dither
The LTC2205/LTC2204 are 16-bit ADCs with very linear
transfer functions; 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.
Figure 13. Descrambling a Scrambled Digital Output
APPLICATIO S I FOR ATIO
WU
U
D1
D0
D2
D14
D15
LTC2205/
LTC2204
PC BOARD
FPGA
CLKOUT
OF
D15/D0
D14/D0
D2/D0
D1/D0
D0
22054 F13
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
16-BIT
PIPELINED
ADC CORE
PRECISION
DAC
ANALOG
SUMMATION
CLOCK/DUTY
CYCLE
CONTROL
CLKOUT
OF
D15
D0
ENC
DITHER ENABLE
HIGH = DITHER ON
LOW = DITHER OFF
DITH
ENC
ANALOG
INPUT
22054 F14
LTC2205/LTC2204
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2205C#PBF | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| LTC2205I#PBF | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| LTC2205I#TRPBF | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| LTC2205I#TR | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| LTC2205I | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2204IUK | 制造商:Linear Technology 功能描述:ADC Single Pipelined 40Msps 16-bit Parallel 48-Pin QFN EP 制造商:Linear Technology 功能描述:MS-ADC/High Speed, 16-bit, 40Msps ADC |
| LTC2204IUK#PBF | 制造商:Linear Technology 功能描述:ADC Single Pipelined 40Msps 16-bit Parallel 48-Pin QFN EP 制造商:Linear Technology 功能描述:Single ADC Pipelined 40Msps 16-bit Parallel 48-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16-BIT 40MSPS 48-QFN 制造商:Linear Technology 功能描述:ADC 16BIT 40MSPS 48QFN 制造商:Linear Technology 功能描述:ADC, 16BIT, 40MSPS, 48QFN 制造商:Linear Technology 功能描述:MS-ADC/High Speed, 16-bit, 40Msps ADC 制造商:Linear Technology 功能描述:IC, ADC, 16BIT, 40MSPS, QFN-48, Resolution (Bits):16bit, Sampling Rate:45MSPS, Supply Voltage Type:Single, Supply Voltage Min:3.135V, Supply Voltage Max:3.465V, Supply Current:145mA, Digital IC Case Style:QFN, No. of Pins:48 , RoHS Compliant: Yes |
| LTC2204IUK#TRPBF | 制造商:Linear Technology 功能描述:ADC Single Pipelined 40Msps 16-bit Parallel 48-Pin QFN EP T/R 制造商:Linear Technology 功能描述:IC ADC 16-BIT 40MSPS 48-QFN |
| LTC2204IUK-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
| LTC2204IUK-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:16-Bit, 65Msps/40Msps |
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