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參數(shù)資料
| 型號： | LTC2283IUP#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Dual 12-Bit, 125Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: -40°C to +85°C |
| 中文描述： | DUAL 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64 |
| 封裝： | 9 X 9 MM, PLASTIC, MO-220WNJR-5, QFN-64 |
| 文件頁數(shù)： | 3/24頁 |
| 文件大小： | 587K |
| 代理商： | LTC2283IUP#TR |
LTC2283
11
2283fb
DYNAMIC PERFORMANCE
Signal-to-Noise Plus Distortion Ratio
The signal-to-noise plus distortion ratio [S/(N + D)] is
the ratio between the RMS amplitude of the fundamen-
tal input frequency and the RMS amplitude of all other
frequency components at the ADC output. The output is
band limited to frequencies above DC to below half the
sampling frequency.
Signal-to-Noise Ratio
The signal-to-noise ratio (SNR) is the ratio between the
RMS amplitude of the fundamental input frequency and
the RMS amplitude of all other frequency components
except the rst ve harmonics and DC.
Total Harmonic Distortion
Total harmonic distortion is the ratio of the RMS sum
of all harmonics of the input signal to the fundamental
itself. The out-of-band harmonics alias into the frequency
band between DC and half the sampling frequency. THD
is expressed as:
THD
= 20log
(V2
2 + V32 + V42 +...Vn2)/V1
where V1 is the RMS amplitude of the fundamental fre-
quency and V2 through Vn are the amplitudes of the second
through nth harmonics. The THD calculated in this data
sheet uses all the harmonics up to the fth.
Intermodulation Distortion
If the ADC input signal consists of more than one spectral
component, the ADC transfer function nonlinearity can
produce intermodulation distortion (IMD) in addition to
THD. IMD is the change in one sinusoidal input caused
by the presence of another sinusoidal input at a different
frequency.
If two pure sine waves of frequencies fa and fb are ap-
plied to the ADC input, nonlinearities in the ADC transfer
function can create distortion products at the sum and
difference frequencies of mfa ± nfb, where m and n = 0,
1, 2, 3, etc. The 3rd order intermodulation products are
APPLICATIONS INFORMATION
2fa + fb, 2fb + fa, 2fa – fb and 2fb – fa. The intermodula-
tion distortion is dened as the ratio of the RMS value of
either input tone to the RMS value of the largest 3rd order
intermodulation product.
Spurious Free Dynamic Range (SFDR)
Spurious free dynamic range is the peak harmonic or spuri-
ous noise that is the largest spectral component excluding
the input signal and DC. This value is expressed in decibels
relative to the RMS value of a full-scale input signal.
Input Bandwidth
The input bandwidth is that input frequency at which the
amplitude of the reconstructed fundamental is reduced
by 3dB for a full scale input signal.
Aperture Delay Time
The time from when CLK reaches midsupply to the in-
stant that the input signal is held by the sample and hold
circuit.
Aperture Delay Jitter
The variation in the aperture delay time from conversion
to conversion. This random variation will result in noise
when sampling an AC input. The signal to noise ratio due
to the jitter alone will be:
SNRJITTER = –20log (2π fIN tJITTER)
Crosstalk
Crosstalk is the coupling from one channel (being driven
by a full-scale signal) onto the other channel (being driven
by a –1dBFS signal).
CONVERTER OPERATION
As shown in Figure 1, the LTC2283 is a dual CMOS pipelined
multistep converter. The converter has six pipelined ADC
stages; a sampled analog input will result in a digitized
value ve cycles later (see the Timing Diagram section).
For optimal AC performance the analog inputs should be
driven differentially. For cost sensitive applications, the
analog inputs can be driven single-ended with slightly
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2283IUP-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 12-Bit, 125Msps Low Power 3V ADC |
| LTC2283UP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 12-Bit, 125Msps Low Power 3V ADC |
| LTC2284 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 14-Bit, 105Msps Low Power 3V ADC |
| LTC2284CUP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 14-Bit, 105Msps Low Power 3V ADC |
| LTC2284CUP#PBF | 功能描述:IC ADC DUAL 14BIT 105MSPS 64-QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:250 系列:- 位數(shù):12 采樣率（每秒）:1.8M 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:1.82W 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-LQFP 供應商設備封裝:48-LQFP（7x7） 包裝:管件 輸入數(shù)目和類型:2 個單端，單極 |
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