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| 型號： | LTC2280IUP#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Dual 10-Bit, 105Msps Low Noise 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: -40°C to +85°C |
| 中文描述： | DUAL 1-CH 10-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?。?/td> | 700K |
| 代理商： | LTC2280IUP#TR |
LTC2280
11
2280fa
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 fundamental 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 first five 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 (
√(V22 + 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 fifth.
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 applied
to the ADC input, nonlinearities in the ADC transfer func-
tion can create distortion products at the sum and differ-
ence frequencies of mfa
± nfb, where m and n = 0, 1, 2, 3,
etc. The 3rd order intermodulation products are 2fa + fb,
APPLICATIO S I FOR ATIO
WU
UU
2fb + fa, 2fa – fb and 2fb – fa. The intermodulation
distortion is defined 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
spurious 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 instant
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 LTC2280 is a dual CMOS
pipelined multistep converter. The converter has six
pipelined ADC stages; a sampled analog input will result in
a digitized value five cycles later (see the Timing Diagram
section). For optimal AC performance the analog inputs
should be driven differentially. For cost sensitive
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2281CUP | Dual 10-Bit, 125Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: 0°C to +70°C |
| LTC2281CUP#TR | Dual 10-Bit, 125Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: 0°C to +70°C |
| LTC2281IUP | Dual 10-Bit, 125Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: -40°C to +85°C |
| LTC2281IUP#TR | Dual 10-Bit, 125Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: -40°C to +85°C |
| LTC2282CUP | Dual 12-Bit, 105Msps Low Power 3V ADC; Package: QFN; No of Pins: 64; Temperature Range: 0°C to +70°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2280UP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 105Msps Low Noise 3V ADC |
| LTC2281 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 125Msps Low Power 3V ADC |
| LTC2281CUP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 125Msps Low Power 3V ADC |
| LTC2281CUP#PBF | 功能描述:IC ADC DUAL 10BIT 125MSPS 64QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
| LTC2281CUP#TRPBF | 功能描述:IC ADC DUAL 10BIT 125MSPS 64QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
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