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參數(shù)資料
| 型號： | LTC2362HTS8#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 500KSPS TSOT23-8 |
| 標準包裝： | 2,500 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 500k |
| 數(shù)據(jù)接口： | MICROWIRE?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 7.2mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-8 薄型，TSOT-23-8 |
| 供應(yīng)商設(shè)備封裝： | TSOT-23-8 |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
| 配用： | DC1190A-C-ND - BOARD SAR ADC LTC2362 |
LTC2360/LTC2361/LTC2362
13
236012fa
APPLICATIONS INFORMATION
Intermodulation Distortion
If the ADC input signal consists of more than one spectral
component, the ADC transfer function nonlinearity can
produce intermoduation 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 function
can create distortion products at the sum and difference
frequencies of mfa ± nfb, where m and n = 0, 1, 2, 3, etc.
For example, the 2nd order IMD terms include (fa ± fb).
If the two input sine waves are equal in magnitude, the
value (in decibels) of the 2nd order IMD products can be
expressed by the following formula:
IMD f
a ± fb
()=20log
Amplitude at f
a ± fb
()
Amplitude at f
a
Peak Harmonic or Spurious Noise
The peak harmonic or spurious noise 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.
Full-Power and Full-Linear Bandwidth
The full-power bandwidth is that input frequency at which
the amplitude of reconstructed fundamental is reduced by
3dB for full-scale input signal.
The full-linear bandwidth is the input frequency at which the
SINAD has dropped to 68dB (11 effective bits). The LTC2362
has been designed to optimize input bandwidth, allowing the
ADC to undersample input signals with frequencies above
the converter’s Nyquist frequency. The noise oor stays
very low at high frequencies; SINAD becomes dominated
by distortion at frequencies far beyond Nyquist.
Figure 9. LTC2362 Intermodulation Distortion Plot
INPUT FREQUENCY (kHz)
0
MAGNITUDE
(dB)
0
–20
–60
–100
–40
–80
–120
100
200
236012 F09
250
50
150
VDD = 3.6V
fSMPL = 500ksps
fa = 99kHz
fb = 101kHz
IMD = –76.5dB
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