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參數(shù)資料
| 型號： | LTC1603 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | High Speed, 16-Bit, 250ksps Sampling A/D Converter with Shutdown |
| 中文描述： | 高速，16位，250ksps的采樣與關(guān)機(jī)的A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 18/20頁 |
| 文件大?。?/td> | 250K |
| 代理商： | LTC1603 |
18
LTC1603
1603f
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,
APPLICATIO
S I
FOR
ATIO
U
W
U
U
etc. For example, the 2nd order IMD terms include
(fa – fb). If the two input sine waves are equal in magni-
tude, the value (in decibels) of the 2nd order IMD products
can be expressed by the following formula:
IMD fa
fb
LogAmplitude
20
±
(
)
=
±
at (fa
fb)
Amplitude at fa
Peak Harmonic or Spurious Noise
The peak harmonic or spurious noise is the largest spec-
tral 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 the reconstructed fundamental is
reduced by 3dB for a full-scale input signal.
The full-linear bandwidth is the input frequency at which
the S/(N + D) has dropped to 84dB (13.66 effective bits).
The LTC1603 has been designed to optimize input band-
width, allowing the ADC to undersample input signals with
frequencies above the converter’s Nyquist Frequency. The
noise floor stays very low at high frequencies; S/(N + D)
becomes dominated by distortion at frequencies far
beyond Nyquist.
Figure 21. Intermodulation Distortion Plot
FREQUENCY (kHz)
0
20
A
80
100
0
–20
–40
–60
–80
–100
–120
–140
1603 F21
40
60
120
f
SAMPLE
= 250kHz
f
IN1
f
IN2
= 32.4kHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1603CG | High Speed, 16-Bit, 250ksps Sampling A/D Converter with Shutdown |
| LTC1603IG | High Speed, 16-Bit, 250ksps Sampling A/D Converter with Shutdown |
| LTC1604CG | Quadruple 2-Input Exclusive-OR Gates 14-PDIP 0 to 70 |
| LTC1604I | High Speed, 16-Bit, 333ksps Sampling A/D Converter with Shutdown |
| LTC1604IG | Quadruple 2-Input Exclusive-OR Gates 14-PDIP 0 to 70 |
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參數(shù)描述 |
|---|---|
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| LTC1603IG | 功能描述:IC CONV A/D 16BIT 250KSPS 36SSOP RoHS:否 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:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
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