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參數(shù)資料
| 型號： | ADC10662CIWM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | ADC |
| 英文描述： | RES 12-OHM 5% 0.25W 200PPM THK-FILM SMD-1206 TR-7-PA |
| 中文描述： | 2-CH 10-BIT FLASH/SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO24 |
| 封裝： | SO-24 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 274K |
| 代理商： | ADC10662CIWM |
Applications Information
(Continued)
An A/D converter’s AC performance can be measured using
Fast Fourier Transform (FFT) methods. A sinusoidal wave-
form is applied to the A/D converter’s input, and the trans-
form is then performed on the digitized waveform. The re-
sulting spectral plot might look like the ones shown in the
typical performance curves. The large peak is the fundamen-
tal frequency, and the noise and distortion components (if
any are present) are visible above and below the fundamen-
tal frequency. Harmonic distortion components appear at
whole multiples of the input frequency. Their amplitudes are
combined as the square root of the sum of the squares and
compared to the fundamental amplitude to yield the THD
specification. Guaranteed limits for THD are given in the
table of Electrical Characteristics.
Signal-to-noise ratio is the ratio of the amplitude at the fun-
damental frequency to the rms value at all other frequencies,
excluding any harmonic distortion components. Guaranteed
limits are given in the Electrical Characteristics table. An al-
ternative definition of signal-to-noise ratio includes the distor-
tion components along with the random noise to yield a
signal-to-noise-plus-distortion ration, or S/(N + D).
The THD and noise performance of the A/D converter will
change with the frequency of the input signal, with more dis-
tortion and noise occurring at higher signal frequencies. One
way of describing theA/D’s performance as a function of sig-
nal frequency is to make a plot of “effective bits” versus fre-
quency. An ideal A/D converter with no linearity errors or
self-generated noise will have a signal-to-noise ratio equal to
(6.02n + 1.76) dB, where n is the resolution in bits of the A/D
converter. A real A/D converter will have some amount of
noise and distortion, and the effective bits can be found by:
where S/(N + D) is the ratio of signal to noise and distortion,
which can vary with frequency.
As an example, an ADC10662 with a 4.85 V
P-P
, 100 kHz
sine
wave
input
signal
signal-to-noise-plus-distortion ratio of 59.2 dB, which is
equivalent to 9.54 effective bits. As the input frequency in-
creases, noise and distortion gradually increase, yielding a
plot of effective bits or S/(N + D) as shown in the typical per-
formance curves.
will
typically
have
a
8.0 SPEED ADJUST
The speed adjust pin is connected to an on-chip current
source that determines the converter’s internal timing. By
connecting a resistor between the speed adjust pin and
ground as shown in Figure 4 the internal programming cur-
rent is increased, which reduces the conversion time. The
ADC10662 and ADC10664 are specified and guaranteed for
operation with R
= 14.0 k
(Mode 1) or R
= 8.26k
(Mode 2). Smaller resistors will result in faster conversion
times, but linearity will begin to degrade as R
SA
becomes
smaller (see curves).
www.national.com
12
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| ADC10664CIWM | 10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC10662CIWM/NOPB | 功能描述:IC ADC 10BIT 360 NS 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
| ADC10662CIWMX | 功能描述:IC ADC 10BIT 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
| ADC10662CIWMX/NOPB | 制造商:Texas Instruments 功能描述:ADC Single Pipelined 1.5Msps 10-bit Parallel 24-Pin SOIC W T/R |
| ADC10662CMJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| ADC10664 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold |
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