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參數(shù)資料
| 型號(hào)： | TDA8768AH/5 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | ADC |
| 英文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44 |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 1434K |
| 代理商： | TDA8768AH/5 |
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Philips Semiconductors
TDA8768A
12-bit, 70 Msps Analog-to-Digital Converter (ADC)
Product data
Rev. 02 — 03 July 2002
24 of 32
9397 750 09656
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
12.1.2
Dynamic parameters (single tone)
conforming to coherent sampling (ft/fs = M/N, where M is the number of cycles and N
is number of samples, M and N being relatively prime), and digitized by the ADC
under test.
Remark: in the following equations, Pnoise is the power of the terms which include the
effects of random noise, non-linearities, sampling time errors, and “quantization
noise”.
Signal-to-noise and distortion (SINAD): The ratio of the output signal power to the
noise plus distortion power for a given sample rate and input frequency, excluding the
DC component:
Effective Number of Bits (ENOB): It is derived from SINAD and gives the
theoretical resolution an ideal ADC would require to obtain the same SINAD
measured on the real ADC. A good approximation gives:
Total Harmonic Distortion (THD): The ratio of the power of the harmonics to the
power of the fundamental. For k-1 harmonics the THD is:
where
The value of k is usually 6 (i.e. calculation of THD is done on the rst 5 harmonics).
Fig 26. Spectrum of full-scale input sine wave with frequency ft.
magnitude
fs/2
SFDR
a1
a2
a3
ak
s
FCE710
measured output range
SINAD db
[]
10
P
signal
P
noise
distortion
+
------------------------------------------
log
=
ENOB
SINAD dB
[]
176
()
–
() 602
()
=
THD dB
[]
10
P
harmonics
P
signal
---------------------------
log
=
P
harmonics
a
2
a
3
2
a
k
2
++
=
P
signal
a
1
2
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8768AH7 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12-bit, 70 Msps Analog-to-Digital Converter (ADC) |
| TDA8768H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12-bit high-speed Analog-to-Digital Converter ADC |
| TDA8768H/4 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12-bit high-speed Analog-to-Digital Converter ADC |
| TDA8768H/5 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12-bit high-speed Analog-to-Digital Converter ADC |
| TDA8769 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12-bit, 60/80/105 Msps Analog-to-Digital Converter (ADC) Nyquist/high IF sampling |
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