Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

AD7853AR Folha de dados(PDF) 8 Page - Analog Devices

Nome de Peças AD7853AR
Descrição Electrónicos  3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
Download  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD7853AR Folha de dados(HTML) 8 Page - Analog Devices

Back Button AD7853AR Datasheet HTML 4Page - Analog Devices AD7853AR Datasheet HTML 5Page - Analog Devices AD7853AR Datasheet HTML 6Page - Analog Devices AD7853AR Datasheet HTML 7Page - Analog Devices AD7853AR Datasheet HTML 8Page - Analog Devices AD7853AR Datasheet HTML 9Page - Analog Devices AD7853AR Datasheet HTML 10Page - Analog Devices AD7853AR Datasheet HTML 11Page - Analog Devices AD7853AR Datasheet HTML 12Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 34 page
background image
REV. B
–8–
AD7853/AD7853L
Total Harmonic Distortion
Total harmonic distortion (THD) is the ratio of the rms sum of
harmonics to the fundamental. For the AD7853/AD7853L, it is
defined as:
THD (dB)
= 20 log
(V 2
2 +V
3
2 +V
4
2 +V
5
2 +V
6
2
)
V1
where V1 is the rms amplitude of the fundamental and V2, V3,
V4, V5 and V6 are the rms amplitudes of the second through the
sixth harmonics.
Peak Harmonic or Spurious Noise
Peak harmonic or spurious noise is defined as the ratio of the
rms value of the next largest component in the ADC output
spectrum (up to fS/2 and excluding dc) to the rms value of the
fundamental. Normally, the value of this specification is deter-
mined by the largest harmonic in the spectrum, but for parts
where the harmonics are buried in the noise floor, it will be a
noise peak.
Intermodulation Distortion
With inputs consisting of sine waves at two frequencies, fa and
fb, any active device with nonlinearities will create distortion
products at sum and difference frequencies of mfa
± nfb where
m, n = 0, 1, 2, 3, etc. Intermodulation distortion terms are
those for which neither m nor n are equal to zero. For example,
the second order terms include (fa + fb) and (fa – fb), while the
third order terms include (2fa + fb), (2fa – fb), (fa + 2fb) and
(fa – 2fb).
Testing is performed using the CCIF standard where two input
frequencies near the top end of the input bandwidth are used. In
this case, the second order terms are usually distanced in fre-
quency from the original sine waves while the third order terms
are usually at a frequency close to the input frequencies. As a
result, the second and third order terms are specified separately.
The calculation of the intermodulation distortion is as per the
THD specification where it is the ratio of the rms sum of the
individual distortion products to the rms amplitude of the sum
of the fundamentals expressed in dBs.
TERMINOLOGY
Integral Nonlinearity
This is the maximum deviation from a straight line passing
through the endpoints of the ADC transfer function. The end-
points of the transfer function are zero scale, a point 1/2 LSB
below the first code transition, and full scale, a point 1/2 LSB
above the last code transition.
Differential Nonlinearity
This is the difference between the measured and the ideal 1 LSB
change between any two adjacent codes in the ADC.
Total Unadjusted Error
This is the deviation of the actual code from the ideal code
taking all errors into account (Gain, Offset, Integral Nonlinearity,
and other errors) at any point along the transfer function.
Unipolar Offset Error
This is the deviation of the first code transition (00 . . . 000 to
00 . . . 001) from the ideal AIN(+) voltage (AIN(–) + 1/2 LSB)
when operating in the unipolar mode.
Positive Full-Scale Error
This applies to the unipolar and bipolar modes and is the devia-
tion of the last code transition from the ideal AIN(+) voltage
(AIN(–) + Full Scale – 1.5 LSB) after the offset error has been
adjusted out.
Negative Full-Scale Error
This applies to the bipolar mode only and is the deviation of the
first code transition (10 . . . 000 to 10 . . . 001) from the ideal
AIN(+) voltage (AIN(–) – VREF/2 + 0.5 LSB).
Bipolar Zero Error
This is the deviation of the midscale transition (all 1s to all 0s)
from the ideal AIN(+) voltage (AIN(–) – 1/2 LSB).
Track/Hold Acquisition Time
The track/hold amplifier returns into track mode and the end of
conversion. Track/Hold acquisition time is the time required for
the output of the track/hold amplifier to reach its final value,
within
±1/2 LSB, after the end of conversion.
Signal to (Noise + Distortion) Ratio
This is the measured ratio of signal to (noise + distortion) at the
output of the A/D converter. The signal is the rms amplitude of
the fundamental. Noise is the sum of all nonfundamental sig-
nals up to half the sampling frequency (fS/2), excluding dc. The
ratio is dependent on the number of quantization levels in the
digitization process; the more levels, the smaller the quantiza-
tion noise. The theoretical signal to (noise + distortion) ratio for
an ideal N-bit converter with a sine wave input is given by:
Signal to (Noise + Distortion) = (6.02 N +1.76) dB
Thus for a 12-bit converter, this is 74 dB.


Nº de peça semelhante - AD7853AR

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD7853L AD-AD7853L_15 Datasheet
353Kb / 34P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7853 AD-AD7853_15 Datasheet
353Kb / 34P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
More results

Descrição semelhante - AD7853AR

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD7854ARZ AD-AD7854ARZ Datasheet
264Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7854 AD-AD7854 Datasheet
264Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7853 AD-AD7853_15 Datasheet
353Kb / 34P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7853L AD-AD7853L_15 Datasheet
353Kb / 34P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7854L AD-AD7854L_15 Datasheet
264Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7854 AD-AD7854_15 Datasheet
264Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
REV. B
AD7859 AD-AD7859 Datasheet
535Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs
REV. A
AD7859ASZ AD-AD7859ASZ Datasheet
405Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs
REV. A
AD7859 AD-AD7859_15 Datasheet
405Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs
REV. A
AD7859APZ AD-AD7859APZ Datasheet
405Kb / 28P
   3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs
REV. A
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com