Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

AD7492BR Datasheet(PDF) 7 Page - Analog Devices

No. de pieza AD7492BR
Descripción Electrónicos  1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD7492BR Datasheet(HTML) 7 Page - Analog Devices

Back Button AD7492BR Datasheet HTML 3Page - Analog Devices AD7492BR Datasheet HTML 4Page - Analog Devices AD7492BR Datasheet HTML 5Page - Analog Devices AD7492BR Datasheet HTML 6Page - Analog Devices AD7492BR Datasheet HTML 7Page - Analog Devices AD7492BR Datasheet HTML 8Page - Analog Devices AD7492BR Datasheet HTML 9Page - Analog Devices AD7492BR Datasheet HTML 10Page - Analog Devices AD7492BR Datasheet HTML 11Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 16 page
background image
REV. 0
AD7492
–7–
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.
Offset Error
This is the deviation of the first code transition (00 . . . 000) to
(00 . . . 001) from the ideal, i.e., AGND + 1 LSB.
Gain Error
The last transition should occur at the analog value 1 1/2 LSB
below the nominal full scale. The first transition is a 1/2 LSB
above the low end of the scale (zero in the case of AD7492).
The gain error is the deviation of the actual difference between
the first and last code transitions from the ideal difference between
the first and last code transitions with offset errors removed.
Track/Hold Acquisition Time
The track/hold amplifier returns into track mode after 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
±0.5 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 signals
up to half the sampling frequency (fS/2), excluding dc. The ratio
is dependent on the number of quantization levels in the digiti-
zation process; the more levels, the smaller the quantization 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 and for a 10-bit con-
verter is 62 dB.
Total Harmonic Distortion
Total harmonic distortion (THD) is the ratio of the rms sum of
harmonics to the fundamental. For the AD7492 it is defined as:
THD dB
VVVVV
V
(
)
log
()
=
++++
20
2
2
3
2
4
2
5
2
6
2
1
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 ADCs
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 is 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).
The AD7492 is tested 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 frequency 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 sepa-
rately. 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.
Aperture Delay
In a sample/hold, the time required after the hold command for
the switch to open fully is the aperture delay. The sample is, in
effect, delayed by this interval, and the hold command would
have to be advanced by this amount for precise timing.
Aperture Jitter
Aperture jitter is the range of variation in the aperture delay. In
other words, it is the uncertainty about when the sample is
taken. Jitter is the result of noise which modulates the phase of
the hold command. This specification establishes the ultimate
timing error, hence the maximum sampling frequency for a
given resolution. This error will increase as the input dV/dt
increases.


Número de pieza similar - AD7492BR

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7492BR-5 AD-AD7492BR-5 Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
AD7492BR-5 AD-AD7492BR-5 Datasheet
374Kb / 25P
   1.25 MSPS, 16 mW Internal REF 12-Bit Parallel ADC
AD7492BR-5-REEL AD-AD7492BR-5-REEL Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
AD7492BR-5-REEL AD-AD7492BR-5-REEL Datasheet
374Kb / 25P
   1.25 MSPS, 16 mW Internal REF 12-Bit Parallel ADC
AD7492BR-5-REEL7 AD-AD7492BR-5-REEL7 Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
More results

Descripción similar - AD7492BR

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7492ARZ AD-AD7492ARZ Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
AD7492 AD-AD7492_15 Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
AD7492BRUZ AD-AD7492BRUZ Datasheet
513Kb / 24P
   1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC
REV. A
AD7492 AD-AD7492_17 Datasheet
374Kb / 25P
   1.25 MSPS, 16 mW Internal REF 12-Bit Parallel ADC
logo
Texas Instruments
ADS9120 TI1-ADS9120 Datasheet
1Mb / 64P
[Old version datasheet]   16-Bit, 2.5-MSPS, 15.5-mW, SAR ADC
logo
Analog Devices
AD7667 AD-AD7667 Datasheet
336Kb / 23P
   16-Bit 1 MSPS SAR Unipolar ADC with Ref
REV. PrA
AD7470 AD-AD7470_15 Datasheet
529Kb / 21P
   1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs
REV. B
AD7470 AD-AD7470_03 Datasheet
325Kb / 20P
   1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs
REV. B
AD7470 AD-AD7470 Datasheet
197Kb / 16P
   1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs
REV. A
AD7472ARZ AD-AD7472ARZ Datasheet
325Kb / 20P
   1.75 MSPS, 4 mW 10-Bit-12-Bit Parallel ADCs
REV. B
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   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