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

X  

AD7894ARZ-3 Datasheet(PDF) 5 Page - Analog Devices

No. de pieza AD7894ARZ-3
Descripción Electrónicos  5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD7894ARZ-3 Datasheet(HTML) 5 Page - Analog Devices

  AD7894ARZ-3 Datasheet HTML 1Page - Analog Devices AD7894ARZ-3 Datasheet HTML 2Page - Analog Devices AD7894ARZ-3 Datasheet HTML 3Page - Analog Devices AD7894ARZ-3 Datasheet HTML 4Page - Analog Devices AD7894ARZ-3 Datasheet HTML 5Page - Analog Devices AD7894ARZ-3 Datasheet HTML 6Page - Analog Devices AD7894ARZ-3 Datasheet HTML 7Page - Analog Devices AD7894ARZ-3 Datasheet HTML 8Page - Analog Devices AD7894ARZ-3 Datasheet HTML 9Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 12 page
background image
AD7894
–5–
REV. 0
TERMINOLOGY
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 rms sum of all nonfundamental
signals up to half the sampling frequency (fS/2), excluding dc.
The ratio is dependent upon the number of quantization levels
in the digitization process; the more levels, the smaller the quan-
tization 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 14-bit converter, this is 86.04 dB.
Total Harmonic Distortion
Total harmonic distortion (THD) is the ratio of the rms sum of
harmonics to the fundamental. For the AD7894, it is defined as:
THD dB
VVV
V
V
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. The value of this specification is normally 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 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 (2 fa + fb), (2 fa – fb), (fa + 2 fb) and (fa – 2 fb).
The AD7894 is tested using two input frequencies. In this case,
the second and third order terms are of different significance.
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 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 fundamental expressed
in dBs.
Relative Accuracy
Relative accuracy or endpoint nonlinearity is the maximum
deviation from a straight line passing through the endpoints of
the ADC transfer function.
Differential Nonlinearity
This is the difference between the measured and the ideal 1 LSB
change between any two adjacent codes in the ADC.
Positive Gain Error (AD7894-10)
This is the deviation of the last code transition (01 . . . 110 to
01 . . . 111) from the ideal (4
× VREF – 1 LSB) after the
Bipolar Zero Error has been adjusted out.
Positive Gain Error (AD7894-3)
This is the deviation of the last code transition (01 . . . 110 to
01 . . . 111) from the ideal (VREF – 1 LSB) after the Bipolar
Zero Error has been adjusted out.
Positive Gain Error (AD7894-2)
This is the deviation of the last code transition (11 . . . 110 to
11 . . . 111) from the ideal (VREF – 1 LSB) after the Unipolar
Offset Error has been adjusted out.
Bipolar Zero Error (AD7894-10, AD7894-3)
This is the deviation of the midscale transition (all 0s to all 1s)
from the ideal 0 V (GND).
Unipolar Offset Error (AD7894-2)
This is the deviation of the first code transition (00 . . . 000 to
00 . . . 001) from the ideal 1 LSB.
Negative Gain Error (AD7894-10)
This is the deviation of the first code transition (10 . . . 000 to
10 . . . 001) from the ideal (–4
× VREF + 1 LSB) after Bipolar
Zero Error has been adjusted out.
Negative Gain Error (AD7894-3)
This is the deviation of the first code transition (10 . . . 000 to
10 . . . 001) from the ideal (– VREF + 1 LSB) after Bipolar
Zero Error has been adjusted out.
Track/Hold Acquisition Time
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 (the point at which the
track/hold returns to track mode). It also applies to situations
where there is a step input change on the input voltage applied
to the VIN input of the AD7894. This means that the user must
wait for the duration of the track/hold acquisition time after the
end of conversion or after a step input change to VIN before
starting another conversion, to ensure that the part operates to
specification.


Número de pieza similar - AD7894ARZ-3

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7894ARZ-2 AD-AD7894ARZ-2 Datasheet
118Kb / 12P
   5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
REV. 0
More results

Descripción similar - AD7894ARZ-3

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7894BRZ-3 AD-AD7894BRZ-3 Datasheet
135Kb / 12P
   5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
REV. 0
AD7894ARZ-2 AD-AD7894ARZ-2 Datasheet
118Kb / 12P
   5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
REV. 0
AD7894 AD-AD7894 Datasheet
131Kb / 12P
   5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
REV. 0
AD7894BRZ-10 AD-AD7894BRZ-10 Datasheet
135Kb / 12P
   5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
REV. 0
AD7894 AD-AD7894_17 Datasheet
167Kb / 13P
   5 V, 14-Bit Serial, ADC in SO-8 Package
AD7894 AD-AD7894_15 Datasheet
135Kb / 12P
   5 V, 14-Bit Serial, 5s ADC in SO-8 Package
REV. 0
AD7895 AD-AD7895 Datasheet
314Kb / 12P
   5 V, 12-Bit, Serial 3.8 ms ADC in 8-Pin Package
REV. 0
AD7895ARZ-10REEL AD-AD7895ARZ-10REEL Datasheet
263Kb / 12P
   5 V, 12-Bit, Serial 3.8 ms ADC in 8-Pin Package
REV. 0
AD7895ARZ-2 AD-AD7895ARZ-2 Datasheet
263Kb / 12P
   5 V, 12-Bit, Serial 3.8 ms ADC in 8-Pin Package
REV. 0
AD7895 AD-AD7895_17 Datasheet
348Kb / 13P
   5 V, 12-Bit, Serial 3.8 ADC in 8-Pin Package
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


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