AD7764 datasheet(10/21 Pages) AD

No. de pieza	AD7764

Descripción Electrónicos	24-Bit 312 kSPS 109dB ADC With On-Chip Buffers Serial Interface

Download	21 Pages

Scroll/Zoom	100%

Fabricante Electrónico	AD [Analog Devices]

Página de inicio	http://www.analog.com

Logo

10 / 21 page

AD7764

Preliminary Technical Data

Rev. PrC | Page 10 of 21

TERMINOLOGY

Signal-to-Noise Ratio (SNR)

The ratio of the rms value of the actual input signal to the rms

sum of all other spectral components below the Nyquist fre-

quency, excluding harmonics and dc. The value for SNR is

expressed in decibels.

Total Harmonic Distortion (THD)

The ratio of the rms sum of harmonics to the fundamental.

For the AD7763, it is defined as

()

1

6

5

4

3

2

V

THD

2

log

20

dB

+

=

where:

V1

is the rms amplitude of the fundamental.

V2

, V3, V4, V5, and V6 are the rms amplitudes of the second

to the sixth harmonics.

Nonharmonic Spurious-Free Dynamic Range (SFDR)

The ratio of the rms signal amplitude to the rms value of the

peak spurious spectral component, excluding harmonics.

Dynamic Range

The ratio of the rms value of the full scale to the rms noise

measured with the inputs shorted together. The value for

dynamic range is expressed in decibels.

Intermodulation Distortion

With inputs consisting of sine waves at two frequencies, fa

and fb, any active device with nonlinearities creates distortion

products at sum and difference frequencies of mfa ± nfb, where

m, n = 0, 1, 2, 3, and so on. Intermodulation distortion terms

are those for which neither m nor n are equal to 0. 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 AD7764 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

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 dB.

Integral Nonlinearity (INL)

The maximum deviation from a straight line passing through

the endpoints of the ADC transfer function.

Differential Nonlinearity (DNL)

The difference between the measured and the ideal 1 LSB

change between any two adjacent codes in the ADC.

Zero Error

The zero error is the difference between the ideal midscale

input voltage (when both inputs are shorted together) and the

actual voltage producing the midscale output code.

Zero Error Drift

The change in the actual zero error value due to a temperature

change of 1°C. It is expressed as a percentage of full scale at room

temperature.

Gain Error

The first transition (from 100…000 to 100…001) should occur

for an analog voltage 1/2 LSB above the nominal negative full

scale. The last transition (from 011…110 to 011…111) should

occur for an analog voltage 1 1/2 LSB below the nominal full

scale. The gain error is the deviation of the difference between

the actual level of the last transition and the actual level of the

first transition, from the difference between the ideal levels.

Gain Error Drift

The change in the actual gain error value due to a temperature

change of 1°C. It is expressed as a percentage of full scale at room

temperature.

Número de pieza similar - AD7764

Fabricante Electrónico	No. de pieza	Datasheet	Descripción Electrónicos
Analog Devices	AD7764	1Mb / 32P	24-Bit, 312 kSPS, 109 dB 誇-? ADC with On-Chip Buffers and Serial Interface REV. 0
	AD7764	2Mb / 24P	24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs REV. 0
	AD7764	920Kb / 34P	24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC
	AD7764BRUZ	1Mb / 32P	24-Bit, 312 kSPS, 109 dB 誇-? ADC with On-Chip Buffers and Serial Interface REV. 0
	AD7764BRUZ	920Kb / 34P	24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC

More results

Descripción similar - AD7764

Fabricante Electrónico	No. de pieza	Datasheet	Descripción Electrónicos
Analog Devices	AD7764	1Mb / 32P	24-Bit, 312 kSPS, 109 dB 誇-? ADC with On-Chip Buffers and Serial Interface REV. 0
	AD7765	330Kb / 21P	24-Bit, 156 kSPS,112dB ADC, With On-Chip Buffers, Serial Interface Rev. PrC
	AD7763	688Kb / 32P	24-Bit, 625 kSPS, 109 dB 誇-? ADC with On-Chip Buffers, Serial Interface REV. 0
	AD7765	1Mb / 32P	24-Bit, 156 kSPS, 112 dB 誇-? ADC with On-Chip Buffers and Serial Interface REV. 0
	AD7763	822Kb / 33P	24-Bit, 625 kSPS, 109 dB Sigma-Delta ADC with On-Chip Buffers, Serial Interface REV. B
	AD7763	642Kb / 33P	Sigma-Delta ADC with On-Chip Buffers, Serial Interface
	AD7764	1Mb / 33P	24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC REV. A
	AD7764	920Kb / 34P	24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC
	AD7765	881Kb / 33P	Sigma-Delta ADC On-Chip Buffers and Serial Interface
	AD7762	591Kb / 28P	625 kSPS, 24-Bit, 109 dB ADC With On-Chip Buffer REV. 0

More results

AD7764 Datasheet(PDF) 10 Page - Analog Devices

AD7764 Datasheet(HTML) 10 Page - Analog Devices

Número de pieza similar - AD7764

Descripción similar - AD7764

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Datasheet Descarga

Enlace URL