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

X  

AD1865N Folha de dados(PDF) 4 Page - Analog Devices

Nome de Peças AD1865N
Descrição Electrónicos  Complete Dual 18-Bit 16 x FS Audio DAC
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD1865N Folha de dados(HTML) 4 Page - Analog Devices

  AD1865N Datasheet HTML 1Page - Analog Devices AD1865N Datasheet HTML 2Page - Analog Devices AD1865N Datasheet HTML 3Page - Analog Devices AD1865N Datasheet HTML 4Page - Analog Devices AD1865N Datasheet HTML 5Page - Analog Devices AD1865N Datasheet HTML 6Page - Analog Devices AD1865N Datasheet HTML 7Page - Analog Devices AD1865N Datasheet HTML 8Page - Analog Devices AD1865N Datasheet HTML 9Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 12 page
background image
AD1865
REV. 0
–4–
TOTAL HARMONIC DISTORTION + NOISE
Total harmonic distortion plus noise (THD+N) is defined as
the ratio of the square root of the sum of the squares of the am-
plitudes of the harmonics and noise to the value of the funda-
mental input frequency. It is usually expressed in percent.
THD+N is a measure of the magnitude and distribution of lin-
earity error, differential linearity error, quantization error and
noise. The distribution of these errors may be different, depend-
ing on the amplitude of the output signal. Therefore, to be most
useful, THD+N should be specified for both large (0 dB) and
small (–20 dB, –60 dB) signal amplitudes. THD+N measure-
ments for the AD1865 are made using the first 19 harmonics
and noise out to 30 kHz.
SIGNAL-TO-NOISE RATIO
The signal-to-noise ratio is defined as the ratio of the amplitude
of the output when a full-scale code is entered to the amplitude
of the output when a midscale code is entered. It is measured
using a standard A-Weight filter. SNR for the AD1865 is mea-
sured for noise components out to 30 kHz.
CHANNEL SEPARATION
Channel separation is defined as the ratio of the amplitude of a
full-scale signal appearing on one channel to the amplitude of
that same signal which couples onto the adjacent channel. It is
usually expressed in dB. For the AD1865 channel separation is
measured in accordance with EIAJ Standard CP-307, Section
5.5.
D-RANGE DISTORTION
D-Range distortion is equal to the value of the total harmonic
distortion + noise (THD+N) plus 60 dB when a signal level of
–60 dB below full scale is reproduced. D-Range is tested with a
1 kHz input sine wave. This is measured with a standard A-Weight
filter as specified by EIAJ Standard CP-307.
GAIN ERROR
The gain error specification indicates how closely the output of
a given channel matches the ideal output for given input data. It
is expressed in % of FSR and is measured with a full-scale out-
put signal.
INTERCHANNEL GAIN MATCHING
The gain matching specification indicates how closely the ampli-
tudes of the output signals match when producing identical in-
put data. It is expressed in % of FSR (Full-Scale Range = 6 V
for the AD1865) and is measured with full-scale output signals.
MIDSCALE ERROR
Midscale error is the deviation of the actual analog output of a
given channel from the ideal output (0 V) when the twos
complement input code representing half scale is loaded into the
input register of the DAC. It is expressed in mV and is mea-
sured with half-scale output signals.
INTERCHANNEL MIDSCALE MATCHING
The midscale matching specification indicates how closely the
amplitudes of the output signals of the two channels match
when the twos complement input code representing half scale is
loaded into the input register of both channels. It is expressed in
mV and is measured with half-scale output signals.
FUNCTIONAL DESCRIPTION
The AD1865 is a complete, monolithic, dual 18-bit audio DAC.
No external components are required for operation. As shown in
the block diagram, each chip contains two voltage references,
two output amplifiers, two 18-bit serial input registers and two
18-bit DACs.
The voltage reference section provides a reference voltage for
each DAC circuit. These voltages are produced by low-noise
bandgap circuits. Buffer amplifiers are also included. This com-
bination of elements produces reference voltages that are unaf-
fected by changes in temperature and age.
The output amplifiers use both MOS and bipolar devices and
incorporate an all NPN output stage. This design technique
produces higher slew rate and lower distortion than previous
techniques. Frequency response is also improved. When com-
bined with the appropriate on-chip feedback resistor, the output
op amps convert the output current to output voltages.
The 18-bit D/A converters use a combination of segmented de-
coder and R-2R architecture to achieve consistent linearity and
differential linearity. The resistors which form the ladder struc-
ture are fabricated with silicon chromium thin film. Laser trim-
ming of these resistors further reduces linearity errors resulting
in low output distortion.
The input registers are fabricated with CMOS logic gates.
These gates allow the achievement of fast switching speeds and
low power consumption, contributing to the low glitch and low
power dissipation of the AD1865.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
AD1865
+VS
NC
TRIM
MSB
SJ
DL
LL
DGND
AGND
VOUT
IOUT
RF
–VS
IOUT
+VL
VOUT
TRIM
MSB
LR
CLK
DR
AGND
SJ
RF
18-BIT
LATCH
18-BIT
D/A
REFERENCE
18-BIT
LATCH
18-BIT
D/A
REFERENCE
NC = NO CONNECT
AD1865 Block Diagram (DIP Package)


Nº de peça semelhante - AD1865N

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD1865N AD-AD1865N Datasheet
149Kb / 12P
   Complete Dual 18-Bit 16 x Fs Audio DAC
REV. 0
AD1865N-J AD-AD1865N-J Datasheet
149Kb / 12P
   Complete Dual 18-Bit 16 x Fs Audio DAC
REV. 0
More results

Descrição semelhante - AD1865N

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD1865 AD-AD1865 Datasheet
149Kb / 12P
   Complete Dual 18-Bit 16 x Fs Audio DAC
REV. 0
AD1864 AD-AD1864 Datasheet
302Kb / 12P
   Complete Dual 18-Bit Audio DAC
REV. A
AD1864 AD-AD1864_15 Datasheet
564Kb / 12P
   COMPLETE DUAL 18 BIT AUDIO DAC
REV. A
AD1865 AD-AD1865_15 Datasheet
693Kb / 12P
   Complete Dual 18-Bit 16FS Audio DAC
REV. 0
AD1851 AD-AD1851 Datasheet
197Kb / 12P
   16-Bit/18-Bit, 16 X Fs PCM Audio DACs
REV. A
AD1851 AD-AD1851_15 Datasheet
200Kb / 12P
   16-Bit/18-Bit, 16 FS PCM Audio DACs
REV. A
AD1851RZ-J AD-AD1851RZ-J Datasheet
200Kb / 12P
   16-Bit/18-Bit, 16 3 FS PCM Audio DACs
REV. A
AD1851RZ AD-AD1851RZ Datasheet
200Kb / 12P
   16-Bit/18-Bit, 16 3 FS PCM Audio DACs
REV. A
AD1851RZ-REEL7 AD-AD1851RZ-REEL7 Datasheet
127Kb / 12P
   16-Bit/18-Bit, 16x3 FS PCM Audio DACs
REV. A
logo
API Technologies Corp
DAC9377 APITECH-DAC9377 Datasheet
2Mb / 3P
   Complete Buffered 16-Bit DAC
More results


Html Pages

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


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