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

X  

ISL5857IAZ Folha de dados(PDF) 10 Page - Intersil Corporation

Nome de Peças ISL5857IAZ
Descrição Electrónicos  12-bit, 3.3V, 260MSPS, High Speed D/A Converter
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL5857IAZ Folha de dados(HTML) 10 Page - Intersil Corporation

Back Button ISL5857IAZ Datasheet HTML 6Page - Intersil Corporation ISL5857IAZ Datasheet HTML 7Page - Intersil Corporation ISL5857IAZ Datasheet HTML 8Page - Intersil Corporation ISL5857IAZ Datasheet HTML 9Page - Intersil Corporation ISL5857IAZ Datasheet HTML 10Page - Intersil Corporation ISL5857IAZ Datasheet HTML 11Page - Intersil Corporation ISL5857IAZ Datasheet HTML 12Page - Intersil Corporation ISL5857IAZ Datasheet HTML 13Page - Intersil Corporation ISL5857IAZ Datasheet HTML 14Page - Intersil Corporation  
Zoom Inzoom in Zoom Outzoom out
 10 / 14 page
background image
ISL5857
10
FN6079.3
October 7, 2015
Submit Document Feedback
Ground Planes
Separate digital and analog ground planes should be used. All
of the digital functions of the device and their corresponding
components should be located over the digital ground plane
and terminated to the digital ground plane. The same is true
for the analog components and the analog ground plane.
Noise Reduction
To minimize power supply noise, 0.1µF capacitors should be
placed as close as possible to the converter’s power supply
pins, AVDD and DVDD. Also, the layout should be designed
using separate digital and analog ground planes and these
capacitors should be terminated to the digital ground for DVDD
and to the analog ground for AVDD. Additional filtering of the
power supplies on the board is recommended.
Voltage Reference
The internal voltage reference of the device has a nominal value
of +1.23V with a ±40ppm/°C drift coefficient over the full
temperature range of the converter. It is recommended that a
0.1µF capacitor be placed as close as possible to the REFIO
pin, connected to the analog ground. The REFLO pin (16)
selects the reference. The internal reference can be selected if
pin 16 is tied low (ground). If an external reference is desired,
then pin 16 should be tied high (the analog supply voltage) and
the external reference driven into REFIO, pin 17. The full scale
output current of the converter is a function of the voltage
reference used and the value of RSET. IOUT should be within
the 2mA to 20mA range, though operation below 2mA is
possible with performance degradation.
If the internal reference is used, VFSADJ will equal
approximately 1.2V (pin 18). If an external reference is used,
VFSADJ will equal the external reference. The calculation for
IOUT (Full Scale) is:
IOUT(Full Scale) = (VFSADJ/RSET) x 32
If the full scale output current is set to 20mA by using the
internal voltage reference (1.2V) and a 1.91kΩ RSET resistor,
then the input coding to output current will resemble the
following:
Analog Output
IOUTA and IOUTB are complementary current outputs. The sum
of the two currents is always equal to the full scale output
current minus one LSB. If single-ended use is desired, a load
resistor can be used to convert the output current to a voltage.
It is recommended that the unused output be either grounded
or equally terminated. The voltage developed at the output
must not violate the output voltage compliance range of -1.0V
to 1.25V. ROUT (the impedance loading each current output)
should be chosen so that the desired output voltage is
produced in conjunction with the output full scale current. If a
known line impedance is to be driven, then the output load
resistor should be chosen to match this impedance. The output
voltage equation is:
VOUT = IOUT x ROUT.
The most effective method for reducing the power
consumption is to reduce the analog output current, which
dominates the supply current. The maximum recommended
output current is 20mA.
Differential Output
IOUTA and IOUTB can be used in a differential-to-single-ended
arrangement to achieve better harmonic rejection. With
RDIFF = 50Ωand RLOAD = 50Ω, the circuit in Figure 15 will
provide a 500mV signal at the output of the transformer if the
full scale output current of the DAC is set to 20mA (used for
the electrical specifications table). Values of RDIFF = 100Ωand
RLOAD = 50Ω were used for the typical performance curves.
The center tap in Figure 15 must be grounded.
In the circuit in Figure 16, the user is left with the option to
ground or float the center tap. The DC voltage that will exist at
either IOUTA or IOUTB if the center tap is floating is IOUTDC x
(RA//RB) V because RDIFF is DC shorted by the transformer. If
the center tap is grounded, the DC voltage is 0V.
Recommended values for the circuit in Figure 16 are
RA =RB = 50Ω, RDIFF = 100Ω, assuming RLOAD = 50Ω. The
performance of Figures 15 and 16 is basically the same,
however leaving the center tap of Figure 16 floating allows the
circuit to find a more balanced virtual ground, theoretically
improving the even order harmonic rejection, but likely
reducing the signal swing available due to the output voltage
compliance range limitations.
TABLE 1. INPUT CODING vs OUTPUT CURRENT WITH INTERNAL
REFERENCE AND RSET = 1.91kΩ
INPUT CODE (D11-D0)
IOUTA (mA)
IOUTB (mA)
11 11111 11111
20
0
10 00000 00000
10
10
00 00000 00000
0
20


Nº de peça semelhante - ISL5857IAZ

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Intersil Corporation
ISL5857IAZ INTERSIL-ISL5857IAZ Datasheet
637Kb / 13P
   12-bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Renesas Technology Corp
ISL5857IAZ RENESAS-ISL5857IAZ Datasheet
1,020Kb / 14P
   12-bit, 3.3V, 260MSPS, High Speed D/A Converter
More results

Descrição semelhante - ISL5857IAZ

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Intersil Corporation
ISL5857 INTERSIL-ISL5857 Datasheet
637Kb / 13P
   12-bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Renesas Technology Corp
ISL5857 RENESAS-ISL5857 Datasheet
1,020Kb / 14P
   12-bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Intersil Corporation
ISL5827 INTERSIL-ISL5827 Datasheet
666Kb / 13P
   Dual 12-bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Renesas Technology Corp
ISL5757 RENESAS-ISL5757 Datasheet
902Kb / 13P
   10-bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Intersil Corporation
ISL5957 INTERSIL-ISL5957 Datasheet
630Kb / 13P
   14-Bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Renesas Technology Corp
ISL5957 RENESAS-ISL5957 Datasheet
963Kb / 14P
   14-Bit, 3.3V, 260MSPS, High Speed D/A Converter
logo
Intersil Corporation
ISL5757 INTERSIL-ISL5757 Datasheet
625Kb / 13P
   10-bit, 3.3V, 260MSPS, High Speed D/A Converter
ISL5957IBZ INTERSIL-ISL5957IBZ Datasheet
658Kb / 14P
   14-Bit, 3.3V, 260MSPS, High Speed D/A Converter
September 29, 2015
ISL5627 INTERSIL-ISL5627 Datasheet
468Kb / 12P
   Dual 8-bit, 3.3V, 260MSPS, High Speed D/A Converter
ISL5727 INTERSIL-ISL5727 Datasheet
672Kb / 13P
   Dual 10-bit, 3.3V, 260MSPS, High Speed D/A Converter
More results


Html Pages

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


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