|
|
PDF AD9731 Data sheet ( Hoja de datos )
| Número de pieza | AD9731 | |
| Descripción | 10-Bit / 170 MSPS D/A Converter | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD9731 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
a
FEATURES
170 MSPS Update Rate
TTL/High Speed CMOS-Compatible Inputs
Wideband SFDR: 66 dB @ 2 MHz/50 dB @ 65 MHz
Pin-Compatible, Lower Cost Replacement for
Industry Standard AD9721 DAC
Low Power: 439 mW @ 170 MSPS
Fast Settling: 3.8 ns to 1/2 LSB
Internal Reference
Two Package Styles: 28-Lead SOIC and SSOP
APPLICATIONS
Digital Communications
Direct Digital Synthesis
Waveform Reconstruction
High Speed Imaging
5 MHz to 65 MHz HFC Upstream Path
10-Bit, 170 MSPS
D/A Converter
AD9731
FUNCTIONAL BLOCK DIAGRAM
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
CLOCK
TTL
DRIVE
LOGIC
DECODERS
AND
DRIVERS
INTERNAL VOLTAGE
REFERENCE
REGISTER
SWITCH
NETWORK
CONTROL
AMP
ANALOG
RETURN
IOUT
IOUT
REF IN
AMP OUT
RSET
REF OUT
DIGITAL DIGITAL ANALOG
CONTROL
AMP IN
–VS
+VS
–VS
GENERAL DESCRIPTION
The AD9731 is a 10-bit, 170 MSPS, bipolar D/A converter that is
optimized to provide high dynamic performance, yet offer lower
power dissipation and more economical pricing than afforded by
previous bipolar high performance DAC solutions. The AD9731
was designed primarily for demanding communications systems
applications where wideband spurious-free dynamic range (SFDR)
requirements are strenuous and could previously only be met by
using a high performance DAC such as the industry-standard
AD9721. The proliferation of digital communications into base
station and high volume subscriber-end markets has created a
demand for excellent DAC performance delivered at reduced
levels of power dissipation and cost. The AD9731 is the answer
to that demand.
Optimized for direct digital synthesis (DDS) waveform recon-
struction, the AD9731 provides 50 dB of wideband harmonic
suppression over a dc-to-65 MHz analog output bandwidth.
This signal bandwidth addresses the transmit spectrum in many
of the emerging digital communications applications where
signal purity is critical. Narrowband, the AD9731 provides an
SFDR of greater than 79 dB. This excellent wideband and
narrowband ac performance, coupled with a lower pricing structure,
make the AD9731 the optimum high performance DAC value.
The AD9731 is packaged in 28-lead SOIC (same footprint
as the industry-standard AD9721) and super space-saving
28-lead SSOP; both are specified to operate over the extended
industrial temperature range of –40∞C to +85∞C.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
1 page  
AD9731
PIN FUNCTION DESCRIPTIONS
Pin No.
1
2–9
10
11
12, 13
14
15, 18, 28
16
17
19
20
21
22
23
24
25
26
27
Mnemonic
D9(MSB)
D8–D1
D0(LSB)
CLOCK
NC
DIGITAL +VS
GND
DIGITAL –VS
RSET
ANALOG RETURN
IOUT
IOUTB
ANALOG –VS
REF IN
CONTROL AMP OUT
REF OUT
CONTROL AMP IN
DIGITAL –VS
Function
Most significant data bit of digital input word
Eight bits of 10-bit digital input word
Least significant data bit of digital input word
TTL-compatible edge-triggered latch enable signal for on-board registers
No internal connection to this pin
5 V supply voltage for digital circuitry
Converter ground
–5.2 V supply voltage for digital circuitry
Connection for external reference set resistor; nominal 1.96 kW. Full-scale output
current = 32 (control amp in V/RSET).
Analog return. This point and the reference side of the DAC load resistors should be
connected to the same potential (nominally ground).
Analog current output; full-scale current occurs with a digital word input of all “1s.” With
external load resistor, output voltage = IOUT (RLOADʈRINTERNAL). RINTERNAL is
nominally 240 W.
Complementary analog current output; full-scale current occurs with a digital word input
of all “0s.”
Negative analog supply, nominally –5.2 V
Normally connected to CONTROL AMP OUT (Pin 24). Direct line to DAC current
source network. Voltage changes (noise) at this point have a direct effect on the full-scale
output current of the DAC. Full-scale current output = 32 (CONTROL AMP IN/RSET)
when using the internal amplifier. DAC load is virtual ground.
Normally connected to REF IN (Pin 23). Output of internal control amplifier that provides
a reference for the current switch network.
Normally connected to CONTROL AMP IN (Pin 26). Internal voltage reference,
nominally –1.25 V.
Normally connected to REF Out (Pin 25) if not connected to external reference.
Negative digital supply, nominally –5.2 V.
PIN CONFIGURATION
D9(MSB) 1
28 GND
D8 2
D7 3
27 DIGITAL –VS
26 CONTROL AMP IN
D6 4
25 REF OUT
D5 5
24 CONTROL AMP OUT
D4 6 AD9731 23 REF IN
D3 7 TOP VIEW 22 ANALOG –VS
D2 8 (Not to Scale) 21 IOUTB
D1 9
20 IOUT
D0(LSB) 10
19 ANALOG RETURN
CLOCK 11
18 GND
NC 12
NC 13
DIGITAL +VS 14
17 RSET
16 DIGITAL –VS
15 GND
NC = NO CONNECT
REV. B
–5–
5 Page 
AD9731
REV. B
Figure 6. PCB Evaluation Board Schematic
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD9731.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD9731 | 10-Bit / 170 MSPS D/A Converter | Analog Devices |
| AD9732 | 10-Bit/ 200 MSPS D/A Converter | Analog Devices |
| AD9734 | 1200 MSPS DACS | Analog Devices |
| AD9735 | 1200 MSPS DACS | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |