AD9746BCPZ Datasheet AD9747BCPZ, AD9746BCPZ, AD9745BCPZ | P1-P3

Dual 8-/10-/12-/14-/16-Bit

250 MSPS Digital-to-Analog Converters

Data Sheet

AD9741/AD9743/AD9745/AD9746/AD9747

Rev. A Document Feedback

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

righ

ts of third parties that may result from its use. Specifications subject to change without notice. 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 owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support www.analog.com

FEATURES

High dynamic range, dual DACs

Low noise and intermodulation distortion

Single carrier WCDMA ACLR = 80 dBc at 61.44 MHz IF

Innovative switching output stage permits useable outputs

beyond Nyquist frequency

LVCMOS inputs with dual-port or optional interleaved

single-port operation

Differential analog current outputs are programmable from

8.6 mA to 31.7 mA full scale

Auxiliary 10-bit current DACs with source/sink capability for

external offset nulling

Internal 1.2 V precision reference voltage source

Operates from 1.8 V and 3.3 V supplies

315 mW power dissipation

Small footprint, Pb-free, 72-pin LFCSP

APPLICATIONS

Wireless infrastructure:

WCDMA, CDMA2000, TD-SCDMA, WiMAX

Wideband communications:

LMDS/MMDS, point-to-point

Instrumentation:

RF signal generators, arbitrary waveform generators

GENERAL DESCRIPTION

The AD9741/AD9743/AD9745/AD9746/AD9747 are pin-

compatible, high dynamic range, dual digital-to-analog

converters (DACs) with 8-/10-/12-/ 14-/16-bit resolutions

and sample rates of up to 250 MSPS. The devices include

specific features for direct conversion transmit applications,

including gain and offset compensation, and they interface

seamlessly with analog quadrature modulators, such as the

ADL5370.

A proprietary, dynamic output architecture permits synthesis

of analog outputs even above Nyquist by shifting energy away

from the fundamental and into the image frequency.

Full programmability is provided through a serial peripheral

interface (SPI) port. In addition, some pin-programmable

features are offered for those applications without a controller.

PRODUCT HIGHLIGHTS

1. Low noise and intermodulation distortion (IMD) enables

high quality synthesis of wideband signals.

2. Proprietary switching output for enhanced dynamic

performance.

3. Programmable current outputs and dual auxiliary DACs

provide flexibility and system enhancements.

FUNCTIONAL BLOCK DIAGRAM

16-BIT

DAC1

16-BIT

DAC2

INTERFACE LOGIC

GAIN

DAC

GAIN

DAC

OFFSET

DAC

OFFSET

DAC

INTERNAL

REFERENCE

AND

BIAS

REFIO

FSADJ

SERIAL

PERIPHERAL

INTERFACE

SDO

SDIO

SCLK

CSB

CMOS

INTERFACE

CLKP

CLKN

PID<15:0>

P2D<15:0>

IOUT1P

IOUT1N

IOUT2P

IOUT2N

AUX1P

AUX1N

AUX2P

AUX2N

06569-001

Figure 1.

AD9741/AD9743/AD9745/AD9746/AD9747 Data Sheet

Rev. A | Page 2 of 28

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Product Highlights ........................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

DC Specifications ......................................................................... 3

AC Specifications .......................................................................... 5

Digital and Timing Specifications .............................................. 7

Absolute Maximum Ratings ............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution .................................................................................. 8

Pin Configurations and Function Descriptions ........................... 9

Typical Performance Characteristics ........................................... 14

Terminology .................................................................................... 17

Theory of Operation ...................................................................... 18

Serial Peripheral Interface ......................................................... 18

General Operation of the Serial Interface ............................... 18

Instruction Byte .......................................................................... 18

MSB/LSB Transfers .................................................................... 19

Serial Interface Port Pin Descriptions ..................................... 19

SPI Register Map ............................................................................ 20

SPI Register Descriptions .............................................................. 21

Digital Inputs and Outputs ........................................................... 22

Input Data Timing ..................................................................... 22

Dual-Port Mode Timing ........................................................... 22

Single-Port Mode Timing ......................................................... 22

SPI Port, Reset, and Pin Mode .................................................. 22

Driving the DAC Clock Input .................................................. 23

Full-Scale Current Generation ................................................. 23

DAC Transfer Function ............................................................. 24

Analog Modes of Operation ..................................................... 24

Auxiliary DACS .......................................................................... 25

Power Dissipation....................................................................... 25

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

REVISION HISTORY

1/14—Rev. 0 to Rev. A

Changes to Table 15 ........................................................................ 21

Updated Outline Dimensions ....................................................... 27

Changes to Ordering Guide .......................................................... 27

5/07—Revision 0: Initial Version

Data Sheet AD9741/AD9743/AD9745/AD9746/AD9747

Rev. A | Page 3 of 28

SPECIFICATIONS

DC SPECIFICATIONS

MIN

to T

MAX

, AVDD33 = 3.3 V, DVDD33 = 3.3 V, DVDD18 = 1.8 V, CVDD18 = 1.8 V, I

= 20 mA, full-scale digital input, maximum

sample rate, unless otherwise noted.

Table 1. AD9741, AD9743, and AD9745

Parameter

AD9741 AD9743 AD9745

Unit Min Typ Max Min Typ Max Min Typ Max

RESOLUTION

Bits

ACCURACY

Differential Nonlinearity (DNL) ±0.03 ±0.05 ±0.13 LSB

Integral Nonlinearity (INL)

±0.05

±0.10

±0.25

LSB

MAIN DAC OUTPUTS

Offset Error ±0.001 ±0.001 ±0.001 %FSR

Offset Error Temperature Coefficient

1.0

ppm/°C

Gain Error ±2.0 ±2.0 ±2.0 %FSR

Gain Error Temperature Coefficient 100 100 100 ppm/°C

Gain Matching (DAC1 to DAC2) ±1.0 ±1.0 ±1.0 %FSR

Full-Scale Output Current 8.6 31.7 8.6 31.7 8.6 31.7 mA

Output Compliance Voltage

−1.0

+1.0

−1.0

+1.0

−1.0

+1.0

Output Resistance 10 10 10 MΩ

AUXILIARY DAC OUTPUTS

Resolution

Bits

Full-Scale Output Current −2.0 +2.0 −2.0 +2.0 −2.0 +2.0 mA

Output Compliance Voltage Range—Sink Current 0.8 1.6 0.8 1.6 0.8 1.6 V

Output Compliance Voltage Range—Source Current 0 1.6 0 1.6 0 1.6 V

Output Resistance 1 1 1 MΩ

Monotonicity 10 10 10 Bits

REFERENCE INPUT/OUTPUT

Output Voltage 1.2 1.2 1.2 V

Output Voltage Temperature Coefficient 10 10 10 ppm/°C

External Input Voltage Range 1.15 1.3 1.15 1.3 1.15 1.3 V

Input or Output Resistance 5 5 5 kΩ

POWER SUPPLY VOLTAGES

AVDD33, DVDD33 3.13 3.47 3.13 3.47 3.13 3.47 V

CVDD18, DVDD18 1.70 1.90 1.70 1.90 1.70 1.90 V

POWER SUPPLY CURRENTS

AVDD33

56 60 56 60 56 60 mA

DVDD33

10 14 10 14 11 15 mA

CVDD18

18 22 18 22 18 22 mA

DVDD18

28 32 29 33 30 34 mA

POWER DISSIPATION

DAC

= 250 MSPS, f

OUT

= 20 MHz 300 345 300 345 305 350 mW

DAC Outputs Disabled 115 115 120 mW

Full Device Power-Down 3 3 3 mW

OPERATING TEMPERATURE −40 +85 −40 +85 −40 +85 °C

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P28

AD9746BCPZ

Mfr. #:

Buy AD9746BCPZ

Manufacturer:

Analog Devices Inc.

Description:

Digital to Analog Converters - DAC Dual 14-Bit 250 MSPS

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

AD9746BCPZ

AD9746BCPZ

Products related to this Datasheet