1

FEATURES

APPLICATIONS

DE

MUX

DA[11:0]

DB[11:0]

MODE

GSET

Latch A

Latch B

12−b DAC

12−b DAC

IOUTA1

IOUTA2

IOUTB1

IOUTB2

1.2 V Reference

WRTB

WRTA

CLKB

CLKA

BIASJ_A

BIASJ_B

EXTIO

DVDD

DGND

AVDD

AGND

SLEEP

DESCRIPTION

DAC5662

DUAL, 12-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER

• Cellular Base Transceiver Station Transmit

2

• 12-Bit Dual Transmit DAC

Channel

• 275 MSPS Update Rate

–

CDMA: W-CDMA, CDMA2000, IS-95

• Single Supply: 3 V to 3.6 V

–

TDMA: GSM, IS-136, EDGE/UWC-136

• High SFDR: 85 dBc at 5 MHz

• Medical/Test Instrumentation

• High IMD3: 78 dBc at 15.1 and 16.1 MHz

• Arbitrary Waveform Generators (ARB)

• WCDMA ACLR: 70 dB at 30.72 MHz

• Direct Digital Synthesis (DDS)

• Independent or Single Resistor Gain Control

• Cable Modem Termination System (CMTS)

• Dual or Interleaved Data

• On-Chip 1.2-V Reference

• Low Power: 330 mW

• Power-Down Mode: 15 mW

• Package: 48-Pin TQFP

Figure 1.

The DAC5662 is a monolithic, dual-channel 12-bit high-speed digital-to-analog converter (DAC) with on-chip

voltage reference.

Operating with update rates of up to 275 MSPS, the DAC5662 offers exceptional dynamic performance and

tight-gain and offset matching, characteristics that make it suitable in either I/Q baseband or direct IF

communication applications.

Each DAC has a high-impedance differential current output, suitable for single-ended or differential analog-output

configurations. External resistors allow scaling the full-scale output current for each DAC separately or together,

typically between 2 mA and 20 mA. An accurate on-chip voltage reference is temperature compensated and

delivers a stable 1.2-V reference voltage. Optionally, an external reference may be used.

The DAC5662 has two 12-bit parallel input ports with separate clocks and data latches. For flexibility, the

DAC5662 also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.