DAC5672

www.ti.com

SLAS440C – NOVEMBER 2004 – REVISED DECEMBER 2010

DUAL, 14-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER

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FEATURES

•

Low Power: 330 mW

•

14-Bit Dual Transmit Digital-to-Analog

•

Power-Down Mode: 9 mW

Converter (DAC)

•

Package: 48-Pin Thin-Quad Flat Pack (TQFP)

•

275 MSPS Update Rate

APPLICATIONS

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Single Supply: 3 V to 3.6 V

•

Cellular Base Transceiver Station Transmit

•

High Spurious-Free Dynamic Range (SFDR):

Channel

84 dBc at 5 MHz

–

CDMA: W-CDMA, CDMA2000, IS-95

•

High Third-Order Two-Tone Intermodulation

–

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

(IMD3): 79 dBc at 15.1 MHz and 16.1 MHz

•

Medical/Test Instrumentation

•

WCDMA Adjacent Channel Leakage Ratio

•

Arbitrary Waveform Generators (ARB)

(ACLR): 78 dB at Baseband

•

Direct Digital Synthesis (DDS)

•

WCDMA ACLR: 73 dB at 30.72 MHz

•

Cable Modem Termination System (CMTS)

•

Independent or Single Resistor Gain Control

•

Dual or Interleaved Data

•

On-Chip 1.2-V Reference

DESCRIPTION

The DAC5672 is a monolithic, dual-channel, 14-bit, high-speed DAC with on-chip voltage reference.

Operating with update rates of up to 275 MSPS, the DAC5672 offers exceptional dynamic performance,

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 DAC5672 has two, 14-bit, parallel input ports with separate clocks and data latches. For flexibility, the

DAC5672 also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

The DAC5672 has been specifically designed for a differential transformer-coupled output with a 50-

Ω

doubly-terminated load. For a 20-mA full-scale output current, both a 4:1 impedance ratio (resulting in an output

power of 4 dBm) and 1:1 impedance ratio transformer (–2 dBm output power) are supported.

The DAC5672 is available in a 48-pin TQFP package. Pin compatibility between family members provides 12-bit

(DAC5662) and 14-bit (DAC5672) resolution. Furthermore, the DAC5672 is pin compatible to the DAC2904 and

AD9767 dual DACs. The device is characterized for operation over the industrial temperature range of -40°C to

85°C.

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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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2010, 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.