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FEATURES

APPLICATIONS

DESCRIPTION

DAC5672A

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

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

• 14-Bit Dual Transmit Digital-to-Analog

Converter (DAC)

• Cellular Base Transceiver Station Transmit

• 275 MSPS Update Rate

Channel

• Single Supply: 3 V to 3.6 V

–

CDMA: W-CDMA, CDMA2000, IS-95

• High Spurious-Free Dynamic Range (SFDR):

–

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

84 dBc at 5 MHz

• Medical/Test Instrumentation

• High Third-Order Two-Tone Intermodulation

• Arbitrary Waveform Generators (ARB)

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

• Direct Digital Synthesis (DDS)

• WCDMA Adjacent Channel Leakage Ratio

• Cable Modem Termination System (CMTS)

(ACLR): 78 dB at Baseband

• WCDMA ACLR: 73 dB at 30.72 MHz

• Independent or Single Resistor Gain Control

• Dual or Interleaved Data

• On-Chip 1.2-V Reference

• Low Power: 330 mW

• Power-Down Mode: 9 mW

The DAC5672A 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 DAC5672A 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 DAC5672A has two, 14-bit, parallel input ports with separate clocks and data latches. For flexibility, the

DAC5672A also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

The DAC5672A 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 DAC5672A is available in a 48-pin TQFP package. Pin compatibility between family members provides

12-bit (DAC5662) and 14-bit (DAC5672A) resolution. Furthermore, the DAC5672A 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 © 2007–2009, 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.