DAC5662 Datasheet, PDF (1/22 Pages) Texas Instruments – DUAL, 12-BIT 200 MSPS DIGITAL-TO-ANALOG CONVERTER

DAC5662
www.ti.com
SLAS425 – JULY 2004
DUAL, 12-BIT 200 MSPS DIGITAL-TO-ANALOG CONVERTER
FEATURES
• 12-Bit Dual Transmit DAC
• 200 MSPS Update Rate
• Single Supply: 3.0 V - 3.6 V
• High SFDR: 85 dBc at 5 MHz
• High IMD3: 78 dBc at 15.1 and 16.1 MHz
• WCDMA ACLR: 70 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: 15 mW
• Package: 48-Pin TQFP
APPLICATIONS
• Cellular Base Transceiver Station Transmit
Channel
– CDMA: W-CDMA, CDMA2000, IS-95
– TDMA: GSM, IS-136, EDGE/UWC-136
• Medical/Test Instrumentation
• Arbitrary Waveform Generators (ARB)
• Direct Digital Synthesis (DDS)
• Cable Modem Termination System (CMTS)
WRTB
WRTA CLKB CLKA
DE
MUX
DA[11:0]
Latch A
12−b DAC
IOUTA1
IOUTA2
BIASJ_A
DB[11:0]
MODE
GSET
SLEEP
Latch B
12−b DAC
IOUTB1
IOUTB2
BIASJ_B
1.2 V Reference
EXTIO
DVDD
DGND
AVDD
Figure 1.
AGND
DESCRIPTION
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 200 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.
The DAC5662 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 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.
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated