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DAC5662IPFBRG4 Arkusz danych(PDF) 1 Page - Texas Instruments |
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DAC5662IPFBRG4 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 22 page www.ti.com 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 SLAS425 – JULY 2004 DUAL, 12-BIT 200 MSPS DIGITAL-TO-ANALOG CONVERTER • Cellular Base Transceiver Station Transmit • 12-Bit Dual Transmit DAC Channel • 200 MSPS Update Rate – CDMA: W-CDMA, CDMA2000, IS-95 • Single Supply: 3.0 V - 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 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. Copyright © 2004, 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. |
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