DAC5662A - 12 位 275 MSPS 双路数模转换器

DAC5662A是TI德州仪器公司的一款高速DAC(>10MSPS)产品，DAC5662A是12 位 275 MSPS 双路数模转换器，本站介绍了DAC5662A的封装应用图解、特点和优点、功能等，并给出了与DAC5662A相关的TI元器件型号供参考。

DAC5662A - 12 位 275 MSPS 双路数模转换器 - 高速DAC(>10MSPS) - 数模转换器 - 德州仪器

产品描述

The DAC5662A 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 DAC5662A 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 DAC5662A has two 12-bit parallel input ports with separate clocks and data latches. For flexibility, the DAC5662A also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

The DAC5662A has been specifically designed for a differential transformer coupled output with a 50- 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.

The DAC5662A is available in a 48-pin thin quad FlatPack (TQFP). Pin compatibility between family members provides 12-bit (DAC5662A) and 14-bit (DAC5672) resolution. Furthermore, the DAC5662A is pin compatible to the DAC2902 and AD9765 dual DACs. The device is characterized for operation over the industrial temperature range of –40°C to 85°C.

产品特性

12-Bit Dual Transmit DAC
275 MSPS Update Rate
Single Supply: 3 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)

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