DAC5672 - 数模转换器

DAC5672是TI德州仪器公司的一款高速DAC(>10MSPS)产品，DAC5672是数模转换器，本站介绍了DAC5672的封装应用图解、特点和优点、功能等，并给出了与DAC5672相关的TI元器件型号供参考。

DAC5672 - 数模转换器 - 高速DAC(>10MSPS) - 数模转换器 - 德州仪器

产品描述

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- 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.

产品特性

14-Bit Dual Transmit Digital-to-Analog Converter (DAC)
275 MSPS Update Rate
Single Supply: 3 V to 3.6 V
High Spurious-Free Dynamic Range (SFDR): 84 dBc at 5 MHz
High Third-Order Two-Tone Intermodulation (IMD3): 79 dBc at 15.1 MHz and 16.1 MHz
WCDMA Adjacent Channel Leakage Ratio (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
Package: 48-Pin Thin-Quad Flat Pack (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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