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ADS6224-具有串行 LVDS 输出的四路 12 位 105MSPS ADC
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ADS6224 - 具有串行 LVDS 输出的四路 12 位 105MSPS ADC

ADS6224是TI公司的一款高速ADC(>10MSPS)产品,ADS6224是具有串行 LVDS 输出的四路 12 位 105MSPS ADC,本页介绍了ADS6224的产品说明、应用、特性等,并给出了与ADS6224相关的TI元器件型号供参考。

ADS6224 - 具有串行 LVDS 输出的四路 12 位 105MSPS ADC - 高速ADC(>10MSPS) - 模数转换器 - TI公司(Texas Instruments,德州仪器)

产品描述

ADS6225/ADS6224/ADS6223/ADS6222 (ADS622X) is a family of high performance 12-bit 125/105/80/65 MSPS dual channel A-D converters. Serial LVDS data outputs reduce the number of interface lines, resulting in a compact 48-pin QFN package (7 mm × 7 mm) that allows for high system integration density. The device includes 3.5 dB coarse gain option that can be used to improve SFDR performance with little degradation in SNR. In addition to the coarse gain, fine gain options also exist, programmable in 1 dB steps up to 6 dB.

The output interface is 2-wire, where each ADC data is serialized and output over two LVDS pairs. This makes it possible to halve the serial data rate (compared to a 1-wire interface) and restrict it to less than 1 Gbps easing receiver design. The ADS622X also includes the traditional 1-wire interface that can be used at lower sampling frequencies.

An internal phase lock loop (PLL) multiplies the incoming ADC sampling clock to derive the bit clock. The bit clock is used to serialize the ADC data from each channel. In addition to the serial data streams, the frame and bit clocks are also transmitted as LVDS outputs. The LVDS output buffers have features such as programmable LVDS currents, current doubling modes and internal termination options. These can be used to widen eye-openings and improve signal integrity, easing capture by the receiver.

The ADC channel outputs can be transmitted either as MSB or LSB first and 2s complement or straight binary.

ADS622X has internal references, but can also support an external reference mode. The device is specified over the industrial temperature range (–40°C to 85°C).

产品特性

  • Maximum Sample Rate: 125 MSPS
  • 12-Bit Resolution with No Missing Codes
  • Simultaneous Sample and Hold
  • 3.5 dB Coarse Gain and up to 6 dB Programmable Fine Gain for SFDR/SNR Trade-Off
  • Serialized LVDS Outputs with Programmable Internal Termination Option
  • Supports Sine, LVCMOS, LVPECL, LVDS Clock Inputs and Amplitude Down to 400 mVpp
  • Internal Reference with External Reference Support
  • No External Decoupling Required for References
  • 3.3-V Analog and Digital Supply
  • 48 QFN Package (7 mm × 7 mm)
  • Pin Compatible 14-Bit Family (ADS624X – SLAS542)
  • Feature Compatible Quad Channel Family (ADS644X – SLAS531 and ADS642X – SLAS532)

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