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Hersteller : Analog Devices, Inc
Verpackung/Behälter : 196-LFBGA
Produkt der Kategorien : Data Acquisition - Analog to Digital Converters (ADC)
Datasheet: AD9689BBPZ-2000 Datasheet (PDF)
RoHs Status: Pb-free Halide free
Lagerbestand: 29


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AD9689BBPZ-2000 Beschreibung

The AD9689 is a dual, 14-bit, 2.0 GSPS/2.6 GSPS analog-to-digital converter (ADC). The device has an on-chip buffer and a sample-and-hold circuit designed for low power, small size, and ease of use. This product is designed to support communications applications capable of direct sampling wide bandwidth analog signals of up to 5 GHz. The −3 dB bandwidth of the ADC input is 9 GHz. The AD9689 is optimized for wide input bandwidth, high sampling rate, excellent linearity, and low power in a small package.

The dual ADC cores feature a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. The analog input and clock signals are differential inputs. The ADC data outputs are internally connected to four digital downconverters (DDCs) through a crossbar mux. Each DDC consists of multiple cascaded signal processing stages: a 48-bit frequency translator (numerically controlled oscillator (NCO)), and decimation rates. The NCO has the option to select preset bands over the general-purpose input/output (GPIO) pins, which enables the selection of up to three bands. Operation of the AD9689 between the DDC modes is selectable via SPI-programmable profiles.

In addition to the DDC blocks, the AD9689 has several functions that simplify the automatic gain control (AGC) function in a communications receiver. The programmable threshold detector allows monitoring of the incoming signal power using the fast detect control bits in Register 0x0245 of the ADC. If the input signal level exceeds the programmable threshold, the fast detect indicator goes high. Because this threshold indicator has low latency, the user can quickly turn down the system gain to avoid an overrange condition at the ADC input. In addition to the fast detect outputs, the AD9689 also offers signal monitoring capability. The signal monitoring block provides additional information about the signal being digitized by the ADC.

The user can configure the Subclasss 1 JESD204B-based high speed serialized output in a variety of one-lane, two-lane, four-lane, and eight-lane configurations, depending on the DDC configuration and the acceptable lane rate of the receiving logic device. Multidevice synchronization is supported through the SYSREF± and SYNCINB± input pins.

The AD9689 has flexible power-down options that allow significant power savings when desired. All of these features can be programmed using a 3-wire serial port interface (SPI).

The AD9689 is available in a Pb-free, 196-ball BGA, specified over the −40°C to +85°C ambient temperature range. This product is protected by a U.S. patent.

Note that throughout this data sheet, multifunction pins, such as FD_A/GPIO_A0, are referred to either by the entire pin name or by a single function of the pin, for example, FD_A, when only that function is relevant.

Product Highlights

  • Wide, input −3 dB bandwidth of 9 GHz supports direct radio frequency (RF) sampling of signals up to about 5 GHz.
  • Four integrated, wideband decimation filters and NCO blocks supporting multiband receivers.
  • Fast NCO switching enabled through the GPIO pins.
  • SPI controls various product features and functions to meet specific system requirements.
  • Programmable fast overrange detection and signal monitoring.
  • On-chip temperature diode for system thermal management.
  • 12 mm × 12 mm, 196-ball BGA.
  • Pin, package, feature, and memory map compatible with the AD9208 14-bit, 3.0 GSPS, JESD204B dual ADC.
  • Feature

    • JESD204B (Subclass 1) coded serial digital outputs
      • Support for lane rates up to 16 Gbps per lane
    • Noise density
      • −152 dBFS/Hz at 2.56 GSPS at full-scale voltage = 1.7 V p-p
      • −154 dBFS/Hz at 2.56 GSPS at full-scale voltage = 2.0 V p-p
      • −154.2 dBFS/Hz at 2.0 GSPS at full-scale voltage = 1.7 V p-p
      • −155.3 dBFS/Hz at 2.0 GSPS at full-scale voltage = 2.0 V p-p
    • 1.55 W total power per channel at 2.56 GSPS (default settings)
    • SFDR at 2.56 GSPS encode
      • 73 dBFS at 1.8 GHz AIN at −2.0 dBFS
      • 59 dBFS at 5.53 GHz AIN at −2.0 dBFS
        • full-scale voltage = 1.1 V p-p
    • SNR at 2.56 GSPS encode
      • 59.7 dBFS at 1.8 GHz AIN at −2.0 dBFS
      • 53.0 dBFS at 5.53 GHz AIN at −2.0 dBFS
        • full-scale voltage = 1.1 V p-p
    • SFDR at 2.0 GSPS encode
      • 78 dBFS at 900 MHz AIN at −2.0 dBFS
      • 62 dBFS at 5.53 GHz AIN at −2.0 dBFS
        • full-scale voltage = 1.1 V p-p
    • SNR at 2.0 GSPS encode
      • 62.7 dBFS at 900 MHz AIN at −2.0 dBFS
      • 53.1 dBFS at 5.5 GHz AIN at −2.0 dBFS
        • full-scale voltage = 1.1 V p-p
    • 0.975 V, 1.9 V, and 2.5 V dc supply operation
    • 9 GHz analog input full power bandwidth (−3 dB)
    • Amplitude detect bits for efficient AGC implementation
    • Programmable FIR filters for analog channel loss equalization
    • 2 integrated, wideband digital processors per channel
      • 48-bit NCO
      • Programmable decimation rates
    • Phase coherent NCO switching
      • Up to 4 channels available
    • Serial port control
      • Supports 100 MHz SPI writes and 50 MHz SPI reads
      • Integer clock with divide by 2 and divide by 4 options
      • Flexible JESD204B lane configurations
    • On-chip dither


    • Diversity multiband and multimode digital receivers
    • 3G/4G, TD-SCDMA, W-CDMA, and GSM, LTE, LTE-A
    • Electronic test and measurement systems
    • Phased array radar and electronic warfare
    • DOCSIS 3.0 CMTS upstream receive paths
    • HFC digital reverse path receivers

    AD9689BBPZ-2000 Pinout
    (Bild: Pinout)

    AD9689BBPZ-2000 Block Diagram
    (Bild: Diagram)

    Technische Parameter

    • Number of Bits
    • 14
    • Sampling Rate (Per Second)
    • 2G
    • Number of Inputs
    • 2
    • Input Type
    • Differential
    • Data Interface
    • JESD204B
    • Configuration
    • S/H-ADC
    • Ratio S/H:ADC
    • 1:1
    • Number of A/D Converters
    • 2
    • Architecture
    • Pipelined
    • Reference Type
    • External, Internal
    • Voltage Supply, Analog
    • 0.95V ~ 1V, 1.85V ~ 1.95V, 2.44V ~ 2.56V
    • Voltage Supply, Digital
    • 0.95V ~ 1V, 1.85V ~ 1.95V
    • Operating Temperature
    • -40??C ~ 85??C
    • Package / Case
    • 196-LFBGA Exposed Pad
    • Supplier Device Package
    • 196-BGA-ED (12x12)
    • Mounting Type
    • Surface Mount

    AD9689BBPZ-2000 Datasheet

    AD9689BBPZ-2000 Äquivalente Teile

    Für die AD9689BBPZ-2000-Komponente können Sie diese Ersatz- und Alternativteile in Betracht ziehen.

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    AD9689BBPZ-2000 Verwandte besondere

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