3 概要
DAC38RFxxは高性能、デュアル/シングル・チャネル、14ビット、9GSPS、RFサンプリングのデジタル/アナログ・コンバータ(DAC)のファミリで、0~4.5GHzの広帯域の信号を合成できます。DAC38RFxxファミリはダイナミック・レンジが広いため、ワイヤレス基地局やレーダー用の3G/4G信号など、広範なアプリケーション用の信号を生成できます。
このデバイスには低消費電力のJESD204Bインターフェイスが搭載され、8つまでのレーンで最大12.5Gbpsのビット速度をサポートするため、チャネルごとに1.25GSPSの複素数データを入力できます。DAC38RFxxにはチャネルごとに2つのデジタル・アップ・コンバータが搭載されており、複数の補間レート・オプションを選択できます。独立した、柔軟な周波数を選択できるNCOを持つ、デジタル直交変調器が利用可能で、マルチ・バンドの動作に対応できます。オプションの低ジッタPLL/VCOにより、低い周波数の基準クロックを使用できるため、DACサンプリング・クロックの生成が簡単になります。
型番 |
出力 種類 |
チャネル数 |
DAC38RF83 |
差動 |
2 |
DAC38RF93 |
2 |
DAC38RF85 |
1 |
DAC38RF80 |
シングル・エンド |
2 |
DAC38RF90 |
2 |
DAC38RF84 |
1 |
- 利用可能なすべてのデバイス・オプションについては、デバイス比較表を参照してください。
4 改訂履歴
Changes from B Revision (April 2017) to C Revision
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「概要」を変更Go
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「製品情報」表を変更Go
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Changed From: alarm_out_pol To: alm_out_pol in ALARM pin description in the Pin Functions - DAC38RF83, DAC38RF93, DAC38RF85 tableGo
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Changed the Description of pins A3, A4, A7, A6, A9, A10, A12, E12, F11, F7, G6, H5, H7, J6, J11 in the Pin Functions - DAC38RF83, DAC38RF93, DAC38RF85 tableGo
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Changed the description of TXENABLE pin in Pin Functions - DAC38RF83, DAC38RF93, DAC38RF85 tableGo
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Changed From: alarm_out_pol To: alm_out_pol in ALARM pin description in the Pin Functions - DAC38RF80, DAC38RF90, DAC38RF84 tableGo
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Changed the Description of pins A3, A4, A7, A6, A9, A10, A12, D8, E8, F11, F7, G6, H5, H7, J6, J11 in the Pin Functions - DAC38RF80, DAC38RF90, DAC38RF84 tableGo
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Added description to TXENABLE pin in the Pin Functions - DAC38RF80, DAC38RF90, DAC38RF84 tableGo
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Changed the MAX value of VEE18N rail in Absolute Maximum Ratings From: 0.5 V To: 0.3 VGo
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Added "Supply Voltage Range" to the Recommended Operating Conditions tableGo
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Changed DNL typical value From: ±0.5 To: ±3 LSB in the Electrical Characteristics - DC Specifications Go
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Changed INL typical value From: ±1 To: ±4 LSB in the Electrical Characteristics - DC Specifications Go
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Added "Reference voltage drift" to the Electrical Characteristics - DC Specifications tableGo
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Changed the Isolation values in the TEST CONDITIONS, MIN,and MAX columns in the Electrical Characteristics - AC Specifications tableGo
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Added Isolation vs Output Frequency plot for DAC38RF83/93/95 in Figure 39Go
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Added Isolation vs Output Frequency plot for DAC38RF80/90/84 in Figure 40Go
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Changed the MPY values in Table 4Go
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Added MPY value for 16.5x to Table 4Go
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Changed x To: √ in the JESD204B Formats for DAC38RFxx talbeGo
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Changed JESD204B frame format for LMFSHd=84111 in Table 12Go
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Changed JESD204B frame format for LMFSHd=44210 in Table 14Go
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Changed JESD204B frame format for LMFSHd=24410 in Table 16Go
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Changed JESD204B frame format for LMFSHd=44210 in Table 17Go
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Changed JESD204B frame format for LMFSHd=88210 in Table 18Go
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Changed JESD204B frame format for LMFSHd=24410 in Table 19Go
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Changed JESD204B frame format for LMFSHd=48410 in Table 20Go
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Changed JESD204B frame format for LMFSHd=24310 in Table 21Go
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Changed JESD204B frame format for LMFSHd=48310 in Table 22Go
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Changed Table 33Go
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Changed register field programming values for LMFSHd=24410 and 24310 in Table 36Go
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Changed the bit positions of N_M1 register field From: 12-8 To: 4-0 in Table 37 Go
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Changed the bit positions of N_M1' N_M1’ (NPRIME_M1) register field From: 4-0 To: 12-8 in Table 37 Go
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Deleted ISFIRCD_ENA and ISFIR_AB regsiter fields. Added ISFIR_ENA register field in Inverse Sinc FilterGo
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Changed the description of DAC PLL alarm in Alarm MonitoringGo
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Changed from BIST_ENA to Reserved in Table 56 Go
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Changed from BIST_ZERO to Reserved in Table 56 Go
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Changed the description of OUTSUM_SEL field in Table 64 Go
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Changed From: "dummy data generation" To: "distortion enhancement" in Table 111 Go
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Changed the junction temp and loop filter voltage range for PLL tuning in Figure 167 Go
Changes from A Revision (February 2017) to B Revision
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Added VDDE1 rail to Supply Voltage Range in the Absolute Maximum Ratings tableGo
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Changed subtitle From: LVDS OUTPUT: SYNC1+/-, SYNC2+/- To: LVDS OUTPUT: SYNC0+/-, SYNC1+/- in the Electrical Characteristics - Digital Specifications table Go
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Added "0 dBFS" amplitude of input digital data in test conditions in the Electrical Characteristics - AC Specifications tableGo
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Changed the NSD values for -9 dBFS in Electrical Characteristics - AC Specifications tableGo
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Added the PLL/VCO Electrical Characteristics tableGo
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Changed From: VCO frequency = 5898.24 MHz To: VCO frequency = 5.9 GHz in Figure 43 and Figure 44Go
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Changed From: measured at 1 GHz To: measured at 1.8 GHz in Figure 41 and Figure 43Go
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Added JESD204B clock phase register setting to Table 36 Go
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Removed descriptions for CLKJESD_DIV register from Table 36 Go
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Added JESD204B clock phase register setting to Table 37Go
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Added information about the DAC output total current for various full scale current settings in DAC Fullscale Output Current Go
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Changed the text in the second sentence of the DAC Transfer Function for DAC38RF80/90/84 section Go
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Changed Bit 0 of Table 123 From: Enables the GSM PLL To: ReservedGo
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Changed Table 125 Go
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Changed description of SERDES_REFCLK_DIV register field in Table 126 Go
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Changed Bit 12:11, 6:5 and 4:2 of Table 129 Go
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Updated the startup sequence in Figure 167 Go
Changes from * Revision (December 2016) to A Revision
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「特長」のスペクトル性能(オンチップPLL、DIFF)を変更Go
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テキストを「チャネルごとに1.23GSPSの複素数」から「チャネルごとに1.25GSPSの複素数」に「概要」で変更Go
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Changed the Pin Configuration image Go
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Changed the Pin Functions tableGo
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Changed the Description of SYSREF+ From: "LVPECL SYSREF positive input." To: "LVPECL SYSREF positive input, self biased." in the Pin Functions - DAC38RF83, DAC38RF93, DAC38RF85 tableGo
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Changed the Pin Configuration image Go
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Changed the Pin Functions tableGo
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Added "Transformer (TCM2-452X-2+) loss not de-embedded 2.1 GHz output frequency" to the Full scale output power Test Conditions in Electrical Characteristics - DC SpecificationsGo
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Changed Reference output current From: 100 mA To: 100 nA in the Electrical Characteristics - DC SpecificationsGo
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Changed the POWER SUPPLY CURRENT AND CONSUMPTION section of the Electrical Characteristics - DC specifications tableGo
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Updated the typical values for power consumption for all modes in Electrical Characteristics - DC Specifications tableGo
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Specified the test conditions for Electrical Characteristics - DC Specifications tableGo
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Added max current and power consumption for operating Mode 1 and Mode 11 Electrical Characteristics - DC Specifications tableGo
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Changed VI(DPP) From: MIN = 100 V TYP = 800 V To: TYP = 800 mV MAX = 2000 mVin Electrical Characteristics - Digital Specifications tableGo
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Changed the typical values throughout the Electrical Characteristics - AC Specifications tableGo
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Changed the NSD Test Conditions in the Electrical Characteristics - AC Specifications tableGo
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Changed the AC PERFORMANCE – Modulated Signals section Test Conditions in the Electrical Characteristics - AC Specifications tableGo
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Changed From: LMFSHd = 841 To: LMFSHd = 84111 in the Typical Characteristics conditions statementGo
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Updated graphs in the Typical Characteristics sectionGo
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Added: Transformer loss is not de-embedded in Figure 37 Go
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Added: VCO frequency to Figure 41 through Figure 44 Go
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Changed text From: 1.25 GSPS complex per channel To: 1.23 GSPS complex per channel in the DescriptionGo
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Replaced the Functional Block Diagrams, Figure 45 through Figure 50Go
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Updated the max input rate in Table 9 Go
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Updated value of pull up and pull down resistors in Figure 70 under CMOS Digital InputsGo
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Changed From: 2 x (DACFS -11) To: 2 mA x (DACFS - 11) in Equation 10 Go
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Changed text From: "(PFD) and charge pump (CP) is required." To: "(PFD) is approximately 550 MHz." in the Internal PLL/VCO sectionGo
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Updated the startup sequence in Figure 167 Go
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Replaced Figure 172 Go