AD8346-EVALZ Analog Devices Inc, AD8346-EVALZ Datasheet
AD8346-EVALZ
Specifications of AD8346-EVALZ
AD8346-EVALZ Summary of contents
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... Frequency synthesizers Image reject mixer GENERAL DESCRIPTION The AD8346 is a silicon RFIC I/Q modulator for use from 0.8 GHz to 2.5 GHz. Its excellent phase accuracy and amplitude balance allow high performance direct modulation to RF. The differential LO input is applied to a polyphase network phase splitter that provides accurate phase quadrature from 0 ...
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... AD8346 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Equivalent Circuits ........................................................................... 6 Typical Performance Characteristics ............................................. 7 Circuit Description......................................................................... 10 Overview...................................................................................... 10 LO Interface................................................................................. 10 V-to-I Converter......................................................................... 10 Mixers .......................................................................................... 10 Differential-to-Single-Ended Converter ................................. 10 REVISION HISTORY 6/05—Rev Rev. A Updated Format..................................................................Universal Changes to Figures 30, 31, 32........................................................ 14 Update Outline Dimensions ...
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... MHz offset from LO See Figure 35 for setup See Figure 35 for setup See Figure 35 for setup −3 dB Settle to within 0 final SSB output power Time for supply current to drop below 2 mA Rev Page AD8346 Min Typ Max Unit 0.8 2.5 GHz 1 Degree rms ...
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... AD8346 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPS1, VPS2 Input Power LOIP, LOIN (relative to 50 Ω) Min Input Voltage IBBP, IBBN, QBBP, QBBN Max Input Voltage IBBP, IBBN, QBBP, QBBN Internal Power Dissipation θJA Operating Temperature Range Storage Temperature Range ...
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... QBBN 2 15 COM1 COM4 3 14 AD8346 COM1 COM4 4 13 TOP VIEW LOIN VPS2 5 12 (Not to Scale) LOIP VOUT 6 11 VPS1 COM3 7 10 ENBL COM2 8 9 Figure 2. Pin Configuration Rev Page AD8346 Equivalent Circuit Circuit A Circuit A Circuit B Circuit B Circuit C Circuit D Circuit A Circuit A ...
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... AD8346 EQUIVALENT CIRCUITS VPS2 BUFFER 9kΩ INPUT 3kΩ ACTIVE LOADS Figure 3. Circuit A VPS1 LOIN LOIP Figure 4. Circuit B TO MIXER CORE PHASE SPLITTER CONTINUES Rev Page VPS1 75kΩ TO BIAS FOR 75kΩ STARTUP/ 30kΩ SHUTDOWN ENBL 40kΩ 780Ω ...
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... CARRIER FEEDTHROUGH (dBm/ AFTER NULLING TO <–60dBm @ 25°C) Figure 12. Histogram Showing Carrier Feedthrough Distributions at the Temperature Extremes after Nulling at Ambient 1900 MHz, LO Input Level = –10 dBm. LO AD8346 100 2200 2400 = 100 kHz. ...
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... AD8346 –7 – 5.5V P –9 – –11 P – 2.7V P –13 –14 –15 –40 –30 –20 – TEMPERATURE (°C) Figure 13. SSB P vs. Temperature 1900 MHz, I and Q inputs driven in OUT LO quadrature with differential amplitude of 2. 25°C –36 –38 –40 –42 – –46 – ...
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... MHz, I and Q inputs driven in quadrature LO with differential amplitude of 2. 2.7V P – TEMPERATURE (°C) Figure 23. Power Supply Current vs. Temperature T = –40° +25° +85°C 800 1000 1200 1400 1600 1800 2000 2200 FREQUENCY (MHz) Figure 24. Return Loss of V Output vs. F OUT V = 5.0 V. POS AD8346 2400 . LO ...
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... AD8346 CIRCUIT DESCRIPTION OVERVIEW The AD8346 can be divided into the following sections: local oscillator (LO) interface, mixer, voltage-to-current (V-to-I) converter, differential-to-single-ended (D-to-S) converter, and bias. A detailed block diagram of the part is shown in Figure 25. The LO interface generates two LO signals, with 90° of phase difference between them, to drive two mixers in quadrature. ...
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... BASIC CONNECTIONS The basic connections for operating the AD8346 are shown in Figure 27. A single power supply of between 2.7 V and 5 applied to pins VPS1 and VPS2. A pair of ESD protection diodes are connected internally between VPS1 and VPS2 so these must be tied to the same potential. Both pins should be individually decoupled using 100 pF and 0.01 μ ...
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... For instance, selecting resistor networks with a 0.1% ratio matching characteristics maintains 0.03 dB gain and offset matching performance. Using resistive division, the dc bias level at the I and Q inputs to the AD8346 is set to approximately 1.2 V. Each of the four current outputs of the DAC delivers a full-scale current of +5V DVDD ...
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... An ac-coupled interface can also be implemented, as shown in Figure 29. This is an advantage because there is almost no voltage loss due to the biasing network, allowing the AD8346 inputs to be driven by the full 2 V p-p differential signal from the AD9761 (each of the DAC’s 4 outputs delivering 1 V p-p). ...
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... AD8346 EVALUATION BOARD The schematic of the AD8346 evaluation board is shown in Figure 30. This is a 4-layer FR4 board; the two center layers are used as ground planes and the top and bottom layers are used for signal and power. Figure 31 shows the layout and Figure 32 shows the silkscreen ...
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... Figure 31. Layout of Evaluation Board Figure 32. Silkscreen of Evaluation Board Rev Page AD8346 ...
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... Two main setups were used to characterize this product. These setups are shown in Figure 33 and Figure 35. Figure 33 shows the setup used to evaluate the product as an SSB. The AD8346 motherboard had circuitry that converted the single-ended I and Q inputs from the arbitrary function generator to differ- ential inputs with a dc bias of approximately 1 ...
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... CDMA SETUP For evaluating the AD8346 with CDMA waveforms, the setup shown in Figure 35 was used. This is essentially the same setup as that used for the single sideband characterization, except that the AFG2020 was replaced with the AWG2021 for providing the I and Q input signals, and the spectrum analyzer used to monitor the output was changed to an FSEA30 Rohde & ...
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... ORDERING GUIDE Model Temperature Range AD8346ARU −40°C to +85°C AD8346ARU-REEL −40°C to +85°C AD8346ARU-REEL7 −40°C to +85°C 1 AD8346ARUZ-REEL −40°C to +85°C 1 AD8346ARUZ-REEL7 −40°C to +85°C AD8346-EVAL Pb-free part. 5.10 5.00 4. 4.50 6.40 4.40 BSC 4.30 ...
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... NOTES Rev Page AD8346 ...
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... AD8346 NOTES ©2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. C05335–0–6/05(A) Rev Page ...