AD8328 Analog Devices, AD8328 Datasheet
AD8328
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AD8328 Summary of contents
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... The AD8328 is packaged in a low cost 20-lead LFCSP and a 20-lead QSOP. The AD8328 operates from a single 5 V supply and has an operational temperature range of −40°C to +85°C. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use ...
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... Evaluation Board Features and Operation.............................. 12 Differential Signal Source ......................................................... 13 Differential Signal from Single-Ended Source ....................... 13 Single-Ended Source.................................................................. 13 Overshoot on PC Printer Ports ................................................ 13 Installing Visual Basic Control Software................................. 13 Running AD8328 Software ....................................................... 14 Controlling Gain/Attenuation of the AD8328 ....................... 14 Transmit Enable and Sleep Mode............................................. 14 Memory Functions..................................................................... 14 Outline Dimensions ....................................................................... 17 Ordering Guide............................................................................... 18 Rev Page ...
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... SPECIFICATIONS T = 25° Ω, V (differential dBmV. The AD8328 is characterized using a 2:1 transformer Table 1. Parameter INPUT CHARACTERISTICS Specified AC Voltage Input Resistance Input Capacitance GAIN CONTROL INTERFACE Voltage Gain Range Maximum Gain Minimum Gain Output Step Size Output Step Size Temperature Coefficient OUTPUT CHARACTERISTICS Bandwidth (− ...
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... AD8328 1 TOKO 458 PT-1087 used for above specifications. Typical insertion loss of 0 MHz. 2 Guaranteed by design and characterization to ±4 sigma for T 3 Measured through a 2:1 transformer. 4 Specification is worst case over all gain codes. 5 Guaranteed by design and characterization to ±3 sigma for dBmV, QPSK modulation, 160 kSPS symbol rate. ...
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... CLOCK CYCLES DATEN GAIN TRANSFER (G1) TXEN t GS ANALOG OUTPUT SIGNAL AMPLITUDE (p-p) Figure 3. Serial Interface Timing VALID DATA BIT SDATA MSB MSB CLK Figure 4. SDATA Timing Rev Page VALID DATA-WORD G2 GAIN TRANSFER (G2) t OFF t ON MSB AD8328 ...
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... AD8328 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage V CC Input Voltage IN+ IN− DATEN, SDATA, CLK, SLEEP, TXEN Internal Power Dissipation QSOP (θ = 83.2°C/ LFCSP (θ = 30.4°C/W) JA Operating Temperature Range Storage Temperature Range Lead Temperature, Soldering 60 sec 1 Thermal resistance measured on SEMI standard 4-layer board. ...
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... A Logic 0-to-Logic 1 transition latches the data bit, and a Logic 1-to-Logic 0 transfers the data bit to the slave. This requires the input serial data-word to be valid at or before this clock transition SLEEP Low Power Sleep Mode. In the sleep mode, the AD8328’s supply current is reduced to 20 μA. A Logic 0 powers down the part (high Connect ...
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... AD8328 TYPICAL PERFORMANCE CHARACTERISTICS –55 – 60dBmV OUT V = 61dBmV OUT @ MAX GAIN @ MAX GAIN –65 – 59dBmV OUT @ MAX GAIN – FREQUENCY (MHz) Figure 7. Second-Order Harmonic Distortion vs. Frequency for Various Output Powers – 60dBmV OUT @ MAX GAIN – –40°C A – ...
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... Rev Page AD8328 = 29dBmV IN MAX GAIN MIN GAIN 10 100 FREQUENCY (MHz 10MHz f = 5MHz f = 42MHz f = 65MHz GAIN CONTROL (Decimal Code) Figure 17. Gain Error vs. Gain Control ...
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... OUTPUT BIAS, IMPEDANCE, AND TERMINATION The output stage of the AD8328 requires a bias The 5 V power supply should be connected to the center tap of the output transformer. In addition, the V tap of the transformer should be decoupled as seen in Figure 20. ...
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... The differential input and output traces should be kept as short as possible. Keeping the traces short minimizes parasitic capacitance and inductance. This is most critical between the outputs of the AD8328 and the 2:1 output transformer also critical that all differential signal paths be symmetrical in length and width. In addition, the input and output traces should be adequately spaced to minimize coupling (crosstalk) through the board ...
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... AD8328 upstream cable driver via the parallel port of a PC. A standard printer cable connected to the parallel port of the PC is used to feed all the necessary data to the AD8328 using the Windows®-based control software. This package provides a means of controlling the gain and the power mode of the AD8328 ...
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... SINGLE-ENDED SOURCE Although the AD8328 was designed to have optimal DOCSIS performance when used with a differential input signal, the AD8328 can also be used as a single-ended receiver digitally controlled amplifier. However, as with the single- ended-to-differential configuration previously noted, even- order harmonic distortion is slightly degraded. ...
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... Figure 25. Control Software Interface TRANSMIT ENABLE AND SLEEP MODE The Transmit Enable and Transmit Disable buttons select the mode of operation of the AD8328 by asserting logic levels on the asynchronous TXEN pin. The Transmit Disable button applies Logic 0 to the TXEN pin, disabling forward transmission. ...
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... IN– OUT– GND BYP 8 C12 0.1µF 13 DATEN SDATA SLEEP 10 11 CLK GND AD8328 QSOP AGND1 Figure 26. AD8328 Evaluation Board Schematic Rev Page AD8328 10µF TOKO R15 CABLE_OA 458PT-1087 0Ω R16 C13 0.1µ ...
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... AD8328 Figure 27. Primary Side Figure 28. Component Side Silkscreen Figure 29. Internal Power Plane Figure 30. Internal Ground Plane Figure 31. Secondary Side Figure 32. Secondary Side Silkscreen Rev Page ...
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... SEATING 0.004 BSC 0.008 PLANE 0.004 COMPLIANT TO JEDEC STANDARDS MO-137-AD Figure 34. 20-Lead Shrink Small Outline Package [QSOP] (RQ-20) Dimensions shown in inches Rev Page 0.60 MAX PIN 1 INDICATOR 2.25 2. 0.25 MIN 0.30 0.23 0.18 0.244 0.236 0.228 8° 0° 0.050 0.010 0.016 0.006 AD8328 ...
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... AD8328ACP –40°C to +85°C AD8328ACP-REEL –40°C to +85°C AD8328ACP-REEL7 –40°C to +85°C AD8328ACPZ 1 –40°C to +85°C 1 AD8328ACPZ-REEL –40°C to +85°C AD8328ACPZ-REEL7 1 –40°C to +85°C AD8328ACP-EVAL AD8328ARQ-EVAL Pb-free part. Package Description 20-Lead QSOP ...
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... NOTES Rev Page AD8328 ...
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... AD8328 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03158–0–10/05(A) Rev Page ...