AD8321_05 AD [Analog Devices], AD8321_05 Datasheet
AD8321_05
Related parts for AD8321_05
AD8321_05 Summary of contents
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FEATURES Linear in dB Gain Response Over >53 dB Range Drives Low Distortion >11 dBm Signal into 75 � Load: –53 dBc SFDR at 42 MHz Very Low Output Noise Level Maintains Constant 75 � Output Impedance Power-Up and ...
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AD8321–SPECIFICATIONS Parameter INPUT CHARACTERISTICS Specified AC Voltage Noise Figure Input Resistance Input Capacitance GAIN CONTROL INTERFACE Gain Range Maximum Gain Minimum Gain Gain Scaling Factor OUTPUT CHARACTERISTICS Bandwidth (–3 dB) Bandwidth Roll-Off Bandwidth Peaking Output Offset Voltage Output Noise Spectral ...
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LOGIC INPUTS (TTL/CMOS Logic) Parameter Logic “1” Voltage Logic “0” Voltage = 5 V) CLK, SDATA, DATEN Logic “1” Current (V INH = 0 V) CLK, SDATA, DATEN Logic “0” Current (V INL = Logic “1” Current ...
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AD8321 ABSOLUTE MAXIMUM RATINGS* Supply Voltage +V S Pins 17 ...
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GAIN CONTROL – Decimal Figure 4. Gain Error vs. Gain Control ...
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AD8321 34 MAX GAIN P = 11dBm OUT 10pF 0pF 20pF 50pF 100 FREQUENCY – MHz Figure 13. AC Response for ...
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OPERATIONAL DESCRIPTION The AD8321 is a digitally controlled variable gain power ampli fier that is optimized for driving cable multifunc tional bipolar device on a single silicon die, it incorporates all the analog features necessary ...
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AD8321 The attenuation setting in the AD8321 is determined by the 8-bit word in the data latch. The SDATA load sequence is initiated by a falling edge on DATEN. The gain control data (SDATA) is serially loaded (MSB first) into ...
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Basic Connection Figure 25 shows the basic schematic for operating the AD8321 in single-ended inverting mode. To operate in inverting mode, connect the input signal through an ac coupling capacitor to VIN–; VIN+ should be decoupled to ground with a ...
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AD8321 Varying the Gain and SPI Programming The gain of the AD8321 can be varied over a range from approximately – +26 dB, in increments of approximately 0.7526 dB per LSB. Programming the gain of ...
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Distortion and DOCSIS Care must be taken when selecting attenuation levels specified in Table I as the output signal from the AD8321 must compen sate for the losses resulting from any added attenuation as well as the insertion losses associated ...
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AD8321 Differential Input Option 2: Install the Mini-Circuits T1-6T KK81 1:1 transformer in the T1 location of the evaluation board. Jumpers J1, J2 and J3 should be applied pointing in the direction of the transformer. Apply an open circuit in ...
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TP1 C1 0.1�F J3 VIN– R1 82.5� TP4 VCC TP6 SDATA P1–5 TP7 R6 CLK P1–6 TP8 DATEN P1–2 TP9 PD P1– C14 C15 10�F 0.1�F TP5 GND V CC C10 C6 0.1�F 10�F R8 1k� V1 P1–8 ...
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AD8321 EVALUATION BOARD FEATURES AND OPERATION Figure 29. Evaluation Board Software Installation Figure 30. Evaluation Board Control Software –14– REV. A ...
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Figure 31. Screen Display of Windows-Based Control Software REV. A –15– AD8321 ...
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AD8321 Figure 32. Evaluation Board Silkscreen (Component Side) –16– REV. A ...
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Figure 33. Evaluation Board Layout (Component Side) REV. A Figure 34. Evaluation Board Layout (Solder Side) –17– AD8321 ...
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AD8321 AD8321 Evaluation Board Rev. B SINGLE- ENDED INVERTING INPUT March 17, 1999 Qty. Description 1350 size tantalum chip capacitor 2 0 1206 size ceramic chip capacitor 14 3 1,000 ...
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Revision History Location 6/05—Data Sheet Changed from REV REV. A. Changes to ORDERING GUIDE ....................................................................................................................................................4 Updated OUTLINE DIMENSIONS.............................................................................................................................................19 REV. A OUTLINE DIMENSIONS 20-Lead Standard Small Outline Package [SOIC_W] Wide Body (R-20) Dimensions shown in millimeters and (inches) –19– ...
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–20– ...