AD8330 Analog Devices, AD8330 Datasheet
AD8330
Available stocks
Related parts for AD8330
AD8330 Summary of contents
Page 1
... MODE, the gain will decrease over the same range, with opposite slope. A second gain control port is provided at pin VMAG and allows the user to vary the numeric gain from a factor of 0.03 to 10. All the parameters of the AD8330 have low sensitivities to temperature and supply voltages. Using V ...
Page 2
... AD8330–SPECIFICATIONS Parameter INPUT INTERFACE Full-Scale Input Input Resistance Input Capacitance Voltage Noise Spectral Density Common-Mode Voltage Level Input Offset Drift 1 Permissible CM Range Common-Mode AC Rejection OUTPUT INTERFACE Small Signal –3dB Bandwidth Peak Slew Rate Peak-to-Peak Output Swing Common-Mode Voltage Voltage Noise Spectral Density ...
Page 3
... See Typical Performance Characteristics for more detailed information on distortion in a variety of operating conditions. 3 For minimum sized coupling capacitors. REV. A Conditions Pin ENBL Output Pins Remain at CNTR Pins VPSI, VPOS, VPSO, COMM, CMOP V = 0.75 V DBS –3– AD8330 Min Typ Max Unit 0.5 V 1.3 1.5 1.7 V 2.3 V ...
Page 4
... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8330 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
Page 5
... COMM 10 VMAG 11 CMOP 12 OPLO 13 OPHI 14 VPSO 15 CNTR 16 VPOS –5– AD8330 16-Lead QSOP OFST VPOS 1 16 ENBL CNTR 2 15 AD8330 VPSI VPSO 3 14 INHI TOP VIEW OPHI 4 13 (Not to Scale) INLO OPLO 5 12 MODE CMOP 6 11 VDBS VMAG 7 10 CMGN COMM 8 ...
Page 6
... AD8330–Typical Performance Characteristics pF 0. DBS MODE 0.25 0.50 0.75 V – V DBS TPC 1. Gain vs – V MAG TPC 2. Linear Gain Multiplication Factor vs. V 1.0 0.8 0.6 0.4 0 – – ...
Page 7
... TPC 10. Differential Input Offset Histogram 10 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 100k 1M 10M FREQUENCY – Hz 200 190 180 170 160 150 140 130 120 110 100 100k 1M 10M FREQUENCY – Hz TPC 12. Output Impedance vs. Frequency AD8330 100M 100M 300M ...
Page 8
... AD8330 1.5V DBS OFST: ENABLED .75V DBS DBS –10 50k 100k 1M FREQUENCY – Hz TPC 13. CMRR vs. Frequency 1500 f = 1MHz 1200 900 600 300 0 0 0.2 0.4 0.6 0.8 1.0 FREQUENCY – Hz TPC 14. Output Referred Noise vs. V Three Temperatures 700 f = 1MHz 600 500 ...
Page 9
... HD 3 – –60 –70 –80 10M 100M 0 –10 –20 –30 –40 –50 –60 – LOAD –9– AD8330 f = 10MHz HD3 HD2 0.3 0.6 0.9 1.2 V – V p-p OUT TPC 22. Harmonic Distortion vs 0.5 V OUT-DIFFERENTIAL MAG f = 10MHz HD2 AND HD3 150 * ...
Page 10
... AD8330 10MHz 0 –10 –20 –30 –40 –50 0 0.2 0.4 0.6 0.8 1.0 V – V DBS TPC 25. Input Voltage 1 dBV vs 10MHz 10 0 –10 –20 –30 – – V MAG TPC 26. Output Voltage 0.75V DBS p-p –10 OUT –20 –30 –40 – ...
Page 11
... TPC 33. Transient Response vs. for Various Load Capacitances REV 0.75V DBS 50 75 100 = 1.5V DBS 50 75 100 12.5ns –11– AD8330 1V 1V 400ns TPC 34. V Interface Response DBS Top Bottom: V DBS OUT 2V 1mV 400ns TPC 35. V Interface Response MAG Top: V ...
Page 12
... AD8330 2.00V OUTPUT INPUT 50mV TPC 37. Overdrive Response 0.5 V, 18.5 dB Overdrive MAG 2V 1V TPC 38. ENBL Interface Response. Top: V Bottom MHz OUT – 0.75V DBS –20 –30 V –40 –50 –60 –70 –80 –90 –100 –110 1M 10M FREQUENCY – Hz TPC 39. PSRR vs. Frequency 25ns = 1 ...
Page 13
... Figure 2. The Basic Core of the AD8330 REV. A Figure 3. Block Schematic of the AD8330 Overall Structure Figure 3 shows a block schematic of the AD8330 in which the key sections are located. More detailed discussions of its structure and features are provided later; this figure provides a general overview of its capabilities. ...
Page 14
... X-AMP™ family, provide exact, constant gain scaling over the fully specified gain range, and the deviation from the ideal response is within a small fraction of a dB. For the AD8330, the scaling of both its gain interfaces is substan- /2, within a few millivolts. S tially independent of process, supply voltage, or temperature ...
Page 15
... This is the function that might be needed, for example, in providing a variable drive to a power amplifier. It will be apparent from the foregoing that the AD8330 is both an IVGA and an OVGA in the one package. This is an unusual and possibly confusing degree of versatility for a VGA; consequently we ...
Page 16
... It is apparent that the amplitude and phase response are essentially independent of the gain over this wide range, an aspect of the AD8330’s perfor- mance potential unprecedented in any prior VGA unusual for an application to require such a wide range of gains, of course ...
Page 17
... Figure 13. Input Noise vs. Common-Mode Input DBS MAG Voltage for V Output Noise and Peak Swing The output noise of the AD8330 is the input noise multiplied by the overall gain, which includes any optional change to the voltage V applied to pin VMAG. The peak output swing is also MAG ...
Page 18
... USING THE AD8330 = kHz; HP There are very few precautions that need to be observed in apply- ing the AD8330 to a wide variety of circumstances. A selection of specific applications is presented later. Here we discuss a few general aspects of utilization all high frequency circuits, careful observation of the ground nodes associated with each function is important ...
Page 19
... Applica- tions section shows how a negative supply can optionally be used. The AD8330 is enabled by taking the ENBL pin to a logical high (or, in all cases, the supply). The “UP” gain mode is enabled either by leaving the MODE pin unconnected or taken to a logical HI ...
Page 20
... These outputs are very symmetric, so the only effect of this choice is to select the desired polarity. However, when the frequency range of interest extends to the upper limits of the AD8330, a dummy resistor of the same value should be attached to the unused output. Figure 17 illustrates the ac gain and phase response for various loads and ...
Page 21
... Thus when this pin is used to rapidly modulate the primary signal, some further experimentation with response optimization may be required. In general, the AD8330 is very tolerant of a wide range of loading conditions. Preserving Absolute Gain Although the AD8330 is not laser-trimmed, its absolute gain cali- bration, being based mainly on ratios, is very good ...
Page 22
... As was shown in Figure 6, the output of the AD8330 limits quite abruptly, and the gain drops sharply above the clipping level The output power, on the other hand, using an external resistive ...
Page 23
... V of the nominal 1.1 V; variations 20% in the AD8330’s on-chip resistors will change this voltage by only 70 mV. With the connections shown, the AD9214 is able to receive an input p-p; the peak output of the AD8330 can be reduced if desired by adding a resistor from VMAG to ground. An overrange condition is signaled state on pin OR of the AD9214. DFS/GAIN is unconnected in this example ...
Page 24
... Wide Range True RMS Voltmeter The AD8362 is an rms-responding detector providing a dynamic range from low frequencies to 2.7 GHz. This may be increased to 110 dB using an AD8330 as a preconditioner, pro- vided the noise bandwidth is limited by an interstage low-pass or band-pass filter. The VGA also provides an input port that is easier to drive than the 200 general scheme ...
Page 25
... TIME – ms Figure 25. Time Domain Response of RMS Voltmeter (Simulation) REV. A 4.8 –25– AD8330 ...
Page 26
... AD8330 0.065 0.049 0.010 0.004 COPLANARITY PIN 1 INDICATOR 12 MAX 1.00 0.90 0.80 SEATING PLANE OUTLINE DIMENSIONS 16-Lead Shrink Small Outline Package [QSOP] (RQ-16) Dimensions shown in inches 0.193 BSC 16 9 0.154 BSC 0.236 1 BSC 8 PIN 1 0.069 0.053 0.012 0.025 SEATING 0.010 BSC 0.008 PLANE 0.006 0.004 ...
Page 27
... Revision History Location 4/03—Data Sheet changed from REV REV. A. Update OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 REV. A –27– AD8330 Page ...
Page 28
–28– ...