AD8001ART-EBZ View Datasheet(PDF) - Analog Devices
Part Name
Description
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AD8001ART-EBZ Datasheet PDF : 16 Pages
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AD8001
Layout Considerations
The specified high speed performance of the AD8001 requires
careful attention to board layout and component selection. Proper
RF design techniques and low parasitic component selection
are mandatory.
The PCB should have a ground plane covering all unused portions
of the component side of the board to provide a low impedance
ground path. The ground plane should be removed from the area
near the input pins to reduce stray capacitance.
Chip capacitors should be used for supply bypassing (see Figure 13).
One end should be connected to the ground plane and the other
within 1/8 inch of each power pin. An additional large
(4.7 µF–10 µF) tantalum electrolytic capacitor should be con-
nected in parallel, but not necessarily so close, to supply current
for fast, large-signal changes at the output.
The feedback resistor should be located close to the inverting
input pin in order to keep the stray capacitance at this node to a
minimum. Capacitance variations of less than 1 pF at the invert-
ing input will significantly affect high speed performance.
Stripline design techniques should be used for long signal traces
(greater than about 1 inch). These should be designed with a
characteristic impedance of 50 Ω or 75 Ω and be properly termi-
nated at each end.
RF
+VS
RG
IN
RT
RS
–VS
+VS
RO
OUT
–VS
C1
0.1F
C2
0.1F
C3
10F
C4
10F
RF
+VS
RG
IN
RT
–VS
RO
OUT
Inverting Configuration
Supply Bypassing
Noninverting Configuration
Figure 13. Inverting and Noninverting Configurations for Evaluation Boards
Table I. Recommended Component Values
Component
–1
RF (Ω)
649
RG (Ω)
649
RO (Nominal) (Ω) 49.9
RS (Ω)
0
RT (Nominal) (Ω) 54.9
Small Signal
340
BW (MHz)
0.1 dB Flatness 105
(MHz)
AD8001AN (PDIP)
Gain
+1 +2 +10
1050 750 470
750 51
49.9 49.9 49.9
49.9 49.9 49.9
880 460 260
70 105
+100
1000
10
49.9
49.9
20
AD8001AR (SOIC)
Gain
–1 +1 +2 +10 +100
604 953 681 470 1000
604
681 51 10
49.9 49.9 49.9 49.9 49.9
0
54.9 49.9 49.9 49.9 49.9
370 710 440 260 20
130 100 120
AD8001ART (SOT-23-5)
Gain
–1 +1 +2 +10 +100
845 1000 768 470 1000
845
768 51 10
49.9 49.9 49.9 49.9 49.9
0
54.9 49.9 49.9 49.9 49.9
240 795 380 260 20
110 300 145
–14–
REV. D
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