11602610EVAL_ADDIFFAMP_a| Application Note
Differential Driver Evaluation Board EVAL-ADDIFFAMP
FEATURES
Flexible board layout Accomodates AD8131/AD8132/AD8138/AD8139 Accomodates various circuit configurations: 4-resistor Two different feedback loops Input and output transformers Filters
GENERAL DESCRIPTION
An Analog Devices differential driver evaluation board makes it easy for designers to get quick performance results for their particular differential driver application circuits. The board layout is very flexible and allows for many circuit configurations, including traditional 4-resistor circuits, circuits with two different feedback loops, circuits with input and output transformers, filters, and many others. Most resistors and capacitors are in 1206 packages. The board accommodates the AD8131, AD8132, AD8138, and AD8139. Use the data sheets for these devices with this evaluation board data sheet. The AD8131 is a special case because it has internal feedback networks but can, nonetheless, be evaluated on the board by: Omitting the R19 and R20 feedback resistors and C3 and C4 capacitors. Using 0 resistors for Gain Resistor R17 and Gain Resistor R18. Ignoring all further references to these components.
DIFFERENTIAL DRIVER EVALUATION BOARD SCHEMATIC
J5 V+ TP5 TP6 TP7 TP8 TP9 TP10 C12 C8 TP2 C5 R23 + C1 V+ JP2 J3 T1, T3 J4 R4 R2 JP1 R3 R7 R6 R5 V+ R1 C9 V C6 R13 CW V C2 R24 7 R17 R18 TP4 3 8 2 DUT V 1 OCM 4 6 R20 C4 5 R11 PR1 TP1 C13 R12 R16 R10 JP4 R9 J2 R8 T2, T4 C3 R15 R19 JP3 J1
P1 1 2 3
R22 V
R14
+
C10
C11 TP3 V R21
02838-001
Figure 1.
Rev. A
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