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This version (14 May 2014 18:30) was approved by Emman.A.The Previously approved version (14 May 2014 09:32) is available.Diff

Evaluation Board for the AD8479 Precision Difference Amplifier

Features

Enables quick breadboarding/prototyping
User-defined circuit configuration
Edge-mounted SMA connector provisions
Easy connection to test equipment
RoHS compliant

General Description

The AD8479R-EBZ is specifically designed to aid in the evaluation of the AD8479, a very high common-mode voltage precision difference amplifier. The evaluation board is a bare board (that is, there are no components soldered to the board; these must be ordered separately). Figure 1 and Figure 2 show component side and circuit side of the bare evaluation board. Figure 3 shows the evaluation board schematic.

The evaluation board is fabricated in a 4-layer printed circuit board (PCB). It accepts edge-mounted Subminiature A (SMA) connectors on the inputs and outputs, which allows efficient connection to test equipment and other circuits. The evaluation board components are primarily SMT 1206 case size, with the exception of the tantalum bypass capacitors (C3, C4), which are D (C7343) size.

Figure 4 and Figure 5 show the component side and circuit side of the evaluation board assembly drawing. Figure 6 and Figure 7 show the metal layout pattern for connecting the board to the current sense amplifier and to the supporting circuitry.

Figure 1. Component side of Evaluation Board

Figure 2. Circuit Side of Evaluation Board

Evaluation Board Schematic

Figure 3. Evaluation Board Schematic

ASSEMBLY DRAWING AND BOARD LAYOUT

Figure 4. Component Side Assembly Drawing

Figure 5. Circuit Side Assembly Drawing

Figure 6. Component Side Layout

Figure 7. Circuit Side Layout

Ordering Information

Bill of Materials

Table 1. Bill of Materials

QuantityReference DesignatorPackageDescription
2 R1, R2 R1206Resistor, 49.9 Ω
4 R3, R4, R5, RL R1206User-defined resistor
4 R6, R7, R8, R9R1206Resistor, 0 Ω
1 R10 R1206 Resistor, 10 k
2 C1, C2 c1206Capacitor, 0.1uF
2 C3, C4 C7343-31Capacitor, 10uF
1 CL C1206User-defined capacitor
13 +IN,-IN,+VS,-VS,OUT, VCM,GND1-GND3, OUT1,REF+,REF-,STGND CNLOOPTP_D45 CONN-PCB pin vector
4 J1,J2,J3,J4 CN JOHNSON142-0701-801 SMA connector
1 U1 8-lead SOICAD8479ARZ