AD8264ACPZ-R7 datasheet(34/40 Pages) AD

34 / 40 page

AD8264

Data Sheet

Rev. B | Page 34 of 40

EVALUATION BOARD

Analog Devices, Inc. provides evaluation boards to customers as

a support service so that the circuit designer can become familiar

with the device in the most efficient way possible. The AD8264

evaluation board provides a fast, easy, and convenient means to

assess the performance of the AD8264 before going through the

hassle and expense of design and layout of a custom board. The

board is shipped fully assembled and tested, and it provides

basic functionality as shipped. Standard connectors enable the

user to attach standard lab test equipment without having to wait

for the rest of the design to be completed. Figure 117 shows a

digital image of the top view, and Figure 118 shows the schematic

diagram of the AD8264 evaluation board.

The printed circuit board (PCB) artwork for all conductor and

silkscreen layers is shown in Figure 119 to Figure 124. A descrip-

tion of a typical test setup can be found in the Applications

Information section. The PCB artwork can be used as a guide

for circuit layout and placement of devices. This is particularly

useful for multiple function circuits with many pins, requiring

multiple passive components.

CONNECTING AND USING THE AD8264-EVALZ

The AD8264 operates with bipolar power supplies from ±2.5 V dc

to ±5 V dc. Make sure the current capacity is ≥400 mA. Connect a

ground reference from the supplies to any of the black test loops,

the positive supply to the red test loop (+V), and the negative

supply to the blue test loop (−V).

Notice that the board is shipped with jumpers installed on the

2-pin headers marked GN1_2, GN3_4, OFS_12, OFS_34, GNLO,

and VOCM. If these jumpers are missing, the offset and common-

mode functions float high, substantially increasing the quiescent

current of the board.

Apply input signals to any of the preamps at the SMA connectors,

IN1 through IN4. These connectors are terminated with 50 Ω to

accommodate typical signal generator analyzer voltage source

impedances. The gain of the AD8264 preamps is fixed at 6 dB (2×)

and can be monitored at the SMA connectors, OP1_2 and OP3_4,

if desired. Note that there are output selector switches for each pair

of preamps and 453 Ω resistors in series with the preamp outputs.

Figure 117. Digital Image of the AD8264-EVALZ (Top View)

AD8264ACPZ-R7 データシート(PDF) 34 Page - Analog Devices

AD8264ACPZ-R7 データシート(HTML) 34 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

データシートダウンロード