AD8264ACPZ-R7 datasheet(34/40 Pages) AD

34 / 40 page

AD8264

Rev. 0 | 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 silk-

screen layers is shown in Figure 119 to Figure 124. A description 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 parts. 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, 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 数据表(PDF) 34 Page - Analog Devices

AD8264ACPZ-R7 数据表(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

数据表下载