AD9547 datasheet(17/106 Pages) AD

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Data Sheet

AD9547

Pin No.

Input/

Output

Pin Type

Mnemonic

Description

Differential

input

REFB

Reference B Input. This internally biased input is typically ac-coupled and,

when configured as such, can accept any differential signal with a single-ended

swing of up to 3.3 V. If dc-coupled, input can be LVPECL, CMOS, or LVDS.

Differential

input

REFBB

Complementary Reference B Input. Complementary signal to the input provided

on Pin 47. The user can configure this pin as a separate single-ended input.

No Connection. This pin should be left floating.

Logic

IRQ

Interrupt Request Line.

54, 55, 56, 57,

60, 61, 62, 63

I/O

3.3 V CMOS

M0, M1, M2, M3,

M4, M5, M6, M7

Configurable I/O Pins. These pins are configured under program control.

M0 to M2 control the serial port mode selection (see Table 30), and M3 to M7

control the EEPROM loading at startup or reset (see the Initial M0 to M7 Pin

Programming section). Note that there are no internal pull-up or pull-down

resistors on these pins, and the user should place pull-up or pull-down

resistors on each of these pins to avoid unpredictable start-up behavior.

Exposed

pad

Exposed pad

The exposed pad must be connected to ground (VSS).

Rev. G | Page 17 of 106

AD9547 Datasheet(PDF) 17 Page - Analog Devices