Pin Descriptions and Equivalent Circuits

Pin No.

Symbol

Equivalent Circuit

Description

ANALOG I/O

12

V

IN−

Inverting analog input signal. With a 1.2V reference the

full-scale input signal level is 1.0 V

V

13

V

IN+

Non-inverting analog input signal. With a 1.2V reference the

full-scale input signal level is 1.0 V

6V

REF

Reference input. This pin should be bypassed to V

0.1 µF monolithic capacitor. V

may be driven by a 1.20V external reference if desired. Do

not load this pin.

7V

REFT

V

only. Connect a 0.1 µF capacitor from each of these pins to

V

bypassed with a 0.1 µF capacitor to V

to set the input common voltage V

4V

COM

8V

REFB

DIGITAL I/O

1

CLK

Digital clock input. The range of frequencies for this input is

20 MHz to 80 MHz. The input is sampled on the rising edge

of this input.

15

DF

DF = “1” Two’s Complement

DF = “0” Offset Binary

28

STBY

This is the standby pin. When high, this pin sets the converter

into standby mode. When this pin is low, the converter is in

active mode.

5

IRS (Input Range

Select)

IRS=“V

IRS=“V

IRS = “Floating” 1.0 V

If using both V

the peak-to-peak voltage refers to the differential voltage

(V

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