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Pin Descriptions and Equivalent Circuits (Continued)

Pin Functions

Pin No. Symbol Equivalent Circuit Description

CMO

Common Mode Output voltage for V

+ and V

- when

d.c. input coupling is used. See Section 3.0.

31 V

Bandgap output voltage. This pin is capable of sourcing

or sinking up to 100 µA.

126 CalRun

Calibration Running indication. This pin is at a logic

high when calibration is running.

32 R

EXT

External Bias Resistor connection. The required value

is 3.3k-Ohms (

0.1%) to ground. See Section 1.1.

100

101

102

103

D7-

D7+

D6-

D6+

D5-

D5+

D4-

D4+

D3-

D3+

D2-

D2+

D1-

D1+

D0-

D0+

LVDS data output bits sampled second in time

sequence. These outputs should always be terminated

with a differential 100Ω resistance.

ADC081000

www.national.com 4

1 2 3 4 5 6 7 8 9 ... 28 29

ADC081000 1
Converter 1
Ordering Information 2
Pin Configuration 2
Absolute Maximum Ratings 6
Package Thermal Resistances 6
Specification Definitions 10
Transfer Characteristic 12
Timing Diagrams 12
Functional Description 22
Applications Information 23
128-Lead Exposed Pad LQFP 29
Order Number ADC081000CIYB 29
NS Package Number VNX128A 29

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