TDA8768 datasheet(11/20 Pages) PHILIPS

Part #	TDA8768

Description	12-bit high-speed Analog-to-Digital Converter ADC

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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11 / 20 page

1998 Aug 26

11

Philips Semiconductors

Preliminary speciﬁcation

12-bit high-speed Analog-to-Digital

Converter (ADC)

TDA8768

Table 1

Output coding with differential inputs (typical values to AGND); VI(p-p) − VI(p-p) = 2.0 V; Vref =VCCA − 1.825 V

Table 2 Mode selection

Note

1. X = don’t care.

Table 3 Sample-and-hold selection

CODE

VI(p-p)

IR

BINARY OUTPUTS

TWOS COMPLEMENT

OUTPUTS

D11 TO D0

Underﬂow

<3.1

>4.1

0

0 0 0 0 0 0 0 0 0 0 0 0

1 0 0 0 0 0 0 0 0 0 0 0

0

3.1

4.1

1

0 0 0 0 0 0 0 0 0 0 0 0

1 0 0 0 0 0 0 0 0 0 0 0

1

−−

1

0 0 0 0 0 0 0 0 0 0 0 1

1 0 0 0 0 0 0 0 0 0 0 1

↓−

−↓

↓

2047

3.6

1

0 1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 1

↓−

−↓

↓

4094

−−

1

1 1 1 1 1 1 1 1 1 1 1 0

0 1 1 1 1 1 1 1 1 1 1 0

4095

4.1

3.1

1

1 1 1 1 1 1 1 1 1 1 1 1

0 1 1 1 1 1 1 1 1 1 1 1

Overﬂow

>4.1

<3.1

0

1 1 1 1 1 1 1 1 1 1 1 1

0 1 1 1 1 1 1 1 1 1 1 1

OTC

CE

D0 TO D11 AND IR

0

binary; active

1

0

twos complement; active

X(1)

1

high impedance

SH

SAMPLE-AND-HOLD

1

active

0

inactive; tracking mode

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