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TDA8768

12-bit high-speed Analog-to-Digital Converter (ADC)

Philips Electronics 

Philips Semiconductors

12-bit high-speed Analog-to-Digital

Converter (ADC)

Preliminary specification

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

CODE

VI(p-p)

VI(p-p)

IR

BINARY OUTPUTS

D11 TO D0

TWOS COMPLEMENT

OUTPUTS

D11 TO D0

Underflow <3.1

>4.1

0

0

3.1

4.1

1

1

−

−

1

↓

−

−

↓

2 047

3.6

3.6

1

↓

−

−

↓

4 094

−

−

1

4 095

4.1

3.1

1

Overflow

>4.1

<3.1

0

000000000000

000000000000

000000000001

↓

011111111111

↓

111111111110

111111111111

111111111111

100000000000

1 0 0 0 0 0 0 0 0 0 00

100000000001

↓

111111111111

↓

011111111110

011111111111

011111111111

Table 2 Mode selection

OTC

0

1

X(1)

CE

D0 TO D11 AND IR

0

binary; active

0

twos complement; active

1

high impedance

Note

1. X = don’t care.

Table 3 Sample-and-hold selection

SH

1

active

0

inactive; tracking mode

SAMPLE-AND-HOLD

1998 Aug 26

11

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