TDA8768HSLASH4 datasheet(7/20 Pages) PHILIPS

7 / 20 page

1998 Aug 26

Philips Semiconductors

Preliminary speciﬁcation

12-bit high-speed Analog-to-Digital

Converter (ADC)

TDA8768

CHARACTERISTICS

VCCA =V2 to V44, V9 to V10, V3 to V4 and V41 to V40 = 4.75 to 5.25 V; VCCD =V37 to V38 and V15 to V17 = 4.75 to 5.25 V;

VCCO =V33 to V34 = 3.0 to 5.25 V; AGND and DGND shorted together; Tamb = 0 to 70 °C; typical values measured at

VCCA =VCCD = 5 V and VCCO = 3.3 V, Tamb =25 °C, VI(p-p) − VI(p-p) = 2.0 V and CL = 10 pF; unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

VCCA

analog supply voltage

4.75

5.0

5.25

VCCD

digital supply voltage

4.75

5.0

5.25

VCCO

output supply voltage

3.0

3.3

5.25

ICCA

analog supply current

−

ICCD

digital supply current

−

ICCO

output supply current

fCLK = 4 MHz; fi = 400 kHz

−

3.2

tbf

fCLK = 40 MHz; fi = 4.43 MHz −

tbf

Inputs

CLK AND CLK (REFERENCED TO DGND)

VIL

LOW-level input voltage

VCCD = 5 V; note 1

3.19

−

3.52

VIH

HIGH-level input voltage

VCCD = 5 V; note 1

3.83

−

4.12

IIL

LOW-level input current

VCLK or VCLK = 3.19 V

−10

−−

µA

IIH

HIGH-level input current

VCLK or VCLK = 3.83 V

−−

µA

input impedance

fCLK = 40 MHz

−−

Ω

input capacitance

fCLK = 40 MHz

−−

2pF

∆V

CLK(p-p)

differential AC input voltage

(peak-to-peak value) for

switching (VCLK − VCLK)

DC voltage level = 2.5 V

0.5

−

2.0

OTC, SH AND CE (REFERENCED TO DGND); see Tables 1 and 2

VIL

LOW-level input voltage

−

0.8

VIH

HIGH-level input voltage

2.0

−

VCCD

IIL

LOW-level input current

VIL = 0.8 V

−20

−−

µA

IIH

HIGH-level input current

VIH = 2.0 V

−−

+20

µA

VI AND VI (REFERENCED TO AGND); VREF =VCCA − 1.825 V; see Table 1

IIL

LOW-level input current

−

−µA

IIH

HIGH-level input current

−

−µA

input resistance

fi = 4.43 MHz

100

−−

Ω

input capacitance

fi = 4.43 MHz

−−

2pF

VI(CM)

common mode input voltage

VI = VI; output code 2047

VCCA = 5 V

tbf

3.6

tbf

VCCA = 4.75 V

tbf

3.35

tbf

VCCA = 5.25 V

tbf

3.85

tbf

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