TDA8705AT datasheet(6/16 Pages) PHILIPS

6 / 16 page

1996 Jan 12

Philips Semiconductors

Product speciﬁcation

6-bit high-speed dual Analog-to-Digital

Converter (ADC)

TDA8705A

CHARACTERISTICS

VCCA =V8 to V7 = 4.75 to 5.25 V; VCCD =V2 to V3 = 4.75 to 5.25 V; VCCO =V21 to V22 = 4.75 to 5.25 V; AGND, OGND

and DGND shorted together; VCCA to VCCD = −0.25 to +0.25 V; VCCO to VCCD = −0.25 to +0.25 V;

VCCA to VCCO = −0.25 to +0.25 V; Tamb = 0 to +70 °C; typical values measured at VCCA =VCCD =VCCO = 5 V and

Tamb =25 °C; CL = 15 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 stages supply voltage

4.75

5.0

5.25

ICCA

analog supply current

ICCD

digital supply current

ICCO

output stages supply current

Inputs

CLOCK INPUT CLK; REFERENCED TO DGND; note 1

VIL

LOW level input voltage

−

0.8

VIH

HIGH level input voltage

2.0

−

VCCD

IIL

LOW level input current

Vclk = 0.4 V

−1

−

µA

IIH

HIGH level input current

Vclk = 2.7 V

−−

µA

input impedance

fclk = 80 MHz

−

Ω

input capacitance

fclk = 80 MHz

−

I ANALOG INPUT VOLTAGE FOR A AND B; REFERENCED TO AGND

DC parallel input resistance

−−

Ω

parallel input capacitance

fi = 20 MHz

−

1.5

−

αCT

crosstalk between VIA and VIB

fi = 20 MHz

−−

Reference voltages for the resistor ladder (A and B); see Table 1

VRB

reference voltage BOTTOM

1.9

2.0

2.1

VRT

reference voltage TOP

2.8

2.9

3.0

Vdiff

differential reference voltage VRT − VRB

0.85

0.90

0.95

Iref

reference current

−

RLAD

resistor ladder

−

450

−Ω

TCRLAD

temperature coefﬁcient of the resistor ladder

−

3280

−

ppm

VosB

offset voltage BOTTOM

note 2

−

200

−

VosT

offset voltage TOP

note 2

−

200

−

Vi(p-p)

input voltage amplitude (peak-to-peak value)

0.45

0.50

0.55

Outputs (A and B)

DIGITAL OUTPUTS D5 TO D0 (REFERENCED TO DGND)

VOL

LOW level output voltage

IO = 1 mA

−

0.4

VOH

HIGH level output voltage

IO = −1 mA

2.4

−

VCCD

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