TDF8704 datasheet(2/20 Pages) PHILIPS

2 / 20 page

June 1994

Philips Semiconductors

Product speciﬁcation

8-bit high-speed analog-to-digital converter

TDF8704

FEATURES

• 8-bit resolution

• Sampling rate up to 50 MHz

• Extended temperature range (−40 to +85 °C)

• High signal-to-noise ratio over a large analog input

frequency range (7.4 effective bits at 4.43 MHz full-scale

input and at fclk = 50 MHz)

• Binary 3-state TTL outputs

• Overflow/underflow 3-state TTL output

• TTL compatible digital inputs

• Low-level AC clock input signal allowed

• Stable internal reference voltage regulator included

• Power dissipation only 380 mW (typical)

• Low analog input capacitance, no buffer amplifier

required

• No sample-and-hold circuit required.

APPLICATIONS

• General purpose high-speed analog-to-digital

conversion for extended temperature applications

• Automotive

• RF, satellite and GPS (Global Positioning System)

• Medical

• General industrial

• Digital video (VCR, TV and satellite).

GENERAL DESCRIPTION

The TDF8704T is an 8-bit high-speed analog-to-digital

converter (ADC) for general industrial applications. It

converts the analog input signal into 8-bit binary-coded

digital words at a maximum sampling rate of 50 MHz. All

digital inputs and outputs are TTL compatible, although a

low-level AC clock input signal is allowed.

QUICK REFERENCE DATA

Note

1. Full-scale sine wave (fi = 4.43 MHz; fclk = 50 MHz).

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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

−

ILE

DC integral linear error

−±0.4

±1

LSB

DLE

DC differential linearity error

−±0.2

±0.5

LSB

AILE

AC integral linearity error

note 1

−−±2

LSB

fclk(max)

maximum clock frequency

−−

MHz

Ptot

total power dissipation

−

380

535

TYPE NUMBER

PACKAGE

SAMPLING

FREQUENCY

PINS

PIN POSITION

MATERIAL

CODE

TDF8704T/2

SO24L

plastic

SOT137-1

20 MHz

TDF8704T/4

SO24L

plastic

SOT137-1

40 MHz

TDF8704T/5

SO24L

plastic

SOT137-1

50 MHz

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