AD9012 datasheet(5/8 Pages) AD

5 / 8 page

REV. F

–5–

AD9012

APERTURE

DELAY

ANALOG

INPUT

ENCODE

OUTPUT

DATA

N + 1

N + 2

N – 1

N + 1

tPD

Figure 2. Timing Diagram

VREF

R/2

VREF

5.2V

256 COMPARATOR

CELLS

REFMID

ANALOG

INPUT

ENCODE

5.0V

DIGITAL

OUTPUTS

5.0V

Figure 3. Input Output Circuits

DIE LAYOUT AND MECHANICAL INFORMATION

Die Dimensions . . . . . 111 mils

× 123 mils × 15 mils (±2) mils

Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 4 mils

× 4 mils

Metallization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gold

Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None

Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –VS

Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nitride

Die Attach . . . . . . . . . . . . . . . . . . . . Gold Eutectic (Ceramic)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Epoxy (Plastic)

Bond Wire . . . . . . . . 1 mil to 1.3 mil Gold; Gold Ball Bonding

ALL RESISTORS

ALL CAPACITORS

20%

ALL SUPPLY VOLTAGES

D1 (LSB)

OVERFLOW

AIN

ENCODE

–VREF

+VREF

AD1

AD2

–2.0V

DIGITAL

GROUND

ANALOG

GROUND

0.1 F

–5.2V

+5.0V

–VS

+VS

0.1 F

100

510

D8 (MSB)

ONE JUMPER

PER BOARD

OPTION #1 (STATIC) AD1 = –2.0V; AD2 = +2.4V

OPTION #2 (DYNAMIC) SEE WAVEFORMS

AD9012

–2V

+2.4V

+0.4V

640 s

5 s

AD1

AD2

D1 (LSB)

LOAD

RESISTORS

Figure 4. Burn-In Diagram

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