8-Bit, 750Msps Flash ADC

6

_______________________________________________________________________________________

22

Ω

0.1

µF

1N2907

-5.2V

-2V

PULL-DOWN

(ANALOG)

-5.2V

L

**

**

50

Ω

50

Ω

22

Ω

50

Ω

**

-2.0V

REFERENCE

CLOCK IN

VIN

VIN

VRTF

VRTS

VRM

VRBS

VRBF

CLK

NCLK

AGND

DGND

U1

U1

U2

R

R

NDRB (NOT DATA READY)

DRB (DATA READY)

D8B (OVR)

D7B (MSB)

D6B

D5B

D4B

D3B

D2B

D1B

D0B (LSB)

NDRA (NOT DATA READY)

DRA (DATA READY)

D8A (OVR)

D7A (MSB)

D6A

D5A

D4A

D3A

D2A

D1A

D0A (LSB)

Ferrite bead, DIGIKEY P98208BK or equivalent

50

Ω resistor

10

µF tantalum capacitor and 0.1µF chip capacitor

OP220 or equivalent with low offset/noise

1k

Ω; 0.1% matched

AGND

DGND

Motorola ECLinPS Lite, MC10EL16, differential receiver

with 250ps (typ) propagation delay

L =

* =

* * =

U1 =

R =

=

=

U2 =

-2.0V

PULL-DOWN

(DIGITAL)

MAX1151

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

Figure 1. Typical Interface Circuit