_______________________________________________________________________________________

5

21

1, 4, 17, 25, 26, 38, 39

Negative Analog Supply (nominally -5.2V)

ECL Clock Input Pin

2, 19, 22, 24, 27, 28, 36,

37, 40, 42

No Connect. Not internally connected.

20

6, 15

Digital Ground

Inverse ECL Clock Input Pin

7

Digital Data Output (LSB)

—

—

Overrange Output

Reference Voltage Bottom, Sense

30, 34

14

Digital Data Output (MSB)

Analog Input. Can be connected to the input

signal or used as a sense.

8–13

Digital Data Outputs

32

Reference Voltage Tap 2 (typically -1V)

—

Reference Voltage Top, Sense

41

Reference Voltage Top, Force

—

—

Data-Ready Output

Data-Ready Inverse

CLK

N.C.

CLK

DGND

D0

VRBS

D8

VIN

D7

D1–D6

VR2

VRTS

VRTF

DRINV

DREADY

6

3, 7, 12, 22, 27, 32

28, 30

5

PIN

1, 34

36

10

44

15, 19

43

37–42

17

24

23

29

35

3

D0–D6 Output Conversion Control

LINV

31

5, 16, 29, 31, 33, 35

Analog Ground

AGND

2, 8, 9, 14, 16, 18, 20,

25, 26, 33

23

Reference Voltage Bottom, Force

VRBF

11

—

Reference Voltage Tap 1 (typically -1.5V)

VR1

13

—

Reference Voltage Tap 3 (typically -0.5V)

VR3

21

______________________________________________________________Pin Description

8-Bit, 150Msps Flash ADC

FUNCTION

Ceramic SB

NAME

CERQUAD

_______________Detailed Description

The MAX1114 is a 150Msps, monolithic, 8-bit parallel

flash analog-to-digital converter (ADC) with an analog

bandwidth of over 200MHz. A major advance over pre-

vious flash converters is the inclusion of 256 input pre-

amplifiers between the reference ladder and input

comparators. (See

Functional Diagram.) This feature

not only reduces clock-transient kickback to the input

and reference ladder due to a low AC beta, but also

reduces the effect of the dynamic state of the input sig-

nal on the latching characteristics of the input compara-

tors. The preamplifiers act as buffers and stabilize the

input capacitance so it remains constant for varying

input voltages and frequencies, making the part easier

to drive than previous flash converters. The MAX1114

incorporates a special decoding scheme that reduces

metastable errors (sparkle codes or flyers) to a maxi-

mum of 1LSB.

18

D7 Output Conversion Control

MINV

4