SPT7610

6-BIT, 1 GSPS FLASH A/D CONVERTER

JANUARY 21, 2002

FEATURES

• 1:2 demuxed ECL-compatible outputs

• 1.0 GSPS conversion rate

• Wide input bandwidth: 1.4 GHz

• Low input capacitance: 8 pF

• Metastable errors reduced to 1 LSB

• Monolithic construction

• Binary/Two’s complement output

APPLICATIONS

• Radar, EW, ECM

• Direct RF down-conversion

• Microwave modems

• Industrial ultrasound

• Transient capture

• Test and measurement

GENERAL DESCRIPTION

The SPT7610 is a full parallel (flash) analog-to-digital con-

verter capable of digitizing full-scale (0 to –1 V) inputs into

six-bit digital words at an update rate of 1 GSPS. The

ECL-compatible outputs are demultiplexed into two sepa-

rate output banks, each with differential data-ready out-

puts to ease the task of data capture. The SPT7610’s wide

input bandwidth and low capacitance eliminate the need

for external track-and-hold amplifiers for most applica-

tions. A proprietary decoding scheme reduces metastable

errors to the 1 LSB level. The SPT7610 operates from a

single –5.2 V supply, with a nominal power dissipation of

2.75 W.

The SPT7610 is available in a 44L hermetic cerquad

surface-mount package in the industrial temperature

range (–40 °C to +85 °C).

64

63

49

48

33

32

17

16

2

1

CLOCK

BUFFER

DO

(LSB)

D1

D2

D3

D4

D5

(MSB)

D6

(OVR)

V

RT

Analog

Input

Preamp

Comparator

V

RM

V

RB

CLKCLK

DEMUX

CLOCK

BUFFER

DRB (DATA READY)

DRB (DATA READY)

D6B (OVR)

D5B (MSB)

D4B

D3B

D2B

D1B

D0B (LSB)

DRA (DATA READY)

DRA (DATA READY)

D6A (OVR)

D5A (MSB)

D4A

D3A

D2A

D1A

D0A (LSB)

D6B

D5B

D4B

D3B

D2B

D1B

D0B

D6A

D5A

D4A

D3A

D2A

D1A

D0A

BANK B

BANK A

V

R3

MINV

LINV

TESTA-

BILITY

TEST

BLOCK DIAGRAM