SPT7755 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 8-BIT, 750 MSPS FLASH A/D CONVERTER

SPT7755
8-BIT, 750 MSPS, FLASH A/D CONVERTER
OCTOBER 2002
FEATURES
• 1:2 Demuxed ECL compatible outputs
• Wide input bandwidth – 900 MHz
• Low input capacitance – 15 pF
• Metastable errors reduced to 1 LSB
• Monolithic for low cost
• Gray code output
APPLICATIONS
• Digital oscilloscopes
• Transient capture
• Radar, EW, ECM
• Direct RF down-conversion
GENERAL DESCRIPTION
The SPT7755 is a full parallel (flash) analog-to-digital con-
verter capable of digitizing full scale (0 to –2 V) inputs into
eight-bit digital words at an update rate of 750 MSPS. 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 SPT7755’s wide
input bandwidth and low capacitance eliminate the need
for external track-and-hold amplifiers for most applications.
A proprietary decoding scheme reduces metastable errors
to the 1 LSB level. The SPT7755 operates from a single –
5.2 V supply, with a nominal power dissipation of 5.5 W.
The SPT7755 is available in an 80-lead surface-mount
MQuad package over the industrial temperature range
(–25 °C to +85 °C).
BLOCK DIAGRAM
Analog
V_RT Input
Preamp
Comparator
256
CLK CLK
CLOCK
BUFFER
DEMUX
CLOCK
BUFFER
V_RM
V_RB
255
D8
(OVR)
D8B
D7B
152
D7
D6B
(MSB)
D5B
151
D4B
D6
D3B
D2B
128
D5
D1B
D0B
127
D4
D8A
64
D3
D7A
D6A
63
D5A
D2
D4A
D3A
2
D1
D2A
D1A
1
D0
D0A
(LSB)
DRB (DATA READY)
DRB (DATA READY)
D8B (OVR)
D7B (MSB)
D6B
D5B
D4B
D3B
D2B
D1B
D0B (LSB)
DRA (DATA READY)
DRA (DATA READY)
D8A (OVR)
D7A (MSB)
D6A
D5A
D4A
D3A
D2A
D1A
D0A (LSB)