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
FEATURES
• 1:2 Demuxed ECL Compatible Outputs
• Wide Input Bandwidth - 900 MHz
• Low Input Capacitance - 15 pF (MQUAD)
• 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 separate
output banks, each with differential data ready outputs to
ease the task of data capture. The SPT7755's wide input
bandwidth and low capacitance eliminate the need for exter-
nal track-and-hold amplifiers for most applications. A propri-
etary 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 80L surface-mount MQUAD
package over the industrial temperature range of -25 to
+85 °C. Contact the factory for availability of die and /883
versions.
BLOCK DIAGRAM
Analog
V_{RT Input}
Preamp
Comparator
256
255
152
151
128
V_RM
127
64
63
2
1
V_RB
CLK CLK
CLOCK
BUFFER
D8
(OVR)
D7
(MSB)
D6
D5
D4
D3
D2
D1
DO
(LSB)
DEMUX
CLOCK
BUFFER
D8B
D7B
•
•
D5B
•
•
D2B
D1B
D0B
D8A
D7A
•
•
•
D5A
•
•
•
D2A
D1A
D0A
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)
BANK B
BANK A
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: [phone] FAX: [phone]