SPT7610 Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – 6-BIT, 1 GSPS FLASH A/D CONVERTER

SPT7610
6-BIT, 1 GSPS FLASH A/D CONVERTER
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
JANUARY 21, 2002
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).
BLOCK DIAGRAM
Analog
V_{RT Input}
Preamp
Comparator
64
CLKCLK
CLOCK
BUFFER
DEMUX
CLOCK
BUFFER
63
D6B
49
D6
D5B
(OVR)
D4B
V_R3
48
D3B
D5
(MSB)
D2B
D1B
33
D4
D0B
V_RM
32
D3
D6A
17
D2
D5A
D4A
V_R1
16
D3A
D1
D2A
D1A
2
DO
D0A
(LSB)
1
V_RB
TESTA-
BILITY
TEST
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)
BANK B
BANK A
MINV
LINV