SPT7863 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – 10-BIT, 40 MSPS, 160 mW A/D CONVERTER

SPT7863
FEATURES
• Monolithic 40 MSPS converter
• 160 mW power dissipation
• On-chip track-and-hold
• Single +5 V power supply
• TTL/CMOS outputs
• 5 pF input capacitance
• Low cost
• Tri-state output buffers
• High ESD protection: 3,500 V minimum
• Selectable +3 V or +5 V logic I/O
10-BIT, 40 MSPS, 160 mW A/D CONVERTER
TECHNICAL DATA
AUGUST 21, 2001
APPLICATIONS
• All high-speed applications where low power
dissipation is required
• Video imaging
• Medical imaging
• Radar receivers
• IR imaging
• Digital communications
GENERAL DESCRIPTION
The SPT7863 is a 10-bit monolithic, low-cost, ultralow-
power analog-to-digital converter capable of minimum
word rates of 40 MSPS. The on-chip track-and-hold func-
tion assures very good dynamic performance without the
need for external components. The input drive require-
ments are minimized due to the SPT7863’s low input
capacitance of only 5 pF.
SPT7863 is pin-compatible with an entire family of 10-bit,
CMOS converters (SPT7835/40/50/55/60/61), which sim-
plifies upgrades. The SPT7863 has incorporated propri-
etary circuit design and CMOS processing technologies to
achieve its advanced performance. Inputs and outputs are
TTL/CMOS-compatible to interface with TTL/CMOS logic
systems. Output data format is straight binary.
Power dissipation is extremely low at only 160 mW typical The SPT7863 is available in 28-lead SOIC and 32-lead
at 40 MSPS with a power supply of +5.0 V. The digital out- small (7 mm square) TQFP packages over the commer-
puts are +3 V or +5 V, and are user selectable. The cial temperature range.
BLOCK DIAGRAM
A_IN
1:16
Mux
ADC Section 1
T/H
Auto-
Zero
CMP
CLK In
Enable
Data
Valid
P1
...^P2
Timing
and ^P15
Control
P16
... ^{ADC Section 2}
ADC Section 15
ADC Section 16
T/H
Auto-
Zero
CMP
11-Bit
SAR
11
DAC
...
11-Bit
SAR
11
DAC
Ref
In
Reference Ladder
V_REF
11
... 11
11
11
11-Bit
16:1
Mux/
Error
Correction
D10 Overrange
D9 (MSB)
D8
D7
D6
D5
D4
D3
D2
D1
D0 (LSB)