SPT7937 Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – 12-BIT, 28 MSPS, 170 mW A/D CONVERTER

SPT7937
12-BIT, 28 MSPS, 170 mW A/D CONVERTER
FEATURES
• Monolithic 28 MSPS Analog-to-Digital Converter
• 170 mW Power Dissipation
• On-Chip Track-and-Hold
• Single +5 V Power Supply
• TTL/CMOS Outputs
• 5 pF Input Capacitance
• Selectable +3 V or +5 V Logic I/O
APPLICATIONS
• All High-Speed Applications Where
Low Power Dissipation Is Required
• Video Imaging
• Medical Imaging
• IR Imaging
• Digital Communications
GENERAL DESCRIPTION
The SPT7937 is a 12-bit monolithic, low-cost, low-power
analog-to-digital converter capable of minimum sample
rates of 28 MSPS. The SPT7937 has incorporated propri-
etary parallel SAR circuit design and CMOS processing
technologies to achieve its advanced performance.The on-
chip track-and-hold function assures very good dynamic
performance without the need for external components.
Power dissipation is extremely low at only 170 mW typical at
28 MSPS with a power supply of +5.0 V. The digital outputs
are +3 V or +5 V, and are user selectable. Inputs and out-
puts are TTL/CMOS compatible to interface with TTL/
CMOS logic systems. Output data format is straight binary.
The SPT7937 is available in a 28-lead SSOP package over
the industrial temperature range.
BLOCK DIAGRAM
1:18
A_IN
Mux
CLK In
P1
P2
Timing ^...
and ^P17
Control
P18
ADC Section 1
T/H
Auto-
Zero
CMP
ADC Sec_...tion 2
ADC Section 17
ADC Section 18
T/H
Auto-
Zero
CMP
13-Bit
SAR
13
DAC
13-Bit
SAR
13
DAC
Reference Ladder
V_RHF
V_RHS
V_RLS
V_RLF
D12 Out of Range
13
D11 (MSB)
D10
D9
13
D8
...
...
13-Bit
D7
13
18:1
Mux/
D6
Error
Correction
13
D5
D4
D3
D2
D1
DØ (LSB)
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: [phone] FAX: [phone] Website: http://www.spt.com E-Mail: [e-mail]