SPT175 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 8-BIT, 20 MSPS CMOS A/D CONVERTER

SPT1175
8-BIT, 20 MSPS CMOS A/D CONVERTER
FEATURES
• 20 MSPS Maximum Conversion Rate
• Internal Sample-and-Hold Function
• 90 mW Power Dissipation
• Internal Voltage Reference
• Single +5.0 V Power Supply
• Three-State TTL-Outputs
• CMOS Compatible Clock
APPLICATIONS
• Video Digitizing
• Image Scanners
• Personal Computer Video
• Medical Ultrasound
• Multimedia
• Digital Television
GENERAL DESCRIPTION
The SPT1175 is a CMOS two-step A/D converter capable of
digitizing full scale analog input signals into 8-bit digital words
at a sample rate of 20 MSPS.
For most applications, no external sample-and-hold or
video driving amplifiers are required due to the device's
narrow aperture time, wide bandwidth, and low input ca-
pacitance.
The SPT1175 operates from a single +5.0 V power supply
and has an internal voltage reference which eliminates the
need for external reference circuitry. All digital inputs are
CMOS compatible and the tri-state outputs are TTL-compat-
ible. The SPT1175 is ideal for most video and image pro-
cessing applications that require low power dissipation and
low cost. The SPT1175 is available in 24-lead plastic SOIC,
plastic DIP, and PLCC packages over the commercial tem-
perature range (0 to +70 °C). It is also available in die form.
BLOCK DIAGRAM
V_RB
V_RBS
Coarse
Sampling
Amplifier
Latch
Reference Matrix
VIN
Fine
Sampling
Amplifier
Fine
Sampling
Amplifier
Analog
Mux
Latch
DV_DD
DGND
Encoder
Error
Correction
Circuit
Encoder
Data
Latches
and
3-State
Output
Buffer
OE
DØ (LSB)
D1
D2
D3
D4
D5
D6
D7 (MSB)
Timing
CLK
Generator
V_RT
V_RTS
AGND AV_D
DV_DD AGND
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: [phone] FAX: [phone]