VSP5620 Datasheet, PDF (1/41 Pages) Texas Instruments – 16-Bit, 4-Channel, CCD/CMOS Sensor Analog Front-End with LED Driver

www.ti.com
16-Bit, 4-Channel, CCD/CMOS Sensor
Analog Front-End with LED Driver
Check for Samples: VSP5620, VSP5621, VSP5622
VSP5620
VSP5621
VSP5622
SBES022 – JULY 2011
FEATURES
1
•23 Four-Channel CCD/CMOS Signal: 2-Channel,
3-Channel, and 4-Channel Selectable
• Power Supply: 3.3 V Only, Typ
(Built-in LDO, 3.3 V to 1.8 V)
• Maximum Conversion Rate:
– VSP5620: 35 MSPS
– VSP5621: 50 MSPS
– VSP5622: 70 MSPS
• 16-Bit Resolution
• CDS/SH Selectable
• Maximum Input Signal Range: 2.0 V
• Analog and Digital Hybrid Gain:
– Analog Gain: 0.5 V/V to 3.5 V/V in
3/64-V/V Steps
– Digital Gain: 1 V/V to 2 V/V in
1/256-V/V Steps
• Offset Correction DAC: ±250 mV, 8-Bit
• Standard LVDS/CMOS Selectable Output:
– LVDS:
– Data Channel: 2-Channel
– Clock Channel: 1-Channel
– 8-Bit/7-Bit Serializer Selectable
– CMOS: 4 Bits × 4
• Timing Generator
– Fast Transfer Clock: One Signal
– Slow Transfer Clock: One Signal
• LED Driver: Three Channels
– Current: 60-mA/Channel Max,
16-Steps/Channel
• Timing Adjustment Resolution: t_MCLK/48
• Input Clamp/Input Reference Level
Internal/External Selectable
• Reference DAC: 0.5 V, 1.1 V, 1.5 V, 2 V
• SPI™: Three-Wire Serial
• GPIO: Four-Port
• Power (at 4-channel, LVDS, 3.3 V, without LED
Driver):
– VSP5620: 320 mW at 35 MSPS
– VSP5621: 406 mW at 50 MSPS
– VSP5622: 523 mW at 70 MSPS
APPLICATIONS
• Copiers
• Facsimile Machines
• Scanners
DESCRIPTION
The
VSP5620/21/22
are
high-speed,
high-performance, 16-bit analog-to-digital-converters
(ADCs) that have four independent sampling circuit
channels for multi-output charge-coupled device
(CCD) and complementary metal oxide
semiconductor (CMOS) line sensors. Pixel data from
the sensor are sampled by the sample/hold (SH) or
correlated double sampler (CDS) circuit, and are then
converted to digital data by an ADC. Data output is
selectable in low-voltage differential signaling (LVDS)
or CMOS modes.
The VSP5620/21/22 include a programmable gain to
support the pixel level inflection caused by luminance
and a built-in light-emitting diode (LED) driver to
adjust the brightness. The integrated
digital-to-analog-converter (DAC) can be used to
adjust the offset level for the analog input signal.
Furthermore, the timing generator (TG) is integrated
in these devices for the control of sensor operation.
The VSP5620/21/22 use 1.65 V to 1.95 V for the core
voltage and 3.0 V to 3.6 V for I/Os. The core voltage
is supplied by a built-in low-dropout regulator (LDO).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated