ICS1531-140 Integrated Circuit System, ICS1531-140 Datasheet

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ICS1531-140

Manufacturer Part Number
ICS1531-140
Description
Triple 8-bit 100/140/165 MSPS ADC With Line-locked Clock Generator
Manufacturer
Integrated Circuit System
Datasheet
General Description
The ICS1531-100, -140 and -165 chips are each
high-performance, cost-effective, 3-channel, 8-bit
analog-to-digital converters with an integrated
line-locked clock generator. They are part of a family
of chips for high-resolution video applications that use
analog inputs, such as LCD monitors, LCD projectors,
p l a s m a d i s p l a y s , a n d p r o j e c t i o n T V s . U s i n g
low-voltage CMOS mixed-signal technology, they are
an effective data-capture solution for VGA to UXGA.
The ICS1531 chips offer analog-to-digital data
conversion and synchronized pixel-clock generation up
to 165 Mega samples per second, (MSPS) or 165 MHz.
The Dynamic Phase Adjust (DPA) circuitry allows
end-user control over the pixel clock phase, relative to
the recovered sync signal and analog pixel data. Either
the internal pixel clock can be used as a capture clock
input to the analog-to-digital converters or an external
clock input can be used. The ICS1531 provides either
one or two 24-bit pixels per clock. An ADCSYNC output
pin provides recovered HSYNC from the pixel clock
phase-locked-loop (PLL) divider chain output, which
can be used to synchronize display enable output.
A clamp signal can be generated internally or provided
through the CLAMP pin. An adjustable-gain video
amplifier fine tunes the analog signal. The PLL uses
an internal programmable feedback divider. Two
additional, independent programmable PLLs, each
with spread-spectrum functionality, support memory
and panel clock requirements.
Block
Diagram
ICS1531PB Rev D 3/17/2000
VGA
Con-
nector
Triple 8-bit 100/140/165 MSPS ADC with Line-Locked Clock Generator
HSYNC
SDA
SCL
XTAL In
XTAL Out
PDEN
Red
Green
Blue
Integrated Circuit Systems, Inc.
ICS1531
Serial IF
XTAL Osc
PRODUCT PREVIEW documents contain information on new products in
the sampling or preproduction phase of development. Characteristic data
and other specifications are subject to change without notice.
Clamp
Clamp
Clamp
POR
PLL1
PLL
PLL
Features
Applications
3-channel 8-bit analog-to-digital conversion up to 165
MHz
Uses 3.3 VDC. Digital inputs are 5-V tolerant, which
saves design and manufacturing costs.
Direct connection to analog input data (no external
pre-amplification needed)
Video amplifier: 500-MHz analog bandwidth,
software-adjustable gain
Dynamic Phase Adjust (DPA) for
software-adjustable analog sample points
Software selectable: One pixel per clock (for 24-bit
pixels) or two pixels per clock (for a total of 48 bits)
Internal clamp circuit.
Very low jitter.
Low-voltage TTL clock outputs, synchronized with
digital pixel data outputs
Two additional PLLs with spread spectrum for
memory and panel clock
Automatic Power-On Reset (POR) detection
Industry-standard two-wire serial interface speeds:
low (100 kHz), high (400 kHz), or ultra (800 kHz)
Lock detection available in hardware and software
144-pin low-profile quad flat pack (LQFP) package
LCD displays, LCD projectors, plasma displays, and
projection TVs
Document Type:
Chip Stage:
DPA
Spread Spectrum
Spread Spectrum
ADC
ADC
ADC
Product Brief
Preliminary Product Preview
RA0-RA7
RB0-RB7
GA0-GA7
GB0-GB7
BA0-BA7
BB0-BB7
ADCRCLK
ADCSYNC
REF
MCLK
PCLK
March, 2000
LCD
ASIC

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ICS1531-140 Summary of contents

Page 1

... Either the internal pixel clock can be used as a capture clock input to the analog-to-digital converters or an external clock input can be used. The ICS1531 provides either one or two 24-bit pixels per clock. An ADCSYNC output pin provides recovered HSYNC from the pixel clock phase-locked-loop (PLL) divider chain output, which can be used to synchronize display enable output ...

Page 2

... Clamp, Video Amplifier, and Analog-to-Digital Circuits (Condition RGB Inputs) Clamp Circuits (Adjust RGB Inputs to ADC Range) To properly digitize incoming RGB analog signals, the ICS1531 must adjust the signals to the range of the ADC. This adjustment is done by clamping the signal, which both (1) establishes a bottom voltage limit and (2) offsets the signal to align the black level of the incoming signal with the bottom voltage limit ...

Page 3

... In the case of the ICS1531, when its PLL is locked it locks a pixel clock output to that of an HSYNC signal from input video. ...

Page 4

... For general-purpose outputs, the ICS1531 provides three programmable pins, PSEL3, PSEL2, PSEL1. Board Manufacture and Layout For information on how to manufacture and lay out a printed circuit board so the ICS1531 operates at peak performance, on the ICS website see the 1531LG Layout Guide. ICS1531PB Rev D 3/17/2000 ...

Page 5

... ICS1531 Product Brief - Preliminary Pin Diagram 1 VSS 2 TRESET 3 VSS VSS 6 HSYNC 7 VSSSUB 8 PSEL1 9 PSEL2 10 PSEL3 VSS(TEST) 13 VSSSUB 14 Reserved 15 ARED 16 VRTR 17 VRB AGRN 20 VRTG 21 Reserved 22 ABLUE 23 VRTB 24 VDDAADC 25 VSSAADC 26 VSSAADC 27 VDDAADC 28 CLAMP 29 VDDQADC 30 BB7 31 BB6 32 BB5 33 BB4 34 BB3 35 BB2 ...

Page 6

... I Test Reset. When the ICS1531: • Is not in Test mode, this pin has no effect. • Test mode, this pin acts as a reset that sets the ICS1531 to an initial known state. Pixel Data Pins Table 3. Pixel Data Pins Pin Name Pin Type ...

Page 7

... Industry-Standard 2-Wire Serial Bus Pins Pin Name Pin Type SBADR I Serial Bus Address: Determines the address for the ICS1531 industry-standard 2-wire serial bus. SCL I Serial Clock: The clock for the interface to the industry-standard 2-wire serial bus. 5-V tolerant. SDA I/O Serial Data: Connects to the data pin for an industry-standard 2-wire serial bus. 5-V tolerant. ...

Page 8

... Do not connect these pins. Connecting them can affect the performance and operation of the ICS1531 and future members of the ICS153X family. Reserved Reserved: For use by ICS. Reserved pins must not be connected. Connecting them can affect the performance and operation of the ICS1531and future members of the ICS153X family. ICS1531PB Rev D 3/17/2000 Pin Description Pin Description Copyright © ...

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