Counter ICs feature interfaces for incremental encoders.
June 4, 2009 -
Available in single- or dual-axis versions, Series LS7766 has max count frequency of 40 MHz and count range of 32 bits to support applications where large magnitudes of data are involved. Configurable octal/hex parallel IO bus optimizes system throughput, while multiple counting modes relieve host microcontroller of control and data formatting tasks. Quadrature signals from encoder are validated with internal digital filters to eliminate errors from induced noise and encoder dither.
A Powerful Family of Multi-Mode Counter ICs with Interfaces for Incremental Encoders
Melville, NY, May 20, 2009 - LSI/CSI introduces the LS7766, a robust addition to its family of encoder interface and motion control ICs. The LS7766 supersedes its rivals in versatility and system throughput. Available in either single-axis, or dual-axis versions, it has a count range of 32-bits to support applications where large magnitudes of data are involved. Its configurable Octal/Hex parallel IO bus enhances the system throughput by a factor of two over its predecessors. Its many configurable counting modes relieve the host micro-controller of various control and data formatting tasks reducing the burden on its resources.
The LS7766 can directly interface with an incremental encoder. The quadrature signals from the encoder are validated with internal digital filters to eliminate errors from induced noise and encoder dither, providing a high level of reliability. The filtered signals are decoded for clock and direction before applying to the 32-bit counter. Alternatively, the count inputs can be configured to function in the non-quadrature mode if encoder interface is not required.
Each axis of the LS7766 consists of:
o 32-bit Counter
o 32-bit Input-Data-Register
o 32-bit Output-Data-Register
o Two 8-bit Functional Mode and IO Configuration Registers
o 8-bit Command Register
o 8-bit Status Register
The programmable IOs include:
o 16-bit bi-directional parallel bus to interface with micro-controllers
o Count inputs to process both quadrature and non-quadrature signals
o Index input for load_register and reset_register operations
o Flag outputs for event status
o Clock and Direction outputs from decoded quadrature signals
The maximum count frequency: 40MHz. Supply voltage range: 3V to 5.5V
LS7766 is available in several versions of single-axis, dual-axes, octal-bus and hex-bus packages.
LS7766SO = Single-Axis Octal Bus (24-Pin DIP, SOIC and TSSOP)
LS7766DO = Dual-Axes Octal Bus (28-Pin DIP, SOIC and TSSOP)
LS7766SH = Single-Axis Hex Bus (38-Pin TSSOP)
LS7766DH = Dual-Axes Hex Bus (48-Pin TSSOP)
Unit Prices for the different versions in 1k pieces, all packages, are as follows:
LS7766SO (single-axis, octal bus) = $4.05
LS7766DO (dual-axes, octal bus) = $4.60
LS7766SH (single-axis, hex bus) = $4.30
LS7766DH (dual-axes, hex bus) = $4.85
The complete Data Sheet for this device, as well as all of our Standard Products, can be found by visiting our Web Site, www.lsicsi.com. For more information, including price quotes and technical assistance, please contact sales@lsicsi.com.
ABOUT LSI COMPUTER SYSTEMS, INC.
LSI Computer Systems, Inc. (LSI/CSI) began operations as the world's first fabless semiconductor company in 1969. Since its inception, LSI/CSI has been a leader in the design and production of affordable full custom and standard mixed-signal, digital and analog integrated circuits. Using a broad array of process technologies, LSI/CSI has produced ICs that extend from the consumer and industrial marketplace to military and aerospace applications. The company's proven expertise and strong reputation have made LSI/CSI the IC provider of choice for leading manufacturers in a broad range of industries. Company Information: Name: LSI Computer Systems, Inc. Address: 1235 Walt Whitman Rd City: Melville State: NY ZIP: 11747 Country: USA Phone: 631-271-0400 FAX: 631-271-0405 http://www.lsicsi.com
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