THS788 Datasheet, PDF (1/43 Pages) Texas Instruments – QUAD-CHANNEL TIME MEASUREMENT UNIT (TMU)

THS788
www.ti.com
SLOS616B – MARCH 2010 – REVISED JUNE 2011
QUAD-CHANNEL TIME MEASUREMENT UNIT (TMU)
Check for Samples: THS788
FEATURES
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• Four Event Channels + Sync Channel
• Single-Shot Accuracy: 8 ps, One Sigma
• Precision: 13 ps (LSB)
• Result Interface Range: 0 s to 7 s
• Event Input Rate: 200 MHz
• Low TC: 0.1 ps/°C
• High-Speed Serial Host-Processor Bus
Interface: 50 MHz
• Programmable Serial-Result Interface Speed:
75 MHz–300 MHz
• High-Speed LVDS-Compatible Serial-Result
Bus per Channel
• Programmable Serial-Result Bus Length
• Temperature Sensor
• Single 3.3-V Supply
• Power: 675 mW/Channel, 18 Bits, 300 MHz,
Four Channels
APPLICATIONS
• Automatic Test Equipment
• Benchtop Time-Measurement Equipment
• Radar and Sonar
• Medical Imaging
• Mass Spectroscopy
• Nuclear/Particle Physics
• Laser Distance Measurement
• Ultrasonic Flow Measurement
DESCRIPTION
The THS788 is a four-channel timing measurement unit (TMU) that incorporates a time-to-digital converter (TDC)
architecture for fast and accurate measurements. The TMU is able to provide 8 ps of single-shot accuracy. The
TDC has 13 ps resolution (LSB), which is derived from an external master clock of 200 MHz. It uses fast
LVDS-compatible interfaces for all of its event inputs and serial result outputs, which allows for fast and reliable
data transfer. Each channel can process time stamps at a maximum speed of 200 MSPS.
The THS788 has a wide range of programmability that makes it flexible in different applications. The serial-result
interface has programmable data length, frequency, and data-rate mode (DDR and normal). The event channels
can be programmed to take time stamps on rising edges or falling edges. The TMU has a mode for event
management, where the user can program wait times before measurements. This programming is achieved
through a 50-MHz LVCMOS interface.
The THS788 is available in a TQFP-100 with a heat slug on top for easy heat-sink access. The device is built
using Texas Instruments RF SiGe process technology, which allows for maximum timing accuracy with low
power.
TEMPERATURE
0°C to 70°C
Table 1. PACKAGE/ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
PFD
THS788PFD
THS788PFDT
Tray, 90
Tape and reel, 250
TOP-SIDE MARKING
THS788PFD
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
(2) Package drawings, standard packaging quanities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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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.
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 © 2010–2011, Texas Instruments Incorporated