THS789 Datasheet, PDF (1/34 Pages) Texas Instruments – THS789 Quad-Channel Time Measurement Unit (TMU)

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THS789
SLOS776A – SEPTEMBER 2012 – REVISED DECEMBER 2015
THS789 Quad-Channel Time Measurement Unit (TMU)
1 Features
•1 Four Event Channels + Sync Channel
• Single-Shot Accuracy: 800 ps
• Precision: 100 ps
• Result Interface Range: –7 to 7 s
• Event Input Rate: 200 MHz
• High-Speed Serial Host-Processor Bus Interface:
50 MHz
• High-Speed LVDS-Compatible Serial-Result Bus
per Channel
• Temperature Sensor
• Single 3.3-V Supply
2 Applications
• Automatic Test Equipment
• Benchtop Time-Measurement Equipment
• Radar and Sonar
• Medical Imaging
• Mass Spectroscopy
• Nuclear and Particle Physics
• Laser Distance Measurement
• Ultrasonic Flow Measurement
3 Description
The THS789 device is a version of the THS788 with
a reduced number of features.
The THS789 is a four-channel timing measurement
unit (TMU) that incorporates a time-to-digital
converter (TDC) architecture for fast and accurate
measurements. The TMU can provide less than
800 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 timestamps
at a maximum speed of 200 MSPS.
The THS789 has a 40-bit serial-result interface that is
operated at 300 MHz using single data rate clocking.
The event channels can be programmed to take
timestamps on rising edges or falling edges. Host
programming is achieved through a 50-MHz
LVCMOS interface.
The THS789 is available in a HTQFP-100 with a heat
slug on top for easy heat-sink access. The device is
built using TI's RF SiGe process technology, which
allows for maximum timing accuracy with low power.
PART NUMBER
THS789
Device Information
PACKAGE
BODY SIZE (NOM)
HTQFP (100)
14.00 mm × 14.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
SYNC
EVENT
T1
T2
T3
T1 - 0000 1100
T2 - 0011 1010
T3 - 1110 0010
T0429-01
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.