The GFT144 module is a Four Channel Programmable Delay module designed for component test, data de-skewing and timing adjustment. This compact module is well suited for OEM application with an interface via 2 standard connectors, a small size and only one power source.
The core of the module is made with a component (QFN 56 pins) specially designed by Greenfield Technology.
The required delay is accomplished by programming each delay channel via Serial Data Interface. The delay as an increment resolution of typical 0.5 ps in the programmable delay range of 7 ns per channel.
The channel input can be driven directly by differential LVPECL / CML or LVDS logic levels. The output is compatible with DC or AC LVPECL.
Typical GFT144 application would be to control from FPGA application the four timing of a device with high rate and very high resolution.
Overview
- Four independent delay channels
- Programmable delay in 0.5 ps increments
- 7 ns delay range
- <3 ps input to output RMS jitter
- Up to 50 MHz channel rate
- LVPECL / CML / LVDS channel input
- LVPECL channel output with MUX mode
- Delay control via SPI link
- Operate from DC +5 V
- Compact module: 40 x 25 mm
- Option: Evaluation board with TTL outputs and USB control
• Components Test
• OEM Application
• Data de-skewing
• Timing adjustment
Specifications
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Delay Channel |
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Number |
4 |
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Range |
7 ns @ 150 MHz (or 5ns @ 200 MHz) clock input |
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Resolution |
0.5 ps typical |
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Linearity |
±50 ps maximum (without correction) |
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Jitter RMS |
3 ps (input to output) |
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Channel Input |
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Level |
LVPECL / CML / LVDS |
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Minimum width |
10 ns |
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Maximum width |
Up to 1 s |
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Connector |
Samtec |
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Channel Output |
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Level |
LVPECL |
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Rate |
DC to 50 MHz |
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External Load |
50/50 Ω and 50 Ω (see page 3) |
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Rise Time |
750 ps |
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Fall Time |
750 ps |
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Insertion Delay |
<5ns (input to output) |
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Mux mode |
1 to other channel outputs |
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Connector |
Samtec |
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Clock input |
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Level |
LVPECL |
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Frequency |
150 MHz to 200 MHz |
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General specifications |
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Control |
SPI, Serial data interface |
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Size |
40.0 x 25.0 x 10.0 mm |
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Power V/A |
+5 V / 200mA max. |
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Power connector |
Samtec |
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Option : Evaluation board |
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Outputs |
TTL level (adjustable 1.5 to 5 V under 50 Ω) |
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Trigger mode |
Internal (from programmable timers) or external |
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Interface control |
USB to UART |
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Software tool |
The board is supplied with window software application which include a front panel graphical interface. |
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Power Adapter |
External AC (90 -240V) to DC (+ 5V) adapter furnished |
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