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TDC-GPX: G-Mode

  • 2 channels with 41 ps BIN
  • Differential LVPECL inputs
  • Measurement range 0 ns to > 10 µs
  • 5.5 ns pulse-pair resolution between edges of equal slope with 32-fold multi-hit = 200 MHz peak rate
  • Pulsewidth measurement down to 1.5 ns
  • Trigger to rising and falling edge
  • Optional Quiet Mode (no ALU operation and Data-output during measurements)
  • 20 MHz continuous rate per channel
  • 40 Mhz continous rate per chip

Timings

Par.

Time (Condition)

Description


 

Min.

 

 

Max.

 


tph/tpl

 

1.5 ns

 

 

-

 

Positive/Negative pulse width

tss

 

0 ns min
*5.2 ns

 

 

64 µs

 

Start to Stop

trr

 

5.5 ns (typ.)

 

Rising edge to rising edge

tff

 

5.5 ns (typ.)

 

Falling edge to falling edge

 

1.5 ns (typ.)

 

Rising edge tofalling edge

 

1.5 ns (typ.)

 

Falling edge to rising edge

tva


 

182 ns

 

ALU start to data valid

 

 


* with StopDisStart =1

Resolution

BIN size
at 3.3V, 25°C:

Best
32ps

Typical
41ps

Worst
56ps

Standard deviation:

1 LSB +
4ps * dt/µs

 

 

G-Mode

(Click to enlarge)

Schematics

G-Mode Input circuit

(Click to enlarge)

Input Circuit