TDC-GPX2 datasheet(53/77 Pages) AMSCO

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ams Datasheet

Page 53

[v1-03] 2017-Dec-18

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TDC-GPX2 − Detailed Description

Examples for Read-Out Rate with LVDS

The conversion rate of measured stop events can be calculated

by dividing the bus frequency by the number of bits, which are

readout reference index and stop result. The number of bits is

configured by STOP_DATA_BITWIDTH and REF_INDEX_

BITWIDTH.

Figure 56:

Example Data Average Conversion Rate

Note(s):

1. Maximal throughput rate is only reached when the stop event rate at input is high enough

2. With CHANNEL_COMBINE = 1 (”Pulse Distance”) the throughput rate per stop input pin is doubled, as the stop events of one input

pin are alternatively measured and readout by two channels.

STOP_DATA_

BITWIDTH

REF_INDEX_

BITWIDTH

Sum

of Bits

LCLK

SDR Throughput

Rate

DDR Throughput

Rate

00 (14Bit)

000 (0Bit)

300MHz

21MSPS

42MSPS

00 (14Bit)

010 (4Bit)

300MHz

16MSPS

32MSPS

01 (16Bit)

000 (0Bit)

300MHz

18MSPS

37MSPS

01 (16Bit)

011 (8Bit)

300MHz

12MSPS

25MSPS

10 (18Bit)

000 (0Bit)

200MHz

11MSPS

22MSPS

10 (18Bit)

100 (16Bit)

200MHz

6MSPS

12MSPS

11 (20Bit)

000 (0Bit)

100MHz

5MSPS

10MSPS

11 (20Bit)

101 (24Bit)

100MHz

2MSPS

4MSPS

TDC-GPX2 Datasheet(PDF) 53 Page - ams AG

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