Jäger ADwin-Gold-USB, Руководство пользователя

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Annex
ADwin
A-4
ADwin-Gold USB / ENET, manual version 3.8, October 2005
CO1 Add-On
Parameters
Symbol Conditions min. typ. max. Unit
Counter
Number
4 counters (CNTR1 … CNTR4)
Inputs
For each counter 3 differential inputs (A/CLK, B/DIR, CLR/LATCH); counter inputs
programmable in pairs for differential or TTL mode (single-ended)
Counter resolution 32 Bit
Count frequency
f
CLK
Input CLK 20
MHz
Input A/B 5
Latch width LATCH 32 Bit
Reference quartz oscillator
Reference frequency
f
ref
20
MHz
Prescaler by 4
f
ref
/ 4
5
Accuracy and Drift 100 ppm
Counter inputs differential
a
Differential input thresh-
old voltage
V
TH
-10V
≤
V
CM
≤
13.2V
-200 +200 mV
Input hysteresis
∆
V
TH
-10V
≤
V
CM
≤
13.2V
40 mV
Range of common mode
voltage
V
CM
-10 +13.2 V
Differential slew rate 0.33 V/µs
Permissible differential
input voltage
for each input ±3.9 V
Counter inputs single ended
b
(with Schmitt trigger)
Edge recognition, pos. V
T+
(Low)
V
CC
= 5V
1,65 1,9 2,15
V Edge recognition, neg. V
T-
(Low) 0,75 1,0 1,25
Switching hysteresis V
T+
- V
T-
0,4 0,9
Input current
I
H
V
I
= 2,7V 20
µA
I
L
V
I
= 0,4V -50
a. see also data sheet MAX3098 from MAXIM
b. see also data sheet 74LS19 from Texas Instruments