Technosoft 2018
11
iPOS4808 VX Technical Reference
Encoder Inputs (A/A+, A-, B/B+, B-, Z/Z+, Z-)
Min.
Typ.
Max.
Units
Single-ended mode compliance
Leave negative inputs disconnected
TTL / CMOS / Open-collector
Input voltage, single-ended mode
A/A+, B/B+
Logic “LOW”
1.6
V
Logic “HIGH”
1.8
Floating voltage (not connected)
4.5
Input voltage, single-ended mode
Z/Z+
Logic “LOW”
1.2
V
Logic “HIGH”
1.4
Floating voltage (not connected)
4.7
Input current, single-ended mode
A/A+, B/B+, Z/Z+
Logic “LOW”; Pull to GND
2.5
3
mA
Logic “HIGH”; Internal 2.2K
Ω
pull-up to +5
0
0
0
Differential mode compliance
For full RS422 compliance, see
TIA/EIA-422-A
Input voltage, differential mode
Hysteresis
±0.06
±0.1
±0.2
V
Common-mode range (A+ to GND, etc.)
-7
+7
Input impedance, differential
A+ to A-, B+ to B-
4.2
4.7
kΩ
Z+ to Z-
6.1
7.2
Input frequency
Single-ended mode, Open-collector / NPN
0
500
kHz
Input frequency
Differential mode, or Single-ended driven
by push-pull (TTL / CMOS)
0
10
MHz
Minimum pulse width
Single-ended mode, Open-collector / NPN
1
µS
Differential mode, or Single-ended driven
by push-pull (TTL / CMOS)
50
nS
Input voltage, any pin to GND
Absolute maximum values, continuous
-7
+7
V
Absolute maximum, surge (duration
≤
1s)
†
-11
+14
ESD protection
Human body model
±1
kV
Linear Hall Inputs (LH1, LH2, LH3)
Min.
Typ.
Max.
Units
Input voltage
Operational range
0
0.5÷4.5
4.9
V
Absolute maximum values, continuous
-7
+7
Absolute maximum, surge (duration
≤
1s)
†
-11
+14
Input current
Input voltage 0…+5V
-1
±0.9
+1
mA
Interpolation Resolution
Depending on software settings
11
bits
Frequency
0
1
kHz
ESD protection
Human body model
±1
kV
1
For full RS-422 compliance, 120
Ω
termination resistors must be connected across the differential pairs, as close as
possible to the drive input pins. See
incremental encoder connection
