Technosoft iPOS80x0 BX-CAN, Техническое описание

Страница: 37 / 41


Technosoft 2019 37 iPOS80x0 BX-CAN/-CAT Technical Reference
3.8.12 Encoder #2 Inputs (A2+, A2-, B2+, B2-, Z2+, Z2-)
1
Min. Typ. Max. Units
Differential mode compliance TIA/EIA-422-A
Input voltage, differential mode
Hysteresis ±0.06 ±0.1 ±0.2
V
Differential mode -14 +14
Common-mode range (A+ to GND, etc.) -11 +14
Input impedance, differential
120
Ω
Differential mode 0 10 MHz
Differential mode 50 ns
ESD protection Human body model ±1 kV
3.8.13 Sin-Cos Encoder Inputs (Sin+, Sin-, Cos+, Cos-)
2
Min. Typ. Max. Units
Input voltage, differential Sin+ to Sin-, Cos+ to Cos- 1 1.25 V
PP
Input voltage, any pin to GND
Operational range -1 2.5 4
V
Absolute maximum values, continuous -7 +7
Absolute maximum, surge (duration
≤
1s)
†
-11 +14
Input impedance
Differential, Sin+ to Sin-, Cos+ to Cos- 4.2 4.7
kΩ
Common-mode, to GND 2.2
kΩ
Resolution with interpolation Software selectable, for one sine/cosine period 2 10 bits
Frequency
Sin-Cos interpolation 0 450 kHz
Quadrature, no interpolation 0 10 MHz
ESD protection Human body model ±2 kV
3.8.14 SSI encoder interface
Min. Typ. Max. Units
Differential mode compliance
(CLOCK, DATA)
1
TIA/EIA-422
CLOCK Output voltage
Differential; 50Ω differential load
2.0 2.5 5.0
V
Common-mode, referenced to GND 2.3 2.5 2.7
CLOCK frequency Software selectable 1000, 2000, 3000 kHz
DATA Input hysteresis Differential mode
±
0.1
±
0.2
±
0.5 V
Data input impedance Termination resistor on-board 120
Ω
DATA Input common mode range
Referenced to GND -7 +12
V
Absolute maximum, surge (duration
≤
1s)
†
-25 +25
DATA format Software selectable
Binary / Gray
Single-turn / Multi-turn
Counting direction
DATA resolution Total resolution (single turn or single turn + multi turn) 56 bit
Single-turn frame
n n-1 n-2 n-3 n-4 4 3 2 1
DT+
CK+
T T/2
1 2 3 4 5 n-3 n-2 n-1 n
MSB LSB
n single-turn bits
CK- and DT- signals have the same form with CK+ and DT+, but with opposite polarity.
Multi-turn frame
m+n m+n-1 m+n-2 m+n-3 m+n-4 n+4 n+3 n+2 n+1 DT+
CK+
T T/2
1
2 3 4
5
m-3 m-2 m-1 m
MSB LSB
m multi-turn bits
n n-1 n-2
n-3
n-4 4 3 2 1
m+1
m+2 m+3 m+4
m+5
m+n-3 m+n-2 m+n-1 m+n
MSB LSB
n single-turn bits
CK- and DT- signals have the same form with CK+ and DT+, but with opposite polarity.
1
Encoder #2 differential input pins have internal
120Ω
termination resistors connected across
2
For many applications, a termination resistor should be connected across SIN+ to SIN-, and across COS+ to COS-. This can be
achieved by setting SW3 pins 3,4 and 5 to ON. Please consult the feedback device datasheet for confirmation.