XJ128 and XJ128 Plus Printhead
XJ128 Guide to Operation
Xaar Document no: D031010302 Version A
Page 29
6.1.3 Recommended electrical operating conditions
To ensure proper and reliable operation of the printhead use the following electrical operating
conditions shown in table 6.5. Please also refer to the Ink and Printhead User Guide documentation,
which may detail different operating conditions for specific inks.
Parameter
Symbol
Min
Typ.
Max
Unit
Logic supply voltage
VDD
4.5
5.0
5.5
V
High voltage high current supply
VPPH
-
35.0
36.0
V
High voltage low current supply
VPPL
34.0
35.0
36.0
V
High level inputs signal voltage
VIH
0.8 x VDD
5.0
VDD
V
Low level inputs signal voltage
VIL
0
0
0.2 x VDD
V
High current, high voltage supply current
IPPH
-
-
400
mA
Low current, high voltage supply current
IPPL
-
1.7
5.0
mA
Clock frequency
CLK
0.95
1.0
1.05
MHz
Table 6.5
–
Recommended electrical operating conditions
Table 6.6 describes the maximum current and loading for the printhead signals not already detailed
in this document.
Parameter
Symbol
Max input current
Max input load
Unit
Chip select for MOSI/MISO
–
chip 1
nSS1
1.0
-
A
Chip select for MOSI/MISO
–
chip 2
nSS2
1.0
-
A
High temp error signal
nFAULT
-
4.0
mA
Driver chip logic reset
nRESET
1.0
-
A
Serial data input select
MOSI
3.0
-
mA
5V logic supply
VDD
2.0
-
mA
Main sample clock
SCK
1.0
-
mA
‘
Printhead ready
’
used for signal timing
READY
-
4.0
mA
Phase order select
PHO
1.0
-
mA
Printhead
‘
fire
’
trigger signal
nFIRE
1.0
-
mA
Serial data output select
MISO
-
4.0
A
State machine clock
CLK
1.0
-
mA
Table 6.6
–
Signal current and loading details
Table 6.7 shows the typical and maximum power consumption expected when operating the XJ128
printhead.
Typical Power Consumption
Max Power Consumption
Unit
XJ128/200
XJ128/200 Plus
3
6
Watts
XJ128/360
3
6
Watts
Table 6.7
–
Power consumption of XJ128 printhead
