A-626 A-628 


A-626 A-628
Function Description The A-626,A-628 are 12-bit analog output boards with 16 channel digital input and 16 channel digital output .The A-626,A-628 boards support both current and voltage range .The output channel can be jumper selectable for different voltage range ;+/-10V, +/-5V, 0-5V, 0-10V and can sink 4-20mA current when connected to an external voltage source. On board reference chip BB Ref-01 is used for solving the thermo-drifting problem of the reference voltage Therefore A-626 is much better than 726 families for long period operation. Lattice FPGA on board can increase the stability of the board.
  • Backward compatible to 726 series
  • 6 or 8 analog output channels
  • 12 bit resolution
  • 0~5V,0~10V,*5V,*10V output range
  • 4-20mA current loop capability ,sink to ground
  • On board reference -5V,-10V
  • External reference *10V (max.) AC or DC
  • External Interrupt request signals, IRQ level from IRQ 3-IRQ 15
  • 16 channel digital input and 16 channel digital output Connects directly to DB-16P,DB-16R DN-20,DN-37 ,782,and 785 families


  •  Servo control
  •  Programmable voltage source
  •  Programmable current sink

  •  Product testing
Ordering Information
A-626  6 CHANNEL 12-BIT Analog Output and Digital I/O Board 
A-628 8 CHANNEL 12-BIT Analog Output and Digital I/O Board
Include software : NAPDOS for DOS applications
Software :
  • NAPWIN : Software Toolkit for Windows 95/98
  • NAPWNT: Software Toolkit for Windows NT 4.0
  • NAPVIEW: Software Toolkit for LabVIEW
  • NAPX:ActiveX Control (OCX) for Windows 95/98/NT
Analog Outputs
Number of analog output channels A-626, 6 ChannelA-628, 8 Channel
Resolution  12-bits
Type AD 7541 or equivalent
Differential linearity  1/2 LSB max. over temperature
Settling time less than 65 mS
Temperature drift  5ppm /*C max.
Relative Accuracy +/- 1 LSB max. 
Output Driving Capability  5mA max.
Current Loop Exciting Voltage 8V ~ 35V
Reference Voltage Internal -5V or -10V
  External  +10V or -10V max.
Digital I/O
Digital Input Channel 16 
Input low   VIL 0.8 V max.
IIL -0.4mA max. 
Input high  VIH  2.0V min
IIH  20*A max. 
Digital Outputs 16 
Output low  VOL  0.5 V max.
IOL 8mA max. 
Output high VOH 2.7V min
IOH -400*A max. 
Interrupt  channel 3~15
Power Requirements :
Power  Typical A-626/A-628 Maximal A-626/A-628 
+5V  450/500mA   0.9/1.1A 
+12V  50/60mA  110/130mA 
-12V  14/15mA  90/105mA 
General Environmental
Operating temp 0-50 deg C 
Storage temp -20  to  70 deg C 
Humility  0 to 90%  non-condensing 
Dimensions A-626 184mm X 123mm 
A-628 198mm X 123mm 
DB-16P  16 Channel isolated digital input Board 
DB-16R 16 Channel SPDT Relay Board
DB-37 directly connect signals to the back of A-626 / A-628 
DN-37 I/O Connector Block with DIN Rail Mounting and 37-PIN D-SUB Connector
DN-20 I/O Connector Block with DIN Rail Mounting and 20-PIN Header 
The A-626 & A-628 provide current loop. The user should need a external power supply to provide a bias voltage for FET. Please refer to the right hand side figure.