User Manual

USB-1208LS User's Guide Specifications
21
Non-volatile memory
Table 10. Memory specifications
Parameter Specification
Memory size
8192 bytes
Memory configuration
Address Range Access Description
0x0000 – 0x17FF
Read/write
A/D data (4K samples)
0x1800 – 0x1EFF
Read/write
User data area
0x1F00 – 0x1FEF
Read/write
Calibration data
0x1FF0 – 0x1FFF
Read/write
System data
Power
Table 11. Power specifications
Parameter Conditions Specification
Supply current (Note 5)
20 mA
+5V USB power available (Note 6)
Connected to self-powered hub
4.5 V min, 5.25 V max
Connected to bus-powered hub
4.1 V min, 5.25 V max
Output current (Note 7)
Connected to bus-powered hub
450 mA min, 500 mA max
Connected to bus-powered hub
50 mA min, 100 mA max
Note 5: This is the total current requirement for the USB-1208LS which includes up to 5 mA for the status
LED.
Note 6: Self-powered refers to USB hubs and hosts with a power supply. Bus-powered refers to USB hubs and
hosts without their own power supply.
Note 7: This refers to the total amount of current that can be sourced from the USB +5V, analog outputs, and
digital outputs.
General
Table 12. General specifications
Parameter Conditions Specification
USB controller clock error
25 °C
±30 ppm max
0 °C to 70 °C
±50 ppm max
Device type
USB 1.1 low-speed
Device compatibility
USB 1.1, USB 2.0
Environmental
Table 13. Environmental specifications
Parameter Specification
Operating temperature range
–0 °C to 70 °C
Storage temperature range
–40 °C to 70 °C
Humidity
0% to 90% non-condensing