Measurement Computing USB-3100 Series, User Manual

Page: 23 / 26

USB-3102 User's Guide Specifications
23
EEPROM 256 bytes
EEPROM configuration
Address range Access Description
0x000-0x0FF Read/write 256 bytes user data
Microcontroller
Table 11. Microcontroller specifications
Type High performance 8-bit RISC microcontroller
Program memory 16,384 words
Data memory 2,048 bytes
Power
Table 12. Power specifications
Parameter Conditions Specification
Supply current USB enumeration < 100 mA
Supply current (Note 11) Quiescent current 140 mA typ.
+5V user output voltage range (Note 12) Available at terminal block pin 56 4.5 V min, 5.25 V max.
+5V user output current (Note 13) Available at terminal block pin 56 10 mA max.
ITEST output voltage range Available at terminal block pin 51 13V, ±1% typ.
ITEST output current (Note 14) Available at terminal block pin 51 30mA max.
Note 11:
This is the total quiescent current requirement for the USB-3102 which includes up to 10 mA for
the status LED. This does not include any potential loading of the digital I/O bits, +5V user
terminal, ITEST, or the VOUTx/IOUTx outputs.
Note 12:
Output voltage range assumes USB power supply is within specified limits.
Note 13:
This refers to the total amount of current that can be sourced from the +5V user terminal (pin 56)
for general use. This specification also includes any additional contribution due to DIO loading.
Note 14: This refers to the total maximum amount of current that can be sourced from the ITEST user
terminal (pin 51). The ITEST terminal pin should only be used for biasing individual IOUTx
outputs in order to facilitate functional testing. A load resistor of 100Ω should be placed in series
between the ITEST pin and the IOUTx pin for proper operation.
USB specifications
Table 13. USB specifications
USB device type USB 2.0 (full-speed)
USB device compatibility USB 1.1, 2.0
USB cable length 3 meters max.
USB cable type A-B cable, UL type AWM 2527 or equivalent (min 24 AWG VBUS/GND,
min 28 AWG D+/D-).