Analog Input Terminals (Ch0 In - Ch7 In) - Measurement Computing USB-1208LS User Manual

USB-1208LS User's Guide
4-channel differential mode pin out

Analog input terminals (CH0 IN - CH7 IN)

You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (CH0 IN
through CH7 IN). Refer to the
You can configure the analog input channels as eight single-ended channels or four differential channels. When
configured for differential mode, each analog input has 12-bit resolution. When configured for single-ended
mode, each analog input has 11-bit resolution, due to restrictions imposed by the A/D converter.
Single-ended configuration
When all of the analog input channels are configured for single-ended input mode, eight analog channels are
available. The input signal is referenced to signal ground (GND), and delivered through two wires:
! The wire carrying the signal to be measured connects to CH# IN.
! The second wire connects to GND.
The input range for single-ended mode is ±10V. No other ranges are supported in single-ended mode. Figure
3-3 illustrates a typical single-ended measurement connection.
pinout diagrams on page 3-4 for the location of these pins.
3-4
8-channel single-ended mode pin out
Functional Details