DEMO MANUAL DC1410A Load Cell Digitizer Application Description Demonstration circuit 1410A shows a compact, high include 5ppm INL, 5V offset, 10ppm full-scale error resolution solution for measuring Wheatstone bridge type and 20nV/C offset drift. In the 6.9Hz/200nV mode, RMS sensors for load, pressure, temperature, acceleration, and input normal mode rejection of 50Hz and 60Hz noise is many other physical quantities. better than 80dB. Assembly type A features the LTC2498, an 8-/16-channel, Both assembly types include a low noise programmable 24-bit ADC with easy drive inputs. Key DC specifications gain amplifier (PGA) and calibration sources to facilitate include 2ppm INL, 1ppm offset, 25ppm full-scale error transparent calibration of gain and offset, resulting in an and 10nV/C offset drift. In the 6.8Hz/600nV mode, effective resolution of better than 20nV at 6.8Hz and RMS RMS input normal mode rejection of 50Hz and 60Hz noise is 6.9Hz respectively. better than 87dB. Design files for this circuit board are available at Assembly type B features the LTC2449, an 8-/16-channel, DEMO MANUAL DC1410A a ssembly o Table 1. Demonstration Circuit Output Options ASSEMBLY TYPE ADC OUTPUT RATES PGA OP AMP, GAIN OPTIONS FINAL ADC DRIVER OP AMP 7.5Hz (1x Mode) LT1678 DC1410A-A LTC2498 None 15Hz (2x Mode) G = 1, 8, 16, 32 4kHz (OSR = 64) LT1678 DC1410A-B LTC2449 LTC6241 6.9Hz (OSR = 32768) G = 1, 8, 16, 32 Quick s tart p D Figure 2. DC1410 Connected to the Linduino 1. Insert the DC1410A on to the Linduino (DC2026). Figure Linduino. Follow the procedure for installing QuikEval 2 shows the correct orientation. and the LTSketchbook in the DC2026 demo manual. + 2. Ensure the COM jumper is set to GND, AMP V jumper 5. Operation with QuikEval GUI: Connect the Linduino to the is set to 5V, and AMP V is set to GND. host PC using a USB cable and upload the DC590 en- hanced sketch located in the directory: 3. Connect the sensor to the desired channel inputs (CH0 to CH11). Analog signal connections are made via the Sketchbook Utilities DC590 Enhanced row of turret posts along the edge of the board. Also, if Run the QuikEval program, which will download the ap- you are connecting the board to an existing circuit, the propriate GUI, refer to Figure 3. Click the collect button exposed ground planes along the edges of the board may to start reading the input voltage. The collect button be used to form a solid connection between grounds. changes to the stop button when the user is collecting 4. DC1410 can be controlled either from a GUI control data. Stop the collection and click on the configure panel that is part of the QuikEval program or from a button to change the oversample ratio (OSR). Chan- microcontroller program (Sketch) running directly on the nel gain, custom scaling, and filter parameters can be dc1410af 2 ure roce ptions