High Speed A/D converter 12-bit


Posted on Nov 3, 2012

This system performs a complete conversion of 12 bits in 10 p unipolar or bipolar. This converter is accurate to ± 12-bit LSB Y2 and a typical gain TC of 10 ppm / ° C. In unipolar mode, the system range is 0 V to 9.9976 V, with each bit having a value of 2.44 mY. For the accuracy of true conversion, an A / D converter must be trimmed so that, given the results just the exit code of input levels of Y2 Y2 LSB LSB below to above the exact voltage represents the code.



High Speed A/D converter 12-bit - image 1
Click here to download the full size of the above Image.

Therefore, the converter zero point should be cut with an input voltage of 1.22 mY; R trim until the LSB is just beginning to appear in the exit (all other bits "0") . For the entire scale, use an input voltage of 9.9963 V (10-VI LSB LSB Y2), then cut R2 until the LSB is just beginning to appear (all other bits "1 "). Bipolar signal range - 5.0 V to 4.9976 V. Bipolar offset cutting is done by applying a - 4.9988 V input signal and trimming R3 for LSB transition (all other bits "0"). On a large scale is determined by applying cutting R2 4.9963 V and the transition to LSB (all other bits "1").




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

6 x 6 Loop Antenna
IR Link
20 Khz ring counter
Wide range oscillator
Simplified-voltage-level-sensor
Application of MSP430F149 one-chip computer in the target designator design
arduino Switch transistor with a low voltage and current
Stabilized Adjustable Power Supply 0-15V/5A
Attaching a GPS module to the EB675001DIP
Novel FM receiver circuit diagram
Factory secondary low-voltage distribution electrical panel wiring diagram



Top