Data Acquisition System I


Posted on Jul 6, 2012

The HI-506 multiplexer is used as an analog input selector, controlled by a binary counter to address the appropr


Data Acquisition System I
Click here to download the full size of the above Circuit.

iate channel. The HA-5330 is a high-speed sample and hold. The sample/hold con- trol is tied to the status (STS) output of the HI-774A; whenever a conversion is in process, the S/H is in the hold mode. A conversion is initiated when the clock input becomes low; when the clock becomes high, the mux address changes. The mux will be acquiring the next channel while the ADC is converting the present input, held by the S/H. The clock low time should be between 225 ns and 6.5 jus, with the period greater than 8.5 $. With this timing, T/C will be high at the end of a conversion, so the output data will be valid - 100 ns before STS goes low. This allows STS to clock the data into the storage register. The register address will be offset by one; if this is a problem, a 4-bit latch can be added to the input of the storage register. With a 100-kHz clock rate, each channel will be read every 160us.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Digital Thermometer
18 LED sequencer timer
Bench top power supply
Transistor Turns Op Amp On Or Off
Fog Lamp Sensor Circuit
Dynamic Microphone Amplifier
lm317 universal battery charger circuit
air craft receiver
Cable TV amplifier
Solar Water Heating Pump Controller
555 Composition with Watchdog circuit
Single-ended Class A amplifier circuit diagram of 6N1 + 6P3P
High-performance recording front end circuit



Top