8 bit temperature sensor

[mr_anderson]

8 bit temperature sensors

hi every one .
i need to make an 8 bit temperature sensor it consists of
{{{{ temp sensor ( with analogue output) +amplifier to amplify the signal + ADC ( TTL voltages not CMOs) }}}}}
does any one have such a design but with appropriate values , thank you

 

[binhjuventus]

hih-3610 + adc0808

You want an electronic component which integrate all of three functions or discret components which assembled together to do these functions?

If you are of the second case, I recommend you to use LM335 to gather temperature infors in the form of voltage, to put noise out of this result, you should use a buffer stage by connecting with an Op-Amp, and then set it to the input of and ADC like ADC0808.

I hope this helps you

 

[narfnarf]

8 bit temp sensor

if u want to make it easier and don't use a ADC then you can use maxim-ic DS1820, a 3 pin (1-WIRE) digital output temperature sensor.

I think there might even be one that lives off parasitic power.

 

[nguyennam]

In your case, narfnard's advice is the best solution.

nguyennam

 

[mabauti]

I have the DS1820 + PIC , if you want it mr_anderson.

 

[umup]

Or LM75

 

[mr_anderson]

thank u very much u really helped me , but binhjuventus said the noise will effect the circuit can u plz explain more i mean how it will effect it and how i can minimize it by using the op-amp .
thank u again u are really great guys . by the way can i reaplace the temperature sensor with a humidity sensor in the same circuit and thank u again

 

[umup]

by the way can i reaplace the temperature sensor with a humidity sensor

Sensirion makes humidity/temperature sensors with digital interface :
**broken link removed**

Thare are also humidity sensors with analog output from many manufacturers, but they require ADC :
**broken link removed**
http://www.humirel.com/
http://www.hdk.co.jp/pdf/eng/e1321aa.pdf