Programmable Voltmeter Chip?

Electronics Computer Programming Q&A
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Location: NewJersey

Programmable Voltmeter Chip?

Post by MrAl » Thu Apr 17, 2008 7:05 pm

Hi there,

I'm looking for a programmable chip that can do AD and maybe
has autoranging, or where the chip can be given commands to
switch ranges such as 10v full scale, 1v full scale, 0.1v full scale,
etc. Would be nice if the chip was also set up to do ohms.
Should have min of 4 full digits perfer 4.5 digits.

Alternately, a AD voltage measuring chip (autoranging perhaps)
that outputs whatever range it is set to... ie if set to 10v full scale
then it outputs a '10' perhaps in binary.
Should have min of 4.5 digits.

If none of the above, then at least a decent (maybe 5 digits) voltmeter
chip that has the ability to read a switch to change ranges.

If still none of the above, then how about a decent 5 digit voltmeter
chip to start with?

Very last on the list would be a 4 digit meter chip (reads 9.999 volts
or 19.999 volts (4.5 digits).

Thanks much.
LEDs vs Bulbs, LEDs are winning.

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Dave Dixon
Posts: 436
Joined: Thu May 01, 2003 1:01 am
Location: Wichita, KS

Post by Dave Dixon » Fri Apr 18, 2008 5:21 am

Intersil's (Harris'??)ICL7135 isn't programmable, but I've used that family before with good results. 4 1/2 digits.
Accuracy Guaranteed to ±1 Count Over Entire ±20000 Counts (2.0000V Full Scale)
Guaranteed Zero Reading for 0V Input
1pA Typical Input Leakage Current
True Differential Input
True Polarity at Zero Count for Precise Null Detection
Single Reference Voltage Required
Overrange and Underrange Signals Available for Auto-Range Capability
All Outputs TTL Compatible
Blinking Outputs Gives Visual Indication of Overrange
Six Auxiliary Inputs/Outputs are Available for Interfacing to UARTs, Microprocessors, or Other Circuitry
Multiplexed BCD Outputs

Added: Check out their HI-7159A - I missed it first glance!
Good luck,

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