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Very basic question I'm sure

I am trying to buy components for a project I am doing, but I cant get the name of a component right yet. But it has to exist somewhere.

I want a resistor array but instead of the resistors in parallel I want them in series with a point to take a measurement off after each resistor.

I have inserted a circuit if I have not been clear enough.

schematic

simulate this circuit – Schematic created using CircuitLab

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Basically my idea is to have Vcc and GND on the end two pins and the take a voltage off after each resistor. I'm using this to get an analog signal of the different voltage to select different settings in my micro processor.

I don't mind using just a bunch of resistors, but I would like it in a one package device for a neater board and a bit of space saving.

Any ideas of the name of the component ?

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  • \$\begingroup\$ ah, I was worried that it could be something like that, Thanks Guess Ill just have to go for the extra parts and use a bunch of resistors. \$\endgroup\$ – Spider999 Jul 15 '17 at 10:26
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They are generally called resistor networks. The specific type you are looking for is called a series network.

E.g.: Bourns

enter image description here

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  • \$\begingroup\$ The "isolated" variant can also be used in this case, by simply connecting the individual segments in series. I believe that the isolated variant is much more common, so this could still be a viable option. \$\endgroup\$ – pipe Jul 15 '17 at 10:49
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They are often called "resistor networks" or "resistor arrays". The most popular types in SMT have 4 isolated resistors or have more resistors with a common (for pull-ups or pull-downs). In ultra-precision, dividers are common, but usually with only two resistors.

For example, for your shown 100 ohms, you could use one of these parts (CTS 742C163101JP), and jumper the ends.

enter image description here

Personally, I prefer to use arrays of 4 isolated resistors because they can be used in many places- depending on your mounting cost they may be cost-effective even if one or two resistors remain unused or are connected in series or parallel to make a second value- for example you can get the equivalent of 4 0603 resistors in the space of one 1206. There are also much smaller parts if you like.

As the 4-resistor networks are quite popular, you will also have better luck if you are looking for tighter tolerance such as 1% or 0.1% rather than the usual 5% tolerance. The below parts (Vishay ACASA1000S1000P1AT) give you 4x 0.1% 100 ohm resistors for only about 50 cents a pack in 100's.

enter image description here

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