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TLV2434A: 20 year old data sheet error

chris svanberg
Prodigy 250 points
Part Number: TLV2434A
Other Parts Discussed in Thread: TLV9104

The data sheet correctly names pin 4 as "VDD+" but pin 11 is also "VDD_/GND".
The circuit for the part consist of all FET's so the negative rail should be VSS, not VDD, and as this is a rail-to-rail OP-amp its likely to be used with a "5-V Single Supply", so the "VDD_/GND" could alternatively just be called "GND".

https://en.wikipedia.org/wiki/IC_power-supply_pin

  • 0
    Guru 140200 points

    Hi Chris,

    this is just a name and there's no law which dictates how a pin has to be named. It only was an error, if it would misguide you in such way that you connect the OPAmp in a wrong way, by swapping the supply voltage pins, for instance.

    Kai

  • 0
    TI__Mastermind 19107 points

    Hey Chris, 

    There are many ways to denote the positive and negative power supply. 
    Some of which include: 

    Positive: V+, VCC, VDD, VDD+, etc. 

    Negative: V-, VEE, VDD-, etc. 

    I agree that VDD is usually used to denote the positive power supply, but in this case I believe the negative sign makes it clear that this is the negative power supply. Additionally, since the op amp can be used in a dual supply configuration it is important that the datasheet shows that in the pinout. 

    There is no error here. If you would like, you may use the TLV9104, which is the drop-in replacement with upgraded functionality. It may have a datasheet more up to your liking. 

    All the best,
    Carolina 

  • 0 in reply to Caro Walter
    Prodigy 250 points

    Can you give me examples of any of your op-amps with a "VDD-"?

  • 0 in reply to chris svanberg
    TI__Mastermind 19107 points

    Hey Chris, 

    Sure, some of our legacy parts seem to use this same architecture. The LM148JAN-SP datasheet shows both VCC+ and VCC-. Similar to how TLV2374A shows both VDD+ and VDD-. 

    All the best,
    Carolina