Operational Transconductance Amplifier

Not Recommended for New Designs.
Contact our Technical Support Center at 1-888-INTERSIL.

Typical Diagram

Diagram Not Shown

Key Features

    • Slew Rate (Unity Gain, Compensated) 50V/µs
    • Adjustable Power Consumption 10µW to 30µW
    • Flexible Supply Voltage Range ±2V to ±15V
    • Fully Adjustable Gain 0 to gMRL Limit
    • Tight gM Spread:
      • CA3080 2:1
      • CA3080A 1.6:1
    • Extended gM Linearity 3 Decades


The CA3080 and CA3080A types are Gatable-Gain Blocks which utilize the unique operational-transconductanceamplifier (OTA) concept described in Application Note AN6668, "Applications of the CA3080 and CA3080A High- Performance Operational Transconductance Amplifiers".

The CA3080 and CA3080A types have differential input and a single-ended, push-pull, class A output. In addition, these types have an amplifier bias input which may be used either for gating or for linear gain control. These types also have a high output impedance and their transconductance (gM) is directly proportional to the amplifier bias current (IABC).

The CA3080 and CA3080A types are notable for their excellent slew rate (50V/µs), which makes them especially useful for multiplexer and fast unity-gain voltage followers. These types are especially applicable for multiplexer applications because power is consumed only when the devices are in the "ON" channel state.

The CA3080A's characteristics are specifically controlled for applications such as sample-hold, gain-control, multiplexing, etc.


    • Sample and Hold
    • Multiplier
    • Multiplexer
    • Comparator
    • Voltage Follower


Design Tip

Can I use a current feedback amplifier (CFA) as an open loop comparator?

See More »

Is there somewhere I can find out what simulations and models (e.g. Spice, PSpice, IBIS) are available on your website?

See More »

iSIM Simulator

Select a category to start designing:

Enter design requirements:

Min Max
Vin: V V
Vout Iout
Output: V A
Min Max
Vin: V V
Vout Iout
Output: V A
Desired Closed Loop Gain:
Desired Min. Bandwidth:

Support | Ask An Expert

Need tech support for a product or design?
(Support FAQs)

Ask »

Follow Us Intersil Wins Outstanding Achievement in Web Development

Find pricing and availability for your part number. Order Parts, Eval Boards and Samples

Contact Sales »


Sign in to your account…
Search Orders    
Please Wait...


Simply Smarter