Product Overview
Fairchild KA358A Dual Operational Amplifier - DIP-8, 100dB Gain, Single or Split Supply
Condition
Unused NOS. Visual inspection confirms clean leads and intact markings - photos show the specific units you will receive. Sourced from an electronics distributor consolidating inventory. Covered by our no-hassle guarantee.
Ships same or next business day from our Idaho warehouse. Reliable parts since 1999. Honest pricing, no nonsense.
Product Overview
Fairchild KA358A dual operational amplifier in an 8-pin DIP package. Two independent op-amp channels per IC, internally frequency compensated for unity gain. Operates from a single supply (3V to 32V) or a split supply (±1.5V to ±16V), with an input common-mode range that includes ground - useful for single-supply circuit designs where the signal can swing down to the negative rail.
Key Features
- Dual op-amp: two independent amplifier channels in one DIP-8 package
- DC voltage gain: 100dB typical
- Single supply range: 3V to 32V
- Split supply range: ±1.5V to ±16V
- Input common-mode voltage range includes ground
- Output voltage swing: 0V DC to Vcc minus 1.5V DC
- Input offset voltage: 7mV maximum
- Input bias current: 45nA typical
- Output current: 30mA typical per channel
- Internally frequency compensated for unity gain - no external compensation needed for basic configurations
- Operating temperature: 0°C to +70°C
- Package: DIP-8 - breadboard and through-hole PCB compatible
Applications
- Hobbyist amplifying a weak microphone signal - connect the mic to one channel, set gain with two resistors, and feed the output into a small speaker stage or recording interface
- Maker conditioning a temperature or pressure sensor output to match an Arduino or similar microcontroller ADC input range - amplify and level-shift in one compact IC
- Repair technician swapping a failed op-amp from a consumer or industrial board - direct drop-in where a KA358A or LM358-family part is called out, no circuit modification needed
- Prototype builder incorporating a low-complexity dual gain block into a small audio mixer, comparator circuit, or DC signal conditioner
- Experimenter wiring up a basic active filter, summing amplifier, or voltage follower on a breadboard - the DIP-8 footprint seats cleanly in standard breadboard rails
Frequently Asked Questions
Is this a direct replacement for an LM358 or LM358N?
The KA358A is cross-referenced with the LM358 series and is functionally similar. For most general-purpose circuit replacements the pinout and electrical behavior align closely. For critical or precision applications, compare the specific parameters in each part's datasheet before substituting.
What package is this, and will it fit my board?
DIP-8 - 8-pin dual in-line package, 0.1-inch pin spacing, 0.3-inch row width. Fits standard DIP-8 IC sockets, through-hole PCB footprints, and full-size breadboards without modification.
Does this work on a 5V single supply, such as an Arduino-powered circuit?
Yes. The supply voltage range starts at 3V, so a 5V single supply falls comfortably within the operating range.
Is a manual or datasheet included?
Not included. The KA358A is a widely documented part - datasheets are available through component distributor sites and semiconductor archives.
Two channels, one chip, a pair of resistors, and a power rail - the KA358A has been doing real work in circuits for decades. Whatever you are building or fixing, this one is ready to go back to work.
