LF442ACN Texas Instruments In Stock
LF442ACN is a dual JFET-input low-power operational amplifier by Texas Instruments with 1MHz gain-bandwidth product. Key specs: ±18V supply range, 200nA maximum input bias current, 8-pin DIP package. From competitive pricing, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $7.8000(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LF442ACN?
- Dual JFET input channels in a single 8-pin DIP deliver ultra-low 200nA bias current, ideal for high-impedance sensor amplification without external buffers
- Low 200µA quiescent current per channel enables long battery life in portable measurement instruments and remote data loggers powered by primary cells
- Wide ±18V supply range accommodates split ±15V laboratory bench supplies and industrial measurement systems operating from ±12V rails
- 1MHz gain-bandwidth product supports active filter designs and audio-range signal conditioning stages up to several hundred kilohertz
- Industry-standard 8-pin DIP package simplifies prototyping and direct replacement of legacy LF353 or TL082 dual op-amp circuits on existing PCBs
What is LF442ACN used for?
The LF442ACN is used in precision integrators, sample-and-hold circuits, and charge-amplifier front-ends for piezoelectric sensors where the ultra-low 200nA JFET input bias current minimizes output droop and offset errors. It also serves in audio signal processing chains and active bandpass filter stages operating from ±15V split supplies, benefiting from the 1MHz bandwidth and low noise. Its low 200µA per-channel quiescent current makes it a practical choice for battery-powered field instruments and portable oscilloscope input stages requiring dual-channel amplification.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LF442ACN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 200nA maximum bias current of LF442ACN benefit a charge amplifier for a piezoelectric accelerometer?
A piezoelectric sensor presents source capacitance of 100pF to 1nF and requires an amplifier with bias current well below 10nA per picofarad to limit charge leakage error. The LF442ACN 200nA maximum bias current, spread across a 1nF sensor capacitor, generates a leakage rate of only 0.2mV/ms, allowing integration times of several milliseconds before the output drifts beyond a 1mV error budget in low-frequency vibration measurements.
What gain-bandwidth product does LF442ACN offer, and which audio filter topologies does it support?
The LF442ACN provides a 1MHz gain-bandwidth product, sufficient to implement Sallen-Key or multiple-feedback active filter topologies with cutoff frequencies up to about 200kHz at unity gain or up to 10kHz at 100V/V closed-loop gain. This makes it practical for audio crossover networks, anti-aliasing filters ahead of audio ADCs, and equalizer stages in benchtop audio analyzers.
How does LF442ACN power consumption compare to the LF353 in a dual-channel portable data logger?
Both devices share the same LF442/LF353 family architecture, but the LF442ACN is the low-power variant consuming approximately 200µA per channel versus the 1.8mA per channel of the LF353. Running both channels from a 9V battery, the LF442ACN draws 3.6mW total compared to 32.4mW for LF353, extending battery life by approximately 9x in continuously powered logging applications.
Can LF442ACN substitute for an LF353 directly on an existing dual ±15V instrumentation PCB?
Yes, the LF442ACN is pin-compatible with the LF353 in the 8-pin DIP package, so it drops into the same footprint without PCB modification. Both devices operate from ±5V to ±18V split supplies, share the same 1MHz gain-bandwidth and 8V/µs slew rate family, and use the standard non-inverting and inverting input configuration. The substitution immediately reduces per-channel supply current from 1.8mA to 200µA with no circuit redesign.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $11.7000 | $11.70 |
| 4+ | $8.5800 | $34.32 |
| 10+ | $7.8000 | $78.00 |
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