NEWS RELEASE

FOR INFORMATION CONTACT:

Linear Systems, Inc.

Sales Department

Phone: (510) 490-9160

Email: sales@linearsystems.com

Build lower-voltage, lower-power circuits using Linear Systems' industry-leading voltage-controlled resistors.

Linear Systems has expanded its family of JFET Voltage-Controlled Resistors (VCRs) for reduced-power circuits over IC-based devices. Two new additions to the JFET Voltage-Controlled Resistor Family include the LS26VNS, a Single N-Channel JFET VCR, and the LS26VPS, a Single P-Channel JFET VCR. Both the N and P-channel versions are made from the same die geometry, making them complementary. They join the existing VCR11N, a Dual N-Channel VCR. The advantages of using VCRs for voltage-controlled amplifier or voltage-controlled gain systems include:

- VCR-based devices operate with lower voltage and power consumption, enabling battery-powered systems to last significantly longer.

- VCR JFETs can be used with low-power op amps to provide a low-power solution for voltage-controlled gain systems.

- With low voltage op amps such as the LMV358 or TLC272, VCR JFETs perform voltage-controlled gain at extremely low supply voltages, down to a single 3.3V power supply. Circuits can be designed for very low power consumption when combined with low voltage, low power op amps. For instance, using an LSK389A as a VCR for these low voltage circuits can provide significant efficiency gains.

- Matched pair JFET VCRs (VCR11N or LSK389A) can provide two identical channels of voltage-controlled gain, where the control voltage tracks both channels. This can be used in stereo audio signal attenuation.

In contrast, typical active voltage-controlled amplifiers drain more current and require higher minimum power supply voltages, needing at least +/- 4 volts for a specialized voltage control amplifier integrated circuit.

P-Channel JFETs, including a J177, can be designed as a VCR circuit with a single power supply. For example, the P-Channel JFET VCR circuit is ideal with positive supply voltages since its control voltage to the gate is also positive.

Product Details:

- LS26VNS N-Channel Single JFET VCR:

Drain-source resistance is controlled by a DC bias voltage (VGS) applied to a high impedance gate terminal. Minimum RDS of 14 Ω occurs when VGS = -1.0V. As VGS approaches the pinch-off voltage of -6.0V, RDS rapidly increases to the maximum value of 38 Ω.

- LS26VPS P-Channel Single JFET VCR:

Drain-source resistance is controlled by a DC bias voltage (VGS) applied to a high impedance gate terminal. Minimum RDS of 20 Ω occurs when VGS = 3.0V. As VGS approaches the pinch-off voltage of 7.5V, RDS rapidly increases to the maximum value of 50 Ω.

Summary of Features:

- LS26VNS (N-Channel Single)

- RDS(on) 14-38 Ω

- BVgss 30 Volts

- Available in TO-92 3L, SOT-23 3L, DFN 8L, and Bare Die options

- LS26VPS (P-Channel Single)

- RDS(on) 20-50 Ω

- BVgss 30 Volts

- Available in TO-92 3L, SOT-23 3L, DFN 8L, and Bare Die options

Applications:

- Variable Gain Controls

- Voltage Controlled Oscillators

- Signal Attenuators

- Musical Effects Applications

- Adaptive Analog Filters

- Automatic Gain Control Circuits

- Clock Generators

- Compressors

- Electrometers

- Energy Harvesters

- Expanders

- Hearing Aids

- Light Dimmers

- Modulators

- Mixers

- Artificial Neural Networks

- Programmable Gain Amplifiers

- Phased Arrays

- Phase Lock Loops

- Phase Controlled Dimming Circuits

- Phase Delay and Advance Circuits

- Tunable Filters

- Variable Attenuators

- Voltage Controlled Multivibrators

- Waveform Generators

Pricing and Availability:

- 1,000+ pieces of the LS26VNS and LS26VPS in the TO-92 3L, SOT-23 3L, and DFN 8L packages are priced at $1.23 (USD) each.

- Production quantities are available now with delivery from factory stock to 8 weeks.

This product line is supported by application notes, datasheets, and SPICE models. For further technical resources, please click HERE.

About Linear Systems:

Founded in 1987, Linear Systems is a full-service, privately-held designer and manufacturer of small-signal discrete semiconductors. The Fremont, CA-based company was founded by John H. Hall, co-founder of Intersil and founder of Micro Power Systems.

Linear Systems' product line includes Ultra-Low-Noise N-Channel and P-Channel Dual and Single JFETs, High-Speed Lateral DMOS Switches, Bipolar Transistors, BIFET Amplifiers, Current-Regulating Diodes, Low-Leakage Diodes, MOSFETs, PhotoFETs, and Voltage-Controlled Resistors. Datasheets, application notes, SPICE models, and additional information can be found at www.linearsystems.com.

For more information, contact Linear Systems at (510) 490-9160 or email sales@linearsystems.com.

https://www.linearsystems.com/voltagecontrolledresistors/ls26vps