LMV1089RL

Audio Amplifiers Overview

The LMV1089RL is a dual-channel far-field microphone preamplifier manufactured by Texas Instruments, which acquired National Semiconductor. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical operating current of 1.1 mA. The device features a total harmonic distortion plus noise of 0.1%, an input bias current of 1.2 uA, and a common-mode rejection ratio of 62 dB. It supports a maximum input resistance of 142 kOhms and drives a 10 kOhms audio load impedance. The component is housed in a DSBGA-36 package and functions within a temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Dual-channel architecture designed for far-field noise suppression applications
• Integrated auto-calibration capability for enhanced performance stability
• Class-AB output stage configuration for efficient signal amplification

Audio Amplifiers Applications

• Far-field microphone array systems
• Voice recognition devices requiring noise suppression
• Conference phone preamplification stages

Audio Amplifiers Procurement Notes

Verify the manufacturer status carefully as this component originates from National Semiconductor, now part of Texas Instruments. Confirm the specific suffix 'RL' corresponds to the DSBGA-36 reel packaging variant. Check for end-of-life or not recommended for new design (NRND) status updates, as availability may be limited compared to active TI inventory. Ensure compatibility with existing ECAD models if replacing older designs.

Audio Amplifiers Selection Notes

Select this component when a dual-channel solution with integrated far-field noise reduction is required. The low power consumption of 1.1 mA makes it suitable for battery-operated portable devices. The DSBGA-36 package offers a compact footprint for space-constrained PCB layouts. Ensure the system supply voltage remains within the 2.7 V to 5.5 V operational range to maintain specified CMRR and THD performance levels.

Audio Amplifiers Part Context

This part belongs to the LMV1089 series of microphone preamplifiers. While originally branded under National Semiconductor, production and datasheets are managed by Texas Instruments following their acquisition. The RL suffix specifically denotes the tape and reel packaging format using the DSBGA-36 surface-mount package, distinguishing it from tray-packaged variants like the VY version.

Audio Amplifiers Replacement Considerations

The LMV1089VY/NOPB serves as a pin-compatible alternative offering identical electrical specifications but utilizes an LQFP-32 package instead of DSBGA-36. Verify that the target PCB footprint can accommodate the larger LQFP-32 dimensions before substituting.