Features Noise reduction without DSP-type artifacts. Adapting AGC (Automatic Gain Control) on ambient noise level & downlink signal strength Downlink adjustable noise-reducing high pass filter Separate Uplink & Downlink Enable Functions No added process delays Low power consumption Shutdown function Maximum AGC Limiter Differential inputs & outputs for noise immunity Earpiece amplifier Available in a 25-bump micro SMD Description The LMV1099 is an uplink and downlink voice intelligibility enhancing analog IC, ideally suited for mobile handsets. Uplink voice intelligibility is improved by rejecting far-field noise through a unique two-microphone solution. Downlink voice intelligibility is improved by enhancing the SNR (Signal-to-Noise Ratio) between the downlink voice and the ambient noise environment at the user’s earpiece. The LMV1099 preserves uplink near-field voice signals within close range of the microphones while rejecting far-field acoustic noise greater than 0.5m from the microphones. The LMV1099 also enhances downlink voice intelligibility by improving near-field SNR based on the user’s environment. The analog circuitry adapts dynamically to both the user’s ambient noise environment as well as the downlink signal amplitude to ensure optimum SNRI (signal-to-noise ratio improvement). The downlink path also provides uplink noise attenuation through an adjustable high pass filter before the SNR enhanced downlink voice reaches the user’s earpiece. Unlike digital-based noise reduction solutions, the all-analog low power consuming LMV1099 increases both uplink and downlink voice intelligibility without DSP-type artifacts, distortions or processing delays. Key Specification ■  Uplink Far Field Noise Suppression   (Electrical FFNSE at f = 1kHz) 33dB (typ) ■  Near-Field SNR Enhancement 6 to 18dB (typ) ■  Downlink SNRIE 16dB (typ) ■  Supply voltage range 2.7V to 5.5V ■  Supply current (VDD = 3.6V) 3.8mA (typ) ■  Shutdown current 0.06μA (typ) ■  Uplink PSRR (f = 217Hz) 106dB (typ) ■  Downlink SNR (A-weighted) 102dB (typ) ■  Downlink THD+N 0.03% (typ) ■  Earpiece output power     (RL = 32Ω) 83mW (typ) Applications Mobile Handsets Mobile and handheld two-way radios Bluetooth and other power headsets

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Parameters Values Function Beamforming Uplink Yes Downlink Yes Special Features Uplink Noise Suppression + Downlink Signal Enhancer Mono/Stereo Mono Auto Calibration No Output Type Differential Shut down No FFNRI (electrical) 34 dB SNRI (electrical) 16 dB Supply Current 3.7 mA THD 0.1 % SNR 65 dB PSRR 106 dB Supply Min 2.7 Volt Supply Max 5.5 Volt User Supply 3.6 Volt Control Scheme I2C Temperature Min -40 deg C Temperature Max 85 deg C PowerWise Yes

Datasheets

Title		Size	Date	Other Language
	LMV1099 Uplink Far Field Noise Suppression & Downlink SNR Enhancing Microphone Amplifier with Earpiece Driver	791 Kbytes	31-Mar-11

Other Technical Documents

Title		Type	Date
	LMV1099 Quick Start Guide	User Guide	2011-08-15

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMV1099TL/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 399 DIGI-KEY Worldwide 444 FARNELL Europe and Asia 235 NEWARK Americas 235	$0.99 each at 1K+ pcs	reel of 250

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMV1099.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMV1099 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMV1099TLEVAL	LMV1099 Evaluation Board	Preliminary	Distributor Region Qty	CALL	N/A
Description: The LMV1099 is designed for portable handheld applications such as cellular phones. The LMV1099 improves voice intelligibility in handsets by providing up to 34dB of electrical far field noise suppression to the uplink signal path and 16dB of electrical signal to noise ratio improvement on the downlink signal path. The device comprises a Noise Suppression microphone amplifier, a class AB earpiece driver with AGC and I2C modes select. The LMV1099TLEVAL is an evaluation board designed to ease evaluation and effort during the development of a circuit using the LMV1099TL. It is an easy-to-use stand-alone board that requires power and GND, an I2C control signal, an input signal and output load. Software for the product can be downloaded from http://audio.national.com Features: Noise cancellation for uplink and downlink without DSP type artifacts, distortions or delays Adapting AGC on ambient noise level & downlink signal strength for earpiece Downlink adjustable noise-reducing high pass filter No convergence time I2C Volume and Mode Control Tiny micro SMD Applications: Personal Mobile Devices Mobile phones Contents: A Fully Assembled LMV1099TL Evaluation Board USB MINI Board MINI USB Cable CELL PHONE (DUMMY) Resources: Eval Board Digital Control Software

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMV1099TL/NOPB	N/A	MICRO SMD	25	1	260	Detail	N/A	N/A	XYTT I ZA5

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMV1099.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMV1099 is located at RoHS Status.

Design Tools

Title	Size	Date
LMV1099TL Evaluation Board Quick Start Guide
LMV1099 Software

CAD Symbols and Models N/A

Models N/A