LMV1015-15 NSC [National Semiconductor], LMV1015-15 Datasheet

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LMV1015-15

Manufacturer Part Number
LMV1015-15
Description
Manufacturer
NSC [National Semiconductor]
Datasheet
© 2005 National Semiconductor Corporation
LMV1015 Analog Series:
Built-in Gain IC’s for High Sensitivity 2-Wire
Microphones
General Description
The LMV1015 is an audio amplifier series for small form
factor electret microphones. This 2-wire portfolio is designed
to replace the JFET amplifier. The LMV1015 series is ideally
suited for applications requiring high signal integrity in the
presence of ambient or RF noise, such as in cellular com-
munications. The LMV1015 audio amplifiers are guaranteed
to operate over a 2.2V to 5.0V supply voltage range with
fixed gains of 15.6 dB and 23.8 dB. The devices offer excel-
lent THD, gain accuracy and temperature stability as com-
pared to a JFET microphone.
The LMV1015 series enables a two-pin electret microphone
solution, which provides direct pin-to-pin compatibility with
the existing older JFET market.
National Semiconductors built-in gain families are offered in
extremely thin space saving 4-bump micro SMD packages
(0.3 mm maximum). The LMV1015XR is designed for 1.0
mm ECM canisters and thicker. These extremely miniature
packages have the Large Dome Bump (LDB) technology.
This micro SMD technology is designed for microphone
PCBs requiring 1 kg adhesion criteria.
Schematic Diagram
DS201289
20128901
Features
(Typical LMV1015-15, 2.2V supply, R
V
n Supply voltage
n Supply current
n Signal to noise ratio (A-weighted)
n Output voltage noise (A-weighted)
n Total harmonic distortion
n Voltage gain
n Temperature range
n Large Dome 4-Bump micro SMD package with improved
Applications
n Cellular phones
n Headsets
n Mobile communications
n Automotive accessories
n PDAs
n Accessory microphone products
Built-In Gain Electret Microphone
IN
adhesion technology.
— LMV1015-15
— LMV1015-25
= 18 mV
PP
, unless otherwise specified)
L
= 2.2 kΩ, C = 2.2 µF,
−40˚C to 85˚C
www.national.com
May 2005
<
−89 dBV
20128902
15.6 dB
23.8 dB
2V - 5V
180 µA
0.09%
60 dB

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LMV1015-15 Summary of contents

Page 1

... ECM canisters and thicker. These extremely miniature packages have the Large Dome Bump (LDB) technology. This micro SMD technology is designed for microphone PCBs requiring 1 kg adhesion criteria. Schematic Diagram © 2005 National Semiconductor Corporation Features (Typical LMV1015-15, 2.2V supply unless otherwise specified Supply voltage ...

Page 2

... A-Weighted kHz and LMV1015-15 < THD+N 1% LMV1015- GND LMV1015-15 IN LMV1015- 50Ω SOURCE R = 50Ω SOURCE A-Weighted LMV1015-15 LMV1015- kHz, LMV1015- LMV1015- kHz, LMV1015- 50Ω SOURCE LMV1015-25 (Note 3) = 25˚ 5V Conditions V = GND ...

Page 3

... LMV1015-15 < THD+N 1% LMV1015- GND LMV1015-15 IN LMV1015- 50Ω SOURCE R = 50Ω SOURCE A-Weighted LMV1015-15 LMV1015- kHz, LMV1015- LMV1015- kHz, LMV1015- 50Ω SOURCE LMV1015-25 , θ and T . The maximum allowable power dissipation at any ambient temperature is J(MAX 2.2 kΩ and C = 2.2 µF. ...

Page 4

... SMD (0.3 mm max height) LMV1015XR-25 lead free only LMV1015XRX-25 4-Bump Ultra-Thin LMV1015UR-15 micro SMD LMV1015URX-15 (0.4 mm max height) LMV1015UR-25 lead free only LMV1015URX-25 Note: All packages are supplied with large dome bump technology for 1kg adhesion criteria. www.national.com Large Dome 4-Bump micro SMD ...

Page 5

... Typical Performance Characteristics C = 2.2 µF, single supply 25˚C A Supply Current vs. Supply Voltage (LMV1015-15) Gain and Phase vs. Frequency (LMV1015-15) Total Harmonic Distortion vs. Frequency (LMV1015-15) Unless otherwise specified, V Supply Current vs. Supply Voltage (LMV1015-25) 20128904 Gain and Phase vs. Frequency (LMV1015-25) 20128905 Total Harmonic Distortion vs. Frequency (LMV1015-25) ...

Page 6

... Typical Performance Characteristics C = 2.2 µF, single supply 25˚C (Continued) A Total Harmonic Distortion vs. Input Voltage (LMV1015-15) Output Noise vs. Frequency (LMV1015-15) www.national.com Unless otherwise specified, V Total Harmonic Distortion vs. Input Voltage 20128907 Output Noise vs. Frequency (LMV1015-25) 20128915 6 = 2.2V 2.2 kΩ (LMV1015-25) 20128923 20128916 ...

Page 7

... MEASURING NOISE AND SNR The overall noise of the LMV1015 is measured within the frequency band from kHz using an A-weighted filter. The input of the LMV1015 is connected to ground with capacitor Figure 3. Special precautions in the internal structure of the LMV1015 have been taken to reduce the noise on the output ...

Page 8

... −94 −44 = −68 dBV OUT This is equivalent to 1. Since the LMV1015-15 has a gain of 6 (15.6 dB) over the JFET, the output voltage of the microphone is 6.78 mV implementing the LMV1015-15, the sensitivity of the micro- phone is −28.4 dBV/Pa (−44 + 15.6). LOW FREQUENCY CUT OFF FILTER To reduce noise on the output of the microphone a low frequency cut off filter has been implemented ...

Page 9

Application Section (Continued) FIGURE 6. RF Noise Reduction 9 20128908 www.national.com ...

Page 10

Physical Dimensions NOTE: UNLESS OTHERWISE SPECIFIED. 1. FOR SOLDER BUMP COMPOSITION, SEE "SOLDER INFORMATION" IN THE PACKAGING SECTION OF THE NATIONAL SEMICONDUCTOR WEB PAGE (www.national.com). 2. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. 3. PIN A1 IS ESTABLISHED BY LOWER LEFT ...

Page 11

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information ...

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