LMV1032-06/LMV1032-15/LMV1032-25
Amplifiers for 3 Wire Analog Electret Microphones
LMV1032-06/LMV1032-15/LMV1032-25 Amplifiers for 3 Wire Analog Electret Microphones
February 2004
General Description
The LMV1032 is an audio amplifier series for small form
factor electret microphones. It is designed to replace the
JFET preamp currently being used. The LMV1032 series is
ideal for extended battery life applications, such as a bluetooth communication link. The addition of a third pin in
electret microphones that incorporate the LMV1032 allows
for a dramatic reduction in supply current as compared to the
JFET equipped electret microphone. Microphone supply current is thus reduced to 60 µA, assuring longer battery life.
The LMV1032 series is guaranteed for supply voltages from
1.7V to 5V, and has fixed voltage gains of 6 dB, 15 dB and 25
dB.
The LMV1032 series offers low output impedance over the
voice bandwidth, excellent power supply rejection (PSRR),
and stability over temperature.
The devices are offered in space saving 4-bump ultra thin
micro SMD (TM) lead free package and are thus ideally
suited for the form factor of miniature electret microphone
packages.
Block Diagram
Features
(Typical LMV1032-06, 1.7V Supply; Unless Otherwise
Noted)
n Output voltage noise (A-weighted) −97 dBV
n Low supply current 60 µA
n Supply voltage 1.7V to 5V
n PSRR 84 dB
n Signal to noise ratio 58 dB
n Input capacitance 2 pF
n Input impedance
n Output impedance
n Max input signal 300 mV
n Temperature range −40˚C to 85˚C
n Offered in 1.13 x 1.13 x 0.4mm Ultra Thin micro SMD
lead free (NOPB) package
>
100 MΩ
<
200Ω
PP
Applications
n Mobile communications - Bluetooth
n Automotive accessories
n Cellular phones
n PDAs
n Accessory microphone products
Electret Microphone
20084202
20084201
© 2004 National Semiconductor Corporation DS200842 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range −65˚C to 150˚C
Junction Temperature (Note 6) 150˚C max
Mounting Temperature
Infrared or Convection (20 sec.) 235˚C
ESD Tolerance (Note 2)
Human Body Model 2500V
Operating Ratings (Note 1)
Machine Model 250V
Supply Voltage
- GND 5.5V
V
DD
Supply Voltage 1.7V to 5V
Temperature Range −40˚C to +85˚C
1.7V and 5V Electrical Characteristics (Note 3)
Unless otherwise specified, all limits guaranteed for TJ= 25˚C and VDD= 1.7V and 5V. Boldface limits apply at the temperature extremes.
LMV1032-06/LMV1032-15/LMV1032-25
Symbol Parameter Conditions
I
DD
SNR Signal to Noise Ratio VDD= 1.7V
PSRR Power Supply Rejection Ratio 1.7V
V
IN
f
LOW
f
HIGH
e
n
V
OUT
R
O
I
O
Supply Current VIN= GND 60 85
=18mV
V
IN
f=1kHz
=5V
V
DD
=18mV
V
IN
f=1kHz
<
V
DD
Max Input Signal f = 1kHz and THD+N
<
1%
Lower −3 dB Roll Off Frequency R
Upper −3 dB Roll Off Frequency R
SOURCE
V
IN
SOURCE
V
IN
=50Ω
=18mV
=50Ω
=18mV
Output Noise A-Weighted LMV1032-06 −97
Output Voltage VIN= GND LMV1032-06 100 300 500
Output Impedance f=1kHz
Output Current VDD= 1.7V, V
VDD= 1.7V, V
= 5V, V
V
DD
V
DD
= 5V, V
OUT
OUT
LMV1032-06 58
PP
LMV1032-15 61
LMV1032-25 61
LMV1032-06 59
PP
LMV1036-15 61
LMV1032-25 62
<
5V LMV1032-06 65
LMV1032-15 60
LMV1032-25 55
LMV1032-06 300
LMV1032-15 170
LMV1032-25 60
PP
LMV1032-06 120
PP
LMV1032-25 21
LMV1032-25 −80
LMV1032-25 300 600 1000
= 1.7V, Sinking 0.9
OUT
= 0V, Sourcing 0.3
OUT
= 1.7V, Sinking 0.9
= 0V, Sourcing 0.4
Min
(Note 4)
60
55
50
0.5
0.2
0.5
0.1
Typ
(Note 5)
Max
(Note 4) Units
100
75
70
65
70
<
200 Ω
2.3
0.64
2.4
1.46
mV
kHzLMV1032-15 75
dBVLMV1032-15 −89
mVLMV1032-15 250 500 750
mA
µA
dB
dB
PP
Hz
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1.7V and 5V Electrical Characteristics (Note 3) (Continued)
Unless otherwise specified, all limits guaranteed for TJ= 25˚C and VDD= 1.7V and 5V. Boldface limits apply at the temperature extremes.
Min
Symbol Parameter Conditions
THD Total Harmonic Distortion f=1kHz
=18mV
V
IN
PP
LMV1032-06 0.11
(Note 4)
LMV1032-25 0.35
C
IN
Z
IN
A
V
Input Capacitance 2pF
Input Impedance
Gain f=1kHz
=18mV
V
IN
PP
LMV1032-06 5.5
4.5
LMV1032-15 14.8
14
LMV1032-25 24.8
24
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human Body Model (HBM) is 1.5 kΩ in series with 100 pF.
Note 3: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of
the device such that T
Note 4: All limits are guaranteed by design or statistical analysis.
Note 5: Typical values represent the most likely parametric norm.
Note 6: The maximum power dissipation is a function of T
(T
J(MAX)-TA
)/θJA. All numbers apply for packages soldered directly into a PC board.
. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where T
J=TA
, θJAand TA. The maximum allowable power dissipation at any ambient temperature is PD=
J(MAX)
Typ
(Note 5)
>
100 MΩ
Max
(Note 4) Units
6.2 6.7
7.7
15.4 16
17
25.5 26.2
27
LMV1032-06/LMV1032-15/LMV1032-25
%LMV1032-15 0.13
dB
>
TA.
J
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Connection Diagram
4-Bump Ultra Thin micro SMD
LMV1032-06/LMV1032-15/LMV1032-25
Note: - Pin numbers are referenced to package marking text orientation.
- The actual physical placement of the package marking will vary slightly from part to part. The package will designate the date code and will vary considerably.
Package marking does not correlate to device type in any way.
Ordering Information
Package Part Number Package Marking Transport Media NSC Drawing
LMV1032UP-06
LMV1032UPX-06 3k Units Tape and Reel
4-Bump Ultra Thin
micro SMD lead free
Note: The LMV1032 series is offered only with lead free (NOPB) solder bumps.
The LMV1032 series replaces the LMV1014.
LMV1032UP-15
LMV1032UPX-15 3k Units Tape and Reel
LMV1032UP-25
LMV1032UPX-25 3k Units Tape and Reel
Top View
Date Code
Date Code
Date Code
20084203
250 Units Tape and Reel
250 Units Tape and Reel
250 Units Tape and Reel
UPA04QQA
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