LMV1032-06/LMV1032-15/LMV1032-25
Amplifiers for 3 Wire Analog Electret Microphones
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 blue-
tooth 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 cur-
rent is thus reduced to 60 A, 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.
Features
(Typical LMV1032-06, 1.7V Supply; Unless Otherwise
Noted)
n
Output voltage noise (A-weighted)
-97 dBV
n
Low supply current
60 A
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
>
100 M
n
Output impedance
<
200
n
Max input signal
300 mV
PP
n
Temperature range
-40C to 85C
n
Offered in 1.13 x 1.13 x 0.4mm Ultra Thin micro SMD
lead free (NOPB) package
Applications
n
Mobile communications - Bluetooth
n
Automotive accessories
n
Cellular phones
n
PDAs
n
Accessory microphone products
Block Diagram
20084201
Electret Microphone
20084202
February 2004
LMV1032-06/LMV1032-15/LMV1032-25
Amplifiers
for
3
W
ire
Analog
Electret
Microphones
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.
ESD Tolerance (Note 2)
Human Body Model
2500V
Machine Model
250V
Supply Voltage
V
DD
- GND
5.5V
Storage Temperature Range
-65C to 150C
Junction Temperature (Note 6)
150C max
Mounting Temperature
Infrared or Convection (20 sec.)
235C
Operating Ratings
(Note 1)
Supply Voltage
1.7V to 5V
Temperature Range
-40C to +85C
1.7V and 5V Electrical Characteristics
(Note 3)
Unless otherwise specified, all limits guaranteed for T
J
= 25C and V
DD
= 1.7V and 5V. Boldface limits apply at the tempera-
ture extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
I
DD
Supply Current
V
IN
= GND
60
85
100
A
SNR
Signal to Noise Ratio
V
DD
= 1.7V
V
IN
= 18 mV
PP
f = 1 kHz
LMV1032-06
58
dB
LMV1032-15
61
LMV1032-25
61
V
DD
= 5V
V
IN
= 18 mV
PP
f = 1 kHz
LMV1032-06
59
LMV1036-15
61
LMV1032-25
62
PSRR
Power Supply Rejection Ratio
1.7V
<
V
DD
<
5V
LMV1032-06
65
60
75
dB
LMV1032-15
60
55
70
LMV1032-25
55
50
65
V
IN
Max Input Signal
f = 1kHz and THD+N
<
1%
LMV1032-06
300
mV
PP
LMV1032-15
170
LMV1032-25
60
f
LOW
Lower -3 dB Roll Off Frequency
R
SOURCE
= 50
V
IN
= 18 mV
PP
70
Hz
f
HIGH
Upper -3 dB Roll Off Frequency
R
SOURCE
= 50
V
IN
= 18 mV
PP
LMV1032-06
120
kHz
LMV1032-15
75
LMV1032-25
21
e
n
Output Noise
A-Weighted
LMV1032-06
-97
dBV
LMV1032-15
-89
LMV1032-25
-80
V
OUT
Output Voltage
V
IN
= GND
LMV1032-06
100
300
500
mV
LMV1032-15
250
500
750
LMV1032-25
300
600
1000
R
O
Output Impedance
f = 1 kHz
<
200
I
O
Output Current
V
DD
= 1.7V, V
OUT
= 1.7V, Sinking
0.9
0.5
2.3
mA
V
DD
= 1.7V, V
OUT
= 0V, Sourcing
0.3
0.2
0.64
V
DD
= 5V, V
OUT
= 1.7V, Sinking
0.9
0.5
2.4
V
DD
= 5V, V
OUT
= 0V, Sourcing
0.4
0.1
1.46
LMV1032-06/LMV1032-15/LMV1032-25
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2
1.7V and 5V Electrical Characteristics
(Note 3) (Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C and V
DD
= 1.7V and 5V. Boldface limits apply at the tempera-
ture extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
THD
Total Harmonic Distortion
f = 1 kHz
V
IN
= 18 mV
PP
LMV1032-06
0.11
%
LMV1032-15
0.13
LMV1032-25
0.35
C
IN
Input Capacitance
2
pF
Z
IN
Input Impedance
>
100
M
A
V
Gain
f = 1 kHz
V
IN
= 18 mV
PP
LMV1032-06
5.5
4.5
6.2
6.7
7.7
dB
LMV1032-15
14.8
14
15.4
16
17
LMV1032-25
24.8
24
25.5
26.2
27
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 k
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
J
= T
A
. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where T
J
>
T
A
.
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
J(MAX)
,
JA
and T
A
. The maximum allowable power dissipation at any ambient temperature is P
D
=
(T
J(MAX)
- T
A
)/
JA
. All numbers apply for packages soldered directly into a PC board.
LMV1032-06/LMV1032-15/LMV1032-25
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3
Connection Diagram
4-Bump Ultra Thin micro SMD
20084203
Top View
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
4-Bump Ultra Thin
micro SMD lead free
LMV1032UP-06
Date Code
250 Units Tape and Reel
UPA04QQA
LMV1032UPX-06
3k Units Tape and Reel
LMV1032UP-15
Date Code
250 Units Tape and Reel
LMV1032UPX-15
3k Units Tape and Reel
LMV1032UP-25
Date Code
250 Units Tape and Reel
LMV1032UPX-25
3k Units Tape and Reel
Note: The LMV1032 series is offered only with lead free (NOPB) solder bumps.
The LMV1032 series replaces the LMV1014.
LMV1032-06/LMV1032-15/LMV1032-25
www.national.com
4
Typical Performance Characteristics
Unless otherwise specified, V
S
= 1.7V, single supply, T
A
=
25C
Supply Current vs. Supply Voltage (LMV1032-06)
Supply Current vs. Supply Voltage (LMV1032-15)
20084204
20084213
Supply Current vs. Supply Voltage (LMV1032-25)
Closed Loop Gain and Phase vs. Frequency
(LMV1032-06)
20084214
20084205
Closed Loop Gain and Phase vs. Frequency
(LMV1032-15)
Closed Loop Gain and Phase vs. Frequency
(LMV1032-25)
20084215
20084216
LMV1032-06/LMV1032-15/LMV1032-25
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5
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