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LMV1012 Analog Series:
Pre-Amplified IC's for High Gain 2-Wire Microphones
General Description
The LMV1012 is an audio amplifier series for small form
factor electret microphones. This 2-wire portfolio is designed
to replace the JFET amplifier currently being used. The
LMV1012 series is ideally suited for applications requiring
high signal integrity in the presence of ambient or RF noise,
such as in cellular communications. The LMV1012 audio
amplifiers are guaranteed to operate over a 2.2V to 5.0V
supply voltage range with fixed gains of 7.8 dB, 15.6 dB,
20.9 dB, and 23.8 dB. The devices offer excellent THD, gain
accuracy and temperature stability as compared to a JFET
microphone.
The LMV1012 series enables a two-pin electret microphone
solution, which provides direct pin-to-pin compatibility with
the existing JFET market.
The devices are offered in extremely thin space saving
4-bump micro SMD packages. The LMV1012XP is designed
for 1.0 mm canisters and thicker ECM canisters. These
extremely miniature packages are designed for electret con-
denser microphones (ECM) form factor.
Features
(Typical LMV1012-15, 2.2V supply, R
L
= 2.2 k
, C = 2.2 F,
V
IN
= 18 mV
PP
, unless otherwise specified)
n
Supply voltage
2V - 5V
n
Supply current
<
180 A
n
Signal to noise ratio (A-weighted)
60 dB
n
Output voltage noise (A-weighted)
-89 dBV
n
Total harmonic distortion
0.09%
n
Voltage gain
-- LMV1012-07
7.8 dB
-- LMV1012-15
15.6 dB
-- LMV1012-20
20.9 dB
-- LMV1012-25
23.8 dB
n
Temperature range
-40C to 85C
n
Offered in 4-bump micro SMD packages
Applications
n
Cellular phones
n
Headsets
n
Mobile communications
n
Automotive accessories
n
PDAs
n
Accessory microphone products
Schematic Diagram
20058701
Built-In Gain Electret Microphone
20058702
August 2004
LMV1012
Analog
Series
Pre-Amplified
IC'
s
for
High
Gain
2-W
ire
Microphones
2004 National Semiconductor Corporation
DS200587
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
2V to 5V
Temperature Range
-40C to 85C
2.2V Electrical Characteristics
(Note 3)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
DD
= 2.2V, V
IN
= 18 mV, R
L
= 2.2 k
and C = 2.2 F.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
I
DD
Supply Current
V
IN
= GND
LMV1012-07
139
250
300
A
LMV1012-15
180
300
325
LMV1012-20
160
250
300
LMV1012-25
141
250
300
SNR
Signal to Noise Ratio
f = 1 kHz, V
IN
= 18
mV, A-Weighted
LMV1012-07
59
dB
LMV1012-15
60
LMV1012-20
61
LMV1012-25
61
V
IN
Max Input Signal
f = 1 kHz and
THD+N
<
1%
LMV1012-07
170
mV
PP
LMV1012-15
100
LMV1012-20
50
LMV1012-25
28
V
OUT
Output Voltage
V
IN
= GND
LMV1012-07
1.65
1.54
1.90
2.03
2.09
V
LMV1012-15
1.54
1.48
1.81
1.94
2.00
LMV1012-20
1.65
1.55
1.85
2.03
2.13
LMV1012-25
1.65
1.49
1.90
2.02
2.18
f
LOW
Lower -3dB Roll Off Frequency
R
SOURCE
= 50
65
Hz
f
HIGH
Upper -3dB Roll Off Frequency
R
SOURCE
= 50
95
kHz
e
n
Output Noise
A-Weighted
LMV1012-07
-96
dBV
LMV1012-15
-89
LMV1012-20
-84
LMV1012-25
-82
THD
Total Harmonic Distortion
f = 1 kHz,
V
IN
= 18 mV
LMV1012-07
0.10
%
LMV1012-15
0.09
LMV1012-20
0.12
LMV1012-25
0.15
C
IN
Input Capacitance
2
pF
Z
IN
Input Impedance
>
1000
G
LMV1012
Analog
Series
www.national.com
2
2.2V Electrical Characteristics
(Note 3) (Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
DD
= 2.2V, V
IN
= 18 mV, R
L
= 2.2 k
and C = 2.2 F.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
A
V
Gain
f = 1 kHz,
R
SOURCE
= 50
LMV1012-07
6.4
5.5
7.8
9.5
10.0
dB
LMV1012-15
14.0
13.1
15.6
16.9
17.5
LMV1012-20
19.5
17.4
20.9
22.0
23.3
LMV1012-25
22.5
21.4
23.8
25.0
25.7
5V Electrical Characteristics
(Note 3)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
DD
= 5V, V
IN
= 18 mV, R
L
= 2.2 k
and C = 2.2 F.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
I
DD
Supply Current
V
IN
= GND
LMV1012-07
158
250
300
A
LMV1012-15
200
300
325
LMV1012-20
188
260
310
LMV1012-25
160
250
300
SNR
Signal to Noise Ratio
f = 1 kHz, V
IN
= 18
mV, A-Weighted
LMV1012-07
59
dB
LMV1012-15
60
LMV1012-20
61
LMV1012-25
61
V
IN
Max Input Signal
f = 1 kHz and
THD+N
<
1%
LMV1012-07
170
mV
PP
LMV1012-15
100
LMV1012-20
55
LMV1012-25
28
V
OUT
Output Voltage
V
IN
= GND
LMV1012-07
4.45
4.38
4.65
4.80
4.85
V
LMV1012-15
4.34
4.28
4.56
4.74
4.80
LMV1012-20
4.40
4.30
4.58
4.75
4.85
LMV1012-25
4.45
4.39
4.65
4.83
4.86
f
LOW
Lower -3dB Roll Off Frequency
R
SOURCE
= 50
67
Hz
f
HIGH
Upper -3dB Roll Off Frequency
R
SOURCE
= 50
150
kHz
e
n
Output Noise
A-Weighted
LMV1012-07
-96
dBV
LMV1012-15
-89
LMV1012-20
-84
LMV1012-25
-82
THD
Total Harmonic Distortion
f = 1 kHz,
V
IN
= 18 mV
LMV1012-07
0.12
%
LMV1012-15
0.13
LMV1012-20
0.18
LMV1012-25
0.21
LMV1012
Analog
Series
www.national.com
3
5V Electrical Characteristics
(Note 3) (Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
DD
= 5V, V
IN
= 18 mV, R
L
= 2.2 k
and C = 2.2 F.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
C
IN
Input Capacitance
2
pF
Z
IN
Input Impedance
>
1000
G
A
V
Gain
f = 1 kHz,
R
SOURCE
= 50
LMV1012-07
6.4
5.5
8.1
9.5
10.7
dB
LMV1012-15
14.0
13.1
15.6
16.9
17.5
LMV1012-20
19.2
17.0
21.1
22.3
23.5
LMV1012-25
22.5
21.2
23.9
25.0
25.8
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.
LMV1012
Analog
Series
www.national.com
4
Connection Diagram
4-Bump micro SMD
20058703
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 Extreme Thin
micro SMD
(0.3 mm max height)
lead free only
LMV1012XP-15
Date Code
250 Units Tape and Reel
XPA04HLA
LMV1012XPX-15
3k Units Tape and Reel
LMV1012XP-25
250 Units Tape and Reel
LMV1012XPX-25
3k Units Tape and Reel
4-Bump Ultra-Thin
micro SMD
(0.4 mm max height)
lead free only
LMV1012UP-07
Date Code
250 Units Tape and Reel
UPA04GKA
LMV1012UPX-07
3k Units Tape and Reel
LMV1012UP-15
250 Units Tape and Reel
LMV1012UPX-15
3k Units Tape and Reel
LMV1012UP-20
250 Units Tape and Reel
LMV1012UPX-20
3k Units Tape and Reel
LMV1012UP-25
250 Units Tape and Reel
LMV1012UPX-25
3k Units Tape and Reel
4-Bump Thin
micro SMD
(0.5 mm max height)
LMV1012TP-07
Date Code
250 Units Tape and Reel
TPA04GKA
LMV1012TPX-07
3k Units Tape and Reel
LMV1012TP-15
250 Units Tape and Reel
LMV1012TPX-15
3k Units Tape and Reel
LMV1012TP-25
250 Units Tape and Reel
LMV1012TPX-25
3k Units Tape and Reel
LMV1012
Analog
Series
www.national.com
5<
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