LMV1089RLEVAL National Semiconductor, LMV1089RLEVAL Datasheet - Page 17

• Manufacturer Part Number: LMV1089RLEVAL
• Description: BOARD EVALUATION LMV1089
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMV1089RLEVAL

• Main Purpose: Audio, Microphone Amp
• Embedded: No
• Utilized Ic / Part: LMV1089
• Primary Attributes: Dual Input, Single Output
• Secondary Attributes: Graphical User Interface, I²C Interface
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Description of Headers and Connectors of the LMV1089 Demoboard
The LMV1089 demoboard provides many headers and con-
nectors for connecting test equipment and controlling the
settings of the part. The function that is controlled by the
Connector and Header Functions for the LMV1089RL Demoboard
Designator
J13, J14
J23, J24
J8, J10
CON2
CON3
J3, J4
J6, J6
TP1
BT1
JP1
J11
J12
J15
J16
J17
J18
J19
J20
J21
J22
J25
J26
J1
J2
J7
J9
(M1_UNP) Microphone 1 Unprocessed signal output
(M2_UNP) Microphone 2 Unprocessed signal output
(GA0, GA1) Pre-Amplifier default gain setting
(GB0, GB1) Post-Amplifier default gain setting
(TM) Auxiliary control
(LPF+,LPF-) Low pass filter selection
(MIC1) Microphone input jack
(SELECT) Connection for input of electrical test signals
at pin 4 and 5
Activation of Microphone1 input connectors J12 / J9
MIC panel / For connecting a Microphone panel with 2
microphones
(OUT-) Output signal of the processed audio
(MIC2) Microphone input jack
(SELECT) Connection for input of electrical test signals
at pin 4 and 5
Activation of Microphone2 input connectors J12 / J9
(I2Cadd) I
(PE) Enable Programming of the EEPROM
(CAL) Start calibration of the two microphones
(I2C) I2C interface connector
(I
(I
(OUT+) Output signal of the processed audio
(EN) Enable Chip
(V
(V
(GND) Ext V
Ground connection for probes
(TP5) Test signal
3 V Lithium battery holder
DD
2
CV
DD
DD
) Supply current measurement
) Ext V
SEL)
DD
) Selection of I
2
C address selection
DD
DD
Plus
Minus
Function or Use
2
CV
DD
17
jumpers on the LMV1089 demo board is also indicated on the
PCB in silk screen.
See Table 1
See Table 2
Pin 1+2 to connect an external LPF capacitor. Pin 2+3
select the on board LPF capacitor C5, C14 (a minimum
of 1nF is always mounted on the board)
Stereo 3.5 mm jack with ground connection. tip = Mic+ 1st
ring = Mic-
Pin 3+4 differential input with ground at Pin 5+6
Header between Pin 1+3 and 2+4
Mic1 between Pin 1+2 Mic2 between Pin 7+8 Ground is
at Pin 3+5
Differential output (-)
1 = GND
2 = OUT
Stereo 3.5 mm jack with ground connection. tip =Mic+ 1st
ring = Mic-
Pin 3+4 differential input with ground at Pin 5+6
Header between Pin 1+3 and 2+4
Open: (0CE Hex) Closed (0CC Hex)
Closed = Program Enable
Closed = Program Enable
Normally shorted by jumper, replace jumper by DMM for
supply current measurement
Differential output (+)
1 = GND
2 = OUT
Closed = Chip Enable
Selection of V
2–3 = Ext V
1–2 = Battery
Power supply connection
Not for Customer Use
CR1220 size
DD
DD
source
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