LS188 ,MICROPHONE AMPLIFIERC'i'T SGS-11'IOM ON
" memem il1Sl!lleiflll! LS188
MICROPHONE AMPLIFIER
I VERY FEW EXTERNAL C ..
LS188 ,MICROPHONE AMPLIFIERABSOLUTE MAXIMUM RATINGS
Symbol , Parameter Value Unit
VM I Microphone Voltage (3ms duration) 2 ..
LS188 ,MICROPHONE AMPLIFIERapplications. The
circuit is assembled in a 8-pin Dual in Line Package.
The LS188 consists of a d ..
LS204 ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSapplications (active filter, etc).ORDER CODE +1 8 VOutput 1CCPackageInverting input 1 2- 7 Ou ..
LS204CD ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSapplications (active filter, etc).ORDER CODE +1 8 VOutput 1CCPackageInverting input 1 2- 7 Ou ..
LS204CD ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSLS204 HIGH PERFORMANCEDUAL OPERATIONAL AMPLIFIER ■ LOW POWER CONSUMPTION■ SHORT CIRCUIT PRO ..
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LS188
MICROPHONE AMPLIFIER
felF SE es'iriizil(i5)lN (O
'sSilf' MH©§©E£E©FR§MUC®N$ LS188
MICROPHONE AMPLIFIER
a VERY FEW EXTERNAL COMPONENTS internal reference and a current modulator stage
n BUILT IN PARTIAL BRIDGE enabling the device to send the amplifier speech to
n HIGH IMMUNITY AGAINST EMI the line.
a ACCURATE GAIN CONTROL
a NO CAPACITOR REQUIRED
u WIDE OPERATING VOLTAGE AND CURRENT
n PROGRAMMABLE DC CHARACTERISTICS MINlDlP
DESCRIPTION
The LS188 is a monolithic microphone amplifier
designed to be used with several kinds of transdu-
cers. It can replace the carbon microphone in tele-
phones and may also be used in cassette recorder,
walky talkies, or infrared receiver applications. The
circuit is assembled in a 8-pin Dual in Line Package.
The LS188 consists of a differential input amplifier,
ORDER CODE : LS188CB
PIN CONNECTION (top view)
t V DC
lt CHARACTERISTICS
LINE .
2 7 (" GROUND
, 3 6 ] GAIN
MIKE INPUY PROGRAMMAHON
S-6204
November 1988 1/3
BLOCK DIAGRAM
S-6205 f Ts" 7 6
TEST CIRCUIT
125 n >5H -1000 n.
3 1 - a
m. LS188 Ct Wisov
4 s ti 7 a 2 af/r
f l 1000 213 2:213
s - s 206tl - -
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VM Microphone Voltage (3ms duration) 20 V
OM Microphone Current 150 mA
Ptot Power Dissipation 600 mW
Top Operating Temperature - 30 to 70 °C
THERMAL DATA
Rm i-arntr Thermal Resistance Junction-ambient Max 100 °C/W
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