LT1490ACMS8 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LT1490ACMS8
Linear Technology
'LT1490ACMS8' PDF : 18 Pages View PDF
LT1490A/LT1491A
TYPICAL APPLICATION
Ring-Tone Generator
R2
47k
R3
10k
C2
0.47μF
3+
R1 1/4 LT1491A
33k 2 –
D1
1 1N4148
C1
R4
1μF 1.6M
CADENCE OSCILLATOR
R5
100k
R6
10k
C3
0.047μF
5+
R9
R11
7 300k
1/4 LT1491A
10k 10 +
6–
R7
16k
8
1/4 LT1491A
C4
9–
0.068μF
R8
620k
20Hz OSCILLATOR
R12
R10 SMOOTHING FILTER 10k
620k
C5
R13
0.01μF
130k
60V
Q1
IRF628
R16
100k
Q3
2N3904
Z1
R17
15V
620Ω
100k
13 –
4
14
1/4 LT1491A
12 +
R14
10k
11
R24
420
C7
47μF
R18
100Ω
R23
4.7k
R15
R25
47k
4.7k
R26
2k
OPTO1*
Q5
2N3904
*LED OF OPTO1 ILLUMINATES WHEN THE PHONE IS OFF THE HOOK
SEE DESIGN NOTE DN134 FOR A DISCUSSION OF THE CIRCUIT
Q2
IRF9620
POWER AMPLIFIER
–180V
Z2
15V
R20
100k
R19
620Ω
UP TO
LOAD TEN
PHONES
Q4
2N3906
R21
150Ω
C6
0.033μF
1490A TA03
RELATED PARTS
PART NUMBER
LT1366/LT1367
LT1636
LT1638/LT1639
LT1782
LT1783
DESCRIPTION
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
Single Over-The-Top Micropower Rail-to-Rail Input and Output
Op Amp
Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and
Output Op Amp
1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and
Output Op Amp
COMMENTS
475μV VOS(MAX), 500V/mV AVOL(MIN), 400kHz GBW
55μA Supply Current, VCM Extends 44V Above VEE,
Independent of VCC, MSOP Package, Shutdown Function
0.4V/μs Slew Rate, 230μA Supply Current per Amplifier
SOT-23, 800μV VOS(MAX), IS = 55μA (Max),
Gain-Bandwidth = 200kHz, Shutdown Pin
SOT-23, 800μV VOS(MAX), IS = 300μA (Max),
Gain-Bandwidth = 1.2MHz, Shutdown Pin
18 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
14901afd
LT 1211 REV D • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2011
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