LT1491 Linear Technology, LT1491 Datasheet - Page 12

• Manufacturer Part Number: LT1491
• Description: Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps
• Manufacturer: Linear Technology

CADENCE OSCILLATOR
LT1490/LT1491
TYPICAL
RELATED PARTS
PART NUMBER
LT1078/LT1079
LTC1152
LT1178/LT1179
LT1366/LT1367
C-Load is a trademark of Linear Technology Corporation.
12
R1
33k
3
2
C1
1 F
+
–
1/4 LT1491
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 [phone]
FAX: [phone] TELEX: 499-3977 www.linear-tech.com
*LED OF OPTO1 ILLUMINATES WHEN THE PHONE IS OFF THE HOOK
1.6M
OFF HOOK DETECTION
R4
APPLICATION
1
DESCRIPTION
Dual/Quad 55 A Max, Single Supply, Precision Op Amps
Rail-to-Rail Input, Rail-to-Rail Output, Zero-Drift Amplifier
Dual/Quad 17 A Max, Single Supply, Precison Op Amps
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
1N4148
0.47 F
R3
10k
47k
R2
D1
C2
R5
100k
5
6
620k
+
–
1/4 LT1491
R8
U
20Hz OSCILLATOR
10k
16k
R6
R7
7
300k
R9
Ring-Tone Generator
R10
620k
0.068 F
R11
10k
C4
SMOOTHING FILTER
10
9
0.01 F
C3
0.047 F
–
+
1/4 LT1491
POWER AMPLIFIER
C5
COMMENTS
Input/Output Common Mode Includes Ground, 70 V V
and 2.5 V/ C Drift (Max), 200kHz GBW, 0.07V/ s Slew Rate
High DC Accuracy, 10 V V
1V/ s Slew Rate, Supply Current 2.2mA (Max), Single Supply,
Can Be Configured for C-Load
Input/Output Common Mode Includes Ground, 70 V V
and 4 V/ C Drift (Max), 85kHz GBW, 0.04V/ s Slew Rate
475 V V
130k
IRF9620
R12
R13
10k
8
OS(MAX)
Q2
–180V
R14
10k
R15
47k
13
12
, 500V/mV A
IRF628
–
+
1/4 LT1491
Q1
15V
100k
11
R20
Z2
60V
14901fa LT/TP 0897 4K REV A • PRINTED IN USA
R24
4
420
OS(MAX)
VOL(MIN)
LINEAR TECHNOLOGY CORPORATION 1996
100k
TM
15V
Z1
R19
620
Operation
47 F
14
C7
, 100nV/ C, 1MHz GBW,
100k
R16
, 400kHz GBW
2N3904
R23
4.7k
R25
4.7k
620
100
Q4
2N3906
R17
R18
Q3
R21
150
1490/1491 TA03
C6
0.033 F
LOAD
OS(MAX)
OS(MAX)
Q5
2N3904
R26
2k
UP TO
TEN
PHONES
OPTO1*