LT1491CN Linear Technology, LT1491CN Datasheet

IC OP-AMP R-R IN/OUT QUAD 14-DIP

LT1491CN

Manufacturer Part Number
LT1491CN
Description
IC OP-AMP R-R IN/OUT QUAD 14-DIP
Manufacturer
Linear Technology
Series
Over-The-Top®r
Datasheet

Specifications of LT1491CN

Amplifier Type
General Purpose
Number Of Circuits
4
Output Type
Rail-to-Rail
Slew Rate
0.07 V/µs
Gain Bandwidth Product
200kHz
Current - Input Bias
1nA
Voltage - Input Offset
350µV
Current - Supply
50µA
Current - Output / Channel
25mA
Voltage - Supply, Single/dual (±)
2 V ~ 44 V, ±1 V ~ 22 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
14-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
-3db Bandwidth
-
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
Rail-to-Rail Input and Output
Single Supply Input Range: – 0.4V to 44V
Micropower: 50 A/Amplifier Max
MSOP Package
Specified on 3V, 5V and 15V Supplies
High Output Current: 20mA
Output Drives 10,000pF with Output Compensation
Reverse Battery Protection to 18V
No Supply Sequencing Problems
High Voltage Gain: 1500V/mV
High CMRR: 98dB
No Phase Reversal
Gain Bandwidth Product: 200kHz
Battery- or Solar-Powered Systems
Supply Current Sensing
Battery Monitoring
Micropower Active Filters
4mA to 20mA Transmitters
Portable Instrumentation
Sensor Conditioning
U
CHARGER
VOLTAGE
I
BATT
U
LOAD
=
I
(R
0.2
BATT
R
S
S
)(R
G
V
/R
OUT
+
A
)(GAIN)
V
BATT
R
R
R A
2k
2k
R
2k
2k
A
B
B
'
'
= 12V
=
V
GAIN
OUT
Battery Monitor
AMPS
+
1/4 LT1491
+
1/4 LT1491
A
B
Input and Output Op Amps
2N3904
DESCRIPTIO
The dual LT
single and split supplies with a total voltage of 2V to 44V
drawing only 40 A of quiescent current per amplifier. These
amplifiers are reverse supply protected; they draw no current
for reverse supply up to 18V. The input range of the LT1490/
LT1491 includes both supplies and the output swings to both
supplies. Unlike most micropower op amps, the LT1490/
LT1491 can drive heavy loads; their rail-to-rail outputs drive
20mA. The LT1490/LT1491 are unity-gain stable and drive all
capacitive loads up to 10,000pF when optional 0.22 F and
150 compensation is used.
The LT1490/LT1491 have a unique input stage that oper-
ates and remains high impedance when above the positive
supply. The inputs take 44V both differential and common
mode even when operating on a 3V supply. Built-in resis-
tors protect the inputs for faults below the negative supply
up to 22V. There is no phase reversal of the output for inputs
22V below V
The LT1490 dual op amp is available in the 8-pin MSOP,
SO and PDIP packages. The quad LT1491 is available in
the 14-pin SO and PDIP packages.
For new designs it is recommended that the LT1490A/
LT1491A be used instead of the LT1490/LT1491. See the
LT1490A/LT1491A data sheet for details.
2N3904
Q2
S1
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
Q1
R
10k
Micropower Rail-to-Rail
G
10k
®
1490 and quad LT1491 op amps operate on all
or 44V above V
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
1/4 LT1491
+
+
1/4 LT1491
R
V
C
D
A
S
90.9k
= 5V, 0V
= R
U
B
Dual and Quad
1490/91 TA01
LOGIC
V
OUT
, independent of V
LT1490/LT1491
+
.
1

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LT1491CN Summary of contents

Page 1

... Gain Bandwidth Product: 200kHz U APPLICATIO S Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning Supply Current Sensing Battery Monitoring Micropower Active Filters 4mA to 20mA Transmitters , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO CHARGER VOLTAGE LOAD I BATT Micropower Rail-to-Rail Input and Output Op Amps ...

Page 2

... LT1490CMS8 Package, LT1491 S Package – (Note 7) A – (Note 44V (Note 44V (Note 0.1Hz to 10Hz ORDER PART TOP VIEW NUMBER 14 OUT D LT1491CN 13 – LT1491CS 12 +IN D – LT1491IN + LT1491IS – OUT C S PACKAGE 14-LEAD PLASTIC SO = 150 C, = 110 150 C, = 150 half supply, unless otherwise noted ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are SYMBOL PARAMETER e Input Noise Voltage Density n i Input Noise Current Density n R Input Resistance IN C Input Capacitance IN Input Voltage Range CMRR Common Mode Rejection Ratio (Note ...

Page 4

LT1490/LT1491 ELECTRICAL CHARACTERISTICS range, otherwise specifications are SYMBOL PARAMETER V Input Offset Voltage Input Offset Voltage Drift OS I Input Offset Current OS I Input Bias Current B Input Noise Voltage e Input Noise ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 125 – ...

Page 6

LT1490/LT1491 W U TYPICAL PERFOR A CE CHARACTERISTICS Gain and Phase Shift vs Frequency 2. PHASE GAIN 10 0 –10 –20 – 100 1000 FREQUENCY (kHz) 1490/91 G10 Gain ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Undistorted Output Swing vs Frequency 35 DISTORTION 15V 2. 0 100 FREQUENCY (kHz) 1490/91 G19 Total Harmonic ...

Page 8

LT1490/LT1491 U U APPLICATIO S I FOR ATIO Supply Voltage The positive supply pin of the LT1490/LT1491 should be bypassed with a small capacitor (about 0.01 F) within an inch of the pin. When driving heavy loads an additional 4.7 ...

Page 9

U U APPLICATIO S I FOR ATIO Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes perfor- U TYPICAL APPLICATIO S Square Wave Oscillator 59k 5V 100k + 1/2 LT1490 100k – ...

Page 10

LT1490/LT1491 PACKAGE DESCRIPTIO 0.007 0 – 6 TYP (0.18) 0.021 0.006 (0.53 0.015) * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...

Page 11

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Dual/Quad 17 A Max, Single Supply, Precison Op Amps LT1366/LT1367 Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps LT1490A/LT1491A Dual/Quad Micropower Rail-to-Rail Precision Op Amps C-Load is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com ...

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