IC OPAMP QUAD R-R MCRPWR 14SOIC

LT1491ACS

Manufacturer Part NumberLT1491ACS
DescriptionIC OPAMP QUAD R-R MCRPWR 14SOIC
ManufacturerLinear Technology
SeriesOver-The-Top®
LT1491ACS datasheet
 


Specifications of LT1491ACS

Amplifier TypeGeneral PurposeNumber Of Circuits4
Output TypeRail-to-RailSlew Rate0.07 V/µs
Gain Bandwidth Product200kHzCurrent - Input Bias1nA
Voltage - Input Offset250µVCurrent - Supply50µA
Current - Output / Channel25mAVoltage - Supply, Single/dual (±)2 V ~ 44 V, ±1 V ~ 22 V
Operating Temperature0°C ~ 70°CMounting TypeSurface Mount
Package / Case14-SOIC (3.9mm Width), 14-SOLLead Free Status / RoHS StatusContains lead / RoHS non-compliant
-3db Bandwidth-  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
Page 1/16

Download datasheet (340Kb)Embed
Next
FEATURES
µ
Low Input Offset Voltage: 500
Output Swings to 10mV Max from V
Rail-to-Rail Input and Output
Micropower: 50µ µ µ µ µ A/Amplifier Max
®
Over-The-Top
Input Common Mode Range Extends
44V Above V
, Independent of V
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
Tiny 3mm × 3mm × 0.8mm DFN Package
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.
Over-The-Top is a registered trademark of Linear Technology Corporation.
Protected by U.S. Patents including 5825228.
U
TYPICAL APPLICATIO
CHARGER
VOLTAGE
LOAD
I
BATT
Dual/Quad Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amps
DESCRIPTIO
V Max
®
The LT
1490A/LT1491A are dual and quad op amps with a
low input offset voltage of 500µV max. The LT1490A/LT1491A
operate on all single and split supplies with a total voltage of
2V to 44V, drawing only 40µA of quiescent current per
amplifier. These amplifiers are reverse supply protected;
+
they draw virtually no current for reverse supply up to 18V.
The input range of the LT1490A/LT1491A includes both
supplies and the output swings to both supplies. Unlike most
micropower op amps, the LT1490A/LT1491A can drive
heavy loads; their rail-to-rail outputs drive 20mA. The
LT1490A/LT1491A are unity-gain stable and drive all capaci-
tive loads up to 10,000pF when optional 0.22µF and 150Ω
compensation is used.
The LT1490A/LT1491A 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 resistors
protect the inputs for faults below the negative supply up to
15V. There is no phase reversal of the output for inputs 15V
below V
The LT1490A dual op amp is available in the 8-pin MSOP,
PDIP and SO packages. For space limited applications
LT1490A is available in a 3mm × 3mm × 0.8mm, dual fine
pitch leadless package (DFN). The quad LT1491A is available
in the 14-pin SO, PDIP and 5mm × 3mm × 0.8mm DFN
packages.
Battery Monitor
R
R A
S
0.2Ω
2k
Q1
+
2N3904
R
´
I
A
1/4 LT1491A
BATT
2k
R
B
2k
Q2
+
2N3904
R
´
B
1/4 LT1491A
2k
+
R
G
10k
V
= 12V
BATT
S1
10k
V
V
S1 = OPEN, GAIN = 1
OUT
OUT
=
=
AMPS
(R
)(R
/R
)(GAIN)
GAIN
S1 = CLOSED, GAIN = 10
S
G
A
LT1490A/LT1491A
U
+
or 44V above V
, independent of V
.
1/4 LT1491A
LOGIC
+
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
+
1/4 LT1491A
V
OUT
90.9k
1490A TA01
R
= R
A
B
V
= 5V, 0V
S
sn1490, 14901afbs
1

LT1491ACS Summary of contents

  • Page 1

    ... Sensor Conditioning ■ Supply Current Sensing ■ Battery Monitoring Micropower Active Filters ■ ■ 4mA to 20mA Transmitters , LTC and LT are registered trademarks of Linear Technology Corporation. Over-The-Top is a registered trademark of Linear Technology Corporation. Protected by U.S. Patents including 5825228. U TYPICAL APPLICATIO CHARGER VOLTAGE LOAD I ...

  • Page 2

    ... JMAX JA S8/N8 ORDER PART PART MARKING NUMBER 1490A LT1490ACS8 1490AI LT1490AIS8 1490AH LT1490AHS8 LT1490ACN8 LT1490AIN8 TOP VIEW ORDER PART NUMBER OUT A 1 – LT1491ACS A + LT1491AIS V+ 4 LT1491AHS + – LT1491ACN OUT B 7 LT1491AIN NC 8 DHC16 PACKAGE 16-LEAD (5mm × 3mm) PLASTIC DFN = 125° ...

  • Page 3

    ELECTRICAL CHARACTERISTICS range of – 40°C ≤ T ≤ 85°C, otherwise specifications are otherwise noted. (Note 4) SYMBOL PARAMETER V Input Offset Voltage (Note 5) OS Input Offset Voltage Drift (Note 9) I Input Offset Current OS ...

  • Page 4

    LT1490A/LT1491A ELECTRICAL CHARACTERISTICS range of – 40°C ≤ T ≤ 85°C, otherwise specifications are otherwise noted. (Note 4) SYMBOL PARAMETER PSRR Power Supply Rejection Ratio Minimum Operating Supply Voltage Reverse Supply Voltage I Supply Current per Amplifier ...

  • Page 5

    ELECTRICAL CHARACTERISTICS range of – 40°C ≤ T ≤ 85°C, otherwise specifications are SYMBOL PARAMETER I Short-Circuit Current (Note 2) SC PSRR Power Supply Rejection Ratio I Supply Current per Amplifier S GBW Gain Bandwidth Product SR ...

  • Page 6

    LT1490A/LT1491A ELECTRICAL CHARACTERISTICS range of – 40°C ≤ T ≤ 125° ±15V SYMBOL PARAMETER I Supply Current per Amplifier (Note 7) S GBW Gain Bandwidth Product (Note 6) SR Slew Rate (Note 8) V Input ...

  • Page 7

    W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 125° 25° –55° ...

  • Page 8

    LT1490A/LT1491A W U TYPICAL PERFOR A CE CHARACTERISTICS Gain and Phase Shift vs Frequency 70 = ±2. PHASE GAIN 10 0 –10 –20 – 100 1000 FREQUENCY (kHz) 1490A G10 Gain ...

  • Page 9

    W U TYPICAL PERFOR A CE CHARACTERISTICS Undistorted Output Swing vs Frequency 35 DISTORTION ≤1% = ±15V 5V 0 100 FREQUENCY (kHz) 1490A G19 Total ...

  • Page 10

    LT1490A/LT1491A U U APPLICATIO S I FOR ATIO Supply Voltage The positive supply pin of the LT1490A/LT1491A should be bypassed with a small capacitor (about 0.01µF) within an inch of the pin. When driving heavy loads an additional 4.7µF electrolytic ...

  • Page 11

    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 performance U TYPICAL APPLICATIO S Square Wave Oscillator 59k 5V 100k + 1/2 LT1490A 100k – ...

  • Page 12

    LT1490A/LT1491A PACKAGE DESCRIPTIO 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 5.23 (.206) MIN 0.42 ± 0.04 (.0165 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT ...

  • Page 13

    PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT ...

  • Page 14

    LT1490A/LT1491A PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR ...

  • Page 15

    ... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 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. U DHC Package 16-Lead Plastic DFN (5mm × ...

  • Page 16

    ... R20 –180V 100k 1490A TA03 , 500V/ 400kHz GBW OS(MAX) VOL(MIN) Extends 44V above MSOP Package, Shutdown Function =55µA (Max), OS(MAX =300µA (Max), OS(MAX) S sn1490, 14901afbs LT/TP 0105 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2000 R26 2k OPTO1 TEN PHONES ...