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LT1491A の電気的特性と機能

LT1491AのメーカーはLinearです、この部品の機能は「Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps」です。


製品の詳細 ( Datasheet PDF )

部品番号 LT1491A
部品説明 Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
メーカ Linear
ロゴ Linear ロゴ 




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LT1491A Datasheet, LT1491A PDF,ピン配置, 機能
LT1490A/LT1491A
Dual/Quad Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amps
FEATURES
DESCRIPTION
n Low Input Offset Voltage: 500μV Max
n Output Swings to 10mV Max from V
n Rail-to-Rail Input and Output
n Micropower: 50μA/Amplifier Max
n Over-The-Top® Input Common Mode Range Extends
44V Above V, Independent of V+
n Specified on 3V, 5V and ±15V Supplies
n High Output Current: 20mA
n Output Drives 10,000pF with Output Compensation
n Reverse Battery Protection to 18V
n No Supply Sequencing Problems
n High Voltage Gain: 1500V/mV
n High CMRR: 98dB
n No Phase Reversal
n Gain Bandwidth Product: 200kHz
n Tiny 3mm × 3mm × 0.8mm DFN Package
APPLICATIONS
n Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
n Supply Current Sensing
n Battery Monitoring
n Micropower Active Filters
n 4mA to 20mA Transmitters
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 ampli-
fier. 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 capacitive 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 Vor 44V above V, independent of 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.
L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners. Protected by U.S. Patents including 5825228.
TYPICAL APPLICATION
Battery Monitor
CHARGER
VOLTAGE
RS
0.2Ω
RA
2k
+
Q1
2N3904
IBATT
RA´
2k
1/4 LT1491A
1/4 LT1491A
LOGIC
+
LOAD
RB
2k
RB´
2k
+
VBATT = 12V
Q2
+ 2N3904
1/4 LT1491A
S1
RG
10k
10k
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
+
1/4 LT1491A
90.9k
VOUT
1490A TA01
IBATT
=
VOUT
=
(RS)(RG/RA)(GAIN)
VOUT AMPS
GAIN
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
RA = RB
VS = 5V, 0V
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LT1491A pdf, ピン配列
LT1490A/LT1491A
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LT1490ACMS8#PBF LT1490ACMS8#TRPBF LTNG
8-Lead Plastic MSOP
0°C to 70°C
LT1490AIMS8#PBF LT1490AIMS8#TRPBF LTPU
8-Lead Plastic MSOP
–40°C to 85°C
LT1490AHMS8#PBF LT1490AHMS8#TRPBF LTRK
8-Lead Plastic MSOP
–40°C to 125°C
LT1490ACS8#PBF
LT1490ACS8#TRPBF
1490A
8-Lead Plastic SO
0°C to 70°C
LT1490AIS8#PBF
LT1490AIS8#TRPBF
1490AI
8-Lead Plastic SO
–40°C to 85°C
LT1490AHS8#PBF
LT1490AHS8#TRPBF
1490AH
8-Lead Plastic SO
–40°C to 125°C
LT1490ACN8#PBF
LT1490ACN8#TRPBF
LT1490ACN8
8-Lead PDIP
0°C to 70°C
LT1490AIN8#PBF
LT1490AIN8#TRPBF
LT1490AIN8
8-Lead PDIP
–40°C to 85°C
LT1490ACDD#PBF LT1490ACDD#TRPBF LAAH
8-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
LT1490AIDD#PBF
LT1490AIDD#TRPBF
LAAH
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LT1491ACS#PBF
LT1491ACS#TRPBF
LT1491ACS
14-Lead Plastic SO
0°C to 70°C
LT1491AIS#PBF
LT1491AIS#TRPBF
LT1491AIS
14-Lead Plastic SO
–40°C to 85°C
LT1491AHS#PBF
LT1491AHS#TRPBF
LT1491AHS
14-Lead Plastic SO
–40°C to 125°C
LT1491ACN#PBF
LT1491ACN#TRPBF
LT1491ACN
14-Lead PDIP
0°C to 70°C
LT1491AIN#PBF
LT1491AIN#TRPBF
LT1491AIN
14-Lead PDIP
–40°C to 85°C
LT1491ACDHC#PBF LT1491ACDHC#TRPBF 1491A
16-Lead (5mm × 3mm) Plastic DFN 0°C to 70°C
LT1491AIDHC#PBF LT1491AIDHC#TRPBF 1491A
16-Lead (5mm × 3mm) Plastic DFN –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
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LT1491A 電子部品, 半導体
LT1490A/LT1491A
ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature
range of – 40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, VOUT = 0V unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN TYP MAX
UNITS
ISC
PSRR
IS
Short-Circuit Current (Note 2)
Power Supply Rejection Ratio
Supply Current per Amplifier
Short to GND
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
VS = ±1.25V to ±22V
±20
±15
±10
l 88
l
±25
98
50
70
85
mA
mA
mA
dB
μA
μA
GBW Gain Bandwidth Product
SR Slew Rate
f = 1kHz
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
AV = –1, RL = ∞, VO = ±10V,
Measured at VO = ±5V
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
125
l 110
l 100
0.0375
l 0.0330
l 0.0300
200
0.07
kHz
kHz
kHz
V/μs
V/μs
V/μs
The denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C, VS = 3V, 0V; VS = 5V, 0V;
VCM = VOUT = half supply unless otherwise noted. (Note 4)
SYMBOL
VOS
PARAMETER
Input Offset Voltage (Note 5)
CONDITIONS
LT1490AHS8
LT1490AHMS8, LT1491AHS
IOS
IB
CMRR
AVOL
VOL
VOH
PSRR
Input Offset Voltage Drift (Note 9)
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
(Note 6)
Large-Signal Voltage Gain
VCM = 44V (Note 6)
VCM = 44V (Note 6)
VCM = 0.3V to VCC –1V
VCM = 0.3V to 44V
VS = 3V, VO = 500mV to 2.5V, RL = 10k
VS = 5V, VO = 500mV to 4.5V, RL = 10k
Output Voltage Swing Low
Output Voltage Swing High
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Reverse Supply Voltage
VS = 3V, No Load
VS = 3V, ISINK = 2.5mA
VS = 5V, No Load
VS = 5V, ISINK = 2.5mA
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
VS = 2.5V to 12.5V, VCM = VO = 1V
IS = –100μA per Amplifier
LT1490AH/LT1491AH
MIN TYP MAX
110 500
l 2500
220 1000
l 3000
l 36
l2
l 1.5
l 20
l 15
l 0.3
44
l 60
l 74
200
l 25
1500
400
l 50
1500
l 15
l 450
l 15
l 500
l 2.925
l 2.350
l 4.925
l 4.100
l 80
l 2.5
l 18
UNITS
μV
μV
μV
μV
μV/°C
nA
μA
nA
μA
V
dB
dB
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
mV
V
V
V
V
dB
V
V
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共有リンク

Link :


部品番号部品説明メーカ
LT1491

Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps

Linear Technology
Linear Technology
LT1491A

Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps

Linear
Linear
LT1491CN

Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps

Linear Technology
Linear Technology
LT1491CS

Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps

Linear Technology
Linear Technology


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