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LT1490IS8#PBF

P1-P3P4-P6P7-P9P10-P12
1
LT1490/LT1491
Dual and Quad
Micropower Rail-to-Rail
Input and Output Op Amps
■
Rail-to-Rail Input and Output
■
Single Supply Input Range: –0.4V to 44V
■
Micropower: 50
µµ
µµ
µA/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
The dual LT
®
1490 and quad LT1491 op amps 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 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 0.22µF and
150Ω 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
–
or 44V above V
–
, independent of 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.
■
Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
■
Supply Current Sensing
■
Battery Monitoring
■
Micropower Active Filters
■
4mA to 20mA Transmitters
–
+
–
+
R
A
2k
Q2
2N3904
S1
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
R
A
= R
B
V
S
= 5V, 0V
10k
90.9k
V
OUT
LOGIC
1490/91 TA01
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
R
G
10k
Q1
2N3904
R
S
0.2Ω
CHARGER
VOLTAGE
A
1/4 LT1491
B
1/4 LT1491
R
A
'
2k
R
B
2k
V
BATT
= 12V
I
BATT
+
R
B
'
2k
LOAD
–
+
–
+
C
1/4 LT1491
D
1/4 LT1491
V
OUT
(R
S
)(R
G
/R
A
)(GAIN)
V
OUT
GAIN
I
BATT
= = AMPS
Battery Monitor
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LT1490/LT1491
Junction Temperature...........................................150°C
Specified Temperature Range (Note 3) .. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Total Supply Voltage (V
+
to V
–
) .............................. 44V
Input Differential Voltage ......................................... 44V
Input Current ......................................................±25mA
Output Short-Circuit Duration (Note 2).........Continuous
Operating Temperature Range ................ –40°C to 85°C
PACKAGE/ORDER INFORMATION
W
U
U
ORDER PART
NUMBER
Consult factory for Military grade parts.
LT1491CN
LT1491CS
LT1491IN
LT1491IS
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
N PACKAGE
14-LEAD PDIP
1
2
3
4
5
6
7
14
13
12
11
10
9
8
A
B
C
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V
–
+IN C
– IN C
OUT C
D
T
JMAX
= 150°C, θ
JA
= 110°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/ W (S)
T
JMAX
= 150°C, θ
JA
= 250°C/ W (MS8)
T
JMAX
= 150°C, θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C, θ
JA
= 190°C/ W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
MS8 PACKAGE
8-LEAD MSOP
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
V
+
OUT B
–IN B
+IN B
A
B
OUT A
–IN A
+IN A
V
–
S8 PART MARKING
MS8 PART MARKING
ORDER PART
NUMBER
LTBB
1490 1490I
LT1490CMS8
LT1490CN8
LT1490CS8
LT1490IN8
LT1490IS8
ABSOLUTE AXI U RATI GS
WWWU
(Note 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT1490 N Package 220 800 µV
0°C ≤ T
A
≤ 70°C ● 1000 µV
–40°C ≤ T
A
≤ 85°C ● 1100 µV
LT1490 S Package 220 950 µV
0°C ≤ T
A
≤ 70°C ● 1200 µV
–40°C ≤ T
A
≤ 85°C ● 1300 µV
LT1491 N Package 300 1100 µV
0°C ≤ T
A
≤ 70°C ● 1350 µV
–40°C ≤ T
A
≤ 85°C ● 1450 µV
LT1490CMS8 Package, LT1491 S Package 350 1450 µV
0°C ≤ T
A
≤ 70°C ● 1650 µV
–40°C ≤ T
A
≤ 85°C ● 1750 µV
V
OS
TC Input Offset Voltage Drift 0°C ≤ T
A
≤ 70°C (Note 7) ● 24 µV/°C
–40°C ≤ T
A
≤ 85°C (Note 7) ● 24 µV/°C
I
OS
Input Offset Current ● 0.2 0.8 nA
V
CM
= 44V (Note 4) ● 0.8 µA
I
B
Input Bias Current ● 48 nA
V
CM
= 44V (Note 4) ● 410 µA
V
S
= 0V 0.1 nA
Input Noise Voltage 0.1Hz to 10Hz 1 µV
P-P
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V; V
CM
= V
OUT
= half supply, unless otherwise noted. (Note 3)
(For new designs, use the LT1490A or LT1491A)
3
LT1490/LT1491
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
e
n
Input Noise Voltage Density f = 1kHz 50 nV/√Hz
i
n
Input Noise Current Density f = 1kHz 0.03 pA/√Hz
R
IN
Input Resistance Differential 6 17 MΩ
Common Mode, V
CM
= 0V to 44V 4 11 MΩ
C
IN
Input Capacitance 4.6 pF
Input Voltage Range ● 044V
CMRR Common Mode Rejection Ratio V
CM
= 0V to V
CC
– 1V ● 84 98 dB
(Note 4) V
CM
= 0V to 44V ● 80 98 dB
A
VOL
Large-Signal Voltage Gain V
S
= 3V, V
O
= 500mV to 2.5V, R
L
= 10k 200 1500 V/mV
0°C ≤ T
A
≤ 70°C ● 133 V/mV
–40°C ≤ T
A
≤ 85°C ● 100 V/mV
V
S
= 5V, V
O
= 500mV to 4.5V, R
L
= 10k 400 1500 V/mV
0°C ≤ T
A
≤ 70°C ● 250 V/mV
–40°C ≤ T
A
≤ 85°C ● 200 V/mV
V
OL
Output Voltage Swing Low V
S
= 3V, No Load ● 22 50 mV
V
S
= 3V, I
SINK
= 5mA ● 250 450 mV
V
S
= 5V, No Load ● 22 50 mV
V
S
= 5V, I
SINK
= 5mA ● 250 500 mV
V
S
= 5V, I
SINK
= 10mA 330 500 mV
V
OH
Output Voltage Swing High V
S
= 3V, No Load ● 2.95 2.978 V
V
S
= 3V, I
SOURCE
= 5mA ● 2.55 2.6 V
V
S
= 5V, No Load ● 4.95 4.978 V
V
S
= 5V, I
SOURCE
= 10mA ● 4.30 4.6 V
I
SC
Short-Circuit Current (Note 2) V
S
= 3V, Short to GND 10 15 mA
V
S
= 3V, Short to V
CC
10 30 mA
V
S
= 5V, Short to GND 15 25 mA
V
S
= 5V, Short to V
CC
15 30 mA
PSRR Power Supply Rejection Ratio V
S
= 2.5V to 12.5V, V
CM
= V
O
= 1V ● 84 98 dB
Minimum Operating Supply Voltage ● 2 2.5 V
Reverse Supply Voltage I
S
= –100µA per Amplifier ● 18 27 V
I
S
Supply Current per Amplifier 40 50 µA
(Note 5)
● 55 µA
GBW Gain Bandwidth Product f = 1kHz 110 180 kHz
(Note 4) 0°C ≤ T
A
≤ 70°C ● 100 kHz
–40°C ≤ T
A
≤ 85°C ● 90 kHz
SR Slew Rate A
V
= –1, R
L
= ∞ 0.035 0.06 V/µs
(Note 6) 0°C ≤ T
A
≤ 70°C ● 0.031 V/µs
–40°C ≤ T
A
≤ 85°C ● 0.030 V/µs
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V; V
CM
= V
OUT
= half supply, unless otherwise noted. (Note 3)
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LT1490IS8#PBF

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Buy LT1490IS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Operational Amplifiers - Op Amps Dual uP R-to-R I/O OA
Lifecycle:
New from this manufacturer.
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