LINER LT1490A Dual/quad over-the-top micropower rail-to-rail input and output op amp Datasheet

LT1490A/LT1491A
Dual/Quad Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amps
DESCRIPTION
FEATURES
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Low Input Offset Voltage: 500μV Max
Output Swings to 10mV Max from V–
Rail-to-Rail Input and Output
Micropower: 50μA/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
APPLICATIONS
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Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
Micropower Active Filters
4mA to 20mA Transmitters
The LT1490A/LT1491A have a unique input stage that operates 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– or 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
CHARGER
VOLTAGE
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 capacitive loads up to 10,000pF
when optional 0.22μF and 150Ω compensation is used.
Battery Monitor
RS
0.2Ω
RA
2k
IBATT
RA´
2k
+
Q1
2N3904
1/4 LT1491A
–
–
1/4 LT1491A
LOGIC
+
RB
2k
R B´
2k
LOAD
+
Q2
2N3904
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
1/4 LT1491A
–
+
+
RG
10k
VBATT = 12V
S1
1/4 LT1491A
VOUT
–
10k
90.9k
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
RA = RB
VS = 5V, 0V
1490A TA01
IBATT =
VOUT
V
= OUT AMPS
(RS)(RG /RA)(GAIN) GAIN
14901afd
1
LT1490A/LT1491A
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V+ to V–) ............................... 44V
Differential Input Voltage ......................................... 44V
Input Current (Note 9) ......................................... ±12mA
Output Short-Circuit Duration (Note 2) ........ Continuous
Operating Temperature Range (Note 3)
LT1490AC/LT1491AC ...........................–40°C to 85°C
LT1490AI/LT1491AI .............................–40°C to 85°C
LT1490AH/LT1491AH......................... –40°C to 125°C
Specified Temperature Range (Note 4)
LT1490AC/LT1490AI ............................–40°C to 85°C
LT1491AC/LT1491AI.............................–40°C to 85°C
LT1490AH/LT1491AH......................... –40°C to 125°C
Junction Temperature .......................................... 150°C
Junction Temperature (DD/DHC Package) ........... 125°C
Storage Temperature Range ................. –65°C to 150°C
Storage Temperature Range
DD/DHC Package .............................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PIN CONFIGURATION
LT1490A
LT1490A
LT1490A
TOP VIEW
TOP VIEW
TOP VIEW
OUT A
–IN A
+IN A
V–
1
2
3
4
A
B
8
7
6
5
V+
OUT B
–IN B
+IN B
OUT A
1
–IN A
2
+IN A
3
V–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 250°C/W
8
V+
7
OUT B
–IN A 2
6
–IN B
+IN A 3
+IN B
V– 4
A
B
4
5
OUT A 1
N8 PACKAGE
S8 PACKAGE
8-LEAD PDIP
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W (N8)
TJMAX = 150°C, θJA = 190°C/W (S8)
LT1491A
A
B
8
V+
7
OUT B
6
–IN B
5
+IN B
DD PACKAGE
8-LEAD (3mm w 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 160°C/W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V–
LT1491A
TOP VIEW
TOP VIEW
14 OUT D
OUT A 1
–IN A 2
+IN A 3
A
D
V+ 4
+IN B 5
–IN B 6
OUT B 7
13 –IN D
12 +IN D
11 V –
B
C
10 +IN C
9
–IN C
8
OUT C
N PACKAGE
S PACKAGE
14-LEAD PDIP
14-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 110°C/W (N)
TJMAX = 150°C, θJA = 150°C/W (S)
OUT A
1
–IN A
2
+IN A
3
16 OUT D
A
D
15 –IN D
14 +IN D
V+
4
+IN B
5
13 V–
–IN B
6
OUT B
7
10 OUT C
NC
8
9
B
C
12 +IN C
11 –IN C
NC
DHC16 PACKAGE
16-LEAD (5mm w 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 160°C/W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V–
14901afd
2
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/
14901afd
3
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 = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply
unless otherwise noted. (Note 4)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage (Note 5)
LT1490A N, S Packages
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
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l
LT1490A MS8 Package, LT1491A N, S Packages
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
LT1490A DD, LT1491A DHC
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
–40°C ≤ TA ≤ 85°C
LT1490A DD, LT1491A DHC, –40°C ≤ TA ≤ 85°C
VCM = 44V (Note 6)
Input Offset Voltage Drift (Note 9)
IOS
IB
Input Offset Current
Input Bias Current
VCM = 44V (Note 6)
VS = 0V
UNITS
110
500
700
800
μV
μV
μV
220
1000
1200
1400
μV
μV
μV
250
1200
1400
1600
μV
μV
μV
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l
2
2
4
6
l
l
0.2
0.8
0.8
nA
μA
l
l
1
3
0.3
8
10
nA
μA
nA
l
2
pA/°C
1
μVP-P
μV/°C
μV/°C
Input Bias Current Drift
–40°C ≤ TA ≤ 85°C
Input Noise Voltage
0.1Hz to 10Hz
en
Input Noise Voltage Density
f = 1kHz
50
nV/√Hz
in
Input Noise Current Density
f = 1kHz
0.015
pA/√Hz
RIN
Input Resistance
Differential
Common Mode, VCM = 0V to 44V
CIN
Input Capacitance
6
4
17
11
MΩ
MΩ
4.6
pF
l
0
CMRR
Common Mode Rejection Ratio
(Note 6)
VCM = 0V to VCC – 1V
VCM = 0V to 44V
l
l
84
80
98
98
AVOL
Large-Signal Voltage Gain
VS = 3V, VO = 500mV to 2.5V, RL = 10k
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
200
133
100
1500
V/mV
V/mV
V/mV
VS = 5V, VO = 500mV to 4.5V, RL = 10k
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
400
250
200
1500
V/mV
V/mV
V/mV
VS = 3V, No Load
VS = 3V, ISINK = 5mA
l
l
3
250
10
450
mV
mV
VS = 5V, No Load
VS = 5V, ISINK = 5mA
VS = 5V, ISINK = 10mA
l
l
3
250
330
10
500
500
mV
mV
mV
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
l
l
2.95
2.55
2.978
2.6
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
l
l
4.95
4.30
4.978
4.6
V
V
Input Voltage Range
VOL
VOH
ISC
Output Voltage Swing Low
Output Voltage Swing High
Short-Circuit Current (Note 2)
44
V
dB
dB
VS = 3V, Short to GND
VS = 3V, Short to VCC
10
10
15
30
mA
mA
VS = 5V, Short to GND
VS = 5V, Short to VCC
15
15
25
30
mA
mA
14901afd
4
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 = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply
unless otherwise noted. (Note 4)
SYMBOL
PARAMETER
CONDITIONS
PSRR
Power Supply Rejection Ratio
VS = 2.5V to 12.5V, VCM = VO = 1V
l
84
98
18
27
l
Minimum Operating Supply Voltage
Reverse Supply Voltage
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
IS = –100μA per Amplifier
l
2
40
UNITS
dB
2.5
V
V
IS
Supply Current per Amplifier
(Note 7)
GBW
Gain Bandwidth Product
(Note 6)
f = 1kHz
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
110
100
90
180
kHz
kHz
kHz
SR
Slew Rate
(Note 8)
AV = –1, RL = ∞
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
0.035
0.031
0.030
0.06
V/μs
V/μs
V/μs
l
50
55
μA
μA
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)
LT1490AC/LT1491AC
LT1490AI/LT1491AI
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage (Note 5)
LT1490A N, S Packages
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
LT1490A MS8 Package, LT1491A N, S Packages
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
LT1490A DD, LT1491A DHC
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
–40°C ≤ TA ≤ 85°C
LT1490A DD, LT1491A DHC, –40°C ≤ TA ≤ 85°C
Input Offset Voltage Drift (Note 9)
IOS
Input Offset Current
IB
Input Bias Current
Input Bias Current Drift
–40°C ≤ TA ≤ 85°C
Input Noise Voltage
0.1Hz to 10Hz
UNITS
150
700
950
1100
μV
μV
μV
250
1200
1350
1500
μV
μV
μV
285
1400
1550
1700
μV
μV
μV
l
l
2
2
6
7
l
0.2
0.8
l
1
8
l
5
pA/°C
1
μVP-P
μV/°C
μV/°C
nA
nA
en
Input Noise Voltage Density
f = 1kHz
50
nV/√Hz
in
Input Noise Current Density
f = 1kHz
0.015
pA/√Hz
RIN
Input Resistance
Differential
Common Mode, VCM = –15V to 14V
17
15000
MΩ
MΩ
CIN
Input Capacitance
4.6
pF
Input Voltage Range
6
l
–15
29
V
CMRR
Common Mode Rejection Ratio
VCM = –15V to 29V
l
80
98
dB
AVOL
Large-Signal Voltage Gain
VO = ±14V, RL = 10k
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
l
100
75
50
250
V/mV
V/mV
V/mV
VO
Output Voltage Swing
No Load
IOUT = ±5mA
IOUT = ±10mA
±14.9
±14.5
±14.5
±14.978
±14.750
±14.670
l
l
V
V
V
14901afd
5
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
ISC
Short-Circuit Current (Note 2)
Short to GND
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
±20
±15
±10
±25
mA
mA
mA
PSRR
Power Supply Rejection Ratio
VS = ±1.25V to ±22V
88
98
dB
IS
Supply Current per Amplifier
GBW
Gain Bandwidth Product
f = 1kHz
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
SR
Slew Rate
AV = –1, RL = ∞, VO = ±10V,
Measured at VO = ±5V
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
l
50
l
l
l
l
l
70
85
UNITS
μA
μA
125
110
100
200
kHz
kHz
kHz
0.0375
0.07
V/μs
0.0330
0.0300
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
PARAMETER
CONDITIONS
VOS
Input Offset Voltage (Note 5)
LT1490AHS8
LT1490AHMS8, LT1491AHS
IOS
IB
500
2500
μV
μV
220
1000
3000
μV
μV
3
6
l
VCM = 44V (Note 6)
l
l
2
1.5
nA
μA
VCM = 44V (Note 6)
l
l
20
15
nA
μA
Input Bias Current
Common Mode Rejection Ratio
(Note 6)
VCM = 0.3V to VCC –1V
VCM = 0.3V to 44V
AVOL
Large-Signal Voltage Gain
VS = 3V, VO = 500mV to 2.5V, RL = 10k
VS = 5V, VO = 500mV to 4.5V, RL = 10k
PSRR
l
110
Input Offset Voltage Drift (Note 9)
Input Voltage Range
VOH
l
UNITS
Input Offset Current
CMRR
VOL
LT1490AH/LT1491AH
MIN
TYP
MAX
Output Voltage Swing Low
Output Voltage Swing High
Power Supply Rejection Ratio
l
0.3
l
l
60
74
l
200
25
1500
V/mV
V/mV
l
400
50
1500
V/mV
V/mV
44
V
dB
dB
VS = 3V, No Load
VS = 3V, ISINK = 2.5mA
l
l
15
450
mV
mV
VS = 5V, No Load
VS = 5V, ISINK = 2.5mA
l
l
15
500
mV
mV
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
l
l
2.925
2.350
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
l
l
4.925
4.100
V
V
VS = 2.5V to 12.5V, VCM = VO = 1V
l
80
dB
l
Minimum Operating Supply Voltage
Reverse Supply Voltage
μV/°C
IS = –100μA per Amplifier
l
2.5
18
V
V
14901afd
6
LT1490A/LT1491A
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range of – 40°C ≤ TA ≤ 125°C. VS = ±15V, VCM = 0V, VOUT = 0V unless otherwise noted. (Note 4)
SYMBOL
PARAMETER
IS
Supply Current per Amplifier (Note 7)
GBW
Gain Bandwidth Product (Note 6)
f = 1kHz
SR
Slew Rate (Note 8)
AV = –1, RL = ∞
VOS
Input Offset Voltage (Note 5)
LT1490AHS8
LT1490AH/LT1491AH
MIN
TYP
MAX
CONDITIONS
40
l
110
60
180
kHz
kHz
l
0.035
0.015
0.06
V/μs
V/μs
l
Input Offset Voltage Drift (Note 9)
l
IOS
Input Offset Current
l
IB
Input Bias Current
l
Input Voltage Range
l
–14.7
l
72
l
100
4
CMRR
Common Mode Rejection Ratio
VCM = –14.7V to 29V
AVOL
Large-Signal Voltage Gain
VO = ±14V, RL = 10k
VO
Output Voltage Swing
No Load
IOUT = ±2.5mA
l
l
±14.8
±14.3
PSRR
Power Supply Rejection Ratio
VS = ±1.25V to ±22V
l
84
IS
Supply Current per Amplifier
GBW
Gain Bandwidth Product
f = 1kHz
SR
Slew Rate
AV = –1, RL = ∞
150
700
2700
μV
μV
250
1200
3200
μV
μV
3
7
μV/°C
2
nA
20
nA
29
V
dB
250
V/mV
V/mV
V
V
dB
50
l
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum. This depends on the power supply voltage and
how many amplifiers are shorted. The θJA specified for the DD and DHC
package is with minimal PCB heat spreading metal. Using expanded metal
area on all layers of a board reduces this value.
Note 3: The LT1490AC/LT1491AC and LT1490AI/LT1491AI are guaranteed
functional over the operating temperature range of – 40°C to 85°C.
The LT1490AH/LT1491AH are guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 4: The LT1490AC/LT1491AC are guaranteed to meet specified
performance from 0°C to 70°C. The LT1490AC/LT1491AC are designed,
characterized and expected to meet specified performance from
–40°C to 85°C but are not tested or QA sampled at these temperatures.
The LT1490AI/LT1491AI are guaranteed to meet specified performance
from –40°C to 85°C. The LT1490AH/LT1491AH are guaranteed to meet
specified performance from – 40°C to 125°C.
μA
μA
l
l
LT1490AHMS8, LT1491AHS
50
70
UNITS
70
95
μA
μA
l
125
75
200
kHz
kHz
l
0.0375
0.02
0.07
V/μs
V/μs
Note 5: ESD (electrostatic discharge) sensitive device. Extensive use
of ESD protection devices are used internal to the LT1490A/LT1491A.
However, high electrostatic discharge can damage or degrade the device.
Use proper ESD handling precautions.
Note 6: VS = 5V limits are guaranteed by correlation to VS = 3V and
VS = ±15V tests.
Note 7: VS = 3V limits are guaranteed by correlation to VS = 5V and
VS = ±15V tests.
Note 8: Guaranteed by correlation to slew rate at VS = ±15V and GBW
at VS = 3V and VS = ±15V tests.
Note 9: This parameter is not 100% tested.
14901afd
7
LT1490A/LT1491A
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
TA = 125°C
60
TA = 25°C
50
40
TA = –55°C
30
400
5000
300
3000
VS = 5V, 0V
200
100
TA = –55°C
TA = 25°C
0
–100
20
–200
–300
10
0
5
10 15 20 25 30 35 40
TOTAL SUPPLY VOLTAGE (V)
– 400
45
1
OUTPUT SATURATION VOLTAGE (V)
OUTPUT SATURATION VOLTAGE (V)
TA = 125°C
TA = 25°C
TA = –55°C
10μ
1m
10m
100μ
SOURCING LOAD CURRENT (A)
1
3
4
2
TOTAL SUPPLY VOLTAGE (V)
TA = 125°C
TA = –55°C
10m
1490A G03
1μ
10μ 100μ 1m
10m
SINKING LOAD CURRENT (A)
100m
60
50
40
30
9
10
1490A G07
OUTPUT HIGH
20
10
OUTPUT LOW
0
10
30
40
20
INPUT OVERDRIVE (mV)
50
1490A G06
Input Noise Current vs Frequency
0.35
INPUT NOISE CURRENT DENSITY (pA/√Hz)
INPUT NOISE VOLTAGE DENSITY (nV/√Hz)
8
70
Noise Voltage Density
vs Frequency
NOISE VOLTAGE (400nV/DIV)
7
80
1490A G05
100
80
60
40
20
4 5 6
TIME (SEC)
VS = 5V, 0V
90 NO LOAD
0
120
3
44
Output Saturation Voltage
vs Input Overdrive
TA = 25°C
0.1Hz to 10Hz Noise Voltage
2
0 4.0 4.4 4.8 5.2 5.6
COMMON MODE VOLTAGE (V)
100
1490A G04
1
–0.4
5
VS = 5V, 0V
1m
0.1μ
100m
VS = ±2.5V
TA = 125°C
10
–10
0
100m
100m
TA = 25°C
20
Output Saturation Voltage
vs Load Current (Output Low)
VS = 5V, 0V
0
30
1490A G02
Output Saturation Voltage
vs Load Current (Output High)
1μ
TA = –55°C
0
TA = 125°C
1490A G01
1
1000
OUTPUT SATURATION VOLTAGE (mV)
0
10m
INPUT BIAS CURRENT (nA)
CHANGE IN INPUT OFFSET VOLTAGE (μV)
SUPPLY CURRENT PER AMPLIFIER (μA)
80
70
Input Bias Current
vs Common Mode Voltage
Minimum Supply Voltage
0.30
0.25
0.20
0.15
0.10
0.05
0
1
10
100
FREQUENCY (Hz)
1k
1490A G08
1
10
100
FREQUENCY (Hz)
1k
1490A G09
14901afd
8
LT1490A/LT1491A
TYPICAL PERFORMANCE CHARACTERISTICS
Gain and Phase Shift
vs Frequency
Gain Bandwidth Product
vs Temperature
40
30
20
20
0
GAIN
10
f = 1kHz
–20
0
– 40
–10
– 60
–20
– 80
–30
1
PHASE SHIFT (DEG)
GAIN (dB)
240
60
PHASE
40
80
–100
1000
10
100
FREQUENCY (kHz)
200
VS = ±15V
180
VS = ±1.5V
160
100
–50 –25
50
25
0
75
TEMPERATURE (°C)
220
40
210
200
GAIN BANDWIDTH
30
180
20
170
RL = 10k
f = 1kHz
COMMON MODE REJECTION RATIO (dB)
50
PHASE MARGIN (DEG)
GAIN BANDWIDTH PRODUCT (kHz)
0.04
–50 –25
125
100
VS = ±15V
80
VS = ±1.5V
60
40
VS = ±2.5V
70
60
POSITIVE SUPPLY
50
40
30
20
NEGATIVE SUPPLY
10
0
–10
–20
1
10
125
100
PSRR vs Frequency
80
20
10 15 20 25 30 35 40
TOTAL SUPPLY VOLTAGE (V)
50
25
0
75
TEMPERATURE (°C)
1490A G12
CMRR vs Frequency
PHASE MARGIN
5
100
120
240
0
FALLING, VS = ±1.5V
120
60
150
FALLING, VS = ±15V
1490A G11
250
160
RISING, VS = ±1.5V
0.08
0.06
140
Gain Bandwidth Product and
Phase Margin vs Supply Voltage
190
RISING, VS = ±15V
0.10
220
1490A G10
230
Slew Rate vs Temperature
0.12
POWER SUPPLY REJECTION RATIO (dB)
50
260
SLEW RATE (V/μs)
VS = ±2.5V
60
100
GAIN BANDWIDTH PRODUCT (kHz)
70
45
10
FREQUENCY (kHz)
1
100
10
FREQUENCY (kHz)
100
1490A G15
1490A G14
1490A G13
Gain Bandwidth Product and
Phase Margin vs Load Resistance
PHASE MARGIN
250
70
60
50
200
GAIN BANDWIDTH
150
40
100
30
50
1
10
LOAD RESISTANCE (kΩ)
20
100
1490A G16
VS = ±15V
110
OUTPUT IMPEDANCE (Ω)
300
Output Impedance vs Frequency
10k
120
CHANNEL SEPARATION (dB)
VS = ±2.5V
AV = –1
RF = RG = 100k
f = 1kHz
Channel Separation vs Frequency
130
80
PHASE MARGIN (DEG)
GAIN BANDWIDTH PRODUCT (kHz)
350
100
90
80
70
60
VS = ±2.5V
1k
AV = 100
100
AV = 10
10
1
AV = 1
50
40
0.1
1
10
FREQUENCY (kHz)
100
1490A G17
0.1
0.1
1
10
FREQUENCY (kHz)
100
1490A G18
14901afd
9
LT1490A/LT1491A
TYPICAL PERFORMANCE CHARACTERISTICS
Undistorted Output Swing
vs Frequency
Settling Time to 0.1%
vs Output Step
10
35
DISTORTION ≤ 1%
VS = ±15V
30
15
10
VS = 5V, 0V
5
–4
0
100
60
50
40
AV = 1
AV = 2
AV = 10
AV = 5
30
10
0
–10
1
10
FREQUENCY (kHz)
70
20
AV = –1
AV = 1
20
40
60 80 100 120 140 160
SETTLING TIME (μs)
10
100
1000
CAPACITIVE LOAD (pF)
10000
1490A G19
1490A F20
1490A G21
Total Harmonic Distortion + Noise
vs Frequency
Total Harmonic Distortion + Noise
vs Load Resistance
Total Harmonic Distortion + Noise
vs Output Voltage
10
VS = 3V, 0V
VOUT = 2VP-P
VCM = 1.2V
RL = 50k
1
VS = ±1.5V
VIN = ±1V
0.1
VS = 3V, 0V
VIN = 0.5V TO 2.5V
0.1
1
FREQUENCY (kHz)
10
0.001
0.1
AV = –1
VS = 3V, 0V
0.001
1
10
LOAD RESISTANCE TO GROUND (kΩ)
1490A G22
Open-Loop Gain
AV = 1
VS = ±1.5V
AV = 1
VS = 3V, 0V
VS = 3V, 0V
VIN = 0.2V TO 2.2V
AV = 1
CHANGE IN INPUT OFFSET VOLTAGE
(100μV/DIV)
AV = –1
VS = ±1.5V
0.1
0.01
0.01
AV = –1
0.001
0.01
RL = 10k
VCM = HALF SUPPLY
f = 1kHz
1
0.1
0.01
10
VS = 3V TOTAL
AV = 1
VIN = 2VP-P AT 1kHz
THD + NOISE (%)
THD + NOISE (%)
1
0
–2
–6
THD + NOISE (%)
10
2
–8
0
0.1
80
AV = 1
4
VS = 5V, 0V
ISOURCE = 170μA
90
AV = –1
OVERSHOOT (%)
OUTPUT STEP (V)
OUTPUT SWING (VP-P)
20
100
VS = ±15V
8
6
25
Capacitive Load Handling,
Overshoot vs Capacitive Load
100
0
1
2
OUTPUT VOLTAGE (VP-P)
1490A G24
1490A G23
Large-Signal Response
3
Small-Signal Response
VS = ±15V
RL = 2k
RL = 10k
RL = 50k
–10V
0V
10V
OUTPUT VOLTAGE (5V/DIV)
1490A G25
VS = ±15V
AV = –1
1491A G26
VS = ±15V
AV = 1
1491A G27
14901afd
10
LT1490A/LT1491A
APPLICATIONS INFORMATION
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 capacitor should be used. When using
split supplies, the same is true for the negative supply pin.
The LT1490A/LT1491A are protected against reverse battery
voltages up to 18V. In the event a reverse battery condition
occurs, the supply current is less than 1nA.
The LT1490A/LT1491A can be shut down by removing V +.
In this condition the input bias current is typically less than
0.5nA, even if the inputs are 44V above the negative supply.
When operating the LT1490A/LT1491A on total supplies of
20V or more, the supply must not rise to its final voltage
in less than 1μs. This is especially true if low ESR bypass
capacitors are used. A series RLC circuit is formed from
the supply lead inductance and the bypass capacitor. A
resistance of 7.5Ω in the supply or in the bypass capacitor
will dampen the tuned circuit enough to limit the rise time.
Inputs
The LT1490A/LT1491A have two input stages, NPN and PNP
(see the Simplified Schematic), resulting in three distinct
operating regions as shown in the Input Bias Current vs
Common Mode typical performance curve.
For input voltages about 0.8V or more below V +, the PNP
input stage is active and the input bias current is typically
–1nA. When the input voltage is about 0.5V or less from
V +, the NPN input stage is operating and the input bias
current is typically 25nA. Increases in temperature will
cause the voltage at which operation switches from the
PNP stage to the NPN stage to move towards V+. The
input offset voltage of the NPN stage is untrimmed and
is typically 600μV.
A Schottky diode in the collector of each NPN transistor of
the NPN input stage allows the LT1490A/LT1491A to operate
with either or both of their inputs above V +. At about 0.3V
above V+ the NPN input transistor is fully saturated and the
input bias current is typically 3μA at room temperature.
The input offset voltage is typically 700μV when operating
above V+. The LT1490A/LT1491A will operate with their
inputs 44V above V – regardless of V +.
The inputs are protected against excursions as much as
15V below V – by an internal 1k resistor in series with
each input and a diode from the input to the negative
supply. There is no output phase reversal for inputs up to
15V below V–. There are no clamping diodes between the
inputs and the maximum differential input voltage is 44V.
Output
The output voltage swing of the LT1490A/LT1491A is
affected by input overdrive as shown in the typical performance curves.
The output of the LT1490A/LT1491A can be pulled up to
18V beyond V + with less than 1nA of leakage current,
provided that V+ is less than 0.5V.
The normally reverse-biased substrate diode from the
output to V – will cause unlimited currents to flow when
the output is forced below V–. If the current is transient
and limited to 100mA, no damage will occur.
The LT1490A/LT1491A are internally compensated to drive
at least 200pF of capacitance under any output loading
conditions. A 0.22μF capacitor in series with a 150Ω resistor between the output and ground will compensate these
amplifiers for larger capacitive loads, up to 10,000pF, at
all output currents.
Distortion
There are two main contributors of distortion in op amps:
output crossover distortion as the output transitions
from sourcing to sinking current and distortion caused
by nonlinear common mode rejection. Of course, if the
op amp is operating inverting there is no common mode
induced distortion. When the LT1490A/LT1491A switch
between input stages there is significant nonlinearity in
the CMRR. Lower load resistance increases the output
crossover distortion, but has no effect on the input stage
transition distortion. For lowest distortion the LT1490A/
LT1491A should be operated single supply, with the output always sourcing current and with the input voltage
swing between ground and (V + – 0.8V). See the Typical
Performance Characteristics curves.
14901afd
11
LT1490A/LT1491A
APPLICATIONS INFORMATION
in single supply applications where the load is returned
to ground. The typical performance photo of Open-Loop
Gain for various loads shows the details.
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes performance
TYPICAL APPLICATIONS
Square Wave Oscillator
Optional Output Compensation for
Capacitive Loads Greater Than 200pF
59k
5V
+
VIN
100k
1/2 LT1490A
+
1/2 LT1490A
100k
CL ≤ 10,000pF
–
VOUT
–
R
50k
C
0.1μF
0.22μF
150Ω
1490A TA02
1490A TA04
f= 1
2RC
VOUT = 5VP-P WITH 5V SUPPLY
IS = 200μA
AT VS = 5V, R = 50k, C = 1nF
OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE
SIMPLIFIED SCHEMATIC
V+
Q2
Q1
D1
R1
30k
Q3
D2
Q22
D3
R2
1k
Q4
Q19
– IN
Q17
Q7
R3
1k
+
Q8
Q11
OUT
Q16
+IN
2μA
Q18
Q15
Q9
Q5
Q20
Q12
Q6
D4
D5
Q10
Q13
Q14
R4
40k
Q21
R5
40k
V–
ONE AMPLIFIER
1490A SS
14901afd
12
LT1490A/LT1491A
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DD Package
8-Lead Plastic DFN (3mm w 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
R = 0.125
TYP
5
0.40 t 0.10
8
0.70 t0.05
3.00 t0.10
(4 SIDES)
3.5 t0.05
1.65 t0.05
2.10 t0.05 (2 SIDES)
1.65 t 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
PACKAGE
OUTLINE
4
0.25 t 0.05
0.75 t0.05
(DD8) DFN 0509 REV C
1
0.25 t 0.05
0.50 BSC
0.50
BSC
2.38 t0.05
2.38 t0.10
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev F)
3.00 t 0.102
(.118 t .004)
(NOTE 3)
0.889 t 0.127
(.035 t .005)
0.254
(.010)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.65
(.0256)
BSC
RECOMMENDED SOLDER PAD LAYOUT
7 6 5
0.52
(.0205)
REF
3.00 t 0.102
(.118 t .004)
(NOTE 4)
4.90 t 0.152
(.193 t .006)
DETAIL “A”
0s – 6s TYP
GAUGE PLANE
1
0.53 t 0.152
(.021 t .006)
0.42 t 0.038
(.0165 t .0015)
TYP
8
DETAIL “A”
1.10
(.043)
MAX
2 3
4
0.86
(.034)
REF
0.18
(.007)
SEATING
PLANE
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.1016 t 0.0508
(.004 t .002)
MSOP (MS8) 0307 REV F
14901afd
13
LT1490A/LT1491A
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
N Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510 Rev I)
.300 – .325
(7.620 – 8.255)
8.255
+0.889
–0.381
.130 t .005
(3.302 t 0.127)
.045 – .065
(1.143 – 1.651)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
+.035
.325 –.015
.400*
(10.160)
MAX
8
7
6
1
2
3
5
.255 t .015*
(6.477 t 0.381)
.120
(3.048) .020
MIN
(0.508)
MIN
.018 t .003
.100
(2.54)
BSC
4
N8 REV I 0711
(0.457 t 0.076)
NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 p.005
.050 BSC
8
.245
MIN
7
6
5
.160 p.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 p.005
TYP
1
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
s 45o
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
0o– 8o TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
2
3
4
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
SO8 0303
14901afd
14
LT1490A/LT1491A
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
N Package
14-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510 Rev I)
.770*
(19.558)
MAX
14
13
12
11
10
9
8
1
2
3
4
5
6
7
.255 ± .015*
(6.477 ± 0.381)
.300 – .325
(7.620 – 8.255)
.045 – .065
(1.143 – 1.651)
.130 ± .005
(3.302 ± 0.127)
.020
(0.508)
MIN
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
+.035
.325 –.015
+0.889
8.255
–0.381
.005
(0.127) .100
MIN (2.54)
BSC
.120
(3.048)
MIN
NOTE:
1. DIMENSIONS ARE
.018 ± .003
(0.457 ± 0.076)
N14 REV I 0711
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
(8.560 – 8.738)
NOTE 3
.045 ±.005
.050 BSC
14
N
12
11
10
9
8
N
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
1
.030 ±.005
TYP
13
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.010 – .020
w 45
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
2
3
4
5
.053 – .069
(1.346 – 1.752)
NOTE:
1. DIMENSIONS IN
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
7
.004 – .010
(0.101 – 0.254)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
6
.050
(1.270)
BSC
S14 0502
14901afd
15
LT1490A/LT1491A
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DHC Package
16-Lead Plastic DFN (5mm × 3mm)
(Reference LTC DWG # 05-08-1706)
0.65 p0.05
3.50 p0.05
1.65 p0.05
2.20 p0.05 (2 SIDES)
PACKAGE
OUTLINE
0.25 p 0.05
0.50 BSC
4.40 p0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
R = 0.115
TYP
5.00 p0.10
(2 SIDES)
R = 0.20
TYP
3.00 p0.10
(2 SIDES)
9
0.40 p 0.10
16
1.65 p 0.10
(2 SIDES)
PIN 1
TOP MARK
(SEE NOTE 6)
PIN 1
NOTCH
(DHC16) DFN 1103
8
0.200 REF
1
0.25 p 0.05
0.50 BSC
0.75 p0.05
4.40 p0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC
PACKAGE OUTLINE MO-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
14901afd
16
LT1490A/LT1491A
REVISION HISTORY
(Revision history begins at Rev C)
REV
DATE
DESCRIPTION
PAGE NUMBER
C
10/10
Changed units from mV to V for VO in Electrical Characteristics
D
12/11
7
Updated package drawings
13-16
Revised Order Information
3
14901afd
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
17
LT1490A/LT1491A
TYPICAL APPLICATION
Ring-Tone Generator
60V
R16
100k
R2
47k
R3
10k
C2
0.47μF
3
+
R1
1/4 LT1491A
33k 2
1
D1
1N4148
R5
100k
5
–
7
R9
300k
R7
16k
–
R11
10k
10
+
1/4 LT1491A
C4
0.068μF
9
R4
1.6M
R8
620k
CADENCE OSCILLATOR
8
13
–
R14
10k
R13
130k
R15
47k
C5
0.01μF
4
–
1/4 LT1491A
R12
R10 SMOOTHING FILTER 10k
620k
20Hz OSCILLATOR
+
R24
11 420
14
C7
47μF
R18
100Ω
R26
2k
R23
4.7k
OPTO1*
R25
4.7k
Q5
2N3904
Z2
15V
*LED OF OPTO1 ILLUMINATES WHEN THE PHONE IS OFF THE HOOK
SEE DESIGN NOTE DN134 FOR A DISCUSSION OF THE CIRCUIT
R17
620Ω
Z1
15V
100k
12
C1
1μF
Q3
2N3904
C3
0.047μF
+
1/4 LT1491A
6
Q1
IRF628
R6
10k
UP TO
LOAD TEN
PHONES
R19
620Ω
Q4
2N3906
Q2
IRF9620
R21
150Ω
C6
0.033μF
POWER AMPLIFIER
–180V
R20
100k
1490A TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1366/LT1367
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
475μV VOS(MAX), 500V/mV AVOL(MIN), 400kHz GBW
LT1636
Single Over-The-Top Micropower Rail-to-Rail Input and Output
Op Amp
55μA Supply Current, VCM Extends 44V Above VEE,
Independent of VCC, MSOP Package, Shutdown Function
LT1638/LT1639
Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
0.4V/μs Slew Rate, 230μA Supply Current per Amplifier
LT1782
Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and
Output Op Amp
SOT-23, 800μV VOS(MAX), IS = 55μA (Max),
Gain-Bandwidth = 200kHz, Shutdown Pin
LT1783
1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and
Output Op Amp
SOT-23, 800μV VOS(MAX), IS = 300μA (Max),
Gain-Bandwidth = 1.2MHz, Shutdown Pin
14901afd
18 Linear Technology Corporation
LT 1211 REV D • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011