LT1638/LT1639
1.2MHz, 0.4V/µs
Over-The-Top Micropower
Rail-to-Rail Input and Output
Op Amps
DESCRIPTION
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Operates with Inputs Above V +
Rail-to-Rail Input and Output
Low Power: 230μA per Amplifier Max
Gain Bandwidth Product: 1.2MHz
Slew Rate: 0.4V/μs
High Output Current: 25mA Min
Specified on 3V, 5V and ±15V Supplies
Reverse Battery Protection to 18V
No Supply Sequencing Problems
High Voltage Gain: 1500V/mV
Single Supply Input Range: –0.4V to 44V
High CMRR: 98dB
No Phase Reversal
Available in 14-Lead SO, 8-Lead MSOP and DFN
Packages
The LT ®1638 is a low p wer dual rail-to-rail input and output
operational amplifier available in the standard 8-pin PDIP
and SO packages as well as the 8-lead MSOP package. The
LT1639 is a low power quad rail-to-rail input and output
operational amplifier offered in the standard 14-pin PDIP
and surface mount packages. For space limited applications
the LT1638 is available in a 3mm x 3mm x 0.8mm dual
fine pitch leadless package (DFN).
The LT1638/LT1639 op amps operate on all single and split
supplies with a total voltage of 2.5V to 44V drawing only
170μA of quiescent current per amplifier. These amplifiers are reverse battery protected and draw no current
for reverse supply up to 18V.
The input range of the LT1638/LT1639 includes both supplies, and a unique feature of this device is its capability
to operate over the top with either or both of its inputs
above V+. The inputs handle 44V, both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring when the inputs are below
the negative supply. Protective resistors are included in
the input leads so that current does not become excessive
when the inputs are forced below the negative supply.
The LT1638/LT1639 can drive loads up to 25mA and still
maintain rail-to-rail capability. The op amps are unity-gain
stable and drive all capacitive loads up to 1000pF when
optional output compensation is used.
APPLICATIONS
n
n
n
n
n
Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
Micropower Active Filters
4mA to 20mA Transmitters
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.
TYPICAL APPLICATION
Output Voltage vs Input Voltage
Over-The-Top® Comparator with
100mV Hysteresis Centered at 0mV
10k
1M
VCC
VCC
1M
+
+
A
1/2 LT1638
B
1/2 LT1638
–
5V
VCC
V1
1M
V0
–
0V
10k
1M
1638/39 TA01
V2
VCC = 5V, VCM = 0V TO 44V, tPD = 27μs
20mV/DIV
1638/39 TA02
16389fg
1
LT1638/LT1639
ABSOLUTE MAXIMUM RATINGS (Note 1)
Total Supply Voltage (V + to V –) ................................44V
Input Differential Voltage...........................................44V
Input Current........................................................±25mA
Output Short-Circuit Duration (Note 2) .........Continuous
Operating Temperature Range (Note 3)
LT1638C/LT1639C ................................–40°C to 85°C
LT1638I/LT1639I ..................................–40°C to 85°C
LT1638H/LT1639H .............................–40°C to 125°C
Specified Temperature Range (Note 4)
LT1638C/LT1639C ................................–40°C to 85°C
LT1638I/LT1639I ..................................–40°C to 85°C
LT1638H/LT1639H .............................–40°C to 125°C
Junction Temperature .......................................... 150°C
DD Package ...................................................... 125°C
Storage Temperature Range...................–65°C to 150°C
DD Package .......................................–65°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
A
B
V+
OUT B
–IN B
+IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
OUT A
1
–IN A
2
+IN A
3
V–
V+
7
OUT B
6
–IN B
5
+IN B
A
B
4
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, θJA = 273°C/W
8
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 150°C/W (N8)
TJMAX = 150°C, θJA = 190°C/W (S8)
TOP VIEW
TOP VIEW
OUT A
1
8
V+
–IN A
2
7
OUT B
+IN A
3
6
–IN B
V–
4
5
+IN B
A
B
DD PACKAGE
8-LEAD (3mm s 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
UNDERSIDE METAL INTERNALLY CONNECTED TO V–
14 OUT D
OUT A
1
–IN A
2
+IN A
3
12 +IN D
V+
4
11 V –
+IN B
5
–IN B
6
9
–IN C
OUT B
7
8
OUT C
A
B
D
C
13 –IN D
10 +IN C
S PACKAGE
N PACKAGE
14-LEAD PDIP 14-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W (N)
TJMAX = 150°C, θJA = 160°C/W (S)
16389fg
2
LT1638/LT1639
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LT1638CMS8#PBF
LT1638CMS8#TRPBF
LTCY
8-Lead Plastic MSOP
–40°C to 85°C
LT1638IMS8#PBF
LT1638IMS8#TRPBF
LTCY
8-Lead Plastic MSOP
–40°C to 85°C
LT1638CDD#PBF
LT1638CDD#TRPBF
LAAL
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LT1638IDD#PBF
LT1638IDD#TRPBF
LAAL
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LT1638CN8#PBF
LT1638CN8#TRPBF
LT1638CN8
8-Lead PDIP
–40°C to 85°C
LT1638IN8#PBF
LT1638IN8#TRPBF
LT1638IN8
8-Lead PDIP
–40°C to 85°C
LT1638CS8#PBF
LT1638CS8#TRPBF
1638
8-Lead Plastic SO
–40°C to 85°C
LT1638IS8#PBF
LT1638IS8#TRPBF
1638I
8-Lead Plastic SO
–40°C to 85°C
LT1638HS8#PBF
LT1638HS8#TRPBF
1638H
8-Lead Plastic SO
–40°C to 125°C
LT1639CN#PBF
LT1639CN#TRPBF
LT1639CN
14-Lead PDIP
–40°C to 85°C
LT1639IN#PBF
LT1639IN#TRPBF
LT1639IN
14-Lead PDIP
–40°C to 85°C
LT1639CS#PBF
LT1639CS#TRPBF
LT1639CS
14-Lead Plastic SO
–40°C to 85°C
LT1639IS#PBF
LT1639IS#TRPBF
LT1639IS
14-Lead Plastic SO
–40°C to 85°C
LT1639HS#PBF
LT1639HS#TRPBF
LT1639HS
14-Lead Plastic SO
–40°C to 125°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/
16389fg
3
LT1638/LT1639
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
LT1638C/LT1639C, LT1638I/LT1639I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1638 N, S Packages
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1639 N, S Packages
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638 MS8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638 DD Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638/LT1639 N, S Packages
LT1638MS8, LT1638DD
VCM = 44V (Note 5)
Input Offset Voltage Drift
(Note 9)
IOS
Input Offset Current
IB
Input Bias Current
VCM = 44V (Note 5)
VS = 0V
UNITS
200
600
850
950
μV
μV
μV
300
700
950
1050
μV
μV
μV
350
900
1150
1450
μV
μV
μV
400
1100
1350
1450
μV
μV
μV
l
l
2
2.5
6
7
l
l
1
6
2.5
nA
μA
l
l
20
8
0.1
50
30
nA
μA
nA
μV/°C
μV/°C
Input Noise Voltage
0.1Hz to 10Hz
1
μVP-P
en
Input Noise Voltage Density
f = 1kHz
20
nV/√Hz
in
Input Noise Current Density
f = 1kHz
RIN
Input Resistance
Differential
Common Mode, VCM = 0V to 44V
CIN
Input Capacitance
l
0
CMRR
Common Mode Rejection Ratio
VCM = 0V to VCC – 1V
VCM = 0V to 44V (Note 8)
l
l
88
80
98
88
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
8
450
mV
mV
VS = 5V, No Load
VS = 5V, ISINK = 10mA
l
l
3
500
8
700
mV
mV
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
l
l
2.94
2.25
2.98
2.40
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
l
l
4.94
3.8
4.98
4.0
V
V
VS = 3V, Short to GND
VS = 3V, Short to VCC
10
15
15
25
mA
mA
VS = 5V, Short to GND
VS = 5V, Short to VCC
15
15
20
25
mA
mA
Input Voltage Range
VOL
VOH
ISC
Output Voltage Swing Low
Output Voltage Swing High
Short-Circuit Current (Note 2)
1
1.4
0.3
pA/√Hz
2.5
5.5
MΩ
MΩ
5
pF
44
V
dB
dB
16389fg
4
LT1638/LT1639
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
LT1638C/LT1639C, LT1638I/LT1639I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
PSRR
Power Supply Rejection Ratio
VS = 3V to 12.5V, VCM = VO = 1V
l
90
100
dB
Reverse Supply Voltage
IS = – 100μA per Amplifier
l
18
27
V
l
Minimum Operating Supply Voltage
UNITS
2.4
2.7
V
170
230
275
μA
μA
IS
Supply Current per Amplifier
(Note 6)
GBW
Gain Bandwidth Product
(Note 5)
f = 5kHz
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
650
550
500
1075
kHz
kHz
kHz
SR
Slew Rate
(Note 7)
AV = – 1, RL = ∞
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
0.210
0.185
0.170
0.38
V/μs
V/μs
V/μs
l
The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C.
VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)
LT1638C/LT1639C, LT1638I/LT1639I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1638 N, S Packages
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1639 N, S Packages
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638 MS8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638 DDPackage
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
LT1638/LT1639 N, S Packages
LT1638MS8, LT1638DD
Input Offset Voltage Drift
(Note 9)
IOS
Input Offset Current
IB
Input Bias Current
UNITS
250
800
1000
1100
μV
μV
μV
350
900
1100
1200
μV
μV
μV
400
1050
1250
1550
μV
μV
μV
450
1250
1450
1550
μV
μV
μV
l
l
2
2.5
6
7
μV/°C
μV/°C
l
1
6
nA
l
20
50
nA
Input Noise Voltage
0.1Hz to 10Hz
1
μVP-P
en
Input Noise Voltage Density
f = 1kHz
20
nV/√Hz
in
Input Noise Current Density
f = 1kHz
RIN
Input Resistance
Differential
Common Mode, VCM = – 15V to 14V
CIN
Input Capacitance
1
0.3
pA/√Hz
2.5
500
MΩ
MΩ
4.5
pF
l
–15
CMRR
Common Mode Rejection Ratio
VCM = –15V to 29V
l
80
88
dB
AVOL
Large-Signal Voltage Gain
VO = ± 14V, RL = 10k
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
200
125
100
500
V/mV
V/mV
V/mV
VO
Output Voltage Swing
No Load
IOUT = ±10mA
l
l
±14.9
±13.7
±14.95
±14.0
Input Voltage Range
29
V
V
V
16389fg
5
LT1638/LT1639
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified temperature
range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = OV, VOUT = OV, unless otherwise noted. (Note 4)
LT1638C/LT1639C, LT1638I/LT1639I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
ISC
Short-Circuit Current (Note 2)
Short to GND
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
UNITS
PSRR
Power Supply Rejection Ratio
VS = ± 1.5V to ±22V
IS
Supply Current per Amplifier
GBW
Gain Bandwidth Product
f = 5kHz
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
750
650
600
1200
kHz
kHz
kHz
SR
Slew Rate
AV = – 1, RL = ∞, VO = ±10V
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
l
l
0.225
0.2
0.18
0.4
V/μs
V/μs
V/μs
l
l
25
20
15
40
mA
mA
mA
l
90
100
dB
205
l
280
350
μA
μA
The l denotes the 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 specified. (Note 4)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1638S8
LT1639S
MIN
l
l
LT1638H/LT1639H
TYP
MAX
UNITS
200
650
3
μV
mV
300
750
3.2
μV
mV
Input Offset Voltage Drift (Note 9)
l
15
μV/°C
IOS
Input Offset Current
VCM = 44V (Note 5)
l
l
15
10
nA
μA
IB
Input Bias Current
VCM = 44V (Note 5)
l
l
150
100
nA
μA
44
V
Input Voltage Range
CMRR
Common Mode Rejection Ratio
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
l
0.3
l
l
76
72
l
200
20
1500
V/mV
V/mV
l
400
35
1500
V/mV
V/mV
dB
dB
VOL
Output Voltage Swing Low
No Load
ISINK = 5mA
VS = 5V, ISINK = 10mA
l
l
l
VOH
Output Voltage Swing High
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
l
l
2.9
2
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
l
l
4.9
3.5
V
V
VS = 3V to 12.5V, VCM = VO = 1V
l
80
dB
l
2.7
V
l
18
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
IS = – 100μA
IS
Supply Current
(Note 6)
GBW
Gain Bandwidth Product
(Note 5)
f = 5kHz
SR
Slew Rate
(Note 7)
AV = – 1, RL = ∞
15
900
1500
V
170
l
mV
mV
mV
230
450
μA
μA
l
650
350
1075
kHz
kHz
l
0.21
0.1
0.38
V/μs
V/μs
16389fg
6
LT1638/LT1639
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C, otherwise
specifications are at TA = 25°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1638S8
LT1639S
MIN
l
l
LT1638H/LT1639H
TYP
MAX
UNITS
250
850
3.4
μV
mV
350
950
3.6
μV
mV
15
μV/°C
Input Offset Voltage Drift (Note 9)
l
IOS
Input Offset Current
l
25
nA
IB
Input Bias Current
l
250
nA
l
72
l
200
15
No Load
IOUT = ± 5mA
IOUT = ±10mA
l
l
l
±14.8
±14
±13.4
V
V
V
VS = ±1.5V to ±22V
l
84
dB
l
±1.35
V
CMRR
Common Mode Rejection Ratio
VCM = – 14.7V to 29V
AVOL
Large-Signal Voltage Gain
VO = ±14V, RL = 10k
VO
Output Voltage Swing
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
IS
Supply Current
GBW
Gain Bandwidth Product
f = 5kHz
SR
Slew Rate
AV = –1, RL = ∞, VO = ±10V,
Measured at VO = ±5V
205
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.
Note 3: The LT1638C/LT1639C and LT1638I/LT1639I are guaranteed
functional over the operating temperature range of –40°C to 85°C The
LT1638H/LT1639H are guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 4: The LT1638C/LT1639C are guaranteed to meet specified
performance from 0°C to 70°C and are designed, characterized and
expected to meet specified performance from –40°C to 85°C but not
dB
500
V/mV
V/mV
280
550
μA
μA
l
750
400
1200
kHz
kHz
l
0.225
0.1
0.4
V/μs
V/μs
tested or QA sampled at these temperatures. The LT1638I/LT1639I are
guaranteed to meet specified performance from –40°C to 85°C. The
LT1638H/LT1639H are guaranteed to meet specified performance from
–40°C to 125°C.
Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and
VS = ±15V or VS = ±22V tests.
Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and
VS = ±15V or VS = ±22V tests.
Note 7: Guaranteed by correlation to slew rate at VS = ±15V, and GBW at
VS = 3V and VS = ±15V tests.
Note 8: This specification implies a typical input offset voltage of 2mV at
VCM = 44V and a maximum input offset voltage of 5mV at VCM = 44V.
Note 9: This parameter is not 100% tested.
16389fg
7
LT1638/LT1639
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
280
TA = 125°C
240
220
TA = 25°C
200
180
TA = –55°C
160
140
120
10000
300
8000
200
6000
100
0
TA = 125°C
5
10
15 20 25 30 35
SUPPLY VOLTAGE (V)
40
TA = –55°C
–200
–300
–400
0
TA = 25°C
–100
45
0
1
3
4
2
TOTAL SUPPLY VOLTAGE (V)
Output Saturation Voltage vs
Load Current (Output High)
OUTPUT SATURATION VOLTAGE (V)
OUTPUT SATURATION VOLTAGE (V)
TA = 125°C
TA = 25°C
TA = –55°C
0.01
0.1
1
SOURCING LOAD CURRENT (mA)
10
TA = 125°C
TA = 25°C
0.01
TA = –55°C
0.001
0.001
0.01
0.1
1
SINKING LOAD CURRENT (mA)
10
OUTPUT LOW
9
10
1638/39 G07
0 10 20 30 40 50 60 70 80 90 100
INPUT OVERDRIVE (mV)
1638/39 G06
Input Noise Current Density
vs Frequency
4.5
INPUT NOISE CURRENT DENSITY (pA/√Hz)
INPUT NOISE VOLTAGE DENSITY (nV/√Hz)
NOISE VOLTAGE (400nV/DIV)
8
OUTPUT HIGH
1638/39 G05
60
50
40
30
20
10
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
7
44
VS = ±2.5V
NO LOAD
1
10
70
4 5 6
TIME (SEC)
4.4
5.2
5.6
4.8
COMMON MODE VOLTAGE (V)
1638/39 G03
Noise Voltage Density vs
Frequency
VS = p2.5
3
TA = 25°C
100
0.1
0.1Hz to 10Hz Noise Voltage
2
TA = 125°C
0
Output Saturation Voltage vs
Input Overdrive
VS = ±2.5V
VOD = 30mV
1638/39 G04
1
20
–40
4.0
5
1
VS = ±2.5V
VOD = 30mV
0
40
Output Saturation Voltage vs
Load Current (Output Low)
1
0.01
0.001
TA = –55°C
60
1638/39 G02
1638/39 G01
0.1
VS = 5V, 0V
–20
OUTPUT SATURATION VOLTAGE (mV)
100
400
INPUT BIAS CURRENT (nA)
CHANGE IN INPUT OFFSET VOLTAGE (μV)
SUPPLY CURRENT PER AMPLIFIER (μA)
300
260
Input Bias Current vs
Common Mode Voltage
Minimum Supply Voltage
1
10
100
FREQUENCY (Hz)
1k
1638/39 G09
1
10
100
FREQUENCY (Hz)
1k
1638/39 G08
16389fg
8
LT1638/LT1639
TYPICAL PERFORMANCE CHARACTERISTICS
Gain and Phase Shift vs
Frequency
Gain Bandwidth Product vs
Temperature
80
50
70
40
60
50
GAIN
20
40
10
30
0
20
1200
1100
1000
10
–10
10
100
FREQUENCY (kHz)
1
–25
50
0
75
25
TEMPERATURE (°C)
30
20
1100
10 15 20 25 30 35 40
TOTAL SUPPLY VOLTAGE (V)
GAIN BANDWIDTH PRODUCT (kHz)
GAIN BANDWIDTH PRODUCT (kHz)
GAIN BANDWIDTH
5
10
45
VS = ±2.5V
AV = –1
RF = RG = 100k
f = 1kHz
1400
1300
PHASE MARGIN
50
25
0
75
TEMPERATURE (°C)
–25
90
50
1100
20
1000
10
900
0
800
–10
100
10
LOAD RESISTANCE (kΩ)
VS = ±2.5V
80
70
60
POSITIVE SUPPLY
50
40
30
NEGATIVE SUPPLY
20
10
0
–10
1
10
100
FREQUENCY (kHz)
1638/39 G17
CMRR vs Frequency
1000
1638/39 G16
Output Impedance vs Frequency
Channel Separation vs Frequency
10k
130
VS = ±15V
125
PSRR vs Frequency
30
GAIN BANDWIDTH
PRODUCT
100
1638/39 G14
60
1200
1
120
VS = ±2.5V
VS = ±15V
90
80
70
60
50
40
OUTPUT IMPEDANCE (Ω)
120
100
CHANNEL SEPARATION (dB)
COMMON MODE REJECTION RATIO (dB)
0.35
0.25
–50
125
40
1638/39 G15
110
100
PHASE MARGIN (DEG)
40
PHASE MARGIN (DEG)
PHASE MARGIN
1300
FALLING, VS = ±2.5V
0.30
1500
50
1400
0
0.40
Gain Bandwidth Product and
Phase Margin vs Load Resistance
60
1000
RISING, VS = ±2.5V
0.45
1638/39 G13
Gain Bandwidth Product and
Phase Margin vs Supply Voltage
1200
0.50
FALLING, VS = ±15V
900
1638/39 G12
1500
RISING, VS = ±15V
VS = ±2.5V
800
–50
0
1000
–20
VS = ±15V
POWER SUPPLY REJECTION RATIO (dB)
30
0.55
1300
PHASE SHIFT (DEG)
PHASE
GAIN (dB)
1400
SLEW RATE (V/μs)
60
0.60
f = 1kHz
90
GAIN BANDWIDTH PRODUCT (kHz)
VS = ±2.5V
70
Slew Rate vs Temperature
1500
100
80
110
100
90
80
1k
100
AV = 10
AV = 100
10
AV = 1
1
70
30
20
1
10
100
FREQUENCY (kHz)
1000
1638/39 G18
60
0.1
1
10
FREQUENCY (kHz)
100
1638/39 G19
0.1
0.1
1
10
100
FREQUENCY (kHz)
1000
1638/39 G20
16389fg
9
LT1638/LT1639
TYPICAL PERFORMANCE CHARACTERISTICS
Settling Time to 0.1% vs
Output Step
100
VS = ±15V
8
80
AV = –1
4
OVERSHOOT (%)
2
0
–2
–4
AV = –1
–6
60
AV = 5
AV = 1
40
30
AV = 10
20
AV = 1
–8
70
50
0
5
10
100
1000
CAPACITIVE LOAD (pF)
Total Harmonic Distortion + Noise
vs Frequency
THD + NOISE (%)
THD + NOISE (%)
0.1
100
Total Harmonic Distortion + Noise
vs Output Voltage
RL = 10k, f = 1kHz
VCM = HALF SUPPLY
AV = –1, VS = ±1.5V
AV = –1, VS = 3V, 0V
AV = 1, VS = ±1.5V
AV = 1, VS = 3V, 0V
1
VS = ±1.5V
VIN = ±1V
0.1
VS = 3V, 0V
VIN = 0.5V TO 2.5V
0.01
0.1
0.01
VS = 3V, 0V
VIN = 0.2V TO 2.2V
1
10
FREQUENCY (kHz)
100
0.001
0.1
0.001
1
10
LOAD RESISTANCE TO GROUND (kΩ)
1638/39 G24
Open-Loop Gain
CHANGE IN INPUT OFFSET VOLTAGE (50μV/DIV)
1
10
FREQUENCY (kHz)
1638/39 G23
VS = 3V TOTAL
AV = 1
VIN = 2VP-P AT 1kHz
AV = 1
0.001
0.01
10000
1
AV = –1
VS = ±2.5V
10
10
VS = 3V, 0V
VOUT = 2VP-P
VCM = 1.2V
RL = 20k
0.01
10
Total Harmonic Distortion + Noise
vs Load Resistance
10
0.1
15
1638/39 G22
1638/39 G21
1
20
0
0.1
0
35
30
20
15
10
25
SETTLING TIME (μs)
DISTORTION ≤ 1%
RL = 20k
25
5
10
–10
VS = ±15V
30
THD + NOISE (%)
OUTPUT STEP (V)
90
AV = 1
6
35
VS = 5V, 0V
VCM = 2.5V
ISOURCE = 150μA
OUTPUT SWING (VP-P)
10
Undistorted Output Swing
vs Frequency
Capacitive Load Handling,
Overshoot vs Capacitive Load
100
0
2
1
OUTPUT VOLTAGE (VP-P)
1638/39 G26
1638/39 G25
Large-Signal Response
3
Small-Signal Response
VS = ±15V
RL = 2k
RL = 10k
RL = 50k
VS = ±15V
AV = 1
–20V
–10V
10V
0V
OUTPUT VOLTAGE (5V/DIV)
1638/39 G28
VS = ±15V
AV = 1
CL = 15pF
1638/39 G29
20V
1638/39 G27
16389fg
10
LT1638/LT1639
APPLICATIONS INFORMATION
Supply Voltage
The positive supply pin of the LT1638/LT1639 should be
bypassed with a small capacitor (typically 0.1μF) 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 LT1638/LT1639 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 LT1638/LT1639 can be shut down by removing V +.
In this condition the input bias current is less than 0.1nA,
even if the inputs are 44V above the negative supply.
When operating the LT1638/LT1639 on total supplies of
10V or more, the supply must not be brought up faster
than 1V/μs. Increasing the bypass capacitor and/or adding a small resistor in series with the supply will limit the
rise time.
Inputs
The LT1638/LT1639 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
–20nA. When the input common mode voltage is within
0.5V of the positive rail, the NPN stage is operating and
the input bias current is typically 40nA. Increases in temperature will cause the voltage at which operation switches
from the PNP input stage to the NPN input 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
allow the LT1638/LT1639 to operate over the top, with
either or both of its inputs above V+. At about 0.3V above
V+ the NPN input transistor is fully saturated and the
input bias current is typically 8μA at room temperature.
The input offset voltage is typically 2mV when operating
above V+. The LT1638/LT1639 will operate with its inputs
44V above V – regardless of V +.
The inputs are protected against excursions of 2V below
V – by an internal 1k resistor in series with each input and
a diode from the input to the negative supply. If the inputs
can go more than 2V below V –, an additional external
resistor is required. A 10k resistor will protect the input
against excursions as much as 10V below V –. The input
stage of the LT1638/LT1639 incorporates phase reversal
protection to prevent the output from phase reversing for
inputs below V –. There are no clamping diodes between
the inputs and the maximum differential input voltage is
44V.
Output
The output of the LT1638/LT1639 can swing within 20mV
of the positive rail with no load, and within 3mV of the
negative rail with no load. When monitoring voltages
within 20mV of the positive rail or within 3mV of the
negative rail, gain should be taken to keep the output from
clipping. The LT1638/LT1639 are capable of sinking and
sourcing over 40mA on ± 15V supplies; sourcing current
capability is reduced to 20mA at 5V total supplies as noted
in the electrical characteristics.
The LT1638/LT1639 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 1000pF,
at all output currents.
Optional Output Compensation for
Capacitive Loads Greater than 200pF
VIN
+
LT1638
–
1000pF
0.22μF
150Ω
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
16389fg
11
LT1638/LT1639
APPLICATIONS INFORMATION
nonlinear common mode rejection. If the op amp is
operating inverting there is no common mode induced
distortion. If the op amp is operating in the PNP input
stage (input is not within 0.8V of V +), the CMRR is very
good, typically 98dB. When the LT1638 switches 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 LT1638/LT1639 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.
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes performance in single supply applications where the load is
returned to ground. The typical performance curve of
Open-Loop Gain for various loads shows the details.
TYPICAL APPLICATIONS
VCC
R5
100k
With 1.2MHz bandwidth, Over-The-Top capability, reversebattery protection and rail-to-rail input and output features,
the LT1638/LT1639 are ideal candidates for general purpose
applications.
The lowpass slope limiting filter in Figure 1 limits the
maximum dV/dT (not frequency) that it passes. When the
input signal differs from the output by one forward diode
drop, D1 or D2 will turn on. With a diode on, the voltage
across R2 will be constant and a fixed current, VDIODE/R2,
will flow through capacitor C1, charging it linearly instead
of exponentially. The maximum slope that the circuit will
pass is equal to VDIODE divided by (R2)(C1). No matter
how fast the input changes the output will never change
any faster than the dV/dT set by the diodes and (R2)(C).
+
1/4 LT1639
D1 R3
100k
–
R1
1k
R4
100k
D3
D2
VOUT
1/4 LT1639
R2
+
VIN
C1
LT1634-1.2V
D4
–
1/4 LT1639
FOR R2 = 50k, C1 = 500pF,
MAXIMUM SLOPE = 0.048V/μs
1.2V
d
=
V
dt OUT (R2)(C1)
D1
LT1634-1.2V
–
D2
+
R6
100k
1638/39 F02
D1 TO D4 = IN4148
VIN
R1
VD
d
=
V
dt OUT(MAX) (R2)(C1)
FOR R1 = 10k, R2 = 100k, C1 = 1000pF
d
V
= 0.006V/μs
dt OUT(MAX)
R2
+
C1 1/2 LT1638
VEE
Response of Slope Limiting Filter
VOUT
–
1638/39 F01
VOUT
Figure 1. Lowpass Slope Limiting Filter
A modification of this application is shown in Figure 2 using
references instead of diodes to set the maximum slope. By
using references, the slope is independent of temperature.
A scope photo shows a 1VP-P, 2kHz input signal with a 2V
pulse added to the sine wave; the circuit passes the 2kHz
signal but limits the slope of the pulse.
VIN
1638/39 TA02
Figure 2. Lowpass Slope Limiting Filter with 0 TC
16389fg
12
LT1638/LT1639
TYPICAL APPLICATIONS
The application in Figure 3 utilizes the Over-The-Top
capabilities of the LT1638. The 0.2Ω resistor senses the
load current while the op amp and NPN transistor form a
closed loop making the collector current of Q1
proportional to the load current. As a convenient monitor,
the 2k load resistor converts the current into a voltage. The
positive supply rail, V +, is not limited to the 5V supply of
the op amp and could be as high as 44V.
The Figure 4 application uses the LT1638 in conjunction
with the LT1634 micropower shunt reference. The supply
current of the op amp also biases the reference. The drop
across resistor R1 is fixed at 1.2V generating an output
current equal to 1.2V/R1.
V+
200Ω
VCC
LT1634-1.2
5V
0.2Ω
R1
+
200Ω
Q1
2N3904
1/2 LT1638
–
+
0V TO 4.3V
IOUT = 1.2V
R1
1/2 LT1638
2k
ILOAD
LOAD
VCC
–
IOUT
1638/39 F03
VOUT = (2Ω)(ILOAD)
1638/39 F04
Figure 3. Positive Supply Rail Current Sense
Figure 4. Current Source
SIMPLIFIED SCHEMATIC
V+
Q2
Q1
D1
R1
6k
Q3
D2
Q22
D3
R2
1k
Q4
Q19
–IN
Q17
Q7
R3
1k
+
10μA
Q11
OUT
+IN
Q6
Q20
Q12
Q16
Q18
Q15
Q9
Q5
Q8
D4
D5
Q10
Q13
Q14
R4
8k
Q21
R5
8k
V–
ONE AMPLIFIER
1638/39 SS
16389fg
13
LT1638/LT1639
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
R = 0.125
TYP
5
0.40 p 0.10
8
0.70 p0.05
3.5 p0.05
1.65 p0.05
2.10 p0.05 (2 SIDES)
3.00 p0.10
(4 SIDES)
PACKAGE
OUTLINE
1.65 p 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
(DD8) DFN 0509 REV C
0.75 p0.05
0.200 REF
0.25 p 0.05
4
0.25 p 0.05
1
0.50 BSC
0.50
BSC
2.38 p0.05
2.38 p0.10
BOTTOM VIEW—EXPOSED PAD
0.00 – 0.05
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 p 0.102
(.118 p .004)
(NOTE 3)
0.889 p 0.127
(.035 p .005)
0.254
(.010)
8
7 6 5
3.00 p 0.102
(.118 p .004)
(NOTE 4)
4.90 p 0.152
(.193 p .006)
DETAIL “A”
0.52
(.0205)
REF
0o – 6o TYP
GAUGE PLANE
5.23
(.206)
MIN
1
3.20 – 3.45
(.126 – .136)
0.53 p 0.152
(.021 p .006)
DETAIL “A”
0.42 p 0.038
(.0165 p .0015)
TYP
0.65
(.0256)
BSC
1.10
(.043)
MAX
2 3
4
0.86
(.034)
REF
0.18
(.007)
RECOMMENDED SOLDER PAD LAYOUT
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
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.1016 p 0.0508
(.004 p .002)
MSOP (MS8) 0307 REV F
16389fg
14
LT1638/LT1639
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
.300 – .325
(7.620 – 8.255)
+.035
.325 –.015
8.255
+0.889
–0.381
6
5
1
2
3
4
.120
(3.048) .020
MIN (0.508)
MIN
.018 ± .003
.100
(2.54)
BSC
)
7
.255 ± .015*
(6.477 ± 0.381)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
(
.130 ± .005
(3.302 ± 0.127)
.045 – .065
(1.143 – 1.651)
8
N8 1002
(0.457 ± 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
16389fg
15
LT1638/LT1639
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)
.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 1103
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
NOTE:
1. DIMENSIONS IN
.010 – .020
s 45°
(0.254 – 0.508)
INCHES
.008 – .010
(MILLIMETERS)
(0.203 – 0.254)
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
5
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
7
.004 – .010
(0.101 – 0.254)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
6
.050
(1.270)
BSC
S14 0502
16389fg
16
LT1638/LT1639
REVISION HISTORY
(Revision history begins at Rev E)
REV
DATE
DESCRIPTION
PAGE NUMBER
E
06/10
Updates to Supply Voltage section
11
F
09/10
Units on x-axis of G24 changed from Hz to kHz
10
G
10/11
Updated θJA values for MS8 and DD packages in Pin Configuration
2
Corrected part numbers and revised column title to Specified Temperature Range in Order Information
3
Deleted Note 10 from Electrical Characteristics
7
16389fg
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
LT1638/LT1639
TYPICAL APPLICATION
The battery monitor in Figure 5 also demonstrates the
LT1638’s ability to operate with its inputs above the
positive rail. In this application, a conventional amplifier
would be limited to a battery voltage between 5V and
ground, but the LT1638 can handle battery voltages as
high as 44V. When the battery is charging, Amp B senses
the voltage drop across RS. The output of Amp B causes
Q2 to drain sufficient current through RB to balance the
input of Amp B. Likewise, Amp A and Q1 form a closed
CHARGER
VOLTAGE
RS, 0.2Ω
RA, 2k
IBATT
RA', 2k
loop when the battery is discharging. The current through
Q1 or Q2 is proportional to the current in RS and this current flows into RG and is converted into a voltage. Amp
D buffers and amplifies the voltage across RG. Amp C
compares the output of Amp A and Amp B to determine
the polarity of current through RS. The scale factor for
VOUT with S1 open is 1V/A. With S1 closed the scale
factor is 1V/100mA and currents as low as 500μA can
be measured.
Q1
2N3904
+
A
1/4 LT1639
+
C
1/4 LT1639
–
LOGIC
–
RB, 2k
RB', 2k
LOAD
+
+
Q2
2N3904
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
B
1/4 LT1639
+
–
RG
10k
VBATT = 12V
D
1/4 LT1639
VOUT
–
S1
10k
90.9k
1638/39 F05
IBATT =
VOUT
V
= OUT AMPS
(RS)(RG/RA)(GAIN) GAIN
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
RA = RB
VS = 5V, 0V
Figure 5. Battery Monitor
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1078/LT1079
LT2078/LT2079
Dual/Quad 55μA Max, Single Supply, Precision Op Amps
Input/Output Common Mode Includes Ground, 70μV VOS(MAX)
and 2.5μV/°C Drift (Max), 200kHz GBW, 0.07V/μs Slew Rate
LT1178/LT1179
LT2178/LT2179
Dual/Quad 17μA Max, Single Supply, Precison Op Amps
Input/Output Common Mode Includes Ground, 70μV VOS(MAX)
and 4μV/°C Drift (Max), 85kHz GBW, 0.04V/μs Slew Rate
LT1366/LT1367
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
475μV VOS(MAX), 500V/mV AVOL(MIN), 400kHz GBW
LT1490/LT1491
Dual/Quad Over-The-Top Micropower, Rail-to-Rail Input and
Output Op Amps
Single Supply Input Range: – 0.4V to 44V, Micropower 50μA
per Amplifier, Rail-to-Rail Input and Output, 200kHz 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
16389fg
18 Linear Technology Corporation
LT 1011 REV G • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1998
工商网监
湘ICP备2023018690号
