LT1782IS5#TR [Linear]
LT1782 - Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C;
| 型号： | LT1782IS5#TR |
| 厂家： | 
Linear |
| 描述： | LT1782 - Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C 放大器 光电二极管 |
| 文件： | 总16页 (文件大小：177K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
DESCRIPTION
FEATURES
The LT®1782 is a 200kHz op amp available in the small
SOT-23 package that operates on all single and split sup-
plies with a total voltage of 2.5V to 18V. The amplifier
drawslessthan55μAofquiescentcurrentandhasreverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
+
n
Operates with Inputs Above V
Rail-to-Rail Input and Output
n
n
Micropower: 55μA Supply Current Max
Operating Temperature Range: –40°C to 125°C
Low Profile (1mm) ThinSOT™ Package
Low Input Offset Voltage: 800μV Max
Single Supply Input Range: 0V to 18V
High Output Current: 18mA Min
Specified on 3V, 5V and 5V Supplies
Output Shutdown on 6-Lead Version
Reverse Battery Protection to 18V
High Voltage Gain: 1500V/mV
n
n
n
n
n
n
n
n
n
n
n
The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-Top™ opera-
tion capability with either or both of its inputs above the
positive rail. The inputs handle 18V both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring even when the inputs are 9V
below the negative supply.
Gain Bandwidth Product: 200kHz
Slew Rate: 0.07V/μs
The LT1782 can drive loads up to 18mA and still maintain
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
impedance and reducing quiescent current to 5μA. The
LT1782 op amp is available in the 5- and 6-lead SOT-23
packages. For applications requiring higher speed, refer
to the LT1783.
APPLICATIONS
n
Portable Instrumentation
n
Battery- or Solar-Powered Systems
n
Sensor Conditioning
n
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT and Over-The-Top are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
n
n
4mA to 20mA Transmitters
TYPICAL APPLICATION
Positive Supply Rail Current Sense
Distribution of Input Offset Voltage
25
+
V
V
= 5V, 0V
= 2.5V
S
V
5V TO 18V
CM
200Ω
20
15
10
5
5V
0.2Ω
+
MMBT3904
LT1782
200Ω
V
= 2Ω(I
)
LOAD
–
OUT
0V TO 4.3V
I
2k
LOAD
LOAD
1782 TA01a
0
–900 –600 –300
0
300
600
900
INPUT OFFSET VOLTAGE (μV)
1782 TA01b
1782fb
1
LT1782
(Note 1)
ABSOLUTE MAXIMUM RATINGS
+
–
Total Supply Voltage (V to V )................................ 18V
Specified Temperature Range (Note 4)
Input Differential Voltage.......................................... 18V
LT1782C...............................................–40°C to 85°C
LT1782I................................................–40°C to 85°C
LT1782H ............................................–40°C to 125°C
Junction Temperature........................................... 150°C
Storage Temperature Range...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
–
Input Pin Voltage to V ................................ + 24V/–10V
–
Shutdown Pin Voltage Above V ............................. 18V
Shutdown Pin Current ........................................ 10mA
Output Short-Circuit Duration (Note 2) ........... Indefinite
Operating Temperature Range (Note 3)
LT1782C...............................................–40°C to 85°C
LT1782I................................................–40°C to 85°C
LT1782H ............................................–40°C to 125°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
+
+
V
1
2
3
5
4
OUT 1
–
6
5
4
OUT
V
–
SHDN
–IN
V
V
2
+IN
–IN
+IN 3
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
= 150°C, θ = 250°C/W
T = 150°C, θ = 230°C/W
JMAX JA
JMAX
JA
ORDER INFORMATION
LEAD FREE FINISH
LT1782CS5#PBF
LT1782IS5#PBF
LT1782HS5#PBF
LT1782CS6#PBF
LT1782IS6#PBF
LT1782HS6#PBF
TAPE AND REEL
PART MARKING
LTLD
PACKAGE DESCRIPTION
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
SPECIFIED TEMPERATURE RANGE
LT1782CS5#TRPBF
LT1782IS5#TRPBF
LT1782HS5#TRPBF
LT1782CS6#TRPBF
LT1782IS6#TRPBF
LT1782HS6#TRPBF
0°C to 70°C
LTLE
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTXK
LTIS
LTIT
–40°C to 85°C
–40°C to 125°C
LTXL
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
1782fb
2
LT1782
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part
VPIN5 = 0V, pulse power tested unless otherwise specified.
LT1782C/LT1782I
SYMBOL
PARAMETER
CONDITIONS
T = 25°C
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
400
800
950
1100
μV
μV
μV
OS
A
l
l
0°C ≤ T ≤ 70°C
A
–40°C ≤ T ≤ 85°C
A
l
Input Offset Voltage Drift (Note 7)
Input Offset Current
2
5
μV/°C
ΔV /ΔT
OS
l
l
I
OS
0.7
2
1
nA
μA
V
V
= 18V (Note 5)
= 18 (Note 5)
CM
CM
l
l
I
Input Bias Current
8
6
0.1
15
12
nA
μA
nA
B
SHDN or V = 0V, V = 0V to 18V
S
CM
l
Input Bias Current Drift
Input Noise Voltage
–40°C ≤ T ≤ 85°C
0.01
1
nA/°C
A
0.1Hz to 10Hz
f = 1kHz
μV
P-P
e
n
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
50
nV/√Hz
pA/√Hz
i
n
f = 1kHz
0.05
l
l
R
IN
Differential
3.4
1.5
6.5
5
3
Mꢀ
Gꢀ
Mꢀ
Common Mode, V = 0V to (V – 1V)
CM
CC
Common Mode, V = 0V to 18V
CM
C
IN
Input Capacitance
5
pF
V
l
Input Voltage Range
0
18
CMRR
PSRR
Common Mode Rejection Ratio
(Note 5)
V
V
= 0V to V – 1V
l
l
90
68
100
80
dB
dB
CM
CM
CC
= 0V to 18V (Note 8)
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V = 3V to 12.5V, V = V = 1V
l
90
100
dB
S
CM
O
A
VOL
V = 3V, V = 500mV to 2.5V, R = 10k
200
133
100
1500
V/mV
V/mV
V/mV
S
S
S
O
L
V = 3V, 0°C ≤ T ≤ 70°C
l
l
A
V = 3V, –40°C ≤ T ≤ 85°C
A
V = 5V, V = 500mV to 4.5V, R = 10k
400
250
200
500
V/mV
V/mV
V/mV
S
O
L
V = 5V, 0°C ≤ T ≤ 70°C
l
l
S
A
V = 5V, –40°C ≤ T ≤ 85°C
S
A
l
l
l
V
V
Output Voltage Swing LOW
Output Voltage Swing HIGH
No Load
3
8
500
800
mV
mV
mV
OL
I
= 5mA
200
400
SINK
V = 5V, I
= 10mA
SINK
S
l
l
V = 3V, No Load
2.91
2.6
2.94
2.8
V
V
OH
S
V = 3V, I
= 5mA
SOURCE
S
l
l
V = 5V, No Load
S
4.91
4.5
4.94
4.74
V
V
S
V = 5V, I
= 10mA
SOURCE
I
I
Short-Circuit Current (Note 2)
V = 3V, Short to GND
5
10
30
mA
mA
SC
S
V = 3V, Short to V
15
S
CC
V = 5V, Short to GND
15
20
30
40
mA
mA
S
V = 5V, Short to V
S
CC
l
l
Minimum Supply Voltage
Reverse Supply Voltage
2.7
18
V
V
I = –100μA
S
Supply Current
(Note 6)
40
5
55
60
65
μA
μA
μA
S
0°C ≤ T ≤ 70°C
l
l
A
–40°C ≤ T ≤ 85°C
A
l
Supply Current, SHDN
V
PIN5
= 2V, No Load (Note 10)
15
μA
1782fb
3
LT1782
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part
VPIN5 = 0V, pulse power tested unless otherwise specified.
LT1782C/LT1782I
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
I
Shutdown Pin Current
V
PIN5
V
PIN5
V
PIN5
= 0.3V, No Load (Note 10)
= 2V, No Load (Note 10)
= 5V, No Load (Note 10)
0.5
2
5
nA
μA
μA
SHDN
8
l
l
l
l
Shutdown Output Leakage Current
Maximum Shutdown Pin Current
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
V
V
= 2V, No Load (Note 10)
= 18V, No Load (Note 10)
0.05
10
1
μA
μA
V
PIN5
PIN5
30
0.3
V
V
(Note 10)
(Note 10)
L
2
V
H
t
t
V
PIN5
V
PIN5
= 5V to 0V, R = 10k (Note 10)
100
6
μs
μs
ON
OFF
L
Turn-Off Time
= 0V to 5V, R = 10k (Note 10)
L
GBW
Gain Bandwidth Product
(Note 5)
f = 5kHz
0°C ≤ T ≤ 70°C
110
100
90
200
kHz
kHz
kHz
l
l
A
–40°C ≤ T ≤ 85°C
A
SR
Slew Rate
(Note 5)
A = –1, R = ∞
0.035
0.031
0.028
0.07
V/μs
V/μs
V/μs
V
L
l
l
0°C ≤ T ≤ 70°C
A
–40°C ≤ T ≤ 85°C
A
t
Settling Time
45
0.003
11
μs
%
V = 5V, ΔV
= 2V to 0.1%, A = –1
V
S
S
OUT
THD
Distortion
V = 3V, V = 2V , A = 1, R = 10k, f = 1kHz
S
O
P-P
V
L
FPBW
Full-Power Bandwidth (Note 9)
V
OUT
= 2V
kHz
P-P
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified.
LT1782C/LT1782I
SYMBOL
PARAMETER
CONDITIONS
T = 25°C
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
500
900
1050
1200
μV
μV
μV
OS
A
l
l
0°C ≤ T ≤ 70°C
A
–40°C ≤ T ≤ 85°C
A
l
l
l
l
Input Offset Voltage Drift (Note 7)
Input Offset Current
2
0.7
8
5
2
μV/°C
nA
ΔV /ΔT
OS
I
OS
I
B
Input Bias Current
15
nA
Input Bias Current Drift
Input Noise Voltage
0.01
1
nA/°C
0.1Hz to 10Hz
f = 1kHz
μV
P-P
e
n
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
50
nV/√Hz
pA/√Hz
i
n
f = 1kHz
0.05
l
l
R
IN
Differential
Common Mode, V = –5V to 13V
3.4
1.5
6.5
3
Mꢀ
Mꢀ
CM
C
Input Capacitance
5
pF
V
IN
l
l
Input Voltage Range
–5
68
13
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
= –5V to 13V
80
dB
CM
A
VOL
V = 4V, R = 10k
55
40
30
150
V/mV
V/mV
V/mV
O
L
0°C ≤ T ≤ 70°C
l
l
A
–40°C ≤ T ≤ 85°C
A
1782fb
4
LT1782
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse
power tested unless otherwise specified.
LT1782C/LT1782I
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
V
Output Voltage Swing LOW
No Load
–4.997 –4.992
V
V
V
OL
I
I
= 5mA
–4.8
–4.6
–4.5
–4.2
SINK
SINK
= 10mA
l
l
l
V
Output Voltage Swing HIGH
Short-Circuit Current (Note 2)
No Load
4.91
4.6
4.94
4.8
V
V
V
OH
I
I
= 5mA
SINK
SINK
= 10mA
4.5
4.74
I
Short to GND
0°C ≤ T ≤ 70°C
18
15
30
mA
mA
SC
l
l
A
PSRR
Power Supply Rejection Ratio
Supply Current
V = 1.5V to 9V
S
90
100
45
dB
I
S
60
65
70
μA
μA
μA
0°C ≤ T ≤ 70°C
l
l
A
–40°C ≤ T ≤ 85°C
A
l
Supply Current, SHDN
Shutdown Pin Current
V
= –3V, V = 5V, No Load (Note 10)
6
20
μA
PIN5
S
l
l
I
V
PIN5
V
PIN5
= –4.7V, V = 5V, No Load (Note 10)
0.5
2
nA
μA
SHDN
S
= –3V, V = 5V, No Load (Note 10)
8
30
1
S
l
l
l
l
l
l
Maximum Shutdown Pin Current
Shutdown Output Leakage Current
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
V
PIN5
V
PIN5
= 9V, V = 9V (Note 10)
10
μA
μA
V
S
= –7V, V = 9V, No Load (Note 10)
0.05
S
V
V
V = 5V (Note 10)
S
–4.7
L
V = 5V (Note 10)
S
–3
V
H
t
t
V
PIN5
V
PIN5
= 0V to –5V, R = 10k (Note 10)
100
6
μs
μs
ON
OFF
L
Turn-Off Time
= –5V to 0V, R = 10k (Note 10)
L
GBW
Gain Bandwidth Product
f = 5kHz
0°C ≤ T ≤ 70°C
120
110
100
225
kHz
kHz
kHz
l
l
A
–40°C ≤ T ≤ 85°C
A
SR
Slew Rate
A = –1, R = ∞, V = 4V, Measured at V = 2V
0.0375
0.033
0.030
0.075
V/μs
V/μs
V/μs
V
L
O
O
l
l
0°C ≤ T ≤ 70°C
A
–40°C ≤ T ≤ 85°C
A
t
Settling Time
50
3
μs
ΔV
= 4V to 0.1%, A = 1
V
S
OUT
FPBW
Full-Power Bandwidth (Note 9)
V
OUT
= 8V
kHz
P-P
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, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
LT1782H
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
400
800
3
μV
OS
l
l
mV
Input Offset Voltage Drift
Input Offset Current
15
μV/°C
ΔV /ΔT
OS
l
l
I
OS
3
2
nA
μA
V
V
= 18V (Note 5)
= 18V (Note 5)
CM
CM
l
l
I
Input Bias Current
30
25
nA
μA
B
l
Input Voltage Range
0.3
18
V
CMRR
Common Mode Rejection Ratio
V
CM
V
CM
= 0.3V to V – 1V
l
l
76
60
dB
dB
CC
= 0.3V to 18V
1782fb
5
LT1782
ELECTRICAL CHARACTERISTICS 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, for the 6-lead part VPIN5 = 0V, pulse power
tested unless otherwise specified. (Note 4)
LT1782H
SYMBOL
PARAMETER
CONDITIONS
V = 3V, V = 500mV to 2.5V, R = 10k
MIN
TYP
MAX
UNITS
A
Large-Signal Voltage Gain
200
50
1500
V/mV
V/mV
VOL
S
O
L
l
l
V = 5V, V = 500mV to 4.5V, R = 10k
400
80
1500
V/mV
V/mV
S
O
L
l
l
l
V
V
Output Voltage Swing LOW
Output Voltage Swing HIGH
No Load
15
mV
mV
mV
OL
OH
I
= 5mA
900
SINK
V = 5V, I
= 10mA
SINK
1500
S
l
l
V = 3V, No Load
2.85
2.20
V
V
S
V = 3V, I
= 5mA
SOURCE
S
l
l
V = 5V, No Load
S
4.85
3.80
V
V
S
V = 5V, I
= 10mA
SOURCE
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
Supply Current
V = 3V to 12.5V, V = V = 1V
l
l
l
80
2.7
18
dB
V
S
CM
O
I = –100μA
S
V
I
I
40
55
μA
μA
S
l
l
100
Supply Current, SHDN
Shutdown Pin Current
V
PIN5
= 2V, No Load (Note 10)
25
μA
l
l
V
PIN5
V
PIN5
= 0.3V, No Load (Note 10)
= 2V, No Load (Note 10)
0.5
nA
μA
SHDN
12
3
l
l
l
l
Output Leakage Current
V
PIN5
V
PIN5
= 2V, No Load (Note 10)
= 18V, No Load
μA
μA
V
Maximum Shutdown Pin Current
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Gain Bandwidth Product
45
0.3
V
V
(Note 10)
L
(Note 10)
2
V
H
GBW
f = 10kHz (Note 5)
110
65
200
kHz
kHz
l
l
SR
Slew Rate
A = –1, R = ∞ (Note 7)
0.035
0.020
0.07
V/μs
V/μs
V
L
The l denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C.
VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified. (Note 4)
LT1782H
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
500
900
3.2
μV
OS
l
l
l
l
l
mV
Input Offset Voltage Drift (Note 9)
Input Offset Current
15
3
μV/°C
nA
ΔV /ΔT
OS
I
OS
I
B
Input Bias Current
30
nA
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
= –4.7V to 13V
60
dB
CM
A
V = 4V, R = 10k
S
55
20
150
V/mV
V/mV
VOL
L
l
l
l
l
V
Output Voltage Swing
No Load
SINK
SINK
4.85
4.10
3.50
V
V
V
O
I
I
=
=
5mA
10mA
1782fb
6
LT1782
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range of –40°C ≤ TA ≤ 125°C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless
otherwise specified. (Note 4)
LT1782H
SYMBOL
PARAMETER
CONDITIONS
V = 1.5V to 9V
MIN
80
TYP
MAX
UNITS
dB
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Supply Current
l
l
S
1.35
V
I
S
45
60
110
μA
μA
l
l
Supply Current, SHDN
Shutdown Pin Current
V
PIN5
= –3V, V = 5V, No Load (Note 10)
25
μA
S
l
l
I
V
PIN5
V
PIN5
= –4.7V, V = 5V, No Load (Note 10)
0.5
nA
μA
SHDN
S
= –3V, V = 5V, No Load (Note 10)
12
45
S
l
l
l
l
Maximum Shutdown Pin Current
Output Leakage Current
V
PIN5
V
PIN5
= 9V, V = 9V, No Load (Note 10)
μA
μA
V
S
= –7V, V = 9V, No Load
3
S
V
V
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Gain Bandwidth Product
V = 5V
S
–4.7
L
V = 5V
S
–3
V
H
GBW
f = 5kHz
120
70
225
kHz
kHz
l
l
SR
Slew Rate
A = –1, R = ∞, V = 4V
0.0375
0.0220
0.075
V/μs
V/μs
V
L
O
Measured at V = 2V
O
Note 5: V = 5V limits are guaranteed by correlation to V = 3V and
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.
S
S
V = 5V or V = 9V tests.
S
S
Note 6: V = 3V limits are guaranteed by correlation to V = 5V and
S
S
V = 5V or V = 9V tests.
S
S
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum.
Note 7: Guaranteed by correlation to slew rate at V = 5V, and GBW at
S
V = 3V and V = 5V tests.
S
S
Note 3: The LT1782C and LT1782I are guaranteed functional over the
operating temperature range of –40°C to 85°C. The LT1782H is guaranteed
functional over the operating temperature range of –40°C to 125°C.
Note 8: This specification implies a typical input offset voltage of 1.8mV at
= 18V and a maximum input offset voltage of 7.2mV at V = 18V.
Note 9: This parameter is not 100% tested.
V
CM
CM
Note 4: The LT1782C is guaranteed to meet specified performance from
0°C to 70°C. The LT1782C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but is not tested or
QA sampled at these temperatures. The LT1782I is guaranteed to meet
specified performance from – 40°C to 85°C. The LT1782H is guaranteed to
meet specified performance from –40°C to 125°C.
Note 10: Specifications apply to 6-lead SOT-23 with shutdown.
Note 11: Full-power bandwidth is calculated for the slew rate.
FPBW = SR/2ČV .
P
1782fb
7
LT1782
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage
Supply Current vs Supply Voltage
Minimum Supply Voltage
vs Large Input Voltage
400
300
5
4
3
2
1
0
50
45
40
35
30
25
20
V
= 5V, 0V
S
T
= 125°C
A
200
100
T
T
= 25°C
A
A
0
= –55°C
T
= 125°C
T
T
= –55°C
= 25°C
A
A
5V
–100
–200
–300
–400
+
–
V
IN
A
–10–8 –6 –4 –2 0
2
4
6
8 10 12 14 16 18
2
4
6
8
10 12 14 16 18
0
1
2
3
4
5
V
(V)
SUPPLY VOLTAGE (V)
TOTAL SUPPLY VOLTAGE (V)
IN
1782 G03
1782 G01
1782 G02
Input Bias Current
Output Saturation Voltage
Output Saturation Voltage
vs Common Mode Voltage
vs Load Current (Output High)
vs Load Current (Output Low)
1
0.1
6000
5000
4000
3000
2000
1000
1
V
= 5V, 0V
V
V
=
2.5V
= 30mV
S
S
V
V
=
2.5V
= 30mV
S
OD
OD
T
= 125°C
A
T
= 125°C
A
T
= 25°C
T
= 125°C
A
A
0.1
T
A
= –55°C
T
= 25°C
T
= –55°C
T
= 25°C
A
A
A
40
30
20
10
0
T
= –55°C
0.01
0.001
A
0.01
–10
3.8
4
4.2 4.4 4.6 4.8
5
5.2 5.4
15 16 18
1μ
10μ
100μ
1m
10m
1μ
10μ
1μ
1m
10m
COMMON MODE VOLTAGE (V)
SOURCING LOAD CURRENT (A)
SINKING LOAD CURRENT (A)
1782 G05
1782 G06
1782 G04
Output Saturation Voltage
vs Input Overdrive
Output Short-Circuit Current
vs Temperature
0.1Hz to 10Hz Noise Voltage
40
35
30
25
20
15
100
10
1
V
=
5V
V = 2.5V
S
S
OUTPUT HIGH
SINKING CURRENT
SOURCING CURRENT
OUTPUT LOW
V
= 2.5V
S
NO LOAD
0
1
2
3
4
5
6
7
8
9
10
–50 –25
0
25
50
75 100 125
0
10
20
30
40
50
60
TIME (sec)
INPUT OVERDRIVE (mV)
TEMPERATURE (°C)
1782 G07
1782 G09
1782 G08
1782fb
8
LT1782
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Voltage Density
Gain and Phase Shift
vs Frequency
vs Frequency
Input Noise Current vs Frequency
80
70
60
50
40
30
20
70
60
100
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
V
= 2.5V
V
= 2.5V
S
S
80
50
60
PHASE
GAIN
40
40
30
20
20
0
10
–20
–40
–60
–80
–100
0
–10
–20
–30
1
10
100
1k
10k
1k
10k
100k
1M
1
10
100
1k
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
1782 G12
1782 G10
1782 G11
Gain Bandwidth Product
vs Temperature
Gain Bandwidth Product and
Slew Rate vs Temperature
Phase Margin vs Supply Voltage
230
220
210
200
190
180
170
0.11
0.10
0.09
0.08
0.07
0.06
0.05
0.04
60
55
50
f = 5kHz
V
= 2.5V
S
V
= 2.5V
S
PHASE MARGIN
RISING
240
220
200
180
160
FALLING
GAIN BANDWIDTH PRODUCT
A
R
= –1
= R = 10k
G
V
F
f = 5kHz
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
0
2
4
6
8
10 12 14 16 18
TEMPERATURE (°C)
TEMPERATURE (°C)
TOTAL SUPPLY VOLTAGE (V)
1782 G13
1782 G14
1782 G15
Gain Bandwidth Product and
Phase Margin vs Load Resistance
PSRR vs Frequency
CMRR vs Frequency
70
60
50
90
80
70
60
50
40
30
20
10
0
110
V
=
2.5V
V
= 2.5V
S
S
100
90
80
70
60
50
40
30
PHASE MARGIN
V
A
=
2.5V
= –1
= R = 10k
S
V
F
POSITIVE SUPPLY
250
200
150
100
50
R
G
f = 5kHz
GAIN BANDWIDTH PRODUCT
NEGATIVE SUPPLY
10k
–10
1k
10k
100k
1k
100k
1M
1k
10k
100k
LOAD RESISTANCE (ꢀ)
FREQUENCY (Hz)
FREQUENCY (Hz)
1782 G17
1782 G16
1782 G18
1782fb
9
LT1782
TYPICAL PERFORMANCE CHARACTERISTICS
Disabled Output Impedance
Settling Time to 0.1%
vs Output Step
Output Impedance vs Frequency
vs Frequency (Note 8)
1M
100k
10k
1k
4
3
10k
1k
V
V
=
PIN5
2.5V
V
= 2.5V
S
S
(SHUTDOWN) = 2.5V
A
= 1
A = –1
V
V
A
A
= 100
V
V
2
1
= 10
= 1
100
10
V
=
5V
0
S
A
–1
–2
–3
–4
V
1
A
= 1
A = –1
V
V
100
0.1
100
1k
10k
100k
1M
25
30
35
40
50
60
70
80
100 1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
SETTLING TIME (μs)
1782 G20
1782 G19
1782 G21
Capacitive Load Handling
Undistorted Output Swing
vs Frequency
Total Harmonic Distortion + Noise
vs Frequency
Overshoot vs Capacitive Load
1
40
35
30
25
20
15
10
5
12
10
8
V
V
= 5V, 0V
= 2.5V
V
V
V
= 3V, 0V
= 2V
DISTORTION ≤ 1%
= 1
S
CM
S
OUT
A
V
P-P
V
=
5V
S
= 1.2V
CM
R
L
= 10k
0.1
6
A
= 1
V
A
R
= –1
= R = 100k
G
V
F
4
0.010
0.001
A
= 5
V
=
1.5V
V
S
A
= 10
V
2
A
= 1
V
0
0
10
100
1000
10000
100
1k
10k
100k
10
100
1k
10k
FREQUENCY (Hz)
CAPACITIVE LOAD (pF)
FREQUENCY (Hz)
1782 G22
1782 G23
1782 G24
Total Harmonic Distortion + Noise
vs Load Resistance
Total Harmonic Distortion + Noise
vs Output Voltage Amplitude
Open-Loop Gain
10
1
10
1
f = 1kHz, R = 10k
L
V
A
V
= 3V TOTAL
= 1
V
S
= 5V
S
V
= 2V AT 1kHz
IN
P-P
A
V
V
= 1
=
CM
A
V
V
= –1, R = R = 100k
F G
V
S
V
S
1.5V
=
1.5V
= 0V
= 0V
R
R
= 10k
= 50k
CM
L
L
V
V
=
IN
1.5V
1V
S
=
0.1
0.01
0.1
0.01
V
V
= 3V, 0V
IN
S
= 0.5V TO 2.5V
V
V
= 3V, 0V
IN
S
R
= 2k
L
A
V
V
= 1
A
V
V
= –1, R = R = 100k
F
G
V
S
V
S
= 0.2V TO 2.2V
= 3V. 0V
= 3V, 0V
= 1.5V
= 1.5V
CM
CM
0.001
0.001
–6 –5 –4 –3 –2 –1
0
1
2
3
4
5
6
0
1
2
3
100
1k
10k
100k
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE AMPLITUDE (V
)
LOAD RESISTANCE TO GROUND (ꢀ)
P-P
1782 G26
1782 G25
1782 G27
1782fb
10
LT1782
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current
vs Shutdown Voltage
Large-Signal Response
Small-Signal Response
50
40
30
20
10
0
V
= 5V, 0V
S
T
= 125°C
A
T
= 25°C
A
T
= –55°C
A
1782 G29
1782 G30
V
A
C
=
5V
V
A
C
=
5V
S
V
L
S
V
L
= 1
= 1
= 15pF
= 15pF
0
0.5
1
1.5
2
2.5
SHUTDOWN PIN VOLTAGE (V)
1782 G28
APPLICATIONS INFORMATION
Supply Voltage
A Schottky diode in the collector of the input NPN tran-
sistors, along with special geometries for these NPN
transistors, allows the LT1782 to operate with either or
The positive supply pin of the LT1782 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.
+
+
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 4μA at room temperature. The input
offset voltage is typically 1.8mV when operating above
+
The LT1782 is protected against reverse battery voltages
up to 18V. In the event a reverse battery condition occurs,
the supply current is typically less than 1nA.
V . The LT1782 will operate with its inputs 18V above
–
+
V regardless of V .
The inputs are protected against excursions as much as
–
10V below V by an internal 6k resistor in series with each
Inputs
input and a diode from the input to the negative supply.
The input stage of the LT1782 incorporates phase reversal
protection to prevent the output from phase reversing for
The LT1782 has two input stages, NPN and PNP (see the
SimplifiedSchematic),resultinginthreedistinctoperating
regions as shown in the Input Bias Current vs Common
Mode typical performance curve.
–
inputs up to 9V below V . There are no clamping diodes
between the inputs and the maximum differential input
voltage is 18V.
+
For input voltages about 0.8V or more below V , the PNP
input stage is active and the input bias current is typically
–8nA. 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 15nA. Increases in tem-
peraturewillcausethevoltageatwhichoperationswitches
from the PNP input stage to the NPN input stage to move
Output
The output of the LT1782 can swing to within 60mV of the
positive rail with no load and within 3mV of the negative
rail with no load. When monitoring voltages within 60mV
of the positive rail or within 3mV of the negative rail, gain
should be taken to keep the output from clipping. The
+
towards V . The input offset voltage of the NPN stage is
untrimmed and is typically 1.8mV.
LT1782 can sink and source over 30mA at 5V supplies,
1782fb
11
LT1782
APPLICATIONS INFORMATION
sourcing current is reduced to 10mA at 3V total supplies
as noted in the Electrical Characteristics section.
+
the input voltage swing between ground and (V – 0.8V).
See the Typical Performance Characteristics curves,
“Total Harmonic Distortion + Noise vs Ouput Voltage
Amplitude.”
The LT1782 is internally compensated to drive at least
600pF of capacitance under any output loading condi-
tions. A 0.22μF capacitor in series with a 150ꢀ resistor
between the output and ground will compensate these
amplifiers for larger capacitive loads, up to 10,000pF, at
all output currents.
Gain
The open-loop gain is almost independent of load when
theoutputissourcingcurrent.Thisoptimizesperformance
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.
Distortion
There are two main contributors to distortion in op amps:
output crossover distortion as the output transitions from
sourcing to sinking current, and distortion caused by non-
linear 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
Shutdown
The 6-lead part includes a shutdown feature that disables
thepart,reducingquiescentcurrentandmakingtheoutput
high impedance. The part can be shut down by bringing
–
+
the SHDN pin 1.2V or more above V . When shut down,
not within 0.8V of V ), the CMRR is very good, typically
the supply current is about 5mA and the output leakage
100dB. When the LT1782 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 LT1782 should be operated single
supply, with the output always sourcing current and with
–
+
current is less than 1μA (V ≤ V
≤ V ). In normal opera-
OUT
–
tion, the SHDN pin can be tied to V or left floating. See
the Typical Performance Characteristics curves, “Supply
Current vs Shutdown Pin Voltage.”
SIMPLIFIED SCHEMATIC
+
V
Q2
Q1
Q3
Q22
D1
D3
SHDN
J1
R1
30k
R2
6k
Q19
Q4
–IN
+IN
Q17
Q18
Q20
+
OUT
Q7
Q8
Q11 Q12
R3
6k
2μA
Q16
Q15
Q9
Q10
Q26
Q13
Q14
Q21
R4
40k
R5
40k
Q25 Q23
Q24
Q5
Q6
D4
D5
–
V
1782 SS
1782fb
12
LT1782
TYPICAL APPLICATIONS
Protected Fault Conditions
OK!
–18V
OK!
5V
+
V
LT1782
LT1782
+
24V
REVERSE BATTERY
INPUT OVERVOLTAGE
OK!
5V
OK!
5V
+
18V
LT1782
LT1782
10V
+
INPUT DIFFERENTIAL VOLTAGE
INPUT BELOW GROUND
1782 TA02
Compact, High Output Current, Low Dropout, Precision 2.5V Supply
V
S
2.8V to 3.3V
SUPPLY CURRENT 120μA, NO LOAD
22Ω
5%
1k
5%
+
VISHAY
SILICONIX
Si3445DV
680Ω
5%
LT1782
–
100k
5%
0.1μF
V
OUT
LT1790-2.5
2.5V
1782 TA03
1μF
I
= 0mA TO 300mA
LOAD
NOTE: NOT CURRENT LIMITED
1782fb
13
LT1782
PACKAGE DESCRIPTION
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.50 – 1.75
(NOTE 4)
2.80 BSC
1.4 MIN
3.85 MAX 2.62 REF
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
NOTE:
S5 TSOT-23 0302 REV B
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1782fb
14
LT1782
PACKAGE DESCRIPTION
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
2.90 BSC
(NOTE 4)
0.62
MAX
0.95
REF
1.22 REF
1.4 MIN
1.50 – 1.75
2.80 BSC
3.85 MAX 2.62 REF
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
S6 TSOT-23 0302 REV B
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1782fb
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT1782
TYPICAL APPLICATIONS
Current Source
V
CC
LT1634-1.25
R1
+
2N3906
LT1782
–
1.25V
R1
I
=
OUT
1782 TA04
Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier
Programmable Gain Amplifier Frequency Response
30
25
V
CC
A
= 20
V
A
= 20
A = 2
V
V
20
15
SHDN
V
CC
10
IN
+
5
A
= 2
V
OUT
LT1784
0
SHDN
V
CC
–
–5
+
V
–10
–15
–20
EE
LT1782
–
R1 + R2
R3
1k
10k
100k
FREQUENCY (Hz)
1M
10M
A
= 1+
V
(
(
)
)
V
EE
1782 TA06
R1
R1
10k
R2
OR 1+
9.09k
R2 + R3
1782 TA05
R3
1k
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LT1783
Micropower Over-The-Top SOT-23 Rail-to-Rail Input and
Output Op Amp
SOT-23 Package, Micropower 210μA per Amplifier, Rail-to-Rail Input and
Output, 1.25MHz 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, V Extends 44V Above V , Independent of V ,
CM EE CC
MSOP Package, Shutdown Function
LT1638/LT1639 Dual/Quad, 1.2MHz, 0.4V/μs, Over-The-Top Micropower
Rail-to-Rail Input and Output Op Amps
170mA Supply Current, Single Supply Input Range: –0.4V to 44V,
Rail-to-Rail Input and Output
1782fb
LT 0809 REV B • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
16
●
●
© LINEAR TECHNOLOGY CORPORATION 1999
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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