FEATURES
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LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
DESCRIPTION
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
draws less than 55µA of quiescent current and has reverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
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.
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.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Operates with Inputs Above V
+
Rail-to-Rail Input and Output
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
Gain Bandwidth Product: 200kHz
Slew Rate: 0.07V/µs
APPLICATIONS
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Portable Instrumentation
Battery- or Solar-Powered Systems
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
TYPICAL APPLICATION
Positive Supply Rail Current Sense
V
+
5V TO 18V
5V
0.2
200
PERCENTAGE OF AMPLIFIERS
200
25
20
15
10
5
0
–900
Distribution of Input Offset Voltage
V
S
= 5V, 0V
V
CM
= 2.5V
+
LT1782
MMBT3904
V
OUT
= 2 (I
LOAD
)
0V TO 4.3V
2k
1782 TA01a
–
I
LOAD
LOAD
–600 –300
0
300
600
INPUT OFFSET VOLTAGE (µV)
900
1782fc
1782 TA01b
1
LT1782
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V
+
to V
–
) ................................ 18V
Input Differential Voltage.......................................... 18V
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
Specified Temperature Range (Note 4)
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
PIN CONFIGURATION
TOP VIEW
OUT 1
V
–
2
+IN 3
+ –
TOP VIEW
5 V
+
4 –IN
OUT 1
V
–
2
+IN 3
+ –
+
6 V
5 SHDN
4 –IN
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 250°C/W
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 230°C/W
ORDER INFORMATION
LEAD FREE FINISH
LT1782CS5#PBF
LT1782IS5#PBF
LT1782HS5#PBF
LT1782CS6#PBF
LT1782IS6#PBF
LT1782HS6#PBF
TAPE AND REEL
LT1782CS5#TRPBF
LT1782IS5#TRPBF
LT1782HS5#TRPBF
LT1782CS6#TRPBF
LT1782IS6#TRPBF
LT1782HS6#TRPBF
PART MARKING
LTLD
LTLE
LTXK
LTIS
LTIT
LTXL
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
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
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/
1782fc
2
LT1782
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
PARAMETER
Input Offset Voltage
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V, V
CM
= V
OUT
= half supply, for the 6-lead part
V
PIN5
= 0V, pulse power tested unless otherwise specified.
LT1782C/LT1782I
CONDITIONS
T
A
= 25°C
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
l
MIN
TYP
400
MAX
800
950
1100
5
2
1
15
12
UNITS
µV
µV
µV
µV/°C
nA
µA
nA
µA
nA
nA/°C
µV
P-P
nV/√Hz
pA/√Hz
MΩ
GΩ
MΩ
pF
Input Offset Voltage Drift (Note 7)
Input Offset Current
Input Bias Current
V
CM
= 18V (Note 5)
V
CM
= 18 (Note 5)
SHDN or V
S
= 0V, V
CM
= 0V to 18V
–40°C ≤ T
A
≤ 85°C
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= 0V to (V
CC
– 1V)
Common Mode, V
CM
= 0V to 18V
2
0.7
8
6
0.1
0.01
1
50
0.05
l
l
l
l
l
Input Bias Current Drift
Input Noise Voltage
e
n
i
n
R
IN
C
IN
CMRR
PSRR
A
VOL
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
l
l
3.4
1.5
0
90
68
90
200
133
100
400
250
200
6.5
5
3
5
18
100
80
100
1500
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
(Note 5)
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
CM
= 0V to V
CC
– 1V
V
CM
= 0V to 18V (Note 8)
V
S
= 3V to 12.5V, V
CM
= V
O
= 1V
V
S
= 3V, V
O
= 500mV to 2.5V, R
L
= 10k
V
S
= 3V, 0°C ≤ T
A
≤ 70°C
V
S
= 3V, –40°C ≤ T
A
≤ 85°C
V
S
= 5V, V
O
= 500mV to 4.5V, R
L
= 10k
V
S
= 5V, 0°C ≤ T
A
≤ 70°C
V
S
= 5V, –40°C ≤ T
A
≤ 85°C
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
V
dB
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
500
V
OL
V
OH
Output Voltage Swing LOW
No Load
I
SINK
= 5mA
V
S
= 5V, I
SINK
= 10mA
V
S
= 3V, No Load
V
S
= 3V, I
SOURCE
= 5mA
V
S
= 5V, No Load
V
S
= 5V, I
SOURCE
= 10mA
3
200
400
2.91
2.6
4.91
4.5
5
15
15
20
2.94
2.8
4.94
4.74
10
30
30
40
8
500
800
mV
mV
mV
V
V
V
V
mA
mA
mA
mA
V
V
Output Voltage Swing HIGH
I
SC
Short-Circuit Current (Note 2)
V
S
= 3V, Short to GND
V
S
= 3V, Short to V
CC
V
S
= 5V, Short to GND
V
S
= 5V, Short to V
CC
Minimum Supply Voltage
Reverse Supply Voltage
I
S
Supply Current
(Note 6)
Supply Current, SHDN
I
S
= –100µA
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
V
PIN5
= 2V, No Load (Note 10)
l
l
l
l
l
2.7
18
40
55
60
65
15
µA
µA
µA
µA
5
1782fc
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LT1782
ELECTRICAL CHARACTERISTICS
SYMBOL
I
SHDN
PARAMETER
Shutdown Pin Current
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V, V
CM
= V
OUT
= half supply, for the 6-lead part
V
PIN5
= 0V, pulse power tested unless otherwise specified.
LT1782C/LT1782I
CONDITIONS
V
PIN5
= 0.3V, No Load (Note 10)
V
PIN5
= 2V, No Load (Note 10)
V
PIN5
= 5V, No Load (Note 10)
V
PIN5
= 2V, No Load (Note 10)
V
PIN5
= 18V, No Load (Note 10)
(Note 10)
(Note 10)
V
PIN5
= 5V to 0V, R
L
= 10k (Note 10)
V
PIN5
= 0V to 5V, R
L
= 10k (Note 10)
f = 5kHz
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
A
V
= –1, R
L
= ∞
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
V
S
= 5V,
∆V
OUT
= 2V to 0.1%, A
V
= –1
V
S
= 3V, V
O
= 2V
P-P
, A
V
= 1, R
L
= 10k, f = 1kHz
V
OUT
= 2V
P-P
l
l
l
l
l
l
l
l
l
l
l
MIN
TYP
0.5
2
5
0.05
10
MAX
8
1
30
0.3
UNITS
nA
µA
µA
µA
µA
V
V
µs
µs
kHz
kHz
kHz
V/µs
V/µs
V/µs
µs
%
kHz
Shutdown Output Leakage Current
Maximum Shutdown Pin Current
V
L
V
H
t
ON
t
OFF
GBW
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
Turn-Off Time
Gain Bandwidth Product
(Note 5)
Slew Rate
(Note 5)
Settling Time
Distortion
Full-Power Bandwidth (Note 9)
2
100
6
110
100
90
0.035
0.031
0.028
200
SR
0.07
t
S
THD
FPBW
45
0.003
11
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
= ±5V, V
CM
= 0V, V
OUT
= 0V, for the 6-lead part V
PIN5
= V
–
, pulse power tested unless otherwise specified.
LT1782C/LT1782I
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
PARAMETER
Input Offset Voltage
CONDITIONS
T
A
= 25°C
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
l
l
l
l
MIN
TYP
500
MAX
900
1050
1200
5
2
15
UNITS
µV
µV
µV
µV/°C
nA
nA
nA/°C
µV
P-P
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
Input Offset Voltage Drift (Note 7)
Input Offset Current
Input Bias Current
Input Bias Current Drift
Input Noise Voltage
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= –5V to 13V
2
0.7
8
0.01
1
50
0.05
e
n
i
n
R
IN
C
IN
CMRR
A
VOL
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
Large-Signal Voltage Gain
l
l
3.4
1.5
–5
68
55
40
30
6.5
3
5
13
80
150
l
V
dB
V/mV
V/mV
V/mV
V
CM
= –5V to 13V
V
O
= ±4V, R
L
= 10k
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
l
1782fc
4
LT1782
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OL
V
OH
I
SC
PSRR
I
S
PARAMETER
Output Voltage Swing LOW
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, V
CM
= 0V, V
OUT
= 0V, for the 6-lead part V
PIN5
= V
–
, pulse
power tested unless otherwise specified.
LT1782C/LT1782I
CONDITIONS
No Load
I
SINK
= 5mA
I
SINK
= 10mA
No Load
I
SINK
= 5mA
I
SINK
= 10mA
Short to GND
0°C ≤ T
A
≤ 70°C
V
S
= ±1.5V to ±9V
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
V
PIN5
= –3V, V
S
= ±5V, No Load (Note 10)
V
PIN5
= –4.7V, V
S
= ±5V, No Load (Note 10)
V
PIN5
= –3V, V
S
= ±5V, No Load (Note 10)
V
PIN5
= 9V, V
S
= ±9V (Note 10)
V
PIN5
= –7V, V
S
= ±9V, No Load (Note 10)
V
S
= ±5V (Note 10)
V
S
= ±5V (Note 10)
V
PIN5
= 0V to –5V, R
L
= 10k (Note 10)
V
PIN5
= –5V to 0V, R
L
= 10k (Note 10)
f = 5kHz
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
A
V
= –1, R
L
= ∞, V
O
= ±4V, Measured at V
O
= ±2V
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
∆V
OUT
= 4V to 0.1%, A
V
= 1
V
OUT
= 8V
P-P
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
TYP
–4.997
–4.8
–4.6
MAX
–4.992
–4.5
–4.2
UNITS
V
V
V
V
V
V
mA
mA
dB
Output Voltage Swing HIGH
4.91
4.6
4.5
18
15
90
4.94
4.8
4.74
30
100
45
60
65
70
20
8
30
1
–4.7
Short-Circuit Current (Note 2)
Power Supply Rejection Ratio
Supply Current
µA
µA
µA
µA
nA
µA
µA
µA
V
V
µs
µs
kHz
kHz
kHz
V/µs
V/µs
V/µs
µs
kHz
Supply Current, SHDN
I
SHDN
Shutdown Pin Current
Maximum Shutdown Pin Current
Shutdown Output Leakage Current
V
L
V
H
t
ON
t
OFF
GBW
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
Turn-Off Time
Gain Bandwidth Product
6
0.5
2
10
0.05
–3
100
6
120
110
100
0.0375
0.033
0.030
225
SR
Slew Rate
0.075
t
S
FPBW
Settling Time
Full-Power Bandwidth (Note 9)
50
3
The
l
denotes the specifications which apply over the full operating temperature range of –40°C ≤ T
A
≤ 125°C. V
S
= 3V, 0V; V
S
= 5V, 0V;
V
CM
= V
OUT
= half supply, for the 6-lead part V
PIN5
= 0V, pulse power tested unless otherwise specified. (Note 4)
LT1782H
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
PARAMETER
Input Offset Voltage
l
CONDITIONS
MIN
TYP
400
MAX
800
3
15
3
2
30
25
UNITS
µV
mV
µV/°C
nA
µA
nA
µA
V
dB
dB
1782fc
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
V
CM
= 18V (Note 5)
V
CM
= 18V (Note 5)
V
CM
= 0.3V to V
CC
– 1V
V
CM
= 0.3V to 18V
l
l
l
l
l
l
l
l
0.3
76
60
18
CMRR
Common Mode Rejection Ratio
5
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