LINER LT1782CS6 Micropower, over-the-top sot-23, rail-to-rail input and output op amp Datasheet

LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
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FEATURES
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DESCRIPTIO
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) ThinSOTTM 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
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APPLICATIO S
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The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-TopTM operation 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.
Portable Instrumentation
Battery- or Solar-Powered Systems
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation.
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The LT®1782 is a 200kHz op amp available in the small
SOT-23 package that operates on all single and split
supplies 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.
TYPICAL APPLICATIO
Distribution of Input Offset Voltage
25
5V TO 18V
200Ω
5V
0.2Ω
200Ω
LOAD
ILOAD
+
LT1782
MMBT3904
–
VOUT = 2Ω(ILOAD)
0V TO 4.3V
PERCENTAGE OF AMPLIFIERS
Positive Supply Rail Current Sense
V+
20
VS = 5V, 0V
VCM = 2.5V
15
10
5
2k
1782 TA01
0
–900
–600 –300
0
300
600
INPUT OFFSET VOLTAGE (µV)
900
1782 TA01a
1
LT1782
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AXI U
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ABSOLUTE
RATI GS
(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
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PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
TOP VIEW
5 V+
OUT 1
V– 2
+ –
+IN 3
4 –IN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
LT1782CS5
LT1782IS5
LT1782HS5
S5 PART MARKING
LTLD
LTLE
LTXK
TJMAX = 150°C, θJA = 250°C/ W
V– 2
+IN 3
LT1782CS6
LT1782IS6
LT1782HS6
+
6 V
OUT 1
+ –
5 SHDN
4 –IN
S6 PACKAGE
6-LEAD PLASTIC SOT-23
TJMAX = 150°C, θJA = 230°C/ W
S6 PART MARKING
LTIS
LTIT
LTXL
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are 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.
SYMBOL PARAMETER
CONDITIONS
VOS
TA = 25°C
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
Input Offset Voltage
∆VOS/∆T Input Offset Voltage Drift (Note 7)
IOS
Input Offset Current
VCM = 18V (Note 5)
IB
Input Bias Current
VCM = 18 (Note 5)
SHDN or VS = 0V, VCM = 0V to 18V
LT1782C/LT1782I
MIN
TYP
MAX
UNITS
µV
µV
µV
400
800
950
1100
●
2
5
µV/°C
●
●
0.7
2
1
nA
µA
●
●
8
6
0.1
15
12
nA
µA
nA
●
●
●
Input Bias Current Drift
–40°C ≤ TA ≤ 85°C
0.01
nA/°C
Input Noise Voltage
0.1Hz to 10Hz
1
µVP-P
en
Input Noise Voltage Density
f = 1kHz
50
nV/√Hz
in
Input Noise Current Density
f = 1kHz
0.05
pA/√Hz
2
LT1782
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are 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.
SYMBOL PARAMETER
CONDITIONS
RIN
Input Resistance
Differential
Common Mode, VCM = 0V to (VCC – 1V)
Common Mode, VCM = 0V to 18V
CIN
Input Capacitance
Input Voltage Range
LT1782C/LT1782I
MIN
TYP
MAX
●
3.4
●
1.5
●
0
UNITS
6.5
5
3
MΩ
GΩ
MΩ
5
pF
18
V
CMRR
Common Mode Rejection Ratio
(Note 5)
VCM = 0V to VCC – 1V
VCM = 0V to 18V (Note 8)
●
●
90
68
100
80
dB
dB
PSRR
Power Supply Rejection Ratio
VS = 3V to 12.5V, VCM = VO = 1V
●
90
100
dB
AVOL
Large-Signal Voltage Gain
VS = 3V, VO = 500mV to 2.5V, RL = 10k
VS = 3V, 0°C ≤ TA ≤ 70°C
VS = 3V, –40°C ≤ TA ≤ 85°C
200
133
100
1500
●
●
V/mV
V/mV
V/mV
VS = 5V, VO = 500mV to 4.5V, RL = 10k
VS = 5V, 0°C ≤ TA ≤ 70°C
VS = 5V, –40°C ≤ TA ≤ 85°C
400
250
200
1500
●
●
V/mV
V/mV
V/mV
VOL
Output Voltage Swing LOW
No Load
ISINK = 5mA
VS = 5V, ISINK = 10mA
●
●
●
VOH
Output Voltage Swing HIGH
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
●
●
2.91
2.6
2.94
2.8
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
●
●
4.91
4.5
4.94
4.74
V
V
VS = 3V, Short to GND
VS = 3V, Short to VCC
5
15
10
30
mA
mA
VS = 5V, Short to GND
VS = 5V, Short to VCC
15
20
30
40
mA
mA
ISC
Short-Circuit Current (Note 2)
Minimum Supply Voltage
ISHDN
8
500
800
mV
mV
mV
●
2.7
V
IS = –100µA
●
18
V
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
●
●
Supply Current, SHDN
VPIN5 = 2V, No Load (Note 10)
Shutdown Pin Current
Reverse Supply Voltage
IS
3
200
400
40
55
60
65
µA
µA
µA
●
5
15
µA
VPIN5 = 0.3V, No load (Note 10)
VPIN5 = 2V, No Load (Note 10)
VPIN5 = 5V, No Load (Note 10)
●
●
●
0.5
2
5
8
nA
µA
µA
Shutdown Output Leakage Current
VPIN5 = 2V, No Load (Note 10)
●
0.05
1
µA
10
30
µA
0.3
V
Supply Current
(Note 6)
Maximum Shutdown Pin Current
VPIN5 = 18V, No Load (Note 10)
●
VL
Shutdown Pin Input Low Voltage
(Note 10)
●
VH
Shutdown Pin Input High Voltage
(Note 10)
●
tON
Turn-On Time
VPIN5 = 5V to 0V, RL = 10k (Note 10)
100
µs
tOFF
Turn-Off Time
VPIN5 = 0V to 5V, RL = 10k (Note 10)
6
µs
GBW
Gain Bandwidth Product
(Note 5)
f = 5kHz
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
200
kHz
kHz
kHz
●
●
2
110
100
90
V
3
LT1782
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are 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.
SYMBOL PARAMETER
CONDITIONS
LT1782C/LT1782I
MIN
TYP
MAX
SR
Slew Rate
(Note 5)
AV = –1, RL = ∞
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
0.035
0.031
0.028
tS
Settling Time
VS = 5V, ∆VOUT = 2V to 0.1%, AV = –1
THD
Distortion
VS = 3V, VO = 2VP–P, AV = 1, RL = 10k, f =1kHz
FPBW
Full-Power Bandwidth (Note 9)
VOUT = 2VP–P
●
●
0.07
UNITS
V/µs
V/µs
V/µs
45
µs
0.003
%
11
kHz
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C.
VS = ±5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
VOS
TA = 25°C
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
Input Offset Voltage
LT1782C/LT1782I
MIN
TYP
MAX
500
900
1050
1200
●
●
UNITS
µV
µV
µV
∆VOS/∆T Input Offset Voltage Drift (Note 7)
●
2
5
µV/°C
IOS
Input Offset Current
●
0.7
2
nA
IB
Input Bias Current
●
8
15
Input Bias Current Drift
●
0.01
nA/°C
1
µVP-P
Input Noise Voltage
0.1Hz to 10Hz
nA
en
Input Noise Voltage Density
f = 1kHz
50
nV/√Hz
in
Input Noise Current Density
f = 1kHz
0.05
pA/√Hz
RIN
Input Resistance
Differential
Common Mode, VCM = –5V to 13V
6.5
3
MΩ
MΩ
CIN
Input Capacitance
5
pF
Input Voltage Range
●
●
3.4
1.5
●
–5
13
V
CMRR
Common Mode Rejection Ratio
VCM = –5V to 13V
●
68
80
dB
AVOL
Large-Signal Voltage Gain
VO = ±4V, RL= 10k
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
150
●
●
55
40
30
V/mV
V/mV
V/mV
VOL
Output Voltage Swing LOW
No Load
ISINK = 5mA
ISINK = 10mA
●
●
●
VOH
Output Voltage Swing HIGH
No Load
ISOURCE = 5mA
ISOURCE = 10mA
●
●
●
4.91
4.6
4.5
4.94
4.8
4.74
ISC
Short-Circuit Current (Note 2)
Short to GND
0°C ≤ TA ≤ 70°C
18
15
30
●
mA
mA
VS = ±1.5V to ±9V
●
90
100
dB
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
●
●
Supply Current, SHDN
VPIN5 = –3V, VS = ±5V, No Load (Note 10)
Shutdown Pin Current
VPIN5 = –4.7V, VS = ±5V, No load (Note 10)
VPIN5 = –3V, VS = ±5V, No Load (Note 10)
PSRR
Power Supply Rejection Ratio
IS
Supply Current
ISHDN
4
– 4.997
– 4.8
– 4.6
– 4.992
– 4.5
– 4.2
V
V
V
V
V
V
45
60
65
70
µA
µA
µA
●
6
20
µA
●
●
0.5
2
8
nA
µA
LT1782
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C.
VS = ±5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified.
SYMBOL PARAMETER
Maximum Shutdown Pin Current
LT1782C/LT1782I
MIN
TYP
MAX
CONDITIONS
VPIN5 = 9V, VS = ±9V (Note 10)
●
10
0.05
UNITS
30
µA
1
µA
– 4.7
V
Shutdown Output Leakage Current
VPIN5 = –7V, VS = ±9V, No Load (Note 10)
●
VL
Shutdown Pin Input Low Voltage
VS = ±5V (Note 10)
●
VH
Shutdown Pin Input High Voltage
VS = ±5V (Note 10)
●
tON
Turn-On Time
VPIN5 = 0V to –5V, RL = 10k (Note 10)
●
100
µs
tOFF
Turn-Off Time
VPIN5 = –5V to 0V, RL = 10k (Note 10)
●
6
µs
GBW
Gain Bandwidth Product
f = 5kHz
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
120
110
100
225
●
●
kHz
kHz
kHz
AV = –1, RL = ∞, VO = ±4V, Measured at VO = ±2V
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
0.0375
0.033
0.030
0.075
●
●
V/µs
V/µs
V/µs
SR
Slew Rate
–3
V
tS
Settling Time
∆VOUT = 4V to 0.1%, AV = 1
50
µs
FPBW
Full-Power Bandwidth (Note 9)
VOUT = 8VP–P
3
kHz
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, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
SYMBOL PARAMETER
UNITS
●
800
3
µV
mV
∆VOS/∆T Input Offset Voltage Drift
●
15
µV/°C
IOS
VCM = 18V (Note 5)
●
●
3
2
nA
µA
VCM = 18V (Note 5)
●
●
30
25
nA
µA
18
V
IB
MIN
LT1782H
TYP
MAX
VOS
CONDITIONS
Input Offset Voltage
400
Input Offset Current
Input Bias Current
Input Voltage Range
CMRR
Common Mode Rejection Ratio
VCM = 0.3V to VCC – 1V
VCM = 0.3V to 18V
AVOL
Large-Signal Voltage Gain
VS = 3V, VO = 500mV to 2.5V, RL = 10k
●
0.3
●
●
76
60
200
50
1500
●
V/mV
V/mV
400
80
1500
●
V/mV
V/mV
VS = 5V, VO = 500mV to 4.5V, RL = 10k
dB
dB
VOL
Output Voltage Swing LOW
No Load
ISINK = 5mA
VS = 5V, ISINK = 10mA
●
●
●
VOH
Output Voltage Swing HIGH
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
●
●
2.85
2.20
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
●
●
4.85
3.80
V
V
VS = 3V to 12.5V, VCM = VO = 1V
●
80
dB
●
2.7
V
●
18
V
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
IS = – 100µA
15
900
1500
mV
mV
mV
5
LT1782
ELECTRICAL CHARACTERISTICS
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, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4)
SYMBOL PARAMETER
IS
ISHDN
CONDITIONS
MIN
LT1782H
TYP
MAX
UNITS
●
55
100
µA
µA
25
µA
12
nA
µA
3
µA
Supply Current
40
Supply Current, SHDN
VPIN5 = 2V, No Load (Note 10)
●
Shutdown Pin Current
VPIN5 = 0.3V, No load (Note 10)
VPIN5 = 2V, No Load (Note 10)
●
●
Output Leakage Current
VPIN5 = 2V, No Load (Note 10)
●
0.5
Maximum Shutdown Pin Current
VPIN5 = 18V, No Load
●
45
µA
VL
Shutdown Pin Input Low Voltage
(Note 10)
●
0.3
V
VH
Shutdown Pin Input High Voltage
(Note 10)
●
2
GBW
Gain Bandwidth Product
f = 10kHz (Note 5)
110
65
200
●
kHz
kHz
0.035
0.020
0.07
●
V/µs
V/µs
SR
Slew Rate
AV = –1, RL = ∞ (Note 7)
V
The ● denotes 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)
SYMBOL PARAMETER
UNITS
●
900
3.2
µV
mV
∆VOS/∆T Input Offset Voltage Drift (Note 9)
●
15
µV/°C
IOS
Input Offset Current
●
3
nA
IB
Input Bias Current
●
30
nA
CMRR
Common Mode Rejection Ratio
VCM = –4.7V to 13V
AVOL
Large-Signal Voltage Gain
VS = ±4V, RL = 10k
VO
PSRR
Input Offset Voltage
500
ISHDN
●
60
dB
●
55
20
±4.85
±4.10
±3.50
V
V
V
150
V/mV
V/mV
Output Voltage Swing
No Load
ISINK = ±5mA
ISINK = ±10mA
●
●
●
Power Supply Rejection Ratio
VS = ±1.5V to ±9V
●
80
dB
●
±1.35
V
Minimum Supply Voltage
IS
MIN
LT1782H
TYP
MAX
VOS
CONDITIONS
●
60
110
µA
µA
25
µA
12
nA
µA
45
µA
Supply Current
45
Supply Current, SHDN
VPIN5 = – 3V, VS = ±5V, No Load (Note 10)
●
Shutdown Pin Current
VPIN5 = – 4.7V, VS = ±5V, No load (Note 10)
VPIN5 = – 3V, VS = ±5V, No Load (Note 10)
●
●
Maximum Shutdown Pin Current
VPIN5 = 9V, VS = ±9V, No Load (Note 10)
●
0.5
Output Leakage Current
VPIN5 = –7V, VS = ±9V, No Load
●
3
µA
VL
Shutdown Pin Input Low Voltage
VS = ±5V
●
– 4.7
V
VH
Shutdown Pin Input High Voltage
VS = ±5V
●
–3
GBW
Gain Bandwidth Product
f = 5kHz
120
70
225
●
kHz
kHz
0.0375
0.0220
0.075
●
V/µs
V/µs
SR
6
Slew Rate
AV = –1, RL = ∞, VO = ±4V
Measured at VO = ±2V
V
LT1782
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum.
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 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 5: VS = 5V limits are guaranteed by correlation to VS = 3V and
VS = ±5V or VS = ±9V tests.
Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and
VS = ±5V or VS = ±9V tests.
Note 7: Guaranteed by correlation to slew rate at VS = ±5V, and GBW at
VS = 3V and VS = ±5V tests.
Note 8: This specification implies a typical input offset voltage of 1.8mV at
VCM = 18V and a maximum input offset voltage of 7.2mV at VCM = 18V.
Note 9: This parameter is not 100% tested.
Note 10: Specifications apply to 6-lead SOT-23 with shutdown.
Note 11: Full-power bandwidth is calculated for the slew rate.
FPBW = SR/2πVP.
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TYPICAL PERFOR A CE CHARACTERISTICS
400
TA = 125°C
45
40
TA = 25°C
35
TA = –55°C
30
25
5
VS = 5V, 0V
300
4
200
100
VOUT (V)
INPUT OFFSET VOLTAGE CHANGE (µV)
50
SUPPLY CURRENT (µA)
Output Voltage vs Large Input
Voltage
Minimum Supply Voltage
Supply Current vs Supply Voltage
0
TA = 125°C
TA = –55°C
–100
2
4
6
8
10 12 14
SUPPLY VOLTAGE (V)
16
18
1782 G01
5V
2
VIN
TA = 25°C
–200
1
+
–
–300
–400
20
3
0
1
2
3
4
TOTAL SUPPLY VOLTAGE (V)
5
1782 G02
0
–10–8 –6 –4 –2 0 2 4 6 8 10 12 14 16 18
VIN (V)
1782 G02a
7
LT1782
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TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current vs Common
Mode Voltage
1
1
OUTPUT SATURATION VOLTAGE (V)
VS = 5V, 0V
5000
TA = 125°C
4000
3000
2000
TA = 25°C
1000
40
30
TA = –55°C
20
10
VS = ±2.5V
VOD = 30mV
OUTPUT SATURATION VOLTAGE (V)
6000
INPUT BIAS CURRENT (nA)
Output Saturation Voltage vs Load
Current (Output Low)
Output Saturation Voltage vs Load
Current (Output High)
TA = 125°C
0.1
TA = 25°C
TA = –55°C
VS = ±2.5V
VOD = 30mV
TA = 125°C
0.1
TA = –55°C
TA = 25°C
0.01
0
0.01
1µ
–10
15 16 18
3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4
COMMON MODE VOLTAGE (V)
0.001
10µ
100µ
1m
SOURCING LOAD CURRENT (A)
Output Saturation Voltage vs
Input Overdrive
OUTPUT SATURATION VOLTAGE (mV)
0.1Hz to 10Hz Noise Voltage
40
VS = ±5V
OUTPUT HIGH
VS = ±2.5V
10
OUTPUT LOW
1
10
SINKING CURRENT
30
SOURCING CURRENT
25
20
VS = ±2.5V
NO LOAD
0
20
30
40
50
INPUT OVERDRIVE (mV)
15
–50
60
–25
0
25
50
75
TEMPERATURE (°C)
1782 G06
100
125
0
80
30
10
100
1k
FREQUENCY (Hz)
10k
1782 G08
7
8
9
70
VS = ±2.5V
0.35
50
0.30
80
60
PHASE
40
0.25
0.20
40
30
20
GAIN
20
0
10
–20
0
–40
–10
–60
0.05
–20
–80
0
–30
0.15
0.10
1
10
100
1k
FREQUENCY (Hz)
10k
1782 G09
10
100
VS = ±2.5V
60
GAIN (dB)
INPUT NOISE CURRENT DENSITY (pA/√Hz)
40
4 5 6
TIME (sec)
1k
10k
100k
FREQUENCY (Hz)
PHASE SHIFT (DEG)
50
3
Gain and Phase Shift vs
Frequency
0.40
60
2
1782 G07
Input Noise Current vs Frequency
70
1
1782 G06a
Noise Voltage Density vs
Frequency
8
NOISE VOLTAGE (400nV/DIV)
OUTPUT CURRENT (mA)
35
1
10m
1782 G05
Output Short-Circuit Current vs
Temperature
100
20
10µ
1µ
1m
SINKING LOAD CURRENT (A)
1µ
1782 G04
1782 G03
INPUT NOISE VOLTAGE DENSITY (nV/√Hz)
10m
–100
1M
1782 G10
LT1782
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth Product vs
Temperature
60
0.11
f = 5kHz
VS = ±2.5V
VS = ±2.5V
0.10
200
190
180
GAIN BAINDWIDTH PRODUCT (kHz)
210
0.09
0.08
FALLING
0.07
0.06
0.05
–25
0
25
50
75
TEMPERATURE (°C)
100
0.04
–50
125
–25
0
25
50
75
TEMPERATURE (°C)
100
1782 G11
60
50
POWER SUPPLY REJECTION RATIO (dB)
GAIN BANDWIDTH PRODUCT (kHz)
200
GAIN BANDWIDTH PRODUCT
150
100
10k
LOAD RESISTANCE (Ω)
60
50
POSITIVE SUPPLY
40
30
20
10
NEGATIVE SUPPLY
0
VS = ±2.5V
100
90
80
70
60
50
40
1M
1k
Settling Time to 0.1% vs Output
Step
4
VS = ±2.5V
VPIN5 (SHUTDOWN) = 2.5V
3
100k
AV = 1
AV = –1
2
OUTPUT STEP (V)
OUTPUT IMPEDANCE (Ω)
AV = 1
100k
1782 G16
1M
AV = 10
10k
FREQUENCY (Hz)
1782 G15
Disabled Output Impedance vs
Frequency (Note 8)
AV = 100
18
30
10k
100k
FREQUENCY (Hz)
1k
VS = ±2.5V
10
4
6
8 10 12 14 16
TOTAL SUPPLY VOLTAGE (V)
CMRR vs Frequency
70
100k
10k
100
2
0
1782 G13
VS = ±2.5V
80
Output Impedance vs Frequency
OUTPUT IMPEDANCE (Ω)
160
125
110
1782 G14
1k
AV = –1
RF = RG = 10k
f = 5kHz
180
–10
50
1k
GAIN BANDWIDTH PRODUCT
200
90
PHASE MARGIN (DEG)
250
220
PSRR vs Frequency
70
VS = ±2.5V
AV = –1
RF = RG = 10k
f = 5kHz
50
1782 G12
Gain Bandwidth Product and
Phase Margin vs Load Resistance
PHASE MARGIN
240
COMMON MODE REJECTION RATIO (dB)
170
–50
55
PHASE MARGIN
RISING
SLEW RATE (V/µs)
220
PHASE MARGIN (DEG)
230
GAIN BANDWIDTH (kHz)
Gain Bandwidth Product and
Phase Margin vs Supply Voltage
Slew Rate vs Temperature
10k
1k
1
VS = ±5V
0
–1
–2
1
AV = 1
AV = –1
–3
0.1
100
1k
10k
100k
FREQUENCY (Hz)
1M
1782 G17
100
100
1k
10k
100k
FREQUENCY (Hz)
1M
1782 G17a
–4
25
30
35
40
50
60
SETTLING TIME (µs)
70
80
1782 G18
9
LT1782
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Capacitive Load Handling
Overshoot vs Capacitive Load
OUTPUT SWING (VP-P)
25
20
AV = 1
15
AV = 5
10
VS = ±5V
10
30
AV = 10
5
DISTORTION ≤ 1%
AV = 1
8
THD + NOISE (%)
VS = 5V, 0V
VCM = 2.5V
35
6
4
VS = ±1.5V
VS = 3V, 0V
VOUT = 2VP-P
VCM = 1.2V
RL = 10k
0.1
AV = –1
RF = RG = 100k
0.010
2
AV = 1
10
100
1000
CAPACITIVE LOAD (pF)
0.001
0
100
0
10000
1k
10k
FREQUENCY (Hz)
100k
10
10
f = 1kHz, RL = 10k
VS = 3V TOTAL
AV = 1
VIN = 2VP-P AT 1kHz
THD + NOISE (%)
VS = 3V, 0V
VIN = 0.5V TO 2.5V
0.01
AV = –1, RF = RG = 100k
VS = ±1.5V
VCM = 0V
0.1
0.01
VS = 3V, 0V
VIN = 0.2V TO 2.2V
0.001
100
AV = 1
VS = ±1.5V
VCM = 0V
1
0.1
AV = 1
VS = 3V. 0V
VCM = 1.5V
0.001
1k
10k
LOAD RESISTANCE TO GROUND (Ω)
100k
0
AV = –1, RF = RG = 100k
VS = 3V, 0V
VCM = 1.5V
1
2
OUTPUT VOLTAGE AMPLITUDE (VP-P)
1782 G22
Supply Current vs Shutdown
Voltage
10k
1782 G21
Total Harmonic Distortion + Noise
vs Output Voltage Amplitude
Total Harmonic Distortion + Noise
vs Load Resistance
VS = ±1.5V
VIN = ±1V
1k
100
FREQUENCY (Hz)
1782 G20
1782 G19
1
10
Open-Loop Gain
INPUT OFFSET VOLTAGE CHANGE (50µV/DIV)
OVERSHOOT (%)
1
12
40
THD + NOISE (%)
Total Harmonic Distortion + Noise
vs Frequency
Undistorted Output Swing vs
Frequency
3
VS = ±5V
RL = 10k
RL = 50k
RL = 2k
–6 –5 –4 –3 –2 –1 0 1 2 3
OUTPUT VOLTAGE (V)
1782 G23
4
5
6
1782 G24
Small-Signal Response
Large-Signal Response
50
VS = 5V, 0V
TA = 125°C
SUPPLY CURRENT (µA)
40
TA = 25°C
30
TA = –55°C
20
10
0
0
0.5
1
1.5
2
SHUTDOWN PIN VOLTAGE (V)
2.5
1782 G25
10
VS = ±5V
AV = 1
CL = 15pF
1782 G26
VS = ±5V
AV = 1
CL = 15pF
1782 G27
LT1782
U
W
U U
APPLICATIO S I FOR ATIO
Supply Voltage
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.
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.
Inputs
The LT1782 has 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
–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 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 1.8mV.
A Schottky diode in the collector of the input NPN transistors, along with special geometries for these NPN transistors, allows the LT1782 to operate 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 4µA at room temperature. The input offset voltage is typically 1.8mV when operating above 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
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
inputs up to 9V below V –. There are no clamping diodes
between the inputs and the maximum differential input
voltage is 18V.
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
LT1782 can sink and source over 30mA at ±5V supplies,
sourcing current is reduced to 10mA at 3V total supplies
as noted in the Electrical Characteristics.
The LT1782 is internally compensated to drive at least
600pF 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 to distortion in op amps:
output crossover distortion as the output transitions from
sourcing to sinking current, and distortion caused by
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,
11
LT1782
U
W
U U
APPLICATIO S I FOR ATIO
typically 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 the input voltage swing between ground
and (V + – 0.8V). See the Typical Performance Characteristics curves, “Total Harmonic Distortion + Noise vs Ouput
Voltage Amplitude.”
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes perfor-
mance 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.
Shutdown
The 6-lead part includes a shutdown feature that disables
the part, reducing quiescent current and making the output
high impedance. The part can be shut down by bringing the
SHDN pin 1.2V or more above V –. When shut down, the
supply current is about 5µA and the output leakage current
is less than 1µA (V – ≤ VOUT ≤ V +). In normal operation, the
SHDN pin can be tied to V – or left floating. See the Typical
Performance Characteristics curves, “Supply Current vs
Shutdown Pin Voltage.”
W
W
SI PLIFIED SCHE ATIC
V+
Q2
Q1
Q3
SHDN
R1
30k
R2
6k
Q4
Q19
– IN
Q17
+
J1
Q7
R3
6k
2µA
Q8
Q11
OUT
Q16
Q9
Q5
Q18
Q15
Q26
Q24
Q20
Q12
+IN
Q25 Q23
Q22
D3
D1
Q6
D4
D5
Q10
Q13
Q14
R4
40k
Q21
R5
40k
V–
1782 SS
12
LT1782
U
TYPICAL APPLICATIO S
Protected Fault Conditions
OK!
–18V
OK!
5V
V+
LT1782
LT1782
+
24V
REVERSE BATTERY
OK!
5V
OK!
5V
+
LT1782
LT1782
10V
INPUT DIFFERENTIAL VOLTAGE
+
18V
INPUT OVERVOLTAGE
INPUT BELOW GROUND
1782 TA03
Compact, High Output Current, Low Dropout, Precision 2.5V Supply
VS
2.8V to 3.3V
SUPPLY CURRENT ≅ 120µA, NO LOAD
22Ω
5%
1k
5%
+
680Ω
5%
LT1782
–
100k
5%
VISHAY
SILICONIX
Si3445DV
0.1µF
LT1790-2.5
1µF
1782 TA04
VOUT
2.5V
ILOAD = 0mA TO 300mA
NOTE: NOT CURRENT LIMITED
13
LT1782
U
PACKAGE DESCRIPTIO
S5 Package
5-Lead Plastic SOT-23
(LTC DWG # 05-08-1633)
(LTC DWG # 05-08-1635)
2.80 – 3.10
(.110 – .118)
(NOTE 3)
A
SOT-23
(Original)
.90 – 1.45
(.035 – .057)
SOT-23
(ThinSOT)
1.00 MAX
(.039 MAX)
A1
.00 – .15
(.00 – .006)
.01 – .10
(.0004 – .004)
A2
.90 – 1.30
(.035 – .051)
.80 – .90
(.031 – .035)
L
.35 – .55
(.014 – .021)
.30 – .50 REF
(.012 – .019 REF)
2.60 – 3.00
(.102 – .118)
1.50 – 1.75
(.059 – .069)
(NOTE 3)
PIN ONE
.95
(.037)
REF
.25 – .50
(.010 – .020)
(5PLCS, NOTE 2)
.20
(.008)
A
DATUM ‘A’
L
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
.09 – .20
(.004 – .008)
(NOTE 2)
3. DRAWING NOT TO SCALE
4. DIMENSIONS ARE INCLUSIVE OF PLATING
5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
6. MOLD FLASH SHALL NOT EXCEED .254mm
7. PACKAGE EIAJ REFERENCE IS:
SC-74A (EIAJ) FOR ORIGINAL
JEDEL MO-193 FOR THIN
14
A2
1.90
(.074)
REF
A1
S5 SOT-23 0401
LT1782
U
PACKAGE DESCRIPTIO
S6 Package
6-Lead Plastic SOT-23
(LTC DWG # 05-08-1634)
(LTC DWG # 05-08-1636)
2.80 – 3.10
(.110 – .118)
(NOTE 3)
SOT-23
(Original)
SOT-23
(ThinSOT)
A
.90 – 1.45
(.035 – .057)
1.00 MAX
(.039 MAX)
A1
.00 – 0.15
(.00 – .006)
.01 – .10
(.0004 – .004)
A2
.90 – 1.30
(.035 – .051)
.80 – .90
(.031 – .035)
L
.35 – .55
(.014 – .021)
.30 – .50 REF
(.012 – .019 REF)
2.60 – 3.00
(.102 – .118)
1.50 – 1.75
(.059 – .069)
(NOTE 3)
PIN ONE ID
.95
(.037)
REF
.25 – .50
(.010 – .020)
(6PLCS, NOTE 2)
.20
(.008)
A
DATUM ‘A’
L
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
.09 – .20
(.004 – .008)
(NOTE 2)
A2
1.90
(.074)
REF
A1
S6 SOT-23 0401
3. DRAWING NOT TO SCALE
4. DIMENSIONS ARE INCLUSIVE OF PLATING
5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
6. MOLD FLASH SHALL NOT EXCEED .254mm
7. PACKAGE EIAJ REFERENCE IS:
SC-74A (EIAJ) FOR ORIGINAL
JEDEL MO-193 FOR THIN
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.
15
LT1782
U
TYPICAL APPLICATIO S
Current Source
VCC
LT1634-1.25
R1
+
LT1782
2N3906
–
IOUT =
1.25V
R1
1782 TA02
Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier
Programmable Gain Amplifier Frequency Response
30
VCC
25
AV = 2
SHDN
15
VCC
+
IN
OUT
LT1784
SHDN
VCC
–
VEE
–
R1
10k
AV = 1+
OR
5
AV = 2
0
–10
LT1782
R2
9.09k
10
–5
+
VEE
AV = 20
20
GAIN (dB)
AV = 20
1+
(
(
R1 + R2
R3
R1
R2 + R3
–15
)
)
–20
1k
10k
100k
1M
FREQUENCY (Hz)
10M
1782 TA05b
R3
1k
1782 TA05a
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, VCM Extends 44V Above VEE, Independent of
VCC, 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
170µA Supply Current, Single Supply Input Range: –0.4V to 44V,
Rail-to-Rail Input and Output
16
Linear Technology Corporation
1782fa LT/TP 0501 1.5K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1999
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