LT1782IS6 [Linear]
Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp; 微功耗，过度的顶级SOT -23 ，轨至轨输入和输出运算放大器
| 型号： | LT1782IS6 |
| 厂家： | 
Linear |
| 描述： | Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp |
| 文件： | 总16页 (文件大小：257K) |
| 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
U
FEATURES
■
DESCRIPTIO
Operates with Inputs Above V+
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
drawslessthan55µAofquiescentcurrentandhasreverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
■
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
The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-TopTM 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.
U
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-23packages.Forapplicationsrequiringhigherspeed,
refer to the LT1783.
APPLICATIO S
■
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.
■
U
TYPICAL APPLICATIO
Distribution of Input Offset Voltage
25
Positive Supply Rail Current Sense
V
V
= 5V, 0V
= 2.5V
S
+
V
CM
20
15
10
5
5V TO 18V
200Ω
5V
0.2Ω
+
MMBT3904
LT1782
200Ω
V
= 2Ω(I
)
LOAD
–
OUT
0V TO 4.3V
I
2k
LOAD
LOAD
0
–900 –600 –300
0
300
600
900
1782 TA01
INPUT OFFSET VOLTAGE (µV)
1782 TA01a
1
LT1782
ABSOLUTE AXI U RATI GS
W W U W
(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)
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
LT1782C............................................ –40°C to 85°C
LT1782I ............................................. –40°C to 85°C
LT1782H ......................................... –40°C to 125°C
U W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
TOP VIEW
LT1782CS5
LT1782IS5
LT1782HS5
LT1782CS6
LT1782IS6
LT1782HS6
+
+
V
1
2
3
5
4
OUT 1
–
6
5
4
OUT
V
–
SHDN
–IN
V
2
V
+IN
–IN
+IN 3
S5 PART MARKING
S6 PART MARKING
S5 PACKAGE
5-LEAD PLASTIC SOT-23
S6 PACKAGE
6-LEAD PLASTIC SOT-23
LTIS
LTIT
LTXL
LTLD
LTLE
LTXK
TJMAX = 150°C, θJA = 250°C/ W
TJMAX = 150°C, θJA = 230°C/ W
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.
LT1782C/LT1782I
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
T = 25°C
MIN
TYP
MAX
UNITS
V
400
800
950
µV
µV
µV
OS
A
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
1100
A
∆V /∆T Input Offset Voltage Drift (Note 7)
OS
●
2
5
µV/°C
I
Input Offset Current
●
●
0.7
2
1
nA
µA
OS
V
V
= 18V (Note 5)
= 18 (Note 5)
CM
CM
I
Input Bias Current
●
●
8
6
0.1
15
12
nA
µA
nA
B
SHDN or V = 0V, V = 0V to 18V
S
CM
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
Input Noise Voltage Density
Input Noise Current Density
50
nV/√Hz
pA/√Hz
n
i
f = 1kHz
0.05
n
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.
LT1782C/LT1782I
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R
IN
Input Resistance
Differential
Common Mode, V = 0V to (V – 1V)
Common Mode, V = 0V to 18V
●
●
3.4
6.5
5
3
MΩ
GΩ
MΩ
CM
CC
1.5
CM
C
Input Capacitance
5
pF
V
IN
Input Voltage Range
●
0
18
CMRR
PSRR
Common Mode Rejection Ratio
(Note 5)
V
V
= 0V to V – 1V
= 0V to 18V (Note 8)
●
●
90
68
100
80
dB
dB
CM
CM
CC
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V = 3V to 12.5V, V = V = 1V
●
90
100
dB
S
CM
O
A
V = 3V, V = 500mV to 2.5V, R = 10k
V = 3V, 0°C ≤ T ≤ 70°C
V = 3V, –40°C ≤ T ≤ 85°C
200
133
100
1500
V/mV
V/mV
V/mV
VOL
S
O
L
●
●
S
A
S
A
V = 5V, V = 500mV to 4.5V, R = 10k
400
250
200
1500
V/mV
V/mV
V/mV
S
O
L
V = 5V, 0°C ≤ T ≤ 70°C
●
●
S
A
V = 5V, –40°C ≤ T ≤ 85°C
S
A
V
V
Output Voltage Swing LOW
Output Voltage Swing HIGH
No Load
●
●
●
3
200
400
8
500
800
mV
mV
mV
OL
OH
I
= 5mA
SINK
V = 5V, I
S
= 10mA
SINK
V = 3V, No Load
●
●
2.91
2.6
2.94
2.8
V
V
S
V = 3V, I
S
= 5mA
SOURCE
V = 5V, No Load
●
●
4.91
4.5
4.94
4.74
V
V
S
V = 5V, I
= 10mA
S
SOURCE
I
Short-Circuit Current (Note 2)
V = 3V, Short to GND
5
15
10
30
mA
mA
SC
S
V = 3V, Short to V
S
CC
V = 5V, Short to GND
15
20
30
40
mA
mA
S
V = 5V, Short to V
S
CC
Minimum Supply Voltage
Reverse Supply Voltage
●
●
2.7
18
V
V
I = –100µA
S
I
I
Supply Current
(Note 6)
40
5
55
60
65
µA
µA
µA
S
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
Supply Current, SHDN
Shutdown Pin Current
V
= 2V, No Load (Note 10)
●
15
µA
PIN5
V
V
V
= 0.3V, No load (Note 10)
= 2V, No Load (Note 10)
= 5V, No Load (Note 10)
●
●
●
0.5
2
5
nA
µA
µA
SHDN
PIN5
PIN5
PIN5
8
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
V
= 5V to 0V, R = 10k (Note 10)
100
6
µs
µs
ON
OFF
PIN5
PIN5
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
●
●
A
–40°C ≤ T ≤ 85°C
A
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.
LT1782C/LT1782I
SYMBOL PARAMETER
CONDITIONS
A = –1, R = ∞
MIN
TYP
MAX
UNITS
SR
Slew Rate
(Note 5)
0.035
0.031
0.028
0.07
V/µs
V/µs
V/µs
V
L
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
t
Settling Time
V = 5V, ∆V
= 2V to 0.1%, A = –1
45
0.003
11
µs
%
S
S
OUT
V
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
= 2V
kHz
OUT
P–P
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.
LT1782C/LT1782I
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
T = 25°C
MIN
TYP
MAX
UNITS
V
500
900
1050
1200
µV
µV
µV
OS
A
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
∆V /∆T Input Offset Voltage Drift (Note 7)
●
●
●
●
2
0.7
8
5
2
µV/°C
nA
OS
I
I
Input Offset Current
Input Bias Current
OS
B
15
nA
Input Bias Current Drift
Input Noise Voltage
0.01
1
nA/°C
0.1Hz to 10Hz
f = 1kHz
µV
P-P
e
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
50
nV/√Hz
pA/√Hz
n
i
f = 1kHz
0.05
n
R
Differential
Common Mode, V = –5V to 13V
●
●
3.4
1.5
6.5
3
MΩ
MΩ
IN
CM
C
Input Capacitance
5
pF
V
IN
Input Voltage Range
●
●
–5
68
13
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
= –5V to 13V
80
dB
CM
A
V
V
V = ±4V, R = 10k
0°C ≤ T ≤ 70°C
–40°C ≤ T ≤ 85°C
55
40
30
150
V/mV
V/mV
V/mV
VOL
O
L
●
●
A
A
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current (Note 2)
No Load
●
●
●
–4.997 –4.992
–4.8
–4.6
V
V
V
OL
I
I
= 5mA
= 10mA
–4.5
–4.2
SINK
SINK
No Load
●
●
●
4.91
4.6
4.5
4.94
4.8
4.74
V
V
V
OH
I
I
= 5mA
= 10mA
SOURCE
SOURCE
I
Short to GND
0°C ≤ T ≤ 70°C
18
15
30
mA
mA
SC
●
●
A
PSRR
Power Supply Rejection Ratio
Supply Current
V = ±1.5V to ±9V
90
100
45
dB
S
I
60
65
70
µA
µA
µA
S
0°C ≤ T ≤ 70°C
–40°C ≤ T ≤ 85°C
●
●
A
A
Supply Current, SHDN
Shutdown Pin Current
V
= –3V, V = ±5V, No Load (Note 10)
●
6
20
µA
PIN5
S
I
V
V
= –4.7V, V = ±5V, No load (Note 10)
●
●
0.5
2
nA
µA
SHDN
PIN5
PIN5
S
= –3V, V = ±5V, No Load (Note 10)
8
S
4
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.
LT1782C/LT1782I
SYMBOL PARAMETER
Maximum Shutdown Pin Current
CONDITIONS
MIN
TYP
MAX
UNITS
µA
µA
V
V
V
= 9V, V = ±9V (Note 10)
●
●
●
●
●
●
10
30
1
PIN5
PIN5
S
Shutdown Output Leakage Current
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
= –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
V
= 0V to –5V, R = 10k (Note 10)
100
6
µs
ON
OFF
PIN5
PIN5
L
Turn-Off Time
= –5V to 0V, R = 10k (Note 10)
µs
L
GBW
Gain Bandwidth Product
f = 5kHz
0°C ≤ T ≤ 70°C
120
110
100
225
kHz
kHz
kHz
●
●
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
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
t
Settling Time
∆V
= 4V to 0.1%, A = 1
50
3
µs
S
OUT
V
FPBW
Full-Power Bandwidth (Note 9)
V
= 8V
kHz
OUT
P–P
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)
LT1782H
TYP
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
MIN
MAX
UNITS
V
400
800
3
µV
mV
OS
●
●
∆V /∆T Input Offset Voltage Drift
OS
15
µV/°C
I
Input Offset Current
●
●
3
2
nA
µA
OS
V
V
= 18V (Note 5)
= 18V (Note 5)
CM
CM
I
Input Bias Current
●
●
30
25
nA
µA
B
Input Voltage Range
●
0.3
18
V
CMRR
Common Mode Rejection Ratio
V
V
= 0.3V to V – 1V
= 0.3V to 18V
●
●
76
60
dB
dB
CM
CM
CC
A
Large-Signal Voltage Gain
V = 3V, V = 500mV to 2.5V, R = 10k
200
50
1500
1500
V/mV
V/mV
VOL
S
O
L
●
V = 5V, V = 500mV to 4.5V, R = 10k
400
80
V/mV
V/mV
S
O
L
●
V
V
Output Voltage Swing LOW
Output Voltage Swing HIGH
No Load
●
●
●
15
900
1500
mV
mV
mV
OL
OH
I
= 5mA
SINK
V = 5V, I
S
= 10mA
SINK
V = 3V, No Load
●
●
2.85
2.20
V
V
S
V = 3V, I
S
= 5mA
SOURCE
V = 5V, No Load
●
●
4.85
3.80
V
V
S
V = 5V, I
= 10mA
S
SOURCE
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
V = 3V to 12.5V, V = V = 1V
●
●
●
80
2.7
18
dB
V
S
CM
O
I = –100µA
S
V
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)
LT1782H
TYP
SYMBOL PARAMETER
CONDITIONS
MIN
MAX
UNITS
I
I
Supply Current
40
55
µA
µA
S
●
●
100
Supply Current, SHDN
Shutdown Pin Current
V
= 2V, No Load (Note 10)
25
µA
PIN5
V
V
= 0.3V, No load (Note 10)
= 2V, No Load (Note 10)
●
●
0.5
nA
µA
SHDN
PIN5
PIN5
12
3
Output Leakage Current
V
V
= 2V, No Load (Note 10)
= 18V, No Load
●
●
●
●
µA
µA
V
PIN5
PIN5
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
●
●
SR
Slew Rate
A = –1, R = ∞ (Note 7)
0.035
0.020
0.07
V/µs
V/µs
V
L
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)
LT1782H
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
MIN
TYP
MAX
UNITS
V
500
900
3.2
µV
mV
OS
●
●
●
●
●
∆V /∆T Input Offset Voltage Drift (Note 9)
OS
15
3
µV/°C
nA
I
I
Input Offset Current
OS
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
55
20
150
V/mV
V/mV
VOL
S
L
●
V
Output Voltage Swing
No Load
●
●
●
±4.85
±4.10
±3.50
V
V
V
O
I
I
= ±5mA
SINK
SINK
= ±10mA
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Supply Current
V = ±1.5V to ±9V
●
●
80
dB
V
S
±1.35
I
I
45
60
µA
µA
S
●
●
110
Supply Current, SHDN
Shutdown Pin Current
V
= –3V, V = ±5V, No Load (Note 10)
25
µA
PIN5
S
V
V
= –4.7V, V = ±5V, No load (Note 10)
●
●
0.5
nA
µA
SHDN
PIN5
PIN5
S
= –3V, V = ±5V, No Load (Note 10)
12
45
S
Maximum Shutdown Pin Current
Output Leakage Current
V
V
= 9V, V = ±9V, No Load (Note 10)
●
●
●
●
µA
µA
V
PIN5
PIN5
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
●
●
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
6
LT1782
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
Note 5: V = 5V limits are guaranteed by correlation to V = 3V and
S S
of a device may be impaired.
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 6: V = 3V limits are guaranteed by correlation to V = 5V and
S S
V = ±5V or V = ±9V 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 7: Guaranteed by correlation to slew rate at V = ±5V, and GBW at
S
V = 3V and V = ±5V tests.
S
S
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.
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 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/2πV .
P
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Voltage vs Large Input
Voltage
Minimum Supply Voltage
Supply Current vs Supply Voltage
400
300
50
45
40
35
30
25
20
5
4
3
2
1
0
V
= 5V, 0V
S
T
= 125°C
A
200
100
T
T
= 25°C
A
A
0
= –55°C
T
A
= 125°C
T
T
= –55°C
= 25°C
A
5V
–100
–200
–300
–400
+
–
V
IN
A
0
1
2
3
4
5
2
4
6
8
10 12 14 16 18
–10–8 –6 –4 –2 0
2
V
4
6
8 10 12 14 16 18
TOTAL SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
(V)
IN
1782 G02
1782 G01
1782 G02a
7
LT1782
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Output Saturation Voltage vs Load
Current (Output Low)
Input Bias Current vs Common
Output Saturation Voltage vs Load
Mode Voltage
Current (Output High)
1
0.1
1
6000
5000
4000
3000
2000
1000
V
V
= ±2.5V
V
S
= 5V, 0V
V
V
= ±2.5V
S
S
= 30mV
= 30mV
OD
OD
T
A
= 125°C
T
= 125°C
A
T
= 125°C
T
A
= 25°C
A
0.1
T
= –55°C
A
T
= 25°C
T
= –55°C
T
= 25°C
A
A
A
40
30
0.01
0.001
T
= –55°C
A
20
10
0
0.01
–10
1µ
10µ
100µ
1m
10m
1µ
10µ
1µ
1m
10m
3.8
4
4.2 4.4 4.6 4.8
5
5.2 5.4
15 16 18
SOURCING LOAD CURRENT (A)
SINKING LOAD CURRENT (A)
COMMON MODE VOLTAGE (V)
1782 G05
1782 G04
1782 G03
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
–50 –25
0
25
50
75 100 125
0
10
20
30
40
50
60
0
1
2
3
4
5
6
7
8
9
10
INPUT OVERDRIVE (mV)
TEMPERATURE (°C)
TIME (sec)
1782 G06
1782 G06a
1782 G07
Noise Voltage Density vs
Frequency
Gain and Phase Shift vs
Frequency
Input Noise Current vs Frequency
80
70
60
50
40
30
20
70
60
100
80
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
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 G10
1782 G08
1782 G09
8
LT1782
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth Product and
Phase Margin vs Supply Voltage
Gain Bandwidth Product vs
Temperature
Slew Rate vs Temperature
60
55
50
230
220
210
200
190
180
170
0.11
0.10
0.09
0.08
0.07
0.06
0.05
0.04
f = 5kHz
S
V = ±2.5V
S
V
= ±2.5V
PHASE MARGIN
RISING
240
220
200
180
160
FALLING
GAIN BANDWIDTH PRODUCT
A
= –1
V
R = R = 10k
G
F
f = 5kHz
0
2
4
6
8
10 12 14 16 18
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TOTAL SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
1782 G13
1782 G11
1782 G12
Gain Bandwidth Product and
Phase Margin vs Load Resistance
PSRR vs Frequency
CMRR vs Frequency
90
80
70
60
50
40
30
20
10
0
110
100
90
70
60
50
V
S
= ±2.5V
V
= ±2.5V
S
PHASE MARGIN
V
A
= ±2.5V
S
V
F
80
= –1
POSITIVE SUPPLY
250
200
150
100
50
R
= R = 10k
G
70
f = 5kHz
60
GAIN BANDWIDTH PRODUCT
50
NEGATIVE SUPPLY
10k
40
–10
30
1k
100k
1M
1k
10k
100k
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
1782 G15
1782 G14
1782 G16
Disabled Output Impedance vs
Frequency (Note 8)
Settling Time to 0.1% vs Output
Step
Output Impedance vs Frequency
1M
100k
10k
1k
10k
1k
4
V
V
= ±2.5V
PIN5
V
= ±2.5V
S
S
3
2
(SHUTDOWN) = 2.5V
A
= 1
A = –1
V
V
A
= 100
V
1
A
= 10
100
10
V
V
= ±5V
0
S
A
= 1
1k
–1
–2
–3
–4
V
1
A
= 1
A = –1
V
V
100
100
0.1
100
1k
10k
100k
1M
10k
FREQUENCY (Hz)
100k
1M
25
30
35
40
50
60
70
80
FREQUENCY (Hz)
SETTLING TIME (µs)
1782 G17a
1782 G17
1782 G18
9
LT1782
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Capacitive Load Handling
Undistorted Output Swing vs
Frequency
Total Harmonic Distortion + Noise
vs Frequency
Overshoot vs Capacitive Load
1
12
10
8
40
35
30
25
20
15
10
5
V
V
V
= 3V, 0V
= 2V
DISTORTION ≤ 1%
= 1
V
V
= 5V, 0V
= 2.5V
S
OUT
S
CM
V
= ±5V
S
A
V
P-P
= 1.2V
CM
R
L
= 10k
0.1
6
A
= 1
V
A
= –1
V
F
4
0.010
0.001
R = R = 100k
V
= ±1.5V
A
= 5
G
S
V
A
= 10
2
V
A
= 1
V
0
0
100
1k
10k
100k
10
100
1k
10k
10
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
CAPACITIVE LOAD (pF)
1782 G20
1782 G19
1782 G21
Total Harmonic Distortion + Noise
vs Output Voltage Amplitude
Total Harmonic Distortion + Noise
vs Load Resistance
Open-Loop Gain
10
1
10
1
f = 1kHz, R = 10k
L
V
A
V
= 3V TOTAL
= 1
V
= ±5V
S
V
S
= 2V AT 1kHz
A
V
V
= 1
A
V
V
= –1, R = R = 100k
F G
IN
P-P
V
S
V
S
= ±1.5V
= 0V
= ±1.5V
= 0V
R
R
= 10k
= 50k
CM
CM
L
L
V
V
= ±1.5V
= ±1V
S
IN
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
= 0.2V TO 2.2V
F
G
V
S
V
S
= 3V. 0V
= 3V, 0V
= 1.5V
= 1.5V
CM
CM
0.001
0.001
100
1k
10k
100k
–6 –5 –4 –3 –2 –1
0
1
2
3
4
5
6
0
1
2
3
LOAD RESISTANCE TO GROUND (Ω)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE AMPLITUDE (V
)
P-P
1782 G22
1782 G23
1782 G24
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
VS = ±5V
AV = 1
CL = 15pF
1782 G26
VS = ±5V
AV = 1
CL = 15pF
1782 G27
0
0.5
1
1.5
2
2.5
SHUTDOWN PIN VOLTAGE (V)
1782 G25
10
LT1782
W U U
APPLICATIO S I FOR ATIO
U
Supply Voltage
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.
TheinputstageoftheLT1782incorporatesphasereversal
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.
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.
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.
Inputs
The LT1782 has two input stages, NPN and PNP (see the
Simplified Schematic), resulting in three distinct operat-
ingregionsasshownintheInputBiasCurrentvsCommon
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
0.5Vofthepositiverail, theNPNstageisoperatingandthe
input bias current is typically 15nA. Increases in tempera-
ture 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.
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 150Ω resistor
between the output and ground will compensate these
amplifiersforlargercapacitiveloads, upto10,000pF, atall
output currents.
Distortion
A Schottky diode in the collector of the input NPN transis-
tors, along with special geometries for these NPN transis-
tors, allowstheLT1782tooperatewitheitherorbothofits
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 volt-
age is typically 1.8mV when operating above V+. The
LT1782 will operate with its inputs 18V above V– regard-
less of V+.
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.IftheopampisoperatinginthePNPinputstage
(input is not within 0.8V of V+), the CMRR is very good,
11
LT1782
W U 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 Character-
isticscurves, “TotalHarmonicDistortion+NoisevsOuput
Voltage Amplitude.”
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
thepart,reducingquiescentcurrentandmakingtheoutput
highimpedance.Thepartcanbeshutdownbybringingthe
SHDN pin 1.2V or more above V–. When shut down, the
supplycurrentisabout5µAandtheoutputleakagecurrent
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.”
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes perfor-
W
W
SI PLIFIED SCHE ATIC
+
V
Q2
Q1
Q3
Q22
D1
Q8
D3
SHDN
J1
R1
30k
R2
6k
Q19
Q4
–IN
+IN
Q17
Q18
Q20
+
OUT
Q7
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
12
LT1782
U
TYPICAL APPLICATIO S
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 TA03
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
LT1782
5%
–
100k
5%
0.1µF
V
OUT
LT1790-2.5
2.5V
1782 TA04
1µF
I
= 0mA TO 300mA
LOAD
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)
SOT-23
(Original)
SOT-23
(ThinSOT)
.90 – 1.45
1.00 MAX
A
A1
A2
L
(.035 – .057)
(.039 MAX)
.00 – .15
(.00 – .006)
.01 – .10
(.0004 – .004)
2.60 – 3.00
1.50 – 1.75
(.102 – .118) (.059 – .069)
(NOTE 3)
.90 – 1.30
(.035 – .051)
.80 – .90
(.031 – .035)
.35 – .55
(.014 – .021)
.30 – .50 REF
(.012 – .019 REF)
PIN ONE
.95
(.037)
REF
.25 – .50
(.010 – .020)
(5PLCS, NOTE 2)
.20
(.008)
A2
A
DATUM ‘A’
1.90
(.074)
REF
L
.09 – .20
(.004 – .008)
(NOTE 2)
A1
S5 SOT-23 0401
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
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
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)
.90 – 1.45
1.00 MAX
A
A1
A2
L
(.035 – .057)
(.039 MAX)
.00 – 0.15
(.00 – .006)
.01 – .10
(.0004 – .004)
2.60 – 3.00
1.50 – 1.75
(.102 – .118) (.059 – .069)
(NOTE 3)
.90 – 1.30
(.035 – .051)
.80 – .90
(.031 – .035)
PIN ONE ID
.35 – .55
(.014 – .021)
.30 – .50 REF
(.012 – .019 REF)
.95
(.037)
REF
.25 – .50
(.010 – .020)
(6PLCS, NOTE 2)
.20
(.008)
A2
A
DATUM ‘A’
1.90
(.074)
REF
L
.09 – .20
(.004 – .008)
(NOTE 2)
A1
S6 SOT-23 0401
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
15
LT1782
TYPICAL APPLICATIO S
U
Current Source
V
CC
LT1634-1.25
R1
+
2N3906
LT1782
–
1.25V
R1
I
=
OUT
1782 TA02
Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier
Programmable Gain Amplifier Frequency Response
30
25
V
CC
A
A
= 20
A
= 20
A = 2
V
V
V
V
20
15
SHDN
V
CC
10
IN
+
5
= 2
OUT
LT1784
0
SHDN
V
CC
–
–5
–10
–15
–20
+
V
EE
LT1782
–
R1 + R2
R3
1k
10k
100k
FREQUENCY (Hz)
1M
10M
A
V
= 1+
(
(
)
)
V
EE
1782 TA05b
R1
R1
10k
R2
OR 1+
9.09k
R2 + R3
R3
1k
1782 TA05a
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
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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
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CM EE
V
, MSOP Package, Shutdown Function
CC
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
1782fa LT/TP 0501 1.5K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1999
16 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
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