LT1637CS8#TR [Linear]
LT1637 - 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;
| 型号： | LT1637CS8#TR |
| 厂家： | 
Linear |
| 描述： | LT1637 - 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C 放大器 光电二极管 |
| 文件： | 总16页 (文件大小：348K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1637
1.1MHz, 0.4V/µs
Over-The-Top Micropower, Rail-To-Rail
Input and Output Op Amp
U
DESCRIPTIO
FEATURES
Operates with Inputs Above V+
The LT®1637 is a rugged op amp that operates on all single
and split supplies with a total voltage of 2.7V to 44V. The
■
■
Rail-to-Rail Input and Output
■
Micropower: 250µA Supply Current Max
Operating Temperature Range: – 55°C to 125°C
Gain-Bandwidth Product: 1.1MHz
Slew Rate: 0.4V/µs
LT1637 has a gain-bandwidth product of 1.1MHz while
drawing less than 250µA of quiescent current. The LT1637
can be shut down, making the output high impedance and
reducing the quiescent current to only 3µA. The LT1637 is
reversesupplyprotected:itdrawsvirtuallynocurrentforre-
verse supply up to 25V. The input range of the LT1637 in-
cludesbothsuppliesandtheoutputswingstobothsupplies.
Unlike most micropower op amps, the LT1637 can drive
heavyloads;itsrail-to-railoutputdrives25mA.TheLT1637
is unity-gain stable into all capacitive loads up to 4700pF
when optional 0.22µF and 150Ω compensation is used.
■
■
■
■
■
■
■
■
■
■
■
■
■
Low Input Offset Voltage: 350µV Max
Single Supply Input Range: –0.4V to 44V
High Output Current: 25mA Min
Specified on 3V, 5V and ±15V Supplies
Output Shutdown
Output Drives 4700pF with Output Compensation
Reverse Battery Protection to 25V
High Voltage Gain: 800V/mV
High CMRR: 110dB
Available in 8-Lead MSOP, PDIP and SO Packages;
The LT1637 has a unique input stage that operates and
remains high impedance when above the positive supply.
The inputs take 44V both differential and common mode,
even when operating on a 3V supply. Built-in resistors
protect the inputs for faults below the negative supply up
to 22V. There is no phase reversal of the output for inputs
5V below VEE or 44V above VEE, independent of VCC.
and a Tiny (3mmU× 3mm × 0.8mm) DFN Package
APPLICATIO S
■
Battery or Solar Powered Systems:
Portable Instrumentation
Sensor Conditioning
The LT1637 op amp is available in the 8-pin MSOP, PDIP
and SO packages. For space limited applications, the
LT1637 is available in a 3mm × 3mm × 0.8mm dual fine
pitch leadless package (DFN).
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Over-The-Top is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■
Supply Current Sensing
■
Battery Monitoring
MUX Amplifiers
4mA to 25mA Transmitters
■
■
U
TYPICAL APPLICATIO
Over-The-Top® Current Source with Shutdown
Current Source Timing
Switchable Precision Current Source
6V
4V TO 44V
4V
2V
0V
+
VSHDN
4.7µF
R*
LT1004-1.2
2k
R
+
–
LT1637
TP0610
I
10mA
5mA
1.2
R
=
IOUT
OUT
I
e.g., 10mA = 120Ω
OUT
0mA
SHDN
*OPTIONAL FOR LOW OUTPUT CURRENTS,
R* = R
1637 TA01
1637 TA01b
100µs/DIV
1637fd
1
LT1637
W W U W
ABSOLUTE AXI U RATI GS (Note 1)
Total Supply Voltage (V+ to V–) .............................. 44V
Input Differential Voltage ......................................... 44V
Input Current ...................................................... ±25mA
Shutdown Pin Voltage Above V– ..................................... 32V
Shutdown Pin Current ........................................ ±10mA
Output Short-Circuit Duration (Note 2).........Continuous
Operating Temperature Range (Note 3)
Specified Temperature Range (Note 4)
LT1637C/LT1637I .............................. –40°C to 85°C
LT1637H .......................................... –40°C to 125°C
LT1637MP......................................... –55°C to 125°C
Junction Temperature........................................... 150°C
Junction Temperature (DD Package) ................... 125°C
Storage Temperature Range ................. –65°C to 150°C
Storage Temperature Range
LT1637C/LT1637I .............................. –40°C to 85°C
LT1637H .......................................... –40°C to 125°C
LT1637MP......................................... –55°C to 125°C
(DD Package) ....................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
TOP VIEW
NULL
–IN
1
2
3
4
8
7
6
5
NULL
NULL
–IN A
+IN A
1
2
3
4
8
7
6
5
NULL
NULL
–IN
1
2
3
4
8 NULL
7 V
6 OUT
5 SHDN
+
+
V
V
+
OUT
+IN
+IN
OUT
–
–
V
V
SHDN
–
V
SHDN
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 250°C/W
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 150°C/W (N8)
TJMAX = 125°C, θJA = 160°C/W (NOTE 2)
T
JMAX = 150°C, θJA = 190°C/W (S8)
UNDERSIDE METAL CONNECTED TO V–
ORDER PART
NUMBER
ORDER PART
NUMBER
MS8 PART*
MARKING
ORDER PART
NUMBER
S8 PART
MARKING
DD PART*
MARKING
LT1637CDD
LT1637IDD
LAAK
LAAK
LT1637CMS8
LT1637IMS8
LTIE
LTIE
LT1637CN8
LT1637CS8
LT1637IN8
LT1637IS8
LT1637HS8
LT1637MPS8
1637
1637I
1637H
1637MP
*The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges.
U
3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise
specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V; VSHDN = V–,VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1637C/LT1637I
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
MIN
TYP
MAX
UNITS
V
N8, S8 Packages
100
350
550
700
µV
µV
µV
OS
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
MS8 Package
100
125
350
750
µV
µV
µV
µV
µV
µV
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
1100
A
DD Package
550
950
1100
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
1637fd
2
LT1637
U
3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise
specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V; VSHDN = V–,VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1637C/LT1637I
SYMBOL PARAMETER
Input Offset Voltage Drift (Note 9)
CONDITIONS
N8, S8 Packages, –40°C ≤ T ≤ 85°C
MIN
TYP
MAX
UNITS
●
●
●
1
2
2
3
6
6
µV/°C
µV/°C
µV/°C
A
MS8 Package, –40°C ≤ T ≤ 85°C
A
DDPackage, –40°C ≤ T ≤ 85°C
A
I
I
Input Offset Current
Input Bias Current
●
●
0.4
6.0
2.5
nA
µA
OS
B
V
= 44V (Note 5)
CM
●
●
20
23
0.1
50
60
nA
µA
nA
V
= 44V (Note 5)
CM
V = 0V
S
Input Noise Voltage
0.1Hz to 10Hz
f = 1kHz
0.6
27
µV
P-P
e
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
nV/√Hz
pA/√Hz
n
i
f = 1kHz
0.08
n
R
IN
Differential
Common Mode, V = 0V to 44V
1
0.7
2.6
1.4
MΩ
MΩ
CM
C
Input Capacitance
4
pF
V
IN
Input Voltage Range
●
0
44
CMRR
Common Mode Rejection Ratio
(Note 5)
V
V
= 0V to (V – 1V)
= 0V to 44V (Note 8)
●
●
88
80
110
98
dB
dB
CM
CM
CC
A
Large-Signal Voltage Gain
V = 3V, V = 500mV to 2.5V, R = 10k
150
100
75
400
V/mV
V/mV
V/mV
VOL
S
O
L
V = 3V, 0°C ≤ T ≤ 70°C
●
●
S
A
V = 3V, –40°C ≤ T ≤ 85°C
S
A
V = 5V, V = 500mV to 4.5V, R = 10k
300
200
150
800
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
325
580
8
mV
mV
mV
OL
OH
I
= 5mA
700
1300
SINK
V = 5V, I
S
= 10mA
SINK
V = 3V, No Load
●
●
2.94
2.25
2.975
2.67
V
V
S
V = 3V, I
S
= 5mA
SOURCE
V = 5V, No Load
●
●
4.94
3.80
4.975
4.45
V
V
S
V = 5V, I
= 10mA
S
SOURCE
I
Short-Circuit Current (Note 2)
V = 3V, Short Output to Ground
10
15
14
45
mA
mA
SC
S
V = 3V, Short Output to V
S
CC
V = 5V, Short Output to Ground
15
15
22
60
mA
mA
S
V = 5V, Short Output to V
S
CC
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
V = 3V to 12.5V, V = V = 1V
●
●
●
90
98
dB
V
S
CM
O
2.7
I = –100µA
S
25
40
V
I
I
Supply Current
(Note 6)
190
250
295
µA
µA
S
●
●
Supply Current, SHDN
Shutdown Pin Current
V
= 2V, No Load (Note 6)
3
12
µA
PIN5
V
V
V
V
= 0.3V, No Load (Note 6)
= 2V, No Load (Note 5)
= 3.3V
●
●
0.2
1.0
2.5
4.3
15
5
nA
µA
µA
µA
SHDN
PIN5
PIN5
PIN5
PIN5
= 5V
Output Leakage Current, SHDN
V
= 2V, No Load (Note 6)
●
0.02
1
µA
PIN5
1637fd
3
LT1637
U
3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise
specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V; VSHDN = V–, VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1637C/LT1637I
SYMBOL PARAMETER
Maximum Shutdown Pin Current
Turn-On Time
CONDITIONS
MIN
TYP
MAX
UNITS
µA
V
V
V
= 32V, No Load (Note 5)
●
20
150
PIN5
PIN5
PIN5
t
t
t
= 5V to 0V, R = 10k
45
µs
ON
L
Turn-Off Time
Settling Time
= 0V to 5V, R = 10k
3
µs
OFF
L
0.1% A = 1, ∆V = 2V
9
µs
SETTLING
V
O
GBW
Gain-Bandwidth Product
(Note 5)
f = 10kHz
650
550
500
1000
kHz
kHz
kHz
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
SR
Slew Rate
(Note 7)
A = –1, R = ∞
0.210
0.185
0.170
0.35
V/µs
V/µs
V/µs
V
L
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
±15V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise
specifications are at TA = 25°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V– unless otherwise specified. (Note 4)
LT1637C/LT1637I
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
N8, S8 Packages
100
450
650
800
µV
µV
µV
OS
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
MS8 Package
100
125
450
800
1150
µV
µV
µV
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
DD Package
650
1000
1150
µV
µV
µV
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
Input Offset Voltage Drift (Note 9)
N8, S8 Packages, –40°C ≤ T ≤ 85°C
●
●
●
1
2
2
3
6
6
µV/°C
µV/°C
µV/°C
A
MS8 Package, –40°C ≤ T ≤ 85°C
A
DD Package, –40°C ≤ T ≤ 85°C
A
I
I
Input Offset Current
Input Bias Current
●
●
1
17
6
nA
nA
OS
50
B
Input Noise Voltage
0.1Hz to 10Hz
f = 1kHz
0.6
27
µV
P-P
e
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
nV/√Hz
pA/√Hz
n
i
f = 1kHz
0.08
n
R
IN
Differential
Common Mode, V = –15V to 14V
1
3
2200
MΩ
MΩ
CM
C
Input Capacitance
4
pF
V
IN
Input Voltage Range
●
●
–15
80
29
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
= –15V to 29V
110
400
dB
CM
A
V = ±14V, R = 10k
100
75
50
V/mV
V/mV
V/mV
VOL
O
L
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
V
Output Voltage Swing LOW
No Load
●
●
●
–14.997 –14.95
–14.680 –14.25
–14.420 –13.65
V
V
V
OL
I
I
= 5mA
= 10mA
SINK
SINK
1637fd
4
LT1637
±15V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise
specifications are at TA = 25°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V– unless otherwise specified. (Note 4)
LT1637C/LT1637I
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Output Voltage Swing HIGH
No Load
●
●
●
14.9
14.2
13.7
14.967
14.667
14.440
V
V
V
OH
I
I
= 5mA
= 10mA
SOURCE
SOURCE
I
Short-Circuit Current (Note 2)
Short Output to GND
0°C ≤ T ≤ 70°C
± 25
± 20
± 15
±31.7
mA
mA
mA
SC
●
●
A
–40°C ≤ T ≤ 85°C
A
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Supply Current
V = ± 1.5V to ±22V
●
●
90
115
dB
V
S
±1.35
I
I
230
6
300
370
µA
µA
S
●
●
Positive Supply Current, SHDN
Shutdown Pin Current
V
= –20V, V = ±22V, No Load
40
µA
PIN5
S
V
V
= –21.7V, V = ±22V, No Load
●
●
0.3
0.9
15
8
nA
µA
SHDN
PIN5
PIN5
S
= –20V, V = ±22V, No Load
S
Maximum Shutdown Pin Current
Output Leakage Current, SHDN
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Turn-On Time
V
V
= 32V, V = ±22V
●
●
●
●
20
0.02
–21.6
–20.8
35
150
2
µA
µA
V
PIN5
PIN5
S
= –20V, V = ±22V, No Load
S
V
V
V = ± 22V
–21.7
L
S
V = ± 22V
–20.0
V
H
S
t
t
V
V
= –10V to –15V, R = 10k
µs
µs
ON
OFF
PIN5
PIN5
L
Turn-Off Time
= –15V to –10V, R = 10k
3
L
GBW
Gain-Bandwidth Product
f = 10kHz
0°C ≤ T ≤ 70°C
750
650
600
1100
kHz
kHz
kHz
●
●
A
–40°C ≤ T ≤ 85°C
A
SR
Slew Rate
A = –1, R = ∞, V = ±10V, Measure at V = ±5V
0.225
0.200
0.180
0.4
V/µs
V/µs
V/µs
V
L
O
O
0°C ≤ T ≤ 70°C
●
●
A
–40°C ≤ T ≤ 85°C
A
1637fd
5
LT1637
U
3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C for LT1637H and
–55°C ≤ TA ≤ 125°C for LT1637MP. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1637H/LT1637MP
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
100
450
3
µV
OS
●
●
mV
Input Offset Voltage Drift (Note 9)
Input Offset Current
3
10
µV/°C
I
I
●
●
15
10
nA
µA
OS
V
V
= 44V (Note 5)
= 44V (Note 5)
CM
CM
Input Bias Current
●
●
150
100
nA
µA
B
Input Voltage Range
●
0.3
44
V
CMRR
Common Mode Rejection Ratio
(Note 5)
V
V
= 0.3V to (V – 1V)
= 0.3V to 44V
●
●
72
74
dB
dB
CM
CM
CC
A
Large-Signal Voltage Gain
V = 3V, V = 500mV to 2.5V, R = 10k
150
20
400
800
V/mV
V/mV
VOL
S
O
L
●
V = 5V, V = 500mV to 4.5V, R = 10k
300
35
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
●
●
2.90
2.05
V
V
S
V = 3V, I
S
= 5mA
SOURCE
V = 5V, No Load
●
●
4.90
3.50
V
V
S
V = 5V, I
= 10mA
S
SOURCE
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Reverse Supply Voltage
Supply Current
V = 3V to 12.5V, V = V = 1V
●
●
●
80
2.7
23
dB
V
S
CM
O
I = –100µA
S
V
I
I
(Note 6)
190
250
400
µA
µA
S
●
●
Supply Current, SHDN
Shutdown Pin Current
V
= 2V, No Load (Note 6)
15
µA
PIN5
V
V
= 0.3V, No Load (Note 6)
= 2V, No Load (Note 5)
●
●
200
7
nA
µA
SHDN
PIN5
PIN5
Output Leakage Current, SHDN
Maximum Shutdown Pin Current
Gain-Bandwidth Product
V
V
= 2V, No Load (Note 6)
= 32V, No Load (Note 5)
●
●
5
µA
µA
PIN5
PIN5
200
GBW
SR
f = 10kHz (Note 5)
650
350
1000
0.35
kHz
kHz
●
●
Slew Rate
A = –1, R = ∞ (Note 7)
0.210
0.1
V/µs
V/µs
V
L
1637fd
6
LT1637
±15V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C for LT1637H and
–55°C ≤ TA ≤ 125°C for LT1637MP. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V–, unless otherwise specified. (Note 4)
LT1637H/LT1637MP
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
100
550
3.4
µV
OS
●
●
●
●
●
mV
Input Offset Voltage Drift (Note 9)
Input Offset Current
3
11
25
µV/°C
nA
I
I
OS
Input Bias Current
250
nA
B
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
= –14.7V to 29V
72
dB
CM
A
V = ±14V, R = 10k
100
4
400
V/mV
V/mV
VOL
O
L
●
V
Output Voltage Swing
No Load
●
●
●
±14.8
±14.0
±13.4
V
V
V
O
I
= ±5mA
OUT
= ±10mA
OUT
I
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
Supply Current
V = ±1.5V to 22V
●
●
84
dB
V
S
±1.35
I
I
230
300
500
µA
µA
S
●
●
Positive Supply Current, SHDN
Shutdown Pin Current
V
= –20V, V = ±22V, No Load
60
µA
PIN5
S
V
V
= –21.7V, V = ±22V, No Load
●
●
200
10
nA
µA
SHDN
PIN5
PIN5
S
= –20V, V = ±22V, No Load
S
Maximum Shutdown Pin Current
Output Leakage Current, SHDN
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Gain-Bandwidth Product
V
V
= 32V, V = ±22V
●
●
●
●
200
100
µA
µA
V
PIN5
PIN5
S
= –20V, V = ±22V, No Load
S
V
V
V = ±22V
–21.7
L
S
V = ±22V
–20
V
H
S
GBW
f = 10kHz
750
400
1100
0.4
kHz
kHz
●
●
SR
Slew Rate
A = –1, R = ∞, V = ±10V,
Measure at V = ±5V
0.225
0.1
V/µs
V/µs
V
L
O
O
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.
specified performance from –40°C to 85°C but is not tested or QA
sampled at these temperatures. The LT1637I is guaranteed to meet
specified performance from –40°C to 85°C. The LT1637H is guaranteed to
meet specified performance from –40°C to 125°C and the LT1637MP is
guaranteed to meet specified performance from –55°C to 125°C.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum. The θ specified for the DD package is with
minimal PCB heat spreading metal. Using expanded metal area on all layers
of a board reduces this value.
Note 5: V = 5V limits are guaranteed by correlation to V = 3V and
JA
S
S
V = ±15V or V = ±22V tests.
S
S
Note 6: V = 3V limits are guaranteed by correlation to V = 5V and
S
S
Note 3: The LT1637C and LT1637I are guaranteed functional over the
operating temperature range of –40°C to 85°C. The LT1637H is guaranteed
functional over the operating temperature range of –40°C to 125°C. The
LT1637MP is guaranteed functional over the operating temperature range
–55°C to 125°C.
Note 4: The LT1637C is guaranteed to meet specified performance from
0°C to 70°C. The LT1637C is designed, characterized and expected to meet
V = ±15V or V = ±22V tests.
S
S
Note 7: Guaranteed by correlation to slew rate at V = ±15V and GBW at
S
V = 3V and V = ±15V tests.
S
S
Note 8: This specification implies a typical input offset voltage of 650µV at
= 44V and a maximum input offset voltage of 5.4mV at V = 44V.
V
CM
CM
Note 9: This parameter is not 100% tested.
1637fd
7
LT1637
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
Supply Current vs Supply Voltage
Minimum Supply Voltage
40
30
400
350
300
250
200
150
100
50
400
300
V
= 5V, 0V
S
20
200
10
T
= 125°C
100
A
T
A
= –55°C
0.12
0.08
0.04
0
0
T
= 125°C
A
T
T
= 25°C
A
A
–100
–200
–300
–400
T
= 125°C
= –55°C
A
T
T
= –55°C
= 25°C
3
A
A
T
= 25°C
A
0.04
0.08
0
0
10
20
30
40
0
1
2
4
5
4
4.2 4.4 4.6 4.8
5
10 20 30 40 50
TOTAL SUPPLY VOLTAGE (V)
TOTAL SUPPLY VOLTAGE (V)
COMMON MODE VOLTAGE (V)
1637 G01
1637 G02
1637 G03
Output Saturation Voltage
vs Load Current (Output Low)
Output Saturation Voltage
vs Input Overdrive
Output Saturation Voltage
vs Load Current (Output High)
1
10
1
100
V
V
= 5V, 0V
= 30mV
V
V
= 5V, 0V
= 30mV
S
OD
V = 5V, 0V
S
NO LOAD
S
OD
90
80
70
60
50
40
30
20
10
0
0.1
0.1
T
A
= 125°C
T
A
= 125°C
T
A
= 25°C
T
= 25°C
A
0.01
OUTPUT HIGH
T
= –55°C
A
T
= –55°C
A
OUTPUT LOW
0.01
0.001
0.0001 0.001 0.01
0.1
1
10
100
0.0001 0.001 0.01
0.1
1
10
100
0
10 20 30 40 50 60 70 80 90 100
INPUT OVERDRIVE (mV)
1637 G06
SOURCING LOAD CURRENT (mA)
SINKING LOAD CURRENT (mA)
1637 G04
1637 G05
Noise Voltage Density
vs Frequency
0.1Hz to 10Hz Noise Voltage
Input Noise Current vs Frequency
70
60
50
40
30
20
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
= ±15V
V
S
= ± 2.5V
V
= ±15V
S
S
1
10
100
1000
0
1
2
3
4
5
6
7
8
9
10
1
10
100
1000
FREQUENCY (Hz)
TIME (s)
FREQUENCY (Hz)
1637 G09
1637 G08
1637 G07
1637fd
8
LT1637
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Open-Loop Gain and Phase Shift
vs Frequency
Gain-Bandwidth Product
vs Temperature
Slew Rate vs Temperature
70
60
50
40
120
100
80
1300
1200
1100
1000
900
0.7
0.6
0.5
0.4
0.3
0.2
0.1
V
= ±2.5V
S
RISING, V = ±15V
S
PHASE
60
V
= ±15V
S
RISING, V = ±1.5V
S
30
20
40
20
GAIN
FALLING, V = ±15V
S
V
= ±1.5V
S
10
0
0
FALLING, V = ±1.5V
S
–10
–20
–30
800
700
1k
10k
100k
1M
–50
25
50
75
100 125
–50 –25
0
25
50
75 100 125
–25
0
FREQUENCY (Hz)
TEMPERATURE (°C)
TEMPERATURE (°C)
1637 G10
1637 G11
1637 G12
Gain-Bandwidth Product and
Phase Margin vs Supply Voltage
CMRR vs Frequency
PSRR vs Frequency
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
1300
1250
1200
1150
1100
1050
1000
55
50
45
40
35
30
25
V
S
= ± 2.5V
V
= ±15V
PHASE MARGIN
S
POSITIVE SUPPLY
V
S
= ±1.5V
GAIN BANDWIDTH
NEGATIVE SUPPLY
–10
1k
10k
100k
FREQUENCY (Hz)
1M
1k
10k
100k
FREQUENCY (Hz)
1M
0
5
10 15 20 25 30 35 40 45
TOTAL SUPPLY VOLTAGE (V)
1637 G14
1637 G15
1637 G13
Gain-Bandwidth Product and
Phase Margin vs Load Resistance
Undistorted Output Swing
vs Frequency
Output Impedance vs Frequency
10k
1k
35
30
25
20
15
10
5
1400
1300
1200
1100
1000
900
50
45
40
35
30
25
20
15
10
DISTORTION ≤ 1%
= 1
V
S
= ± 2.5V
V = ± 2.5V
S
V = ±15V
s
A
V
PHASE MARGIN
A
= 100
= 10
= 1
V
V
V
100
10
GAIN BANDWIDTH
A
A
800
1
V = ± 2.5V
s
700
0.1
100
0
100
600
1k
10k
LOAD RESISTANCE (Ω)
100k
1k
10k
100k
1M
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
1637 G17
1637 G18
1637 G16
1637fd
9
LT1637
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Capacitive Load Handling,
Overshoot vs Capacitive Load
Settling Time to 0.1%
vs Output Step
Total Harmonic Distortion + Noise
vs Frequency
10
8
100
90
10
1
V
S
= ±15V
V
= ±2.5V
V
V
V
= 3V, 0V
S
S
NO OUTPUT COMPENSATION
= 1.8V
OUT
= 1.2V
P-P
6
80
CM
A
V
= –1
A
= 1
A
= 2
V
V
R
=10k
L
4
70
A
= 1
A
V
= 5
V
2
60
50
0.1
0
A
= 10
V
–2
–4
–6
–8
–10
40
30
20
10
0
0.01
0.001
0.0001
A
= –1
= 1
V
A
= 1
A = –1
V
V
A
V
0
20
SETTLING TIME (µs)
30
10
40
10
100
1000
10000
10
100
1k
FREQUENCY (Hz)
10k
100k
CAPACITIVE LOAD (pF)
1637 G20
1637 G21
1637 G19
Total Harmonic Distortion + Noise
vs Load Resistance
Total Harmonic Distortion + Noise
vs Output Voltage
10
1
R
V
= 10k
CM
f = 1kHz
V
A
V
= 3V TOTAL
= 1
L
S
V
= HALF SUPPLY
A
V
= 1
= 3V, 0V
V
S
= 1.8V AT 1kHz
V
V
= ±1.5V
= ±0.9V
IN
P-P
S
IN
FOR A = –1, R = 100k
V
G
0.1
1
0.1
A
V
= –1
= ±1.5V
V
S
A
V
V
S
= 1
= ±1.5V
V
V
= 3V, 0V
S
= 0.6V TO 2.4V
IN
0.01
A
V
= 1
= 3V, 0V
V
S
0.001
0.01
0.001
V
V
= 3V, 0V
IN
S
= 0.3V TO 2.1V
A
= –1, V = 3V, 0V
S
V
0.0001
0
1
2
3
100
1k
10k
100k
LOAD RESISTANCE TO GROUND (Ω)
OUTPUT VOLTAGE (V
)
P-P
1637 G23
1637 G22
Open-Loop Gain
Large-Signal Response
Small-Signal Response
VS = ± 15V
AV = –1
VS = ±15V
AV = 1
VS = ±15V
10V
A
A
B
50mV
B
C
C
–50mV
A: RL = 2k
B: RL = 10k
C: RL = 50k
–10V
–10V
0V
10V
1637 G24
1637 G25
1637 G26
OUTPUT VOLTAGE (5V/DIV)
1637fd
10
LT1637
U
W U U
APPLICATIO S I FOR ATIO
Supply Voltage
The inputs are protected against excursions as much as
22V below V– by an internal 1.3k resistor in series with
each input and a diode from the input to the negative
supply. There is no output phase reversal for inputs up to
5V below V–. There are no clamping diodes between the
inputs and the maximum differential input voltage is 44V.
The positive supply pin of the LT1637 should be bypassed
with a small capacitor (about 0.01µF) within an inch of the
pin. When driving heavy loads an additional 4.7µF electro-
lytic capacitor should be used. When using split supplies,
the same is true for the negative supply pin.
The LT1637 is protected against reverse battery voltages
up to 25V. In the event a reverse battery condition occurs,
the supply current is typically less than 1nA.
Output
The output voltage swing of the LT1637 is affected by
input overdrive as shown in the typical performance
curves. When monitoring input voltages within 100mV of
V+, gain should be taken to keep the output from clipping.
When operating the LT1637 on total supplies of 30V or
more, the supply must not be brought up faster than 1µs.
This is especially true if low ESR bypass capacitors are
used. A series RLC circuit is formed from the supply lead
inductance and the bypass capacitor. 5Ω of resistance in
the supply or the bypass capacitor will dampen the tuned
circuit enough to limit the rise time.
The output of the LT1637 can be pulled up to 25V beyond
V+ with less than 1nA of leakage current, provided that V+
is less than 0.5V.
The normally reverse biased substrate diode from the
outputtoV– willcauseunlimitedcurrentstoflowwhenthe
output is forced below V–. If the current is transient and
limited to 100mA, no damage will occur.
Inputs
The LT1637 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 0.9V or more below V+, the PNP
input stage is active and the input bias current is typically
–20nA. When the input voltage is about 0.5V or less from
V+, the NPN input stage is operating and the input bias
current is typically 80nA. Increases in temperature will
cause the voltage at which operation switches from the
PNPstagetotheNPNstagetomovetowardsV+. Theinput
offset voltage of the NPN stage is untrimmed and is
typically 600µV.
The LT1637 is internally compensated to drive at least
200pF 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
amplifiers for larger capacitive loads, up to 4700pF, at all
output currents.
Distortion
There are two main contributors of distortion in op amps:
output crossover distortion as the output transitions from
sourcing to sinking current and distortion caused by
nonlinear common mode rejection. Of course, if the op
amp is operating inverting there is no common mode
induced distortion. When the LT1637 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 LT1637 should be
operated single supply, with the output always sourcing
current and with the input voltage swing between ground
and (V+ – 0.9V). See the Typical Performance Character-
istics curves.
A Schottky diode in the collector of each NPN transistor of
the NPN input stage allows the LT1637 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 23µA at room temperature. The
input offset voltage is typically 600µV when operating
aboveV+.TheLT1637willoperatewithitsinput44Vabove
V– regardless of V+.
1637fd
11
LT1637
U
W U U
APPLICATIO S I FOR ATIO
Gain
The shutdown pin can be taken up to 32V above V–. The
shutdown pin can be driven below V–, however the pin
currentthroughthesubstratediodeshouldbelimitedwith
an external resistor to less than 10mA.
The open-loop gain is less sensitive to load resistance
when the output is sourcing current. This optimizes per-
formance in single supply applications where the load is
returned to ground. The typical performance photo of
Open-Loop Gain for various loads shows the details.
Input Offset Nulling
The input offset voltage can be nulled by placing a 10k
potentiometer between Pins 1 and 8 with its wiper to V–
(see Figure 1). The null range will be at least ±3mV.
Shutdown
The LT1637 can be shut down two ways: using the
shutdownpinorbringingV+ towithin0.5VofV–.WhenV+
is brought to within 0.5V of V– both the supply current and
output leakage current drop to less than 10nA. When the
shutdown pin is brought 1.2V above V–, the supply
current drops to about 3µA and the output leakage current
islessthan1µA,independentofV+.Ineithercasetheinput
bias current is less than 0.1nA (even if the inputs are 44V
above the negative supply).
LT1637
8
1
10k
–
V
1637 F01
Figure 1. Input Offset Nulling
W
W
SI PLIFIED SCHE ATIC
+
7
V
Q1
Q13
Q19
Q25
D1
D2
Q23
R3
1.3k
R2
6k
D3
–IN
+IN
2
3
Q21
Q24
SHDN
5
Q2
10µA
R4
1.3k
6
OUT
Q9
Q10
Q14 Q15
Q18
Q20
Q22
R1
1M
Q11
Q12
Q16
Q17
Q26
Q3
Q4
R5
7k
R6
7k
Q6
Q8
D4
D5
Q5
Q7
NULL
1
8
NULL
R7
400Ω
R8
400Ω
–
4
V
1637 SS
1637fd
12
LT1637
U
TYPICAL APPLICATIO S
Optional Output Compensation for
Capacitive Loads Greater Than 200pF
Positive Supply Rail Current Sense
5V
V
+
IN
200Ω
LT1637
C
≤ 4700pF
L
–
0.2Ω
+
Q1
2N3904
LT1637
0.22µF
150Ω
200Ω
–
0V TO 4.3V
2k
I
LOAD
LOAD
1637 TA03
1637 TA02
V
= (2Ω)(I
)
LOAD
OUT
Lamp Outage Detector
3V
5V TO 44V
1M
LAMP
ON/OFF
100k
5k
–
0.5Ω
OUT
LT1637
+
OUT = 0V FOR GOOD BULB
3V FOR OPEN BULB
1637 TA05
Over-The-Top Comparator with Hysteresis
Over-The-Top Current Sense
3V TO 44V
1M
R1
200Ω
3V TO 44V
10k
3V
IN1
+
(0V TO 44V)
R
S
+
–
V
0.2Ω
LT1637
1M
OUT
Q1
2N3904
LT1637
–
1M
V
OUT
(0V TO 2.7V)
1M
2N5087
2N5210
I
LOAD
R2
2k
10k
IN2
(0V TO 44V)
V
OUT
LOAD
I
=
LOAD
(R )(R2/R1)
S
1637 TA06
V
CC
100
HYSTERESIS =
1637 TA04
1637fd
13
LT1637
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
0.38 ± 0.10
TYP
5
8
0.675 ±0.05
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
3.5 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ±0.05
PIN 1
TOP MARK
(NOTE 6)
PACKAGE
OUTLINE
(DD) DFN 1203
4
1
0.25 ± 0.05
0.75 ±0.05
0.200 REF
0.25 ± 0.05
0.50 BSC
0.50
BSC
2.38 ±0.05
(2 SIDES)
2.38 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.52
(.0205)
REF
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ± .0015)
8
7 6
5
TYP
RECOMMENDED SOLDER PAD LAYOUT
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 ± 0.152
(.021 ± .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.127 ± 0.076
(.005 ± .003)
0.65
(.0256)
BSC
MSOP (MS8) 0204
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
1637fd
14
LT1637
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
4
.255 ± .015*
(6.477 ± 0.381)
1
2
3
.130 ± .005
.300 – .325
.045 – .065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
.325
–.015
.018 ± .003
(0.457 ± 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 ±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
1637fd
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
LT1637
U
TYPICAL APPLICATIO S
Sample-and-Hold
3V
3V
+
V
IN
LT1637
+
–
LT1636
V
OUT
–
150Ω
0.22µF
SHDN
3V
V
1637 TA07
SAMPLE
0V
DROOP (LT1636 BUFFER): 200mV/s
DROOP INTO HIGH IMPEDANCE : LESS THAN 0.625mV/s
MUX Amplifier
MUX Amplifier Waveforms
5V
V
IN1
P-P
+
5kHz AT 4V
LT1637
V
OUT
–
VOUT
2V/DIV
SHDN
5V
–
+
INPUT
SELECT
LT1637
5V/DIV
V
IN2
10kHz AT 2V
P–P
0.2ms/DIV
1637 TA08
SHDN
INPUT SELECT
1kHz AT 5V
P–P
1637 TA09
74HC04
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
Input/Output Common Mode Includes Ground, 70µV V
and 2.5µV/°C Drift (Max), 200kHz GBW, 0.07V/µs Slew Rate
LT1078/LT1079
LT2078/LT2079
Dual/Quad 55µA Max, Single Supply, Precision Op Amps
Dual/Quad 17µA Max, Single Supply, Precision Op Amps
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
OS(MAX)
LT1178/LT1179
LT2178/LT2179
Input/Output Common Mode Includes Ground, 70µV V
OS(MAX)
and 4µV/°C Drift (Max), 85kHz GBW, 0.04V/µs Slew Rate
475µV V , 500V/mV A , 400kHz GBW
LT1366/LT1367
LT1490/LT1491
OS(MAX)
VOL(MIN)
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 ,
CM EE
Independent of V ; MSOP Package, Shutdown Function
CC
LT1638/LT1639
LT1782
Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
0.4V/µs Slew Rate, 230µA Supply Current per Amplifier
Micropower, Over-The-Top, SOT-23, Rail-to-Rail
Input and Output Op Amp
SOT-23, 800µV V , I = 55µA (Max),
OS(MAX) S
Gain-Bandwidth = 200kHz, Shutdown Pin
LT1783
1.2MHz, Over-The-Top, Micropower, Rail-to-Rail
Input and Output Op Amp
SOT-23, 800µV V , I = 300µA (Max),
Gain-Bandwidth = 1.2MHz, Shutdown Pin
OS(MAX)
S
1637fd
LT 0107 REV D • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
16
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
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