LT1636
Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amp
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FEATURES
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DESCRIPTIO
Rail-to-Rail Input and Output
Micropower: 50µA IQ, 44V Supply
Operating Temperature Range: – 40°C to 125°C
Over-The-Top®: Input Common Mode Range
Extends 44V Above VEE, Independent of VCC
Low Input Offset Voltage: 225µV Max
Specified on 3V, 5V and ±15V Supplies
High Output Current: 18mA
Output Shutdown
Output Drives 10,000pF with Output Compensation
Reverse Battery Protection to 27V
High Voltage Gain: 2000V/mV
High CMRR: 110dB
220kHz Gain-Bandwidth Product
8-Lead DFN, MSOP, PDIP and SO Packages
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APPLICATIO S
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Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
Over-The-Top is a registered trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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The LT®1636 op amp operates on all single and split supplies
with a total voltage of 2.7V to 44V drawing less than 50µA of
quiescent current. The LT1636 can be shut down, making the
output high impedance and reducing the quiescent current to
4µA. The LT1636 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. The output swings to both
supplies. Unlike most micropower op amps, the LT1636 can
drive heavy loads; its rail-to-rail output drives 18mA. The
LT1636 is unity-gain stable into all capacitive loads up to
10,000pF when a 0.22µF and 150Ω compensation network
is used.
The LT1636 is reverse supply protected: it draws no current
for reverse supply up to 27V. 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.
The LT1636 op amp is available in the 8-pin MSOP, PDIP and
SO packages. For space limited applications the LT1636 is
available in a 3mm × 3mm × 0.8mm dual fine pitch leadless
package (DFN).
TYPICAL APPLICATIO
Input Bias Current vs Common Mode Voltage
5000
Over-The-Top Current Source with Shutdown
VS = 5V, 0V
LT1004-1.2
R*
1M
R
+
LT1636
TPO610
–
IOUT
SHDN
IOUT = 1.2
R
e.g., 10mA = 120Ω
*OPTIONAL FOR LOW OUTPUT CURRENTS
1636 TA01
INPUT BIAS CURRENT (nA)
3000
4V TO
44V
1000
40
30
TA = – 55°C
20
10
TA = 125°C
TA = 25°C
0
–10
4.0
4.4
4.8
5.2 10 20 30 40 50
COMMON MODE VOLTAGE (V)
1636 G03
1636fc
1
LT1636
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W W
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ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V +
(Note 1)
V –)
to
.............................. 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)
LT1636C/LT1636I .............................. – 40°C to 85°C
LT1636H .......................................... – 40°C to 125°C
Specified Temperature Range (Note 4)
LT1636C/LT1636I .............................. – 40°C to 85°C
LT1636H .......................................... – 40°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
(DD Package) ....................................... – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
NULL 1
TOP VIEW
TOP VIEW
NULL
8
+
–IN 2
7
V
+IN 3
6
OUT
V– 4
5
SHDN
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
NULL
–IN
+IN
V–
8
7
6
5
1
2
3
4
NULL
V+
OUT
SHDN
MS8 PACKAGE
8-LEAD PLASTIC MSOP
NULL 1
8
NULL
–IN 2
7
V+
+IN 3
6
OUT
V– 4
5
SHDN
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, θJA = 250°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 150°C/W (N8)
TJMAX = 150°C, θJA = 190°C/W (S8)
TJMAX = 125°C, θJA = 160°C/W (NOTE 2)
UNDERSIDE METAL CONNECTED TO V –
ORDER PART
NUMBER
DD PART*
MARKING
ORDER PART
NUMBER
MS8 PART*
MARKING
ORDER PART
NUMBER
S8 PART*
MARKING
LT1636CDD
LT1636IDD
LAAJ
LT1636CMS8
LT1636IMS8
LTCL
LT1636CN8
LT1636CS8
LT1636IN8
LT1636IS8
LT1636HS8
1636
1636I
1636H
*The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges.
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3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
SYMBOL
VOS
PARAMETER
Input Offset Voltage
CONDITIONS
N8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
S8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
MS8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
●
●
●
●
LT1636C/LT1636I
MIN
TYP
MAX
50
225
400
550
50
225
600
750
50
225
700
1050
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
1636fc
2
LT1636
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3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
SYMBOL
PARAMETER
Input Offset Voltage Drift (Note 9)
IOS
CONDITIONS
DD Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
N8 Package, – 40°C ≤ TA ≤ 85°C
S8 Package, – 40°C ≤ TA ≤ 85°C
MS8 Package, – 40°C ≤ TA ≤ 85°C
DD Package, – 40°C ≤ TA ≤ 85°C
Input Offset Current
VCM = 44V (Note 5)
IB
en
in
RIN
CIN
CMRR
AVOL
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
(Note 5)
Large-Signal Voltage Gain
VOL
Output Voltage Swing LOW
VOH
Output Voltage Swing HIGH
ISC
Short-Circuit Current (Note 2)
PSRR
IS
Power Supply Rejection Ratio
Reverse Supply Voltage
Supply Current
ISD
Supply Current, SHDN
Shutdown Pin Current
tON
tOFF
Output Leakage Current, SHDN
Maximum Shutdown Pin Current
Turn-On Time
Turn-Off Time
VCM = 44V (Note 5)
VS = 0V
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, VCM = 0V to 44V
●
●
●
●
●
●
●
●
●
●
●
VCM = 0V to VCC – 1V
VCM = 0V to 44V (Note 8)
VS = 3V, VO = 500mV to 2.5V, RL = 10k
VS = 3V, 0°C ≤ TA ≤ 70°C
VS = 3V, – 40°C ≤ TA ≤ 85°C
VS = 5V, VO = 500mV to 4.5V, RL = 10k
VS = 5V, 0°C ≤ TA ≤ 70°C
VS = 5V, – 40°C ≤ TA ≤ 85°C
No Load
ISINK = 5mA
VS = 5V, ISINK = 10mA
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
VS = 3V, Short to GND
VS = 3V, Short to VCC
VS = 5V, Short to GND
VS = 5V, Short to VCC
VS = 2.7V to 12.5V, VCM = VO = 1V
IS = – 100µA
(Note 6)
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
VPIN5 = 2V, No Load (Note 6)
VPIN5 = 0.3V, No Load (Note 6)
VPIN5 = 2V, No Load (Note 5)
VPIN5 = 2V, No Load (Note 6)
VPIN5 = 32V, No Load (Note 5)
VPIN5 = 5V to 0V, RL = 10k
VPIN5 = 0V to 5V, RL = 10k
●
●
●
●
●
LT1636C/LT1636I
MIN
TYP
MAX
75
425
900
1050
1
5
2
8
2
10
2
10
0.1
0.8
0.6
5
8
3
6
0.1
0.7
52
0.035
6
10
7
15
4
0
44
84
110
86
98
200
1300
133
100
400
2000
250
200
2
10
480
875
860
1600
2.95
2.985
2.55
2.8
4.95
4.985
4.30
4.75
7
15
20
42
12
25
25
50
90
103
27
40
42
55
60
4
12
0.5
15
1.1
5
0.05
1
27
150
120
2.5
UNITS
µV
µV
µV
µV/°C
µV/°C
µV/°C
µV/°C
nA
µA
nA
µA
nA
µVP-P
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
V
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
V
V
V
V
mA
mA
mA
mA
dB
V
µA
µA
µA
nA
µA
µA
µA
µs
µs
1636fc
3
LT1636
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.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
SYMBOL
GBW
SR
PARAMETER
Gain Bandwidth Product
(Note 5)
Slew Rate
(Note 7)
CONDITIONS
f = 1kHz
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
AV = – 1, RL = ∞
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
●
●
LT1636C/LT1636I
MIN
TYP
MAX
110
200
100
90
0.035
0.07
0.031
0.030
UNITS
kHz
kHz
kHz
V/µs
V/µs
V/µs
±15V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C.
VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4)
LT1636C/LT1636I
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
N8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
S8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
MS8 Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
DD Package
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
●
●
N8 Package, – 40°C ≤ TA ≤ 85°C
S8 Package, – 40°C ≤ TA ≤ 85°C
MS8 Package, – 40°C ≤ TA ≤ 85°C
DD Package, – 40°C ≤ TA ≤ 85°C
Input Offset Voltage Drift (Note 9)
IOS
Input Offset Current
IB
Input Bias Current
Input Noise Voltage
UNITS
100
450
550
700
µV
µV
µV
100
450
750
900
µV
µV
µV
100
450
850
1200
µV
µV
µV
125
650
1050
1200
µV
µV
µV
●
●
●
●
1
2
2
2
4
8
10
10
µV/°C
µV/°C
µV/°C
µV/°C
●
0.2
1.0
nA
●
4
10
0.1Hz to 10Hz
nA
µVP-P
1
en
Input Noise Voltage Density
f = 1kHz
52
nV/√Hz
in
Input Noise Current Density
f = 1kHz
0.035
pA/√Hz
RIN
Input Resistance
Differential
Common Mode, VCM = – 15V to 14V
13
12000
MΩ
MΩ
CIN
Input Capacitance
4
pF
5.2
●
– 15
CMRR
Common Mode Rejection Ratio
VCM = – 15V to 29V
●
86
103
dB
AVOL
Large-Signal Voltage Gain
VO = ±14V, RL = 10k
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
100
75
50
500
●
●
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
●
●
●
Input Voltage Range
29
– 14.997
– 14.500
– 14.125
14.9
14.5
14.3
14.975
14.750
14.650
– 14.95
– 14.07
– 13.35
V
V
V
V
V
V
V
1636fc
4
LT1636
±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)
SYMBOL
PARAMETER
ISC
Short-Circuit Current (Note 2)
PSRR
Power Supply Rejection Ratio
IS
Supply Current
LT1636C/LT1636I
MIN
TYP
MAX
CONDITIONS
Short to GND
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
VS = ±1.35V to ±22V
±30
●
●
±18
±15
±10
●
90
114
GBW
SR
mA
mA
mA
dB
50
70
85
µA
µA
●
ISHDN
UNITS
Positive Supply Current, SHDN
VPIN5 = – 20V, VS = ±22V, No Load
●
12
30
µA
Shutdown Pin Current
VPIN5 = – 21.7V, VS = ±22V, No Load
VPIN5 = – 20V, VS = ±22V, No Load
●
●
0.7
1.2
15
8
nA
µA
Maximum Shutdown Pin Current
VPIN5 = 32V, VS = ±22V
●
27
150
µA
Output Leakage Current, SHDN
VPIN5 = – 20V, VS = ±22V, No Load
●
0.1
2
Gain Bandwidth Product
f = 1kHz
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
AV = – 1, RL = ∞, VO = ±10V Measured at ±5V
0°C ≤ TA ≤ 70°C
– 40°C ≤ TA ≤ 85°C
Slew Rate
µA
220
●
●
125
110
100
kHz
kHz
kHz
0.0375
0.033
0.030
0.075
●
●
V/µs
V/µs
V/µs
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3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
SYMBOL
PARAMETER
VOS
Input Offset Voltage
CONDITIONS
MIN
LT1636H
TYP
MAX
UNITS
50
325
3
µV
mV
3
10
µV/°C
●
●
Input Offset Voltage Drift (Note 9)
IOS
IB
VCM = 44V (Note 5)
●
●
3
1
nA
µA
VCM = 44V (Note 5)
●
●
30
10
nA
µA
Input Offset Current
Input Bias Current
Input Voltage Range
CMRR
Common Mode Rejection Ratio
(Note 5)
VCM = 0.3V to VCC – 1V
VCM = 0.3V to 44V
AVOL
Large-Signal Voltage Gain
VS = 3V, VO = 500mV to 2.5V, RL = 10k
VS = 5V, VO = 500mV to 4.5V, RL = 10k
●
0.3
●
●
72
74
200
20
1300
●
V/mV
V/mV
400
35
2000
●
V/mV
V/mV
44
V
dB
dB
VOL
Output Voltage Swing LOW
No Load
ISINK = 2.5mA
●
●
VOH
Output Voltage Swing HIGH
VS = 3V, No Load
VS = 3V, ISOURCE = 5mA
●
●
2.925
2.35
V
V
VS = 5V, No Load
VS = 5V, ISOURCE = 10mA
●
●
4.925
4.10
V
V
VS = 2.7V to 12.5V, VCM = VO = 1V
●
80
dB
●
2.7
V
PSRR
Power Supply Rejection Ratio
Minimum Supply Voltage
15
875
mV
mV
1636fc
5
LT1636
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3V A D 5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C.
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
SYMBOL
IS
ISD
PARAMETER
CONDITIONS
Reverse Supply Voltage
IS = – 100µA
Supply Current
(Note 6)
MIN
●
LT1636H
TYP
MAX
25
UNITS
V
42
●
55
75
µA
µA
Supply Current, SHDN
VPIN5 = 2V, No Load (Note 6)
●
15
µA
Shutdown Pin Current
VPIN5 = 0.3V, No Load (Note 6)
VPIN5 = 2V, No Load (Note 5)
●
●
200
7
nA
µA
Output Leakage Current, SHDN
VPIN5 = 2V, No Load (Note 6)
●
5
µA
●
Maximum Shutdown Pin Current
VPIN5 = 32V, No Load (Note 5)
GBW
Gain Bandwidth Product
f = 1kHz (Note 5)
SR
Slew Rate
AV = – 1, RL = ∞ (Note 7)
200
µA
200
●
110
60
kHz
kHz
0.035
0.015
0.07
●
V/µs
V/µs
±15V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C.
VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4)
SYMBOL
PARAMETER
VOS
Input Offset Voltage
CONDITIONS
MIN
LT1636H
TYP
MAX
UNITS
100
550
3.4
µV
mV
3
11
µV/°C
●
Input Offset Voltage Drift (Note 9)
●
IOS
Input Offset Current
●
IB
Input Bias Current
CMRR
Common Mode Rejection Ratio
VCM = – 14.7V to 29V
AVOL
Large-Signal Voltage Gain
VO = ±14V, RL = 10k
●
●
72
●
100
4
Output Voltage Swing
No Load
IOUT = ±2.5mA
●
●
PSRR
Power Supply Rejection Ratio
VS = ±1.35V to ±22V
●
84
●
±1.35
Minimum Supply Voltage
nA
50
nA
dB
500
V/mV
V/mV
±14.8
±14.3
VO
IS
5
Supply Current
V
V
dB
V
50
●
70
100
µA
µA
Positive Supply Current, SHDN
VPIN5 = – 20V, VS = ±22V, No Load
●
40
µA
Shutdown Pin Current
VPIN5 = – 21.7V, VS = ±22V, No Load
VPIN5 = – 20V, VS = ±22V, No Load
●
●
200
10
nA
µA
Maximum Shutdown Pin Current
VPIN5 = 32V, VS = ±22V
●
200
µA
Output Leakage Current, SHDN
VPIN5 = – 20V, VS = ±22V, No Load
●
100
µA
VL
Shutdown Pin Input Low Voltage
VS = ±22V
●
VH
Shutdown Pin Input High Voltage
VS = ±22V
●
–20
GBW
Gain Bandwidth Product
f = 1kHz
125
75
220
●
kHz
kHz
0.0375
0.02
0.075
●
V/µs
V/µs
ISHDN
SR
Slew Rate
AV = – 1, RL = ∞, VO = ±10V
Measured at VO = ±5V
–21.7
V
V
1636fc
6
LT1636
ELECTRICAL CHARACTERISTICS
sampled at these temperatures. The LT1636I is guaranteed to meet
specified performance from – 40°C to 85°C. The LT1636H 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 = ±15V or VS = ±22V tests.
Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and
VS = ±15V or VS = ±22V tests.
Note 7: Guaranteed by correlation to slew rate at VS = ±15V and GBW at
VS = 3V and VS = ±15V tests.
Note 8: This specification implies a typical input offset voltage of 600µV at
VCM = 44V and a maximum input offset voltage of 3mV at VCM = 44V.
Note 9: This parameter is not 100% tested.
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. The θJA specified for the DD package is with
minimal PCB heat spreading metal. A significant reduction in θJA can be
obtained with expanded PCB metal area on all layers of a board.
Note 3: The LT1636C and LT1636I are guaranteed functional over the
operating temperature range of – 40°C to 85°C. The LT1636H is
guaranteed functional over the operating temperature range of –40°C to
125°C.
Note 4: The LT1636C is guaranteed to meet specified performance from
0°C to 70°C. The LT1636C is designed, characterized and expected to
meet specified performance from – 40°C to 85°C but is not tested or QA
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
300
60
TA = 25°C
50
40
TA = – 55°C
TA = 125°C
30
20
10
200
100
0
–100
TA = 125°C
TA = – 55°C
5
10 15 20 25 30 35 40
TOTAL SUPPLY VOLTAGE (V)
TA = 25°C
30
TA = – 55°C
20
10
TA = 125°C
TA = 25°C
0
–10
0
45
1
2
3
4
TOTAL SUPPLY VOLTAGE (V)
5
4.0
1636 G03
Output Saturation Voltage
vs Load Current (Output Low)
Output Saturation Voltage
vs Input Overdrive
10
1
OUTPUT SATURATION VOLTAGE (V)
VS = 5V
VOD = 30mV
0.1
TA = 125°C
TA = 25°C
TA = – 55°C
100
1636 G04
4.4
4.8
5.2 10 20 30 40 50
COMMON MODE VOLTAGE (V)
1636 G02
Output Saturation Voltage
vs Load Current (Output High)
0.01
0.1
1
10
0.0001 0.001 0.01
SOURCING LOAD CURRENT (mA)
40
–200
1636 G01
OUTPUT SATURATION VOLTAGE (V)
1000
–300
0
VS = 5V, 0V
3000
100
VS = 5V
VOD = 30mV
OUTPUT SATURATION VOLTAGE (mV)
SUPPLY CURRENT (µA)
70
5000
INPUT BIAS CURRENT (nA)
CHANGE IN INPUT OFFSET VOLTAGE (µV)
80
0
Input Bias Current
vs Common Mode Voltage
Minimum Supply Voltage
1
0.1
TA = 125°C
TA = 25°C
0.01
TA = – 55°C
0.001
0.1
1
10
0.0001 0.001 0.01
SINKING LOAD CURRENT (mA)
80
70
60
50
40
30
20
1636 G05
OUTPUT HIGH
10
0
100
VS = ± 2.5V
NO LOAD
90
OUTPUT LOW
0
10 20 30 40 50 60 70 80 90 100
INPUT OVERDRIVE (mV)
1636 G06
1636fc
7
LT1636
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Noise Voltage Density
vs Frequency
0.1Hz to 10Hz Noise Voltage
Input Noise Current vs Frequency
80
INPUT NOISE CURRENT DENSITY (pA/√Hz)
NOISE VOLTAGE (400nV/DIV)
INPUT NOISE VOLTAGE DENSITY (nV/√Hz)
VS = ± 2.5V
0.35
70
60
50
40
3
4 5 6
TIME (SEC)
7
8
9
1
10
10
100
FREQUENCY (Hz)
Open-Loop Gain and Phase Shift
vs Frequency
100
GAIN (dB)
PHASE
30
20
20
0
–20
0
– 40
–10
– 60
–20
– 80
GAIN-BANDWIDTH PRODUCT (kHz)
40
GAIN
–100
–30
10k
100k
FREQUENCY (Hz)
200
VS = ±1.5V
180
GAIN BANDWIDTH
30
200
20
180
5
10 15 20 25 30 35 40
TOTAL SUPPLY VOLTAGE (V)
45
1636 G13
COMMON MODE REJECTION RATIO (dB)
GAIN-BANDWIDTH PRODUCT (kHz)
240
0
0.09
FALLING, VS = ±15V
0.08
0.07
FALLING, VS = ±1.5V
0.06
160
0.05
50
25
75
0
TEMPERATURE (°C)
100
0.04
– 50
125
– 25
0
50
75
25
TEMPERATURE (°C)
110
100
VS = ±15V
80
70
VS = ±1.5V
60
125
PSRR vs Frequency
80
90
100
1636 G12
120
PHASE MARGIN (DEG)
40
220
RISING, VS = ±15V
0.10
VS = ±15V
CMRR vs Frequency
PHASE MARGIN
RISING, VS = ±1.5V
1636 G11
50
RL = 10k
f = 1kHz
260
Slew Rate vs Temperature
0.11
220
Gain-Bandwidth Product and
Phase Margin vs Supply Voltage
280
1635 G09
240
140
– 50 –25
1M
1000
0.12
1636 G10
300
10
100
FREQUENCY (Hz)
f = 1kHZ
PHASE SHIFT (DEG)
60
40
1k
0.05
1
260
80
50
10
0.10
Gain-Bandwidth Product
vs Temperature
VS = ±2.5V
60
0.15
1636 G08
1636 G07
70
0.20
1000
SLEW RATE (V/µs)
2
POWER SUPPLY REJECTION RATIO (dB)
1
0.25
0
30
0
0.30
50
40
30
70
VS = ±2.5V
60
POSITIVE SUPPLY
50
40
30
20
NEGATIVE SUPPLY
10
0
–10
– 20
20
1K
10K
FREQUENCY (Hz)
100K
1636 G14
1k
10k
FREQUENCY (Hz)
100k
1636 G15
1636fc
8
LT1636
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain-Bandwidth Product and
Phase Margin vs Load Resistance
400
70
350
60
300
50
250
40
200
30
150
20
OUTPUT IMPEDANCE (Ω)
1k
PHASE MARGIN
35
VS = ± 2.5V
AV = 100
100
AV = 10
10
AV = 1
100
20
15
10
1k
0.1
100
0
100k
10k
LOAD RESISTANCE (Ω)
1k
10k
FREQUENCY (Hz)
100
80
4
OVERSHOOT (%)
AV = – 1
2
0
–2
AV = – 1
–4
AV = 1
–6
10
VS = 3V, 0V
VOUT = 2VP-P
VCM = 1.2V
RL = 50k
1
70
AV = 1
60
AV = 2
THD + NOISE (%)
AV = 1
Total Harmonic Distortion + Noise
vs Frequency
VS = ±2.5V
ISOURCE = 40µA
NO OUTPUT COMPENSATION
90
50
40
30
AV = 5
20
0.1
0.01
AV = 10
AV = – 1
AV = 1
10
–8
0
–10
40
60 80 100 120 140 160
SETTLING TIME (µs)
10
100
1000
CAPACITIVE LOAD (pF)
0.1
0.01
100
1k
FREQUENCY (Hz)
10k
1636 G21
Total Harmonic Distortion + Noise
vs Output Voltage
10
RL = 10k
VCM = HALF SUPPLY
f = 1kHz
VS = 3V TOTAL
AV = 1
VIN = 2VP-P AT 1kHz
1
10
1636 G20
Total Harmonic Distortion + Noise
vs Load Resistance
10
0.001
10000
1636 G19
1
VS = ±1.5V
VIN = ±1V
THD + NOISE (%)
20
THD + NOISE (%)
0
100k
1635 G18
Capacitive Load Handling,
Overshoot vs Capacitive Load
VS = ±15V
6
1k
10k
FREQUENCY (Hz)
1635 G17
Settling Time to 0.1%
vs Output Step
8
0
100
100k
1636 G16
10
Vs = ± 2.5V
5
10
50
OUTPUT STEP (V)
25
1
GAIN BANDWIDTH
DISTORTION ≤ 1%
AV = 1
Vs = ±15V
30
OUTPUT SWING (VP-P)
10k
80
VS = ± 2.5V
PHASE MARGIN (DEG)
GAIN-BANDWIDTH PRODUCT (kHz)
450
Undistorted Output Swing
vs Frequency
Output Impedance vs Frequency
VS = 3V, 0V
VIN = 0.5V TO 2.5V
AV = –1
VS = ±1.5V
0.1
AV = –1
VS = 3V, 0V
0.01
VS = 3V, 0V
VIN = 0.2V TO 2.2V
AV = 1
VS = ±1.5V
AV = 1
VS = 3V, 0V
0.001
0.001
100
1k
10k
LOAD RESISTANCE TO GROUND (Ω)
100k
1636 G22
0
2
1
OUTPUT VOLTAGE (VP-P)
3
1636 G23
1636fc
9
LT1636
U W
TYPICAL PERFOR A CE CHARACTERISTICS
CHANGE IN INPUT OFFSET VOLTAGE
(100µV/DIV)
Open-Loop Gain
Large-Signal Response
A
B
A: RL = 2k
B: RL = 10k
C: RL = 50k
B
C
C
Small-Signal Response
A
1636 G24
1636 G25
VS = ±15V
AV = –1
VS = ±15V
AV = 1
1636 G26
U
W
0V
10V
VS = ±15V –10V
OUTPUT VOLTAGE (5V/DIV)
U
U
APPLICATIONS INFORMATION
Supply Voltage
The positive supply pin of the LT1636 should be bypassed
with a small capacitor (about 0.01µF) 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 LT1636 is protected against reverse battery voltages
up to 27V. In the event a reverse battery condition occurs,
the supply current is less than 1nA.
When operating the LT1636 on total supplies of 20V 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.
Inputs
The LT1636 has two input stages, NPN and PNP (see
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
– 4nA. 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 10nA. Increases in temperature will
cause the voltage at which operation switches from the
PNP stage to the NPN stage to move towards V +. The input
offset voltage of the NPN stage is untrimmed and is
typically 600µV.
A Schottky diode in the collector of each NPN transistor of
the NPN input stage allows the LT1636 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 3µA at room temperature. The
input offset voltage is typically 600µV when operating
above V +. The LT1636 will operate with its input 44V above
V – regardless of V +.
The inputs are protected against excursions as much as
22V below V – by an internal 1k 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.
Output
The output voltage swing of the LT1636 is affected by input overdrive as shown in the typical performance curves.
When monitoring voltages within 100mV of V + , gain
should be taken to keep the output from clipping.
The output of the LT1636 can be pulled up to 27V beyond
V + with less than 1nA of leakage current, provided that V +
is less than 0.5V.
1636fc
10
LT1636
U
W
U
U
APPLICATIONS INFORMATION
The normally reverse biased substrate diode from the
output to V – will cause unlimited currents to flow when the
output is forced below V –. If the current is transient and
limited to 100mA, no damage will occur.
returned to ground. The typical performance photo of
Open-Loop Gain for various loads shows the details.
The LT1636 is internally compensated to drive at least
200pF 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.
The LT1636 can be shut down two ways: using the
shutdown pin or bringing V + to within 0.5V of V –. When V +
is brought to within 0.5V of V – both the supply current and
output leakage current drop to less than 1nA. When the
shutdown pin is brought 1.2V above V –, the supply
current drops to about 4µA and the output leakage current
is less than 1µA, independent of V +. In either case the input
bias current is less than 0.1nA (even if the inputs are 44V
above the negative supply).
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 LT1636 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 LT1636 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.
Gain
The open-loop gain is less sensitive to load resistance
when the output is sourcing current. This optimizes performance in single supply applications where the load is
Shutdown
The shutdown pin can be taken up to 32V above V –. The
shutdown pin can be driven below V –, however the pin
current through the substrate diode should be limited with
an external resistor to less than 10mA.
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 ±1mV.
LT1636
8
1
10k
V–
1636 F01
Figure 1. Input Offset Nulling
1636fc
11
LT1636
U
TYPICAL APPLICATIONS
MUX Amplifier Waveforms
MUX Amplifier
5V
+
VIN1
LT1636
SHDN
VOUT
–
5V
+
VIN2
LT1636
SHDN
–
INPUT
SELECT
VS = 5V
VIN1 = 1.2kHz AT 4VP-P, VIN2 = 2.4kHz AT 2VP-P
INPUT SELECT = 120Hz AT 5VP-P
1636 TA05
74HC04
Optional Output Compensation for
Capacitive Loads Greater Than 200pF
VIN
+
LT1636
CL ≤ 10,000pF
–
0.22µF
150Ω
1636 TA09
1636fc
12
LT1636
W
W
SI PLIFIED SCHEMATIC
7 V+
Q1
Q13
D1
– IN
SHDN
2µA
Q25
Q23
R3
1k
R2
30k
5
Q19
D2
2
Q2
R1
1M
D3
Q21
R4
1k
+ IN
Q9
Q10
Q14 Q15
Q18
Q20
Q24
6 OUT
Q22
3
Q11
Q12
Q17
Q16
Q26
Q3
Q4
Q5
Q6 Q7
Q8
D4
D5
NULL
R5
40k
R6
40k
R7
300Ω
R8
300Ω
1
8 NULL
4 V–
1636 SS
1636fc
13
LT1636
U
PACKAGE DESCRIPTION
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
TYP
5
0.38 ± 0.10
8
0.675 ±0.05
3.5 ±0.05
1.65 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ± 0.10
(2 SIDES)
3.00 ±0.10
(4 SIDES)
PIN 1
TOP MARK
PACKAGE
OUTLINE
(DD8) DFN 0203
0.28 ± 0.05
4
0.28 ± 0.05
0.75 ±0.05
0.200 REF
0.50
BSC
2.38 ±0.05
(2 SIDES)
1
0.50 BSC
2.38 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. ALL DIMENSIONS ARE IN MILLIMETERS
3. 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
4. EXPOSED PAD SHALL BE SOLDER PLATED
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
0.42 ± 0.04
(.0165 ± .0015)
TYP
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
8
7 6 5
0.52
(.206)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
NOTE 4
4.90 ± 0.15
(1.93 ± .006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
0.53 ± 0.015
(.021 ± .006)
DETAIL “A”
1
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.077)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.13 ± 0.076
(.005 ± .003)
MSOP (MS8) 0802
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
1636fc
14
LT1636
U
PACKAGE DESCRIPTION
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
1
2
3
4
.255 ± .015*
(6.477 ± 0.381)
.300 – .325
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
(
+.035
.325 –.015
8.255
+0.889
–0.381
.130 ± .005
(3.302 ± 0.127)
.045 – .065
(1.143 – 1.651)
)
.120
(3.048) .020
MIN (0.508)
MIN
.018 ± .003
(0.457 ± 0.076)
.100
(2.54)
BSC
N8 1002
NOTE:
1. DIMENSIONS ARE
INCHES
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)
NOTE 3
.045 ±.005
.050 BSC
8
7
6
5
N
N
.245
MIN
.160 ±.005
1
.030 ±.005
TYP
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
.053 – .069
(1.346 – 1.752)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
1
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(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)
2
3
4
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
SO8 0502
1636fc
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
LT1636
U
TYPICAL APPLICATIONS
Self-Buffered Micropower Reference
Over-The-Top Comparator with Hysteresis
1M
4V TO 44V
3V TO 44V
10k
IN1
(0V TO 44V)
+
–
VOUT
LT1636
–
VOUT = 1.25V
IOUT ≤ 10mA
LT1636
+
1M
1N5711
1M
2N5087
10k
IN2
(0V TO 44V)
1M
1M
0.1µF
2N5210
V
HYSTERESIS = CC
100
1636 TA04
1636 TA03
Lamp Outage Detector
Over-The-Top Current Sense
5V TO 44V
R1
200Ω
3V
5V TO 44V
1M
LAMP
ON/OFF
LT1634-1.25
100k
5k
5V
–
0.5Ω
OUT
LT1636
RS
0.2Ω
+
LT1636
+
VOUT
(0V TO 4.3V)
–
ILOAD
OUT = 0V FOR GOOD BULB
3V FOR OPEN BULB
LOAD
VOUT
ILOAD =
(RS)(R2/R1)
R2
2k
1636 TA08
1636 TA07
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1078/LT1079
LT2078/LT2079
Dual/Quad 55µA Max, Single Supply, Precision Op Amps
Input/Output Common Mode Includes Ground, 70µV VOS(MAX)
and 2.5µV/°C Drift (Max), 200kHz GBW, 0.07V/µs Slew Rate
LT1178/LT1179
LT2178/LT2179
Dual/Quad 17µA Max, Single Supply, Precison Op Amps
Input/Output Common Mode Includes Ground, 70µV VOS(MAX)
and 4µV/°C Drift (Max), 85kHz GBW, 0.04V/µs Slew Rate
LT1366/LT1367
Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
475µV VOS(MAX), 500V/mV AVOL(MIN), 400kHz 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
LT1637
Single Over-The-Top Micropower Rail-to-Rail Input and Output
Op Amp
1.1MHz, VCM Extends 44V above VEE,
Independent of VCC; MSOP Package, Shutdown Function
LT1638/LT1639
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
LT1782
Micropower, Over-The-Top, SOT-23, Rail-to-Rail
Input and Output Op Amp
SOT-23, 800µV VOS(MAX), IS = 55µA (Max),
Gain-Bandwidth = 200kHz, Shutdown Pin
LT1783
1.2MHz, Over-The-Top, Micropower, Rail-to-Rail
Input and Output Op Amp
SOT-23, 800µV VOS(MAX), IS = 300µA (Max),
Gain-Bandwidth = 1.2MHz, Shutdown Pin
1636fc
16
Linear Technology Corporation
LT/LT 0505 REV C • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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