Datasheet LT1636IN8, LT1636IDD, LT1636CN8, LT1636CMS8, LT1636CDD Datasheet (Linear Technology)

1

LT1636

1636fb

Over-The-Top

Micropower Rail-to-Rail

Input and Output Op Amp

■

Rail-to-Rail Input and Output

■

Micropower: 50µA IQ, 44V Supply

■

Tiny 3mm × 3mm × 0.8mm DFN Package

■

Operating Temperature Range: –40°C to 125°C

■

Over-The-Top®: Input Common Mode Range
Extends 44V Above VEE, Independent of V

CC

■

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

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).

, LTC and LT are registered trademarks of Linear Technology Corporation.

Over-The-Top is a registered trademark of Linear Technology Corporation.

COMMON MODE VOLTAGE (V)

4.0

–10

INPUT BIAS CURRENT (nA)

0

20

30

40

5.210203040

5000

1636 G03

10

4.4 4.8 50

1000

3000

VS = 5V, 0V

TA = –55°C

T

A

= 125°C

TA = 25°C

Input Bias Current vs Common Mode Voltage

Over-The-Top Current Source with Shutdown

SHDN

I

OUT

LT1004-1.2

1M

*OPTIONAL FOR LOW OUTPUT CURRENTS

4V TO
44V

R

TPO610

1636 TA01

R*

–

+

LT1636

I

OUT

=

e.g., 10mA = 120Ω

1.2
R

■

Battery- or Solar-Powered Systems

Portable Instrumentation
Sensor Conditioning

■

Supply Current Sensing

■

Battery Monitoring

■

MUX Amplifiers

■

4mA to 20mA Transmitters

FEATURES

DESCRIPTIO

U

APPLICATIO S

U

TYPICAL APPLICATIO

U

2

LT1636

1636fb

ABSOLUTE MAXIMUM RATINGS

W

WW

U

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)

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

(Note 1)

ORDER PART

NUMBER

*The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges.

ORDER PART

NUMBER

S8 PART

MARKING

1636
1636I
1636H

LT1636CN8
LT1636CS8
LT1636IN8
LT1636IS8
LT1636HS8

T

JMAX

= 150°C, θJA = 150°C/W (N8)

T

JMAX

= 150°C, θJA = 190°C/W (S8)

PACKAGE/ORDER I FOR ATIO

UUW

MS8 PART

MARKING

LTCL

LT1636CMS8

T

JMAX

= 150°C, θJA = 250°C/W

ORDER PART

NUMBER

DD PART*

MARKING

LAAJLT1636CDD

LT1636IDD

T

JMAX

= 125°C, θJA = 160°C/W (NOTE 2)

TOP VIEW

DD PACKAGE

8-LEAD (3mm × 3mm) PLASTIC DFN

5

6

7

8

4

3

2

1NULL
–IN
+IN

V

–

NULL
V

+

OUT
SHDN

1
2
3
4

8
7
6
5

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

NULL

–IN
+IN

V

–

NULL
V

+

OUT
SHDN

1
2
3
4

8
7
6
5

TOP VIEW

NULL

–IN
+IN

V

–

NULL
V

+

OUT
SHDN

N8 PACKAGE
8-LEAD PDIP

S8 PACKAGE

8-LEAD PLASTIC SO

LT1636C/LT1636I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage N8 Package 50 225 µV

0°C ≤ TA ≤ 70°C ● 400 µV
–40°C ≤ T

A

≤ 85°C ● 550 µV

S8 Package 50 225 µV
0°C ≤ TA ≤ 70°C ● 600 µV
–40°C ≤ T

A

≤ 85°C ● 750 µV

MS8 Package 50 225 µV
0°C ≤ TA ≤ 70°C ● 700 µV
–40°C ≤ T

A

≤ 85°C ● 850 µV

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 = V

OUT

= half supply unless otherwise specified. (Note 4)

3V 5VAUD ELECTRICAL CHARACTERISTICS

UNDERSIDE METAL CONNECTED TO V

–

3

LT1636

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LT1636C/LT1636I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

DD Package 75 425 µV
0°C ≤ T

A

≤ 70°C ● 900 µV

–40°C ≤ TA ≤ 85°C ● 1050 µV

Input Offset Voltage Drift (Note 9) N8 Package, –40°C ≤ TA ≤ 85°C ● 15µV/°C

S8 Package, –40°C ≤ T

A

≤ 85°C ● 28µV/°C
MS8 Package, –40°C ≤ TA ≤ 85°C ● 210µV/°C
DD Package, –40°C ≤ T

A

≤ 85°C ● 210µV/°C

I

OS

Input Offset Current ● 0.1 0.8 nA

VCM = 44V (Note 5) ● 0.6 µA

I

B

Input Bias Current ● 58 nA

V

CM

= 44V (Note 5) ● 36 µA

V

S

= 0V 0.1 nA

Input Noise Voltage 0.1Hz to 10Hz 0.7 µV

P-P

e

n

Input Noise Voltage Density f = 1kHz 52 nV/√Hz

i

n

Input Noise Current Density f = 1kHz 0.035 pA/√Hz

R

IN

Input Resistance Differential 6 10 MΩ

Common Mode, VCM = 0V to 44V 7 15 MΩ

C

IN

Input Capacitance 4pF
Input Voltage Range ● 044V

CMRR Common Mode Rejection Ratio VCM = 0V to VCC – 1V ● 84 110 dB

(Note 5) V

CM

= 0V to 44V (Note 8) ● 86 98 dB

A

VOL

Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k 200 1300 V/mV

V

S

= 3V, 0°C ≤ TA ≤ 70°C ● 133 V/mV

VS = 3V, –40°C ≤ TA ≤ 85°C ● 100 V/mV
VS = 5V, VO = 500mV to 4.5V, RL = 10k 400 2000 V/mV

V

S

= 5V, 0°C ≤ TA ≤ 70°C ● 250 V/mV

VS = 5V, –40°C ≤ TA ≤ 85°C ● 200 V/mV

V

OL

Output Voltage Swing LOW No Load ● 210 mV

I

SINK

= 5mA ● 480 875 mV

VS = 5V, I

SINK

= 10mA ● 860 1600 mV

V

OH

Output Voltage Swing HIGH VS = 3V, No Load ● 2.95 2.985 V

V

S

= 3V, I

SOURCE

= 5mA ● 2.55 2.8 V

VS = 5V, No Load ● 4.95 4.985 V
VS = 5V, I

SOURCE

= 10mA ● 4.30 4.75 V

I

SC

Short-Circuit Current (Note 2) VS = 3V, Short to GND 7 15 mA

V

S

= 3V, Short to V

CC

20 42 mA

VS = 5V, Short to GND 12 25 mA
V

S

= 5V, Short to V

CC

25 50 mA

PSRR Power Supply Rejection Ratio VS = 2.7V to 12.5V, VCM = VO = 1V ● 90 103 dB

Reverse Supply Voltage IS = –100µA ● 27 40 V

I

S

Supply Current (Note 6) 42 55 µA

● 60 µA

Supply Current, SHDN V

PIN5

= 2V, No Load (Note 6) ● 412 µA

I

SD

Shutdown Pin Current V

PIN5

= 0.3V, No Load (Note 6) ● 0.5 15 nA

V

PIN5

= 2V, No Load (Note 5) ● 1.1 5 µA

Output Leakage Current, SHDN V

PIN5

= 2V, No Load (Note 6) ● 0.05 1 µA

Maximum Shutdown Pin Current V

PIN5

= 32V, No Load (Note 5) ● 27 150 µA

t

ON

Turn-On Time V

PIN5

= 5V to 0V, RL = 10k 120 µs

t

OFF

Turn-Off Time V

PIN5

= 0V to 5V, RL = 10k 2.5 µs

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 = V

OUT

= half supply unless otherwise specified. (Note 4)

3V 5VAUD ELECTRICAL CHARACTERISTICS

4

LT1636

1636fb

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 = V

OUT

= half supply unless otherwise specified. (Note 4)

3V 5VAUD ELECTRICAL CHARACTERISTICS

LT1636C/LT1636I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

GBW Gain Bandwidth Product f = 1kHz 110 200 kHz

(Note 5) 0°C ≤ T

A

≤ 70°C ● 100 kHz

–40°C ≤ TA ≤ 85°C ● 90 kHz

SR Slew Rate AV = –1, R

L

= ∞ 0.035 0.07 V/µs

(Note 7) 0°C ≤ T

A

≤ 70°C ● 0.031 V/µs

–40°C ≤ T

A

≤ 85°C ● 0.030 V/µs

LT1636C/LT1636I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage N8 Package 100 450 µV

0°C ≤ TA ≤ 70°C ● 550 µV
–40°C ≤ T

A

≤ 85°C ● 700 µV

S8 Package 100 450 µV
0°C ≤ TA ≤ 70°C ● 750 µV
–40°C ≤ T

A

≤ 85°C ● 900 µV

MS8 Package 100 450 µV
0°C ≤ TA ≤ 70°C ● 850 µV
–40°C ≤ TA ≤ 85°C ● 1000 µV

DD Package 125 650 µV
0°C ≤ T

A

≤ 70°C ● 1050 µV

–40°C ≤ TA ≤ 85°C ● 1200 µV

Input Offset Voltage Drift (Note 9) N8 Package, –40°C ≤ TA ≤ 85°C ● 1 4µV/°C

S8 Package, –40°C ≤ T

A

≤ 85°C ● 2 8 µV/°C

MS8 Package, –40°C ≤ TA ≤ 85°C ● 210µV/°C
DD Package, –40°C ≤ T

A

≤ 85°C ● 210µV/°C

I

OS

Input Offset Current ● 0.2 1.0 nA

I

B

Input Bias Current ● 410 nA
Input Noise Voltage 0.1Hz to 10Hz 1 µV

P-P

e

n

Input Noise Voltage Density f = 1kHz 52 nV/√Hz

i

n

Input Noise Current Density f = 1kHz 0.035 pA/√Hz

R

IN

Input Resistance Differential 5.2 13 MΩ

Common Mode, VCM = –15V to 14V 12000 MΩ

C

IN

Input Capacitance 4pF
Input Voltage Range ● –15 29 V

CMRR Common Mode Rejection Ratio VCM = –15V to 29V ● 86 103 dB
A

VOL

Large-Signal Voltage Gain VO = ±14V, RL = 10k 100 500 V/mV

0°C ≤ TA ≤ 70°C ● 75 V/mV
–40°C ≤ T

A

≤ 85°C ● 50 V/mV

V

OL

Output Voltage Swing LOW No Load ● –14.997 –14.95 V

I

SINK

= 5mA ● –14.500 –14.07 V

I

SINK

= 10mA ● –14.125 –13.35 V

V

OH

Output Voltage Swing HIGH No Load ● 14.9 14.975 V

I

SOURCE

= 5mA ● 14.5 14.750 V

I

SOURCE

= 10mA ● 14.3 14.650 V

The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA␣ ≤␣85°C.
VS = ±15V, VCM = 0V, V

OUT

= 0V, V

SHDN

= V– unless otherwise specified. (Note 4)

±15V ELECTRICAL CHARACTERISTICS

5

LT1636

1636fb

LT1636C/LT1636I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

I

SC

Short-Circuit Current (Note 2) Short to GND ±18 ±30 mA

0°C ≤ T

A

≤ 70°C ● ±15 mA

–40°C ≤ T

A

≤ 85°C ● ±10 mA

PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 90 114 dB
I

S

Supply Current 50 70 µA

● 85 µA

Positive Supply Current, SHDN V

PIN5

= –20V, VS = ±22V, No Load ● 12 30 µA

I

SHDN

Shutdown Pin Current V

PIN5

= –21.7V, VS = ±22V, No Load ● 0.7 15 nA

V

PIN5

= –20V, VS = ±22V, No Load ● 1.2 8 µA

Maximum Shutdown Pin Current V

PIN5

= 32V, VS = ±22V ● 27 150 µA

Output Leakage Current, SHDN V

PIN5

= –20V, VS = ±22V, No Load ● 0.1 2 µA

GBW Gain Bandwidth Product f = 1kHz 125 220 kHz

0°C ≤ T

A

≤ 70°C ● 110 kHz

–40°C ≤ T

A

≤ 85°C ● 100 kHz

SR Slew Rate AV = –1, R

L

= ∞, VO = ±10V Measured at ±5V 0.0375 0.075 V/µs

0°C ≤ T

A

≤ 70°C ● 0.033 V/µs

–40°C ≤ TA ≤ 85°C ● 0.030 V/µs

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, V

OUT

= 0V, V

SHDN

= V– unless otherwise specified. (Note 4)

±15V ELECTRICAL CHARACTERISTICS

LT1636H

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage 50 325 µV

● 3mV

Input Offset Voltage Drift (Note 9) ● 310µV/°C

I

OS

Input Offset Current ● 3nA

V

CM

= 44V (Note 5) ● 1 µA

I

B

Input Bias Current ● 30 nA

VCM = 44V (Note 5) ● 10 µA

Input Voltage Range ● 0.3 44 V

CMRR Common Mode Rejection Ratio VCM = 0.3V to VCC – 1V ● 72 dB

(Note 5) VCM = 0.3V to 44V ● 74 dB

A

VOL

Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k 200 1300 V/mV

● 20 V/mV

VS = 5V, VO = 500mV to 4.5V, RL = 10k 400 2000 V/mV

● 35 V/mV

V

OL

Output Voltage Swing LOW No Load ● 15 mV

I

SINK

= 2.5mA ● 875 mV

V

OH

Output Voltage Swing HIGH VS = 3V, No Load ● 2.925 V

VS = 3V, I

SOURCE

= 5mA ● 2.35 V

VS = 5V, No Load ● 4.925 V
V

S

= 5V, I

SOURCE

= 10mA ● 4.10 V

PSRR Power Supply Rejection Ratio VS = 2.7V to 12.5V, VCM = VO = 1V ● 80 dB

Minimum Supply Voltage ● 2.7 V

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 = V

OUT

= half supply unless otherwise specified. (Note 4)

3V 5VAUD ELECTRICAL CHARACTERISTICS

6

LT1636

1636fb

LT1636H

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Reverse Supply Voltage IS = –100µA ● 25 V

I

S

Supply Current (Note 6) 42 55 µA

● 75 µA

Supply Current, SHDN V

PIN5

= 2V, No Load (Note 6) ● 15 µA

I

SD

Shutdown Pin Current V

PIN5

= 0.3V, No Load (Note 6) ● 200 nA

V

PIN5

= 2V, No Load (Note 5) ● 7 µA

Output Leakage Current, SHDN V

PIN5

= 2V, No Load (Note 6) ● 5 µA

Maximum Shutdown Pin Current V

PIN5

= 32V, No Load (Note 5) ● 200 µA

GBW Gain Bandwidth Product f = 1kHz (Note 5) 110 200 kHz

● 60 kHz

SR Slew Rate AV = –1, R

L

= ∞ (Note 7) 0.035 0.07 V/µs

● 0.015 V/µs

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 = V

OUT

= half supply unless otherwise specified. (Note 4)

3V 5VAUD ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA␣ ≤␣ 125°C.
VS = ±15V, VCM = 0V, V

OUT

= 0V, V

SHDN

= V– unless otherwise specified. (Note 4)

±15V ELECTRICAL CHARACTERISTICS

LT1636H

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage 100 550 µV

● 3.4 mV

Input Offset Voltage Drift (Note 9) ● 3 11µV/°C

I

OS

Input Offset Current ● 5nA

I

B

Input Bias Current ● 50 nA

CMRR Common Mode Rejection Ratio VCM = –14.7V to 29V ● 72 dB
A

VOL

Large-Signal Voltage Gain VO = ±14V, RL = 10k 100 500 V/mV

● 4 V/mV

V

O

Output Voltage Swing No Load ● ±14.8 V

I

OUT

= ±2.5mA ● ±14.3 V

PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 84 dB

Minimum Supply Voltage ● ±1.35 V

I

S

Supply Current 50 70 µA

● 100 µA

Positive Supply Current, SHDN V

PIN5

= –20V, VS = ±22V, No Load ● 40 µA

I

SHDN

Shutdown Pin Current V

PIN5

= –21.7V, VS = ±22V, No Load ● 200 nA

V

PIN5

= –20V, VS = ±22V, No Load ● 10 µA

Maximum Shutdown Pin Current V

PIN5

= 32V, VS = ±22V ● 200 µA

Output Leakage Current, SHDN V

PIN5

= –20V, VS = ±22V, No Load ● 100 µA

V

L

Shutdown Pin Input Low Voltage VS = ±22V ● –21.7 V

V

H

Shutdown Pin Input High Voltage VS = ±22V ● –20 V

GBW Gain Bandwidth Product f = 1kHz 125 220 kHz

● 75 kHz

SR Slew Rate AV = –1, R

L

= ∞, VO = ±10V 0.0375 0.075 V/µs

Measured at V

O

= ±5V ● 0.02 V/µs

7

LT1636

1636fb

TYPICAL PERFOR A CE CHARACTERISTICS

UW

TOTAL SUPPLY VOLTAGE (V)

0

SUPPLY CURRENT (µA)

40

50

60

40352515545

1636 G01

30

20

0

10 20 30

10

80

70

TA = 125°C

TA = 25°C

T

A

= –55°C

Supply Current vs Supply Voltage

COMMON MODE VOLTAGE (V)

4.0

–10

INPUT BIAS CURRENT (nA)

0

20

30

40

5.2 10 20 30 40

5000

1636 G03

10

4.4 4.8 50

1000

3000

VS = 5V, 0V

TA = –55°C

T

A

= 125°C

TA = 25°C

Input Bias Current
vs Common Mode Voltage

SOURCING LOAD CURRENT (mA)

0.0001 0.001

0.01

OUTPUT SATURATION VOLTAGE (V)

0.1

1

0.01 0.1 1 10 100

1636 G04

VS = 5V
V

OD

= 30mV

TA = 125°C

T

A

= 25°C

T

A

= –55°C

Output Saturation Voltage
vs Load Current (Output High)

INPUT OVERDRIVE (mV)

0

OUTPUT SATURATION VOLTAGE (mV)

60

80

100

80

1636 G06

40

20

50

70

90

30

10

0

20

40

60

10 90

30

50

70

100

OUTPUT HIGH

OUTPUT LOW

VS = ±2.5V
NO LOAD

Output Saturation Voltage
vs Input Overdrive

Output Saturation Voltage
vs Load Current (Output Low)

SINKING LOAD CURRENT (mA)

0.0001 0.001

0.001

0.01

OUTPUT SATURATION VOLTAGE (V)

0.1

1

10

0.01 0.1 1 10 100

1636 G05

VS = 5V
V

OD

= 30mV

TA = 125°C

T

A

= –55°C

TA = 25°C

Minimum Supply Voltage

TOTAL SUPPLY VOLTAGE (V)

CHANGE IN INPUT OFFSET VOLTAGE (µV)

–300

–100

300

–200

200

100

0

1234

1636 G02

50

TA = –55°CTA = 125°C

TA = 25°C

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 θ

JA

specified for the DD package is with

minimal PCB heat spreading metal. A significant reduction in θ

JA

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

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: V

S

= 5V limits are guaranteed by correlation to VS = 3V and

V

S

= ±15V or VS = ±22V tests.

Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and
V

S

= ±15V or VS = ±22V tests.

Note 7: Guaranteed by correlation to slew rate at VS = ±15V and GBW at
V

S

= 3V and VS = ±15V tests.

Note 8: This specification implies a typical input offset voltage of 600µV at
V

CM

= 44V and a maximum input offset voltage of 3mV at VCM = 44V.

Note 9: This parameter is not 100% tested.

ELECTRICAL CHARACTERISTICS

8

LT1636

1636fb

TYPICAL PERFOR A CE CHARACTERISTICS

UW

FREQUENCY (Hz)

1k

10

GAIN (dB)

PHASE SHIFT (DEG)

20

30

40

50

10k 100k 1M

1636 G10

0
–10
–20
–30

60

70

–20

0

20

40

60

–40
–60
–80
–100

80

100

VS = ±2.5V

PHASE

GAIN

Open-Loop Gain and Phase Shift
vs Frequency

TEMPERATURE (°C)

–50

SLEW RATE (V/µs)

0.09

0.10

0.11

25

1636 G12

0.08

0.07

–25 0 50 75 100 125

0.06

0.05

0.04

0.12
RISING, VS = ±1.5V

FALLING, V

S

= ±1.5V

FALLING, V

S

= ±15V

RISING, VS = ±15V

Slew Rate vs Temperature

TEMPERATURE (°C)

–50

GAIN-BANDWIDTH PRODUCT (kHz)

220

240

260

25 75

1636 G11

200

180

–25 0

50 100 125

160

140

f = 1kHZ

V

S

= ±15V

V

S

= ±1.5V

Gain-Bandwidth Product
vs Temperature

Gain-Bandwidth Product and
Phase Margin vs Supply Voltage

TOTAL SUPPLY VOLTAGE (V)

0

180

GAIN-BANDWIDTH PRODUCT (kHz)

PHASE MARGIN (DEG)

200

240

260

280

10

20

25 45

1636 G13

220

515

30

35

40

300

20

40

30

50

PHASE MARGIN

GAIN BANDWIDTH

RL = 10k
f = 1kHz

CMRR vs Frequency PSRR vs Frequency

FREQUENCY (Hz)

1k

–20

POWER SUPPLY REJECTION RATIO (dB)

0

20

40

60

10k 100k

1636 G15

–10

10

30

50

70

80

VS = ±2.5V

POSITIVE SUPPLY

NEGATIVE SUPPLY

FREQUENCY (Hz)

1K

20

COMMON MODE REJECTION RATIO (dB)

40

60

80

100

10K 100K

1636 G14

30

50

70

90

110

120

VS = ±15V

V

S

= ±1.5V

FREQUENCY (Hz)

1

0.20

INPUT NOISE CURRENT DENSITY (pA/√Hz)

0.25

0.30

0.35

10 100 1000

1635 G09

0.15

0.10

0.05

0

Input Noise Current vs Frequency

TIME (SEC)

NOISE VOLTAGE (400nV/DIV)

2468

1636 G07

10103579

VS = ±2.5V

0.1Hz to 10Hz Noise Voltage

FREQUENCY (Hz)

1

30

INPUT NOISE VOLTAGE DENSITY (nV/√Hz)

60

70

80

10 100 1000

1636 G08

50

40

Noise Voltage Density
vs Frequency

9

LT1636

1636fb

TYPICAL PERFOR A CE CHARACTERISTICS

UW

Settling Time to 0.1%
vs Output Step

Total Harmonic Distortion + Noise
vs Frequency

CAPACITIVE LOAD (pF)

10

40

OVERSHOOT (%)

50

60

70

80

100 1000 10000

1636 G20

30
20
10

0

90

100

VS = ±2.5V
I

SOURCE

= 40µA

NO OUTPUT COMPENSATION

AV = 1

AV = 5

A

V

= 2

AV = 10

Capacitive Load Handling,
Overshoot vs Capacitive Load

LOAD RESISTANCE TO GROUND (Ω)

0.01

THD + NOISE (%)

0.1

1

10

1k 10k 100k

1636 G22

0.001
100

VS = 3V TOTAL
A

V

= 1

V

IN

= 2V

P-P

AT 1kHz

VS = 3V, 0V

V

IN

= 0.2V TO 2.2V

VS = ±1.5V
V

IN

= ±1V

VS = 3V, 0V

V

IN

= 0.5V TO 2.5V

Total Harmonic Distortion + Noise
vs Load Resistance

Total Harmonic Distortion + Noise
vs Output Voltage

OUTPUT VOLTAGE (V

P-P

)

0.01

THD + NOISE (%)

1

10

023

1636 G23

0.001
1

0.1

RL = 10k
V

CM

= HALF SUPPLY

f = 1kHz

AV = –1

V

S

= ±1.5V

AV = –1
V

S

= 3V, 0V

AV = 1
V

S

= 3V, 0V

AV = 1

V

S

= ±1.5V

SETTLING TIME (µs)

0

–10

OUTPUT STEP (V)

–8

–4

–2

0

10

4

40

80

100

1636 G19

–6

6

8

2

20 60

120

140

160

AV = 1

AV = 1

A

V

= –1

VS = ±15V

AV = –1

FREQUENCY (Hz)

0.01

THD + NOISE (%)

0.1

1

10

100 1k 10k

1636 G21

0.001
10

VS = 3V, 0V
V

OUT

= 2V

P-P

VCM = 1.2V
R

L

= 50k

AV = –1

AV = 1

LOAD RESISTANCE (Ω)

1k

50

GAIN-BANDWIDTH PRODUCT (kHz)

PHASE MARGIN (DEG)

100

150

200

250

450

10k 100k

1636 G16

300

350

400

0

10

20

30

40

80

50

60

70

PHASE MARGIN

GAIN BANDWIDTH

VS = ±2.5V

Gain-Bandwidth Product and
Phase Margin vs Load Resistance

FREQUENCY (Hz)

100

20

OUTPUT SWING (V

P-P

)

25

30

35

1k 10k 100k

1635 G18

15

10

5

0

Vs = ±15V

Vs = ±2.5V

DISTORTION ≤ 1%
A

V

= 1

Undistorted Output Swing
vs Frequency

FREQUENCY (Hz)

100

0.1

OUTPUT IMPEDANCE (Ω)

10

10k

1k 100k10k

1635 G17

1

100

1k

VS = ±2.5V

AV = 100

A

V

= 10

AV = 1

Output Impedance vs Frequency

10

LT1636

1636fb

TYPICAL PERFOR A CE CHARACTERISTICS

UW

CHANGE IN INPUT OFFSET VOLTAGE

(100µV/DIV)

Open-Loop Gain

0V 10V

OUTPUT VOLTAGE (5V/DIV)

A

B

C

C

1636 G24

VS = ±15V
A

V

= –1

1636 G25

A: RL = 2k
B: R

L

= 10k

C: R

L

= 50k

Large-Signal Response

VS = ±15V
A

V

= 1

1636 G26

Small-Signal Response

APPLICATIONS INFORMATION

WUU

U

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.

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 electro-
lytic 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

A

B

–10VV

S

= ±15V

11

LT1636

1636fb

APPLICATIONS INFORMATION

WUU

U

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.

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.

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

returned to ground. The typical performance photo of
Open-Loop Gain for various loads shows the details.

Shutdown

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).

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

10k

1636 F01

V

–

1

8

Figure 1. Input Offset Nulling

12

LT1636

1636fb

TYPICAL APPLICATIONS

U

MUX Amplifier

MUX Amplifier Waveforms

–

+

LT1636

74HC04

1636 TA05

V

IN1

V

OUT

V

IN2

INPUT

SELECT

SHDN

5V

5V

–

+

LT1636

SHDN

VS = 5V
V

IN1

= 1.2kHz AT 4V

P-P

, V

IN2

= 2.4kHz AT 2V

P-P

INPUT SELECT = 120Hz AT 5V

P-P

–

+

LT1636

1636 TA09

V

IN

0.22µF

C

L

≤ 10,000pF

150Ω

Optional Output Compensation for

Capacitive Loads Greater Than 200pF

13

LT1636

1636fb

7

V

+

4

V

–

6

OUT

81

NULLNULL

1636 SS

3

5

+IN

–IN

Q25

Q24

Q26

Q18

Q17

R6
40k

R8
300Ω

R5
40k

R3
1k

R4
1k

SHDN

R7
300Ω

Q16

Q15Q10

Q11

Q9

Q8

Q14

Q2

D5

D2

Q13Q1

2µA

Q20

Q23

D3

Q7

D1

D4

Q6

Q4

Q5

2

R2
30k

R1
1M

Q3

Q19

Q21

Q22

Q12

SCHEMATIC

WW

SI PLIFIED

14

LT1636

1636fb

PACKAGE DESCRIPTION

U

DD Package

8-Lead Plastic DFN (3mm × 3mm)

(Reference LTC DWG # 05-08-1698)

MS8 Package

8-Lead Plastic MSOP

(Reference LTC DWG # 05-08-1660)

3.00 ±0.10

(4 SIDES)

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

0.38 ± 0.10

BOTTOM VIEW—EXPOSED PAD

1.65 ± 0.10

(2 SIDES)

0.75 ±0.05

R = 0.115

TYP

2.38 ±0.10

(2 SIDES)

14

85

PIN 1

TOP MARK

0.200 REF

0.00 – 0.05

(DD8) DFN 0203

0.28 ± 0.05

2.38 ±0.05

(2 SIDES)

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

1.65 ±0.05
(2 SIDES)2.15 ±0.05

0.50
BSC

0.675 ±0.05

3.5 ±0.05

PACKAGE
OUTLINE

0.28 ± 0.05

0.50 BSC

MSOP (MS8) 0802

0.53 ± 0.015
(.021 ± .006)

SEATING

PLANE

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

0.18

(.077)

0.254
(.010)

1.10

(.043)

MAX

0.22 – 0.38

(.009 – .015)

TYP

0.13 ± 0.076
(.005 ± .003)

0.86

(.034)

REF

0.65

(.0256)

BSC

0

° – 6° TYP

DETAIL “A”

DETAIL “A”

GAUGE PLANE

12

3

4

4.90

± 0.15

(1.93 ± .006)

8

7

6

5

3.00 ± 0.102

(.118 ± .004)

(NOTE 3)

3.00 ± 0.102

(.118 ± .004)

NOTE 4

0.52

(.206)

REF

5.23

(.206)

MIN

3.2 – 3.45

(.126 – .136)

0.889

± 0.127

(.035 ± .005)

RECOMMENDED SOLDER PAD LAYOUT

0.42 ± 0.04

(.0165 ± .0015)

TYP

0.65

(.0256)

BSC

15

LT1636

1636fb

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.

PACKAGE DESCRIPTION

U

N8 Package

8-Lead PDIP (Narrow .300 Inch)

(Reference LTC DWG # 05-08-1510)

S8 Package

8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

N8 1002

.065

(1.651)

TYP

.045 – .065

(1.143 – 1.651)

.130 ± .005

(3.302 ± 0.127)

.020

(0.508)

MIN

.018 ± .003

(0.457 ± 0.076)

.120

(3.048)

MIN

1234

876

5

.255 ± .015*

(6.477 ± 0.381)

.400*

(10.160)

MAX

.008 – .015

(0.203 – 0.381)

.300 – .325

(7.620 – 8.255)

.325

+.035
–.015

+0.889
–0.381

8.255

()

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)

.100

(2.54)

BSC

.016 – .050

(0.406 – 1.270)

.010 – .020

(0.254 – 0.508)

× 45°

0°– 8° TYP

.008 – .010

(0.203 – 0.254)

SO8 0502

.053 – .069

(1.346 – 1.752)

.014 – .019

(0.355 – 0.483)

TYP

.004 – .010

(0.101 – 0.254)

.050

(1.270)

BSC

1

N

2

3

4

N/2

.150 – .157

(3.810 – 3.988)

NOTE 3

8

7

6

5

.189 – .197

(4.801 – 5.004)

NOTE 3

.228 – .244

(5.791 – 6.197)

.245
MIN

N

1 2 3 N/2

.160 ±.005

RECOMMENDED SOLDER PAD LAYOUT

.045 ±.005

.050 BSC

.030 ±.005

TYP

INCHES

(MILLIMETERS)

NOTE:

1. DIMENSIONS IN

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)

16

LT1636

1636fb

LT/TP 0303 1K REV B • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1998

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

[phone] ● FAX: [phone]

●

www.linear.com

TYPICAL APPLICATIONS

U

RELATED PARTS

Lamp Outage Detector Over-The-Top Current Sense

–

+

LT1636

5V TO 44V

5V

R1

200Ω

R

S

0.2Ω

R2
2k

V

OUT

(0V TO 4.3V)

1636 TA08

LOAD

I

LOAD

V

OUT

(RS)(R2/R1)

I

LOAD

=

–

+

LT1636

IN1

(0V TO 44V)

IN2

(0V TO 44V)

2N5087

2N5210

1636 TA03

1M

V

OUT

1M

V

CC

100

1M

10k

HYSTERESIS =

10k

1M

3V TO 44V

Over-The-Top Comparator with Hysteresis

Self-Buffered Micropower Reference

–

+

LT1636

1636 TA04

V

OUT

= 1.25V

I

OUT

≤ 10mA

1N5711

LT1634-1.25

0.1µF

1M

4V TO 44V

–

+

LT1636

5k

1M

5V TO 44V

3V

100k

0.5Ω

LAMP

ON/OFF

OUT

1636 TA07

OUT = 0V FOR GOOD BULB

3V FOR OPEN BULB

PART NUMBER DESCRIPTION COMMENTS

LT1078/LT1079 Dual/Quad 55µA Max, Single Supply, Precision Op Amps Input/Output Common Mode Includes Ground, 70µV V

OS(MAX)

LT2078/LT2079 and 2.5µV/°C Drift (Max), 200kHz GBW, 0.07V/µs Slew Rate
LT1178/LT1179 Dual/Quad 17µA Max, Single Supply, Precison Op Amps Input/Output Common Mode Includes Ground, 70µV V

OS(MAX)

LT2178/LT2179 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 V

OS(MAX)

, 500V/mV A

VOL(MIN)

, 400kHz GBW

LT1490/LT1491 Dual/Quad Over-The-Top Micropower, Rail-to-Rail Input and Single Supply Input Range: – 0.4V to 44V, Micropower 50µA

Output Op Amps per Amplifier, Rail-to-Rail Input and Output, 200kHz GBW

LT1637 Single Over-The-Top Micropower Rail-to-Rail Input and Output 1.1MHz, V

CM

Extends 44V above VEE,

Op Amp Independent of VCC; MSOP Package, Shutdown Function

LT1638/LT1639 Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail 0.4V/µs Slew Rate, 230µA Supply Current per Amplifier

Input and Output Op Amps

LT1782 Micropower, Over-The-Top, SOT-23, Rail-to-Rail SOT-23, 800µV V

OS(MAX)

, IS = 55µA (Max),

Input and Output Op Amp Gain-Bandwidth = 200kHz, Shutdown Pin

LT1783 1.2MHz, Over-The-Top, Micropower, Rail-to-Rail SOT-23, 800µV V

OS(MAX)

, IS = 300µA (Max),

Input and Output Op Amp Gain-Bandwidth = 1.2MHz, Shutdown Pin