LINEAR TECHNOLOGY LT1494, LT1495, LT1496 Technical data

查询LT1494供应商

FEATURES

LT1494/LT1495/LT1496

1.5µA Max, Single, Dual

and Quad Over-The-Top Precision

Rail-to-Rail Input and Output Op Amps

U

DESCRIPTIO

■

Low Supply Current: 1.5µA Max

■

Rail-to-Rail Input and Output

■

Low Offset Voltage: 375µV Max

■

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

■

Over-The-Top

■

Wide Supply Range: 2.2V to 36V

■

Single Supply Input Range: –0.3V to 36V

■

Low Input Bias Current: 250pA

■

Low Input Offset Current: 20pA

■

High A

■

Output Sources and Sinks 500µA Load Current

■

Reverse Battery Protected to 18V

VOL

TM

Inputs Operate Above V

+

: 100V/mV Minimum Driving 100kΩ Load

U

APPLICATIO S

■

Battery- or Solar-Powered Systems

■

Portable Instrumentation

■

Remote Sensor Amplifier

■

Micropower Filter

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

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

The LT®1494/LT1495/LT1496 are the lowest power
(IS ≤ 1.5µA) op amps with precision specifications. The
extremely low supply current is combined with excellent
amplifier specifications: input offset voltage is 375µV
maximum with a typical drift of only 0.4µV/°C, input offset
current is 100pA maximum. A minimum open-loop gain
(A

) of 100V/mV ensures that gain errors are small. The

VOL

device characteristics change little over the supply range
of 2.2V to ±15V. Supply rejection is 90dB and the common
mode rejection ratio is 90dB. Operation is specified for 3V,
5V and ±15V supplies. Reverse battery protection
(–18V␣ min) and inputs that operate above the positive
supply make the LT1494/LT1495/LT1496 easy to use in
harsh environments.

The low bias currents and offset current of the amplifier
permit the use of megohm level source resistors without
introducing significant errors. Voltage noise at 4µV

P-P

is

remarkably low considering the low supply current.
The LT1494 is available in the 8-Pin MSOP, PDIP and SO

packages.The LT1495 is available in plastic 8-Pin PDIP
and SO packages with the standard dual op amp pinout.
The LT1496 is available in 14-Pin SO and PDIP packages.

TYPICAL APPLICATION

Micropower Integrating Current Sense

RESET

0.1µF

V

CC

R

I

1M

R

S

0.1Ω

1M

I

L

LOAD

V

CC

OUTPUT SWITCHES
WHEN I

= 3µA DURING INTEGRATION; IS = 5µA END OF INTEGRATION

I

S

–

1/2 LT1495

+

dt = 0.98 VCC

L

200k

R

I

C = (4.9A)(SEC) FOR V

()

R

S

10M10M

U

–

1/2 LT1495

+

TC VOS Distribution

30

100 AMPLIFIERS

= ±2.5V

V

S

25

–40°C TO 85°C

20

15

V

O

1495 TA01

= 5V

CC

UNITS

10

5

0

–1.2 –0.4 0.4 1.2

TC VOS (µV/°C)

2.0–1.6–2.0 –0.8 0 0.8 1.6

1495 TA02

1

LT1494/LT1495/LT1496

1
2
3
4
5
6
7

TOP VIEW

N PACKAGE

14-LEAD PDIP

S PACKAGE

14-LEAD PLASTIC SO

14
13
12
11
10

9
8

OUT A

–IN A
+IN A

V

+

+IN B
–IN B

OUT B

OUT D
–IN D
+IN D
V

–

+IN C
–IN C
OUT C

A

D

B

C

TOP VIEW

NC
V

+

OUT
NC

NC
–IN
+IN

V

–

1

2

3

4

8

7

6

5

N8 PACKAGE
8-LEAD PDIP

S8 PACKAGE

8-LEAD PLASTIC SO

1
2
3
4

8
7
6
5

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

NC
V

+

OUT
NC

NC
–IN
+IN

V

–

WW

W

ABSOLUTE MAXIMUM RATINGS

U

(Note 1)

Total Supply Voltage (V+ to V–) .............................. 36V

Differential Input Voltage ......................................... 36V

Input Current ...................................................... ±10mA

Output Short-Circuit Duration.......................Continuous

Operating Temperature Range (Note 2)

LT1494C/LT1495C/LT1496C .............. –40°C to 85°C

LT1494I/LT1495I/LT1496I ................. –40°C to 85°C

LT1494H/LT1495H/LT1496H ........... –40°C to 125°C

U

W

PACKAGE/ORDER INFORMATION

ORDER PART

NUMBER

LT1494CMS8
LT1494IMS8

T

= 150°C, θJA = 250°C/W

JMAX

MS8 PART MARKING

LTFF
LTFG

Specified Temperature Range (Note 3)

LT1494C/LT1495C/LT1496C .............. –40°C to 85°C

LT1494I/LT1495I/LT1496I ................. –40°C to 85°C

LT1494H/LT1495H/LT1496H ........... –40°C to 125°C

Storage Temperature Range ................. –65°C to 150°C

Junction Temperature........................................... 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

U

ORDER PART

NUMBER

LT1494CN8
LT1494CS8
LT1494IN8
LT1494IS8
LT1494HS8

T

= 150°C, θJA = 130°C/ W (N8)

JMAX

T

= 150°C, θJA = 190°C/ W (S8)

JMAX

S8 PART MARKING

1494
1494I
1494H

Consult LTC Marketing for parts specified with wider operating temperature ranges.

2

TOP VIEW

OUT A

1

–IN A

2

+IN A

N8 PACKAGE
8-LEAD PDIP

A

3

–

V

4

T

= 150°C, θJA = 130°C/ W (N8)

JMAX

= 150°C, θJA = 190°C/W (S8)

T

JMAX

+

V

8

OUT B

7

–IN B

6

B

+IN B

5

S8 PACKAGE

8-LEAD PLASTIC SO

ORDER PART

NUMBER

LT1495CN8
LT1495CS8
LT1495IN8
LT1495IS8
LT1495HS8

S8 PART MARKING

1495
1495I
1495H

T

= 150°C, θJA = 130°C/ W (N)

JMAX

T

= 150°C, θJA = 160°C/ W (S)

JMAX

ORDER PART

NUMBER

LT1496CN
LT1496CS
LT1496IN
LT1496IS
LT1496HS

LT1494/LT1495/LT1496

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half supply, unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

B

I

OS

e

n

i

n

A

VOL

CMRR Common Mode Rejection Ratio V

PSRR Power Supply Rejection Ratio VS = 2.2V to 12V, VCM = VO = 0.5V 90 99 dB

V

OL

V

OH

I

SC

I

S

SR Slew Rate AV = –1, VS = ±5V 0.4 1.0 V/ms
GBW Gain Bandwidth Product f = 100Hz 2.7 kHz

Input Offset Voltage VS = 5V 150 375 µV

V

= 3V 200 475 µV

S

= 5V, MS8 Package 150 475 µV

V

S

VS = 3V, MS8 Package 200 575 µV

Input Bias Current (Note 5) 250 1000 pA

VCM = 10V (Note 6) 180 360 nA

Input Offset Current (Note 5) 20 100 pA
Input Noise Voltage 0.1Hz to 10Hz 4 µV
Input Noise Voltage Density f = 100Hz 185 nV/√Hz
Input Noise Current Density f = 100Hz 10 fA/√Hz
Large-Signal Voltage Gain VS = 5V, VO = 0.25V to 4.5V, RL = 100k 100 500 V/mV

VS = 3V, VO = 0.25V to 2.5V, RL = 100k 50 250 V/mV

Input Voltage Range 0 36 V

= 0V to 4V, VS = 5V 90 106 dB

CM

VCM = 0V to 10V, VS = 5V 74 95 dB

Minimum Operating Supply Voltage 2.1 2.2 V
Output Voltage Swing LOW No Load 50 100 mV

I

= 100µA 210 410 mV

SINK

Output Voltage Swing HIGH No Load V+ – 0.07 V+ – 0.035 V

I

= 100µAV

SOURCE

Short-Circuit Current (Note 5) 0.7 1.3 mA
Supply Current per Amplifier (Note 6) 1.0 1.5 µA
Reverse Supply Voltage IS = 10µA per Amplifier –18 V

+

– 0.32 V+ – 0.160 V

P-P

3

LT1494/LT1495/LT1496

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half
supply, unless otherwise noted. (Note 3)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

VOS TC Input Offset Voltage Drift (Note 4) ● 0.4 2 µV/°C
I

B

I

OS

A

VOL

CMRR Common Mode Rejection Ratio V

PSRR Power Supply Rejection Ratio VS = 2.4V to 12V, VCM = VO = 0.5V ● 89 99 dB

V

OL

V

OH

I

SC

I

S

Input Offset Voltage VS = 5V ● 175 425 µV

= 3V ● 225 525 µV

V

S

= 5V, MS8 Package ● 175 525 µV

V

S

VS = 3V, MS8 Package ● 225 625 µV

Input Bias Current (Note 5) ● 250 1200 pA

VCM = 10V (Note 6) ● 240 500 nA

Input Offset Current (Note 5) ● 20 120 pA
Large-Signal Voltage Gain VS = 5V, VO = 0.25V to 4.5V, RL = 100k ● 75 280 V/mV

VS = 3V, VO = 0.25V to 2.5V, RL = 100k ● 40 150 V/mV

Input Voltage Range ● 0.2 36 V

= 0.2V to 4V, VS = 5V ● 89 106 dB

CM

VCM = 0.2V to 10V, VS = 5V ● 64 85 dB

Minimum Operating Supply Voltage ● 2.3 2.4 V
Output Voltage Swing LOW No Load ● 55 110 mV

I

= 100µA ● 225 450 mV

SINK

Output Voltage Swing HIGH No Load ● V+ – 0.08 V+ – 0.04 V

I

= 100µA ● V+ – 0.36 V+ – 0.18 V

SOURCE

Short-Circuit Current (Note 5) ● 0.6 1.1 mA
Supply Current per Amplifier (Note 6) ● 1.2 1.8 µA

The ● denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VO =
half supply, unless otherwise noted. (Note 3)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

VOS TC Input Offset Voltage Drift (Note 4) ● 0.4 2 µV/°C
I

B

I

OS

A

VOL

CMRR Common Mode Rejection Ratio VCM = 0.2V to 4V, VS = 5V ● 88 106 dB

PSRR Power Supply Rejection Ratio VS = 2.7V to 12V, VCM = VO = 0.5V ● 88 99 dB

V

OL

V

OH

I

SC

I

S

Input Offset Voltage VS = 5V ● 200 475 µV

= 3V ● 250 575 µV

V

S

V

= 5V, MS8 Package ● 200 575 µV

S

VS = 3V, MS8 Package ● 250 675 µV

Input Bias Current (Note 5) ● 250 1700 pA

VCM = 10V (Note 6) ● 275 nA

Input Offset Current (Note 5) ● 20 170 pA
Large-Signal Voltage Gain VS = 5V, VO = 0.25V to 4.5V, RL = 100k ● 55 215 V/mV

VS = 3V, VO = 0.25V to 2.5V, RL = 100k ● 30 115 V/mV

Input Voltage Range ● 0.2 36 V

VCM = 0.2V to 10V, VS = 5V ● 75 dB

Minimum Operating Supply Voltage ● 2.6 2.7 V
Output Voltage Swing LOW No Load ● 60 120 mV

I

= 100µA ● 245 490 mV

SINK

Output Voltage Swing HIGH No Load ● V+ – 0.10 V+ – 0.05 mV

I

= 100µA ● V+ – 0.38 V+ – 0.19 mV

SOURCE

Short-Circuit Current (Note 5) ● 0.4 0.9 mA
Supply Current per Amplifier (Note 6) ● 1.5 2.3 µA

4

LT1494/LT1495/LT1496

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 125°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VO =
half supply, unless otherwise noted. (Note 3)

LT1494H/LT1495H/LT1496H

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

VOS TC Input Offset Voltage Drift (Note 4) ● 0.4 3 µV/°C
I

B

I

OS

A

VOL

CMRR Common Mode Rejection Ratio VCM = 0.5V to 4V, VS = 5V ● 72 95 dB

PSRR Power Supply Rejection Ratio VS = 2.7V to 12V, VCM = VO = 0.5V ● 86 105 dB

V

OL

V

OH

I

S

Input Offset Voltage VS = 5V ● 225 875 µV

VS = 3V ● 275 975 µV

Input Bias Current (Note 5) ● 3.8 10 nA

VCM = 10V (Note 6) ● 0.300 2 µA

Input Offset Current (Note 5) ● 0.3 2 nA
Large-Signal Voltage Gain VS = 5V, VO = 0.25V to 4.5V, RL = 100k ● 425 V/mV

VS = 3V, VO = 0.25V to 2.5V, RL = 100k ● 217 V/mV

Input Voltage Range ● 0.5 36 V

VCM = 0.5V to 10V, VS = 5V ● 85 dB

Minimum Operating Supply Voltage ● 2.7 V
Output Voltage Swing LOW No Load ● 70 160 mV

I

= 100µA ● 275 550 mV

SINK

Output Voltage Swing HIGH No Load ● V+ – 140 V+ – 45 mV

I

= 100µA ● V+ – 450 V+ – 225 mV

SOURCE

Supply Current per Amplifier (Note 6) ● 25µA

TA = 25°C, VS = ±15V, VCM = VO = 0V, unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

B

I

OS

A

VOL

CMRR Common Mode Rejection Ratio VCM = –15V to 14V 100 120 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V 96 120 dB
V

OL

V

OH

I

SC

I

S

Input Offset Voltage 200 575 µV

MS8 Package 200 675 µV

Input Bias Current 25 1000 pA
Input Offset Current 20 100 pA
Large-Signal Voltage Gain VO = ±10V, RL = 100k 100 360 V/mV
Input Voltage Range –15 21 V

Output Voltage Swing LOW RL = 1M –14.85 –14.70 V

RL = 100k –14.75 –14.50 V

Output Voltage Swing HIGH RL = 1M 14.78 14.89 V

RL = 100k 14.62 14.81 V

Short-Circuit Current 0.7 1.5 mA
Supply Current per Amplifier 1.4 2.0 µA

5