Linear Technology LT1097 Datasheet

FEATURES

INPUT OFFSET VOLTAGE (µV)

–50 –40 –30 –20 –10 0 10 20 30 40 50

PERCENT OF UNITS

LT1097 • G01

50

40

30

20

10

0

VS = ±15V
T

A

= 25°C

6,500 UNITS IN SO PACKAGE
6,680 UNITS IN

PLASTIC
DIP

13,180 UNITS

TESTED

■

Offset Voltage 50µV Max

■

Offset Voltage Drift 1µV/°C Max

■

Bias Current 250pA Max

■

Offset Current 250pA Max

■

Bias and Offset Current Drift 4pA/°C Max

■

Supply Current 560µA Max

■

0.1Hz to 10Hz Noise 0.5µVp-p, 2.2pAp-p

■

CMRR 115dB Min

■

Voltage Gain 117dB Min

■

PSRR 114dB Min

■

Guaranteed Operation on Two NiCad Batteries

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APPLICATIONS

■

Replaces OP-07/OP-77/OP-97/OP-177/AD707/
LT1001 with Improved Price/Performance

■

High Impedance Difference Amplifiers

■

Logarithmic Amplifiers (Wide Dynamic Range)

■

Thermocouple Amplifiers

■

Precision Instrumentation

■

Active Filters (with Small Capacitors)

LT1097

Low Cost, Low Power

Precision Op Amp

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DESCRIPTION

LT®1097 achieves a new standard in combining low price
and outstanding precision performance.

On all operational amplifier data sheets, the specifications
listed on the front page are for highly selected, expensive
grades, while the specs for the low cost grades are buried
deep in the data sheet.

The LT1097 does not have any selected grades, the
outstanding specifications shown in the Features section
are for its only grade.

The design effort of the LT1097 concentrated on optimiz­ing the performance of all precision specs—at only 350µA
of supply current. Typical values are 10µV offset voltage,
40pA bias and offset currents, 0.2µV/°C and 0.4pA/°C
drift. Common mode and power supply rejections, voltage
gain are typically in excess of 128dB.

All parameters that are important for precision, low power
op amps have been optimized. Consequently, using the
LT1097 error budget calculations in most applications is
unnecessary.

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

TYPICAL APPLICATION

Saturated Standard Cell Amplifier

2N3609

+

1.018235V

SATURATED
STANDARD
CELL #101
EPPLEY LABS
NEWPORT, R. I.

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9V

7

3

+

LT1097

2

–

R1
20k

THE TYPICAL 40pA BIAS CURRENT OF THE LT1097
WILL DEGRADE THE STANDARD CELL BY ONLY
1ppm/YEAR. NOISE IS A FRACTION OF A ppm.
UNPROTECTED GATE MOSFET ISOLATES
STANDARD CELL ON POWER DOWN.

6

OUT = 1.1V TO 8.0V
AS 1.8k ≤ R2 ≤ 135k

4

R2

Input Offset Voltage Distribution

LT1097•TA01

1

LT1097

WW

W

U

ABSOLUTE MAXIMUM RATINGS

Supply Voltage ...................................................... ±20V

Differential Input Current (Note 1) ...................... ±10mA

Input Voltage ......................................................... ±20V

Output Short Circuit Duration .......................... Indefinite

U

W

Operating Temperature Range .................–40°C to 85°C

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

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

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PACKAGE/ORDER INFORMATION

TOP VIEW

TRIM

V

OS

1

–IN

2

+IN

3

–

V

4

N8 PACKAGE

8-LEAD PLASTIC DIP

VOS TRIM

8

+

V

7

OUT

6

OVER COMP

5

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

V

OS

∆V

∆TIME Voltage Stability

I

OS

I

B

e

n

i

n

CMRR Common Mode Rejection Ratio VCM = ±13.5V 115 130 115 130 dB
PSRR Power Supply Rejection Ratio VS = ±1.2V to ±20V 114 130 114 130 dB
A

VOL

V

OUT

SR Slew Rate 0.1 0.2 0.1 0.2 V/µs
GBW Gain Bandwidth Product 700 700 kHz
I

S

Input Offset Voltage 10 50 10 60 µV
Long Term Input Offset 0.3 0.3 µV/Mo

OS

Input Offset Current 40 250 60 350 pA
Input Bias Current ±40 ±250 ±50 ±350 pA
Input Noise Voltage 0.1Hz to 10Hz 0.5 0.5 µVp-p
Input Noise Voltage Density fO = 10Hz 16 16 nV/√Hz

Input Noise Current 0.1Hz to 10Hz 2.2 2.4 pAp-p
Input Noise Current Density fO = 10Hz 0.03 0.035 pA/√Hz

Input Resistance (Note 2)

Differential Mode 30 80 25 70 MΩ
Common Mode 10

Input Voltage Range ±13.5 ±14.3 ±13.5 ±14.3 V

Large Signal Voltage Gain VO = ±12V, RL = 10k 700 2500 700 2500 V/mV

Output Voltage Swing RL = 10k ±13 ±13.8 ±13 ±13.8 V

Supply Current 350 560 350 560 µA
Offset Adjustment Range R
Minimum Supply Voltage (Note 3) ±1.2 — ±1.2 — V

ORDER

PART NUMBER

LT1097CN8

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

= 1000Hz 14 14 nV/√Hz

f

O

= 1000Hz 0.008 0.008 pA/√Hz

f

O

V

= ±10V, RL = 2k 250 1000 250 1000 V/mV

O

= 2k ±11.5 ±13 ±11.5 ±13 V

R

L

= 10k, Wiper to V

POT

VOS TRIM

–IN
+IN

V

+

TOP VIEW

1

2

3

–

4

S8 PACKAGE

8-LEAD PLASTIC SO

LT1097CN8 LT1097S8

12

±600 ±600 µV

8

VOS TRIM
V

7

OUT

6

OVER COMP

5

+

ORDER

PART NUMBER

LT1097S8

11

8•10

Ω

2

LT1097

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

V

OS

I

OS

I

B

A

VOL

CMRR Common Mode Rejection Ratio VCM = ±13.5V ● 112 128 112 128 dB
PSRR Power Supply Rejection Ratio VS = ±1.3V to ±20V ● 111 128 111 128 dB

V

OUT

I

S

Input Offset Voltage ● 20 100 20 130 µV
Average Temperature Coefficient of (Note 4) ● 0.2 1 0.2 1.4 µV/°C

Input Offset Voltage
Input Offset Current ● 60 430 75 570 pA
Average Temperature Coefficient of (Note 4) ● 0.4 4 0.5 5 pA/°C

Input Offset Current
Input Bias Current ● ±60 ±430 ±75 ±570 pA
Average Temperature Coefficient of (Note 4) ● 0.4 4 0.5 5 pA/°C

Input Bias Current
Large Signal Voltage Gain V

Input Voltage Range ● ±13.5 ±14.2 ±13.5 ±14.2 V
Output Voltage Swing RL = 10k ● ±13 ±13.7 ±13 ±13.7 V
Supply Current ● 380 700 380 700 µA

= ±12V, RL ≥ 10k ● 450 2000 450 2000 V/mV

OUT

= ±10V, RL ≥ 2k ● 180 800 180 800 V/mV

V

OUT

VS = ±15V, VCM = 0V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.

LT1097CN8 LT1097S8

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

V

OS

I

OS

I

B

A

VOL

CMRR Common Mode Rejection Ratio VCM = ±13.5V ● 108 127 108 127 dB
PSRR Power Supply Rejection Ratio VS = ±1.5V to ±20V ● 108 127 108 127 dB

V

OUT

I

S

The ● denotes specifications which apply over the full operating
temperature range.

Note 1: Differential input voltages greater than 1V will cause excessive
current to flow through the input protection diodes unless limiting
resistance is used.

Note 2: This parameter is guaranteed by design and is not tested.

Input Offset Voltage ● 25 130 30 170 µV
Average Temperature Coefficient of ● 0.3 1.2 0.3 1.6 µV/°C

Input Offset Voltage
Input Offset Current ● 70 600 85 750 pA
Average Temperature Coefficient of ● 0.5 5 0.6 6 pA/°C

Input Offset Current
Input Bias Current ● ±70 ±600 ±85 ±750 pA
Average Temperature Coefficient of ● 0.5 5 0.6 6 pA/°C

Input Bias Current
Large Signal Voltage Gain V

Input Voltage Range ● ±13.5 ±14 ±13.5 ±14 V
Output Voltage Swing RL = 10k ● ±13 ±13.6 ±13 ±13.6 V
Supply Current ● 400 800 400 800 µA

= ±12V, RL ≥ 10k ● 300 1700 300 1700 V/mV

OUT

= ±10V, RL ≥ 2k ● 700 700 V/mV

V

OUT

VS = ±15V, VCM = 0V, –40°C ≤ TA ≤ 85°C, unless otherwise noted. (Note 5)

LT1097CN8 LT1097S8

Note 3: Power supply rejection ratio is measured at the minimum supply

voltage.

Note 4: This parameter is not 100% tested.
Note 5: The LT1097 is designed, characterized and expected to meet these

extended temperature limits, but is not tested at –40°C and 85°C.
Guaranteed I grade parts are available; consult factory.

3

LT1097

COMMON MODE INPUT VOLTAGE

–15 –5 5–10 0 10 15

INPUT BIAS CURRENT (pA)

1097 • G06

120

80

40

0

–40

–80

–120

VS = ±15V
T

A

= 25°C

R

IN CM

= 1012Ω

DEVICE WITH POSITIVE INPUT CURRENT

DEVICE WITH NEGATIVE INPUT CURRENT

V

CM

I

B

+

–

W

U

TYPICAL PERFORMANCE CHARACTERISTICS

Distribution to Offset Voltage Drift
with Temperature

50

Input Bias Current vs Temperature

200

100

0

–100

INPUT BIAS CURRENT (pA)

–200

–300

–50 0 50–25 25 75 100

UNDERCANCELLED UNIT

OVERCANCELLED UNIT

TEMPERATURE (°C)

40

30

20

PERCENT OF UNITS

10

0

–1.5–1.2–0.9–0.6 –0.3 0 0.3 0.6 0.9 1.2 1.5

OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)

1097 • G03

VS = ±15V
240 UNITS TESTED
IN N8 PACKAGES
FROM SIX RUNS

LT1097 • G02

V+ –0.2

+

V

+

V

+

V

–

V

–

V

–

V

–

V

COMMON MODE RANGE OR OUTPUT SWING (V)

Minimum Supply Voltage,
Common Mode Range and
Voltage Swing at V

+

V

–0.4

CM RANGE

–0.6
–0.8

+0.8
+0.6

CM RANGE

+0.4
+0.2

–

V

–40 –10 20 50 80 110

TEMPERATURE (°C)

MIN

SWING

RL = 10k

SWING

1097 • G04

±1.4

MINIMUM SUPPLY VOLTAGE, V

±1.2
±1.0
±0.8

MIN

(V)

Warm-Up Drift

5

VS = ±15V
T

4

4

3

2

1

CHANGE IN OFFSET VOLTAGE (µV)

0

012345

= 25°C

A

PLASTIC-IN-LINE PACKAGE
PLASTIC (N) OR SO (S)

TIME AFTER POWER ON (MINUTES)

Input Bias Current Over Common
Mode Range

1097 • G05