LT1008 Просмотр технического описания (PDF) - Linear Technology

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LT1008

Picoamp Input Current, Microvolt Offset, Low Noise Op Amp

Linear Technology 

W

FREQUE CY CO PE SATIO CIRCUITS

LT1008

Standard Compensation Circuit

Alternate* Frequency Compensation

R1

–VIN

R3

+VIN

R2

**BANDWIDTH AND SLEW RATE

2–

ARE PROPORTIONAL TO 1/CF

LT1008

3+

1

CF**

6

VOUT

8

CF

≥

R1CO

R1 + R2

CO = 30pF

1008 FCC01

R1

R2

–VIN

2–

6

LT1008

3+

+VIN

8

CS**

100pF

FOR

R2

R1

>

200,

NO

EXTERNAL

FREQUENCY

COMPENSATION

IS

NECESSARY

*IMPROVES REJECTION OF POWER

SUPPLY NOISE BY A FACTOR OF 5

**BANDWIDTH AND SLEW RATE ARE

PROPORTIONAL TO 1/CS

VOUT

1008 FCC02

TYPICAL PERFOR A CE CHARACTERISTICS

Offset Voltage Drift vs Source

Resistance (Balanced or

Unbalanced)

100

10

Offset Voltage vs Source

Resistance (Balanced or

Unbalanced)

10

VS = ±15V

TA = 25°C

1

MAXIMUM

1

TYPICAL

0.1

1k

10k 100k 1M 10M 100M

SOURCE RESISTANCE (Ω)

1008 G01

Warm-Up Drift

5

VS = ±15V

TA = 25°C

4

3

2

METAL CAN (H) PACKAGE

DUAL-IN-LINE PACKAGE

1

PLASTIC (N) OR CERDIP (J)

0

0

1

2

3

4

5

TIME AFTER POWER ON (MINUTES)

1008 G04

MAXIMUM

0.1

TYPICAL

0.01

1k

10k 100k 1M 10M 100M

SOURCE RESISTANCE (Ω)

1008 G02

Long-Term Stability of Four

Representative Units

10

8

6

4

2

0

–2

–4

–6

–8

–10

0

1

2

3

4

5

TIME (MONTHS)

1008 G05

Input Bias Current vs

Common Mode Range

60

VS = ±15V

TA = 25°C

40

DEVICE WITH POSITIVE INPUT CURRENT

20

RINCM = 2 × 1012Ω

0

DEVICE WITH NEGATIVE INPUT CURRENT

–20

–

IB +

VCM

–40

–60

–15 –10 – 5 0

5

10 15

COMMON MODE INPUT VOLTAGE (V)

1008 G03

Offset Voltage Drift with

Temperature of Four

Representative Units

60

40

20

0

–20

–40

–60

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1008 G06

1008fb

5

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