LT1790 datasheet(6/22 Pages) LINEAR

Part #	LT1790

Description	1.5ppm C Drift, Low Noise, Buffered Reference

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Manufacturer	LINEAR [Linear Integrated Systems]

Direct Link	http://www.linearsystems.com

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LT6657

6

6657fb

For more information www.linear.com/LT6657

Typical perForMance characTerisTics ThetestconditionsareT

A = 25°C,

VIN = VOUT + 0.5V, VSHDN = 1.6V, IOUT = 0, COUT = 1µF, unless otherwise noted.

2.5V Supply Current in Shutdown

vs Input Voltage

INPUT VOLTAGE (V)

0

4.0

3.0

2.0

1.0

0.0

20

30

6657 G16

40

125°C

25°C

–40°C

–55°C

VSHDN = 0.4V

Shutdown Pin Current vs

Shutdown Voltage

SHUTDOWN VOLTAGE (V)

–10

10

5

0

–5

–10

–30

–20

–15

–25

20

30

0

10

6657 G15

40

125°C

25°C

–40°C

–55°C

Supply and Ground Currents vs

Load Current

Shutdown Voltage Thresholds vs

Temperature

LOAD CURRENT (mA)

–10

12

8

4

0

–4

–12

–8

5

–5

0

6657 G13

10

125°C

25°C

–40°C

–55°C

CURRENTS GOING INTO

THE PART ARE POSITIVE

GROUND PIN CURRENT

SUPPLY PIN CURRENT

TEMPERATURE (°C)

–50

1.40

1.35

1.30

1.25

1.15

1.00

1.10

1.05

100

0

50

6657 G14

150

VTH(RISING)

VTH(FALLING)

THREE TYPICAL PARTS

TEMPERATURE (°C)

–50 –30 –10 10 30 50 70 90 110 130 150

4.9984

4.9992

5.0000

5.0008

5.0016

6657 G17

TIME (1s/DIV)

6657 G18

5V Output Voltage Temperature

Drift

5V Low Frequency 0.1Hz to 10Hz

Noise

2.5V Minimum VIN to VOUT

Differential (Sinking)

2.5V Power Supply Rejection

Ratio vs Frequency

2.5V Output Impedance vs

Frequency

INPUT-OUTPUT VOLTAGE (mV)

–300

10

0.1

1

–200

–100

–250

–150

–50

0

6657 G10

50

125°C

25°C

–40°C

–55°C

VIN < VOUT

FREQUENCY (kHz)

0.1

1

120

80

40

20

0

100

60

100

10

6657 G11

1000

COUT = 1µF

COUT = 10µF

COUT = 1µF

COUT = 10µF

COUT = 100µF

FREQUENCY (kHz)

1

10

100

1k

0.1

1

10

6657 G12

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