LTC2481CDD datasheet(9/40 Pages) LINER

Part #	LTC2481CDD

Description	16-Bit ?誇 ADC with Easy Drive Input Current Cancellation and I2C Interface

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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9 / 40 page

9

LTC2481

2481f

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–0.75

–0.25

0.25

0.75

2481 G31

1.25

–1.25

VCC = 2.7V

VREF = 2.5V

VIN(CM) = 1.25V

90

°C

–45

°C, 25°C

TYPICAL PERFOR A CE CHARACTERISTICS

Conversion Current

vs Output Data Rate

Integral Nonlinearity (2x Speed

Mode; VCC = 5V, VREF = 5V)

Integral Nonlinearity (2x Speed

Mode; VCC = 5V, VREF = 2.5V)

Integral Nonlinearity (2x Speed

Mode; VCC = 2.7V, VREF = 2.5V)

Noise Histogram

(2x Speed Mode)

RMS Noise vs VREF

(2x Speed Mode)

Offset Error vs VIN(CM)

(2x Speed Mode)

Offset Error vs Temperature

(2x Speed Mode)

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–0.75

–0.25

0.25

0.75

2481 G30

1.25

–1.25

VCC = 5V

VREF = 2.5V

VIN(CM) = 1.25V

90

°C

–45

°C, 25°C

OUTPUT READING (

µV)

179

8

10

12

186.2

2481 G32

6

4

181.4

183.8

188.6

2

0

16

14

10,000 CONSECUTIVE

READINGS

VCC = 5V

VREF = 5V

VIN = 0V

GAIN = 256

TA = 25°C

RMS = 0.86

µV

AVERAGE = 0.184mV

VREF (V)

0

0.6

0.8

1.0

4

2481 G33

0.4

0.2

0

1

2

3

5

VCC = 5V

VIN = 0V

VIN(CM) = GND

TA = 25°C

VIN(CM) (V)

–1

180

182

186

188

190

200

194

1

3

4

2481 G34

184

196

198

192

0

2

5

6

VCC = 5V

VREF = 5V

VIN = 0V

TA = 25°C

TEMPERATURE (

°C)

–45

200

210

220

75

2481 G35

190

180

160

–15

15

45

–30

90

0

30

60

170

240

230

VCC = 5V

VREF = 5V

VIN = 0V

VIN(CM) = GND

OUTPUT DATA RATE (READINGS/SEC)

0

500

450

400

350

300

250

200

150

100

80

2481 G28

20

40

60

100

70

10

30

50

90

VCC = 5V

VCC = 3V

VREF = VCC

IN+ = GND

IN– = GND

CA0/F0 = EXT OSC

TA = 25°C

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–1.5

–0.5

0.5

1.5

2481 G29

2.5

–2

–2.5

–1

0

1

2

VCC = 5V

VREF = 5V

VIN(CM) = 2.5V

25

°C, 90°C

–45

°C

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