LTC2499_1 datasheet(9/34 Pages) LINER

Part #	LTC2499

Description	24-Bit 8-/16-Channel ?誇 ADC with Easy Drive Input Current Cancellation and I2C Interface

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Manufacturer	LINER [Linear Technology]

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LTC2499

9

2499fc

TYPICAL PERFORMANCE CHARACTERISTICS

Sleep Mode Current

vs Temperature

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)

TEMPERATURE (°C)

–45

0

0.2

0.6

0.8

1.0

2.0

1.4

–15

15

30

90

2499 G25

0.4

1.6

1.8

1.2

–30

0

45

60

75

VCC = 5V

VCC = 2.7V

fO = GND

OUTPUT DATA RATE (READINGS/SEC)

0

500

450

400

350

300

250

200

150

100

80

2499 G26

20

40

60

100

70

10

30

50

90

VCC = 5V

VCC = 3V

VREF = VCC

IN+ = GND

IN– = GND

fO = EXT OSC

TA = 25°C

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–1.5

–0.5

0.5

1.5

2499 G27

2.5

–2

–2.5

–1

0

1

2

VCC = 5V

VREF = 5V

VIN(CM) = 2.5V

fO = GND

25°C, 90°C

–45°C

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–0.75

–0.25

0.25

0.75

2499 G28

1.25

–1.25

VCC = 5V

VREF = 2.5V

VIN(CM) = 1.25V

fO = GND

85°C

–45°C, 25°C

INPUT VOLTAGE (V)

–3

–1

1

3

–2

0

2

–0.75

–0.25

0.25

0.75

2499 G29

1.25

–1.25

VCC = 2.7V

VREF = 2.5V

VIN(CM) = 1.25V

fO = GND

85°C

–45°C, 25°C

OUTPUT READING (μV)

179

8

10

12

186.2

2499 G30

6

4

181.4

183.8

188.6

2

0

16

14

10,000 CONSECUTIVE

READINGS

VCC = 5V

VREF = 5V

VIN = 0V

TA = 25°C

RMS = 0.85μV

AVERAGE = 0.184mV

VREF (V)

0

0.6

0.8

1.0

4

2499 G31

0.4

0.2

0

1

2

3

5

VCC = 5V

VIN = 0V

VIN(CM) = GND

fO = GND

TA = 25°C

VIN(CM) (V)

–1

180

182

186

188

190

200

194

1

3

4

2499 G32

184

196

198

192

0

2

5

6

VCC = 5V

VREF = 5V

VIN = 0V

fO = GND

TA = 25°C

RMS Noise vs VREF

(2x Speed Mode)

Offset Error vs VIN(CM)

(2x Speed Mode)

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LTC2499 Datasheet(PDF) 9 Page - Linear Technology

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