LTC2413IGN datasheet(30/44 Pages) LINER

30 / 44 page

LTC2413

sn2413 2413fs

APPLICATIO S I FOR ATIO

Third, an increase in the frequency of the external oscilla-

tor above 460800Hz (a more than 3

× increaseintheoutput

data rate) will start to decrease the effectiveness of the

internal autocalibration circuits. This will result in a pro-

gressive degradation in the converter accuracy and linear-

ity. Typical measured performance curves for output data

rates up to 100 readings per second are shown in Fig-

Figure 28. Offset Error vs Output Data Rate and Temperature

Figure 29. +FS Error vs Output Data Rate and Temperature

Figure 30. –FS Error vs Output Data Rate and Temperature

OUTPUT DATA RATE (READINGS/SEC)

102030405060708090 100

2413 F28

500

450

400

350

300

250

200

150

100

TA = 85°C

VCC = 5V

REF+ = 5V

REF – = GND

VINCM = 2.5V

VIN = 0V

FO = EXTERNAL OSCILLATOR

TA = 25°C

OUTPUT DATA RATE (READINGS/SEC)

102030405060708090 100

2413 F29

7000

6000

5000

4000

3000

2000

1000

TA = 85°C

VCC = 5V

REF+ = 5V

REF – = GND

IN+ = 3.75V

IN – = 1.25V

FO = EXTERNAL OSCILLATOR

TA = 25°C

OUTPUT DATA RATE (READINGS/SEC)

102030405060708090 100

2413 F30

–1000

–2000

–3000

–4000

–5000

–6000

–7000

TA = 85°C

VCC = 5V

REF+ = 5V

REF – = GND

IN+ = 1.25V

IN – = 3.75V

FO = EXTERNAL OSCILLATOR

TA = 25°C

ures 28 through 35, inclusive. In order to obtain the

highest possible level of accuracy from this converter at

output data rates above 20 readings per second, the user

is advised to maximize the power supply voltage used and

to limit the maximum ambient operating temperature. In

certain circumstances, a reduction of the differential refer-

ence voltage may be beneficial.

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