LT1790 datasheet(4/16 Pages) LINER

Part #	LT1790

Description	Easy-to-Use, Ultra-Tiny, Differential, 16-Bit ADC With I2C Interface

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Manufacturer	LINER [Linear Technology]

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LTC2453

4

2453f

TYPICAL PERFORMANCE CHARACTERISTICS

Integral Nonlinearity, VCC = 5V

Integral Nonlinearity, VCC = 3V

Maximum INL vs Temperature

The

● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. (Notes 2, 7)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tCONV

Conversion Time

●

13

16.6

23

ms

fSCL

SCL Clock Frequency

●

0

400

kHz

tHD(SDA)

Hold Time (Repeated) START Condition

●

0.6

μs

tLOW

LOW Period of the SCL Pin

●

1.3

μs

tHIGH

HIGH Period of the SCL Pin

●

0.6

μs

tSU(STA)

Set-Up Time for a Repeated START Condition

●

0.6

μs

tHD(DAT)

Data Hold Time

●

0

0.9

μs

tSU(DAT)

Data Set-Up Time

●

100

ns

tr

Rise Time for SDA/SCL Signals

(Note 6)

●

20 + 0.1CB

300

ns

tf

Fall Time for SDA/SCL Signals

(Note 6)

●

20 + 0.1CB

300

ns

tSU(STO)

Set-Up Time for STOP Condition

●

0.6

μs

tBUF

Bus Free Time Between a Stop and Start Condition

●

1.3

μs

tOF

Output Fall Time VIHMIN to VILMAX

Bus Load CB 10pF to

400pF (Note 6)

●

20 + 0.1CB

250

ns

tSP

Input Spike Suppression

●

50

ns

I2C TIMING CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2. All voltage values are with respect to GND. VCC = 2.7V to 5.5V

unless otherwise speciﬁed.

VREF = VREF+ – VREF–, VREFCM = (VREF+ + VREF–)/2, FS = VREF+ – VREF–;

VIN = VIN+ – VIN–, –VREF ≤ VIN ≤ VREF; VINCM = (VIN+ + VIN–)/2.

Note 3. Guaranteed by design, not subject to test.

Note 4. Integral nonlinearity is deﬁned as the deviation of a code from a

straight line passing through the actual endpoints of the transfer curve.

Guaranteed by design and test correlation.

Note 5. Input sampling current is the average input current drawn from

the input sampling network while the LTC2453 is converting.

Note 6. CB = capacitance of one bus line in pF.

Note 7. All values refer to VIH(MIN) and VIL(MAX) levels.

Note 8. A positive current is ﬂowing into the DUT pin.

DIFFERENTIAL INPUT VOLTAGE (V)

–5

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

3

2453 G01

–3

–1

1

5

2

–4

–2

0

4

VCC = 5V

VREF

+ = 5V

VREF

– = 0V

TA = –45°C, 25°C, 90°C

DIFFERENTIAL INPUT VOLTAGE (V)

–3

–0.5

0

0.5

0

2

2453 G02

–1.0

–1.5

–2.0

–2

–1

1

1.0

1.5

2.0

3

VCC = 3V

VREF

+ = 3V

VREF

– = 0V

TA = –45°C, 25°C, 90°C

TEMPERATURE (

°C)

–50

0

0.5

1.0

1.5

2.0

–25

0

25

50

2453 G03

75

100

VCC = VREF

+ = 5V, 4.1V, 3V

(TA = 25°C, unless otherwise noted)

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