LTC2249 datasheet(2/20 Pages) LINER

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LTC2249

2249f

32 31 30 29 28 27 26 25

10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm × 5mm) PLASTIC QFN

13 14 15 16

AIN+

AIN–

REFH

REFL

VDD

GND

D10

OVDD

OGND

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

OVDD = VDD (Notes 1, 2)

Supply Voltage (VDD) ................................................. 4V

Digital Output Ground Voltage (OGND) ....... –0.3V to 1V

Analog Input Voltage (Note 3) ..... –0.3V to (VDD + 0.3V)

Digital Input Voltage .................... –0.3V to (VDD + 0.3V)

Digital Output Voltage ................ –0.3V to (OVDD + 0.3V)

Power Dissipation ............................................ 1500mW

Operating Temperature Range

LTC2249C ............................................... 0°C to 70°C

LTC2249I .............................................–40°C to 85°C

Storage Temperature Range ..................–65°C to 125°C

Lead Temperature (Soldering, 10 sec).................. 300°C

ORDER PART

NUMBER

QFN PART*

MARKING

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD IS GND (PIN 33)

MUST BE SOLDERED TO PCB

2249

LTC2249CUH

LTC2249IUH

Consult LTC Marketing for parts specified with wider operating temperature ranges.

*The temperature grade is identified by a label on the shipping container.

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. (Note 4)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Resolution (No Missing Codes)

●

Bits

Integral Linearity Error

Differential Analog Input (Note 5)

●

–4

±1

LSB

Differential Linearity Error

Differential Analog Input

●

–1

±0.5

LSB

Offset Error

(Note 6)

●

–12

±212

Gain Error

External Reference

●

–2.5

±0.5

2.5

%FS

Offset Drift

±10

µV/°C

Full-Scale Drift

Internal Reference

±30

ppm/°C

External Reference

±15

ppm/°C

Transition Noise

SENSE = 1V

LSBRMS

CO VERTER CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Analog Input Range (AIN+ –AIN–)

2.7V < VDD < 3.4V (Note 7)

●

1V to 2V

VIN,CM

Analog Input Common Mode

Differential Input (Note 7)

●

1.5

1.9

IIN

Analog Input Leakage Current

0V < AIN+, AIN– < VDD

●

–1

µA

ISENSE

SENSE Input Leakage

0V < SENSE < 1V

●

–3

µA

IMODE

MODE Pin Leakage

●

–3

µA

tAP

Sample-and-Hold Acquisition Delay Time

tJITTER

Sample-and-Hold Acquisition Delay Time Jitter

0.2

psRMS

CMRR

Analog Input Common Mode Rejection Ratio

A ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise

specifications are at TA = 25°C. (Note 4)

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