LTC2995 datasheet(5/90 Pages) AD

5 / 90 page

LTM2985

Rev. 0

For more information www.analog.com

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Resolution (No Missing Codes)

–FS ≤ VIN ≤ +FS

Bits

Integral Nonlinearity

VIN(CM) = 1.25 (Note 14)

ppm of VREF

Offset Error

0.5

μV

Offset Error Drift

(Note 3)

nV/ºC

Positive Full-Scale Error

(Notes 2, 14)

100

ppm of VREF

Positive Full-Scale Drift

(Notes 2, 14)

0.1

ppm of VREF/ºC

Input Leakage

I-Grade, C-Grade (Note 18)

Negative Full-Scale Error

(Notes 2, 14)

100

ppm of VREF

Negative Full-Scale Drift

(Notes 2, 14)

0.1

ppm of VREF/ºC

Input Referred Noise

I-Grade, C-Grade (Note 4)

0.8

1.5

µVRMS

Common Mode Input Range

–0.05

VCC2 – 0.3

RTD Excitation Current

(Note 15)

–25

Table 33

RTD Excitation Current Matching

Continuously Calibrated

Error within Noise Level of ADC

Thermistor Excitation Current

(Note 15)

–37.5

Table 57

37.5

Input Range

All Analog Input Channels

–0.05

VCC2 – 0.3

Output Rate

Two Conversion Cycle Mode (Notes 5, 8)

150

164

170

Three Conversion Cycle Mode (Notes 5, 8)

225

246

255

Input Common Mode Rejection

50Hz/60Hz (Note 3)

120

Input Normal Mode Rejection

60Hz (Notes 3, 6)

120

50Hz (Notes 3, 7)

120

50Hz/60Hz (Notes 3, 5, 8)

Analog Power-Up

(Note 10)

100

Digital Initialization

(Note 11)

100

REFERENCE ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over

the full operating temperature range, otherwise specifications are at TA = 25°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Output Voltage

VREF (Note 9)

2.49

2.51

Output Voltage Temperature Coefficient

I-Grade

ppm/ºC

C-Grade

ppm/ºC

Load Regulation

IOUT(SOURCE) = 100µA

IOUT(SINK) = 100µA

mV/mA

Output Voltage Noise

0.1Hz ≤ f ≤ 10Hz

10Hz ≤ f ≤ 1kHz

4.5

μVP-P

Output Short Circuit Current

Short VREF to GND

Short VREF to VCC2

Long Term Drift of Output Voltage

(Notes 3, 12)

ppm/√kHr

Hysteresis

∆T = 0ºC to 70ºC (Note 13)

∆T = –40ºC to 85ºC (Note 13)

ppm

ADC ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full

operating temperature range, otherwise specifications are at TA = 25°C.

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