ADS1018 datasheet(3/34 Pages) TI1

Numer części	ADS1018

Szczegółowy opis	Ultra-Small, Low-Power, SPI-Compatible, 16-Bit Analog-to-Digital Converter and Temperature Sensor with Internal Reference

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Producent	TI1 [Texas Instruments]

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ADS1118

www.ti.com

SBAS457A

– OCTOBER 2010 – REVISED JULY 2011

ELECTRICAL CHARACTERISTICS

Maximum/minimum specifications at

–40°C to +125°C, VDD = 3.3V, data rate = 8SPS, and full-scale (FS) = ±2.048V, unless

otherwise noted. Typical values are at +25

°C, VDD = 3.3V, data rate = 8SPS, and full-scale (FS) = ±2.048V, unless otherwise

noted.

ADS1118

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUT

Full-scale input voltage(1)

VIN = (AINP) – (AINN)

±4.096/PGA

V

Analog input voltage

AINP or AINN to GND

GND

VDD

V

Differential input impedance

See Table 1

FS =

±6.144V(1)

8

M

Ω

FS =

±4.096V(1), ±2.048V

6

M

Ω

Common-mode input impedance

FS =

±1.024V

3

M

Ω

FS =

±0.512V, ±0.256V

100

M

Ω

SYSTEM PERFORMANCE

Resolution

No missing codes

16

Bits

Data rate (DR)

8, 16, 32, 64, 128, 250, 475, 860

SPS

Data rate variation

All data rates

–10

10

%

Output noise

See Typical Characteristics

Integral nonlinearity

DR = 8SPS, FS =

±2.048V, best fit(2)

1

LSB

FS =

±2.048V, differential inputs

±0.1

±2

LSB

Offset error

FS =

±2.048V, single-ended inputs

±0.25

LSB

Offset drift

FS =

±2.048V

0.002

LSB/

°C

Offset power-supply rejection

FS =

±2.048V, with dc supply variation

0.2

LSB/V

Gain error(3)

FS =

±2.048V at +25°C

0.01

0.15

%

FS =

±0.256V

7

ppm/

°C

Gain drift(3)(4)

FS =

±2.048V

5

40

ppm/

°C

FS =

±6.144V(1)

5

ppm/

°C

Gain power-supply rejection

10

ppm/V

PGA gain match(3)

Match between any two PGA gains

0.01

0.1

%

Gain match

Match between any two inputs

0.01

0.1

%

Offset match

Match between any two inputs

0.6

LSB

At dc and FS =

±0.256V

105

dB

At dc and FS =

±2.048V

100

dB

Common-mode rejection

At dc and FS =

±6.144V(1)

90

dB

fCM = 60Hz, DR = 860SPS

105

dB

fCM = 50Hz, DR = 860SPS

105

dB

TEMPERATURE SENSOR

Temperature sensor range

–40

+125

°C

Temperature sensor resolution

0.03125

°C/LSB

0

°C to +70°C

0.2

±0.5

°C

Temperature sensor accuracy

–40°C to +125°C

0.4

±1

°C

vs supply

0.03125

±0.25

°C/V

(1)

This parameter expresses the full-scale range of the ADC scaling. In no event should more than the smaller of VDD + 0.3V or 5.5V be

applied to this device.

(2)

Best fit INL covers 99% of full-scale.

(3)

Includes all errors from onboard PGA and reference.

(4)

Not production tested; ensured by characterization.

Copyright

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