ADS1285 datasheet(4/67 Pages) TI

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)

MIN

MAX

UNIT

Power supply voltages

AVDD1 to AVSS

–0.3

5.5

AVSS to AGND

–2.8

0.3

AVDD2 to AGND

–0.3

5.5

AVDD2 to AVSS

–0.3

5.5

IOVDD to DGND

–0.3

3.9

IOVDD to DGND (IOVDD connected to CAPD)

–0.3

2.2

Grounds

AGND to DGND

– 0.3

0.3

Analog input voltage

AIN1P, AIN1N, AIN2P, AIN2N, REFP, REFN

AVSS – 0.3

AVDD1 + 0.3

Digital input voltage

CLK, DIN, SCLK, CS, GPIO0, GPIO1, SYNC, RESET, PWDN

DGND – 0.3

IOVDD + 0.3

Input current

Continuous, any digital or analog pin (2)

–10

Temperature

Junction, TJ

150

°C

Storage, Tstg

–60

150

°C

(1)

Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply

functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions.

If briefly operating outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not

sustain damage, but it may not be fully functional – this may affect device reliability, functionality, performance, and shorten the device

lifetime.

(2)

Analog input pins AIN1P, AIN1N, AIN2P, AIN2N, REFP and REFN are diode-clamped to AVDD1 and AVSS. Limit the input current to

10 mA in the event the analog input voltage exceeds AVDD1 + 0.3 V or AVSS – 0.3 V. Digital input pins are clamped to IOVDD and

DGND. Limit the input current if the digital input voltage exceeds IOVDD + 0.3 V or DGND – 0.3 V.

6.2 ESD Ratings

VALUE

UNIT

V(ESD)

Electrostatic discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)

2000

Charged-device model (CDM), per JEDEC JESD22-C101(2)

1000

(1)

JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2)

JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)

MIN

NOM

MAX

UNIT

POWER SUPPLY

Analog power supplies

AVDD1 to AVSS

5.25

AVDD1 to AGND

2.375

AVSS to AGND

–2.625

AVDD2 to AGND

2.375

5.25

AVDD2 to AVSS

5.25

Digital power supply

IOVDD to DGND

2.7

3.6

IOVDD connected to CAPD

1.65

1.95

ANALOG INPUTS

VIN

Differential input voltage

VIN = VAINP – VAINN

Reference voltage = 5 V

±VREF / (2 × Gain)

Reference voltage = 4.096 V

±VREF / (1.6384 × Gain)

Reference voltage = 2.5 V

±VREF / Gain

Absolute input voltage

Buffer operation

AVSS + 0.1

AVDD1 – 0.1

PGA operation

AVSS + 1.1

AVDD1 – 0.85

Absolute output voltage

Buffer operation

AVSS + 0.1

AVDD1 – 0.1

PGA operation

AVSS + 0.15

AVDD1 – 0.15

ADS1285

SBAS559A – MAY 2022 – REVISED DECEMBER 2022

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