ADS122U04 datasheet(5/63 Pages) TI1

No. de pieza	ADS122U04

Descripción Electrónicos	24-Bit, 4-Channel, 2-kSPS, Delta-Sigma ADC With UART Interface

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Fabricante Electrónico	TI1 [Texas Instruments]

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ADS122U04

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SBAS752 – MAY 2017

Product Folder Links: ADS122U04

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(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

7 Specifications

7.1 Absolute Maximum Ratings

(1)

MIN

MAX

UNIT

Power-supply voltage

AVDD to AVSS

–0.3

7

V

DVDD to DGND

–0.3

7

AVSS to DGND

–2.8

0.3

Analog input voltage

AIN0, AIN1, AIN2, AIN3, REFP, REFN

AVSS – 0.3

AVDD + 0.3

V

Digital input voltage

TX, RX, GPIO0, GPIO1, GPIO2/DRDY, RESET

DGND – 0.3

DVDD + 0.3

V

Input current

Continuous, any pin except power-supply pins

–10

10

mA

Temperature

Junction, TJ

150

°C

Storage, Tstg

–60

150

(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.

7.2 ESD Ratings

VALUE

UNIT

V(ESD)

Electrostatic discharge

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

±2000

V

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

±500

(1)

AINP and AINN denote the positive and negative inputs of the PGA. AINx denotes one of the four available analog inputs.

PGA disabled means the low-noise PGA is powered down and bypassed. Gains of 1, 2, and 4 are still possible in this case.

See the Low-Noise Programmable Gain Stage section for more information.

(2)

VINMAX denotes the maximum differential input voltage, VIN, that is expected in the application. |VINMAX| can be smaller than VREF / Gain.

(3)

Excluding the effects of offset and gain error.

7.3 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)

MIN

NOM

MAX

UNIT

POWER SUPPLY

Unipolar analog power supply

AVDD to AVSS

2.3

5.5

V

AVSS to DGND

–0.1

0

0.1

Bipolar analog power supply

AVDD to DGND

2.3

2.5

2.75

V

AVSS to DGND

–2.75

–2.5

–2.3

Digital power supply

DVDD to DGND

2.3

5.5

V

ANALOG INPUTS(1)

V(AINx)

Absolute input voltage(2)

PGA disabled, gain = 1 to 4

AVSS – 0.1

AVDD + 0.1

V

PGA enabled, gain = 1 to 4

AVSS + 0.2

AVDD – 0.2

PGA enabled, gain = 8 to 128

AVSS + 0.2 +

|VINMAX|·(Gain – 4) / 8

AVDD – 0.2 –

|VINMAX|·(Gain – 4) / 8

VIN

Differential input voltage

VIN = VAINP – VAINN

(3)

–VREF / Gain

VREF / Gain

V

VOLTAGE REFERENCE INPUTS

VREF

Differential reference input voltage

VREF = V(REFP) – V(REFN)

0.75

2.5

AVDD – AVSS

V

V(REFN)

Absolute negative reference voltage

AVSS – 0.1

V(REFP) – 0.75

V

V(REFP)

Absolute positive reference voltage

V(REFN) + 0.75

AVDD + 0.1

V

DIGITAL INPUTS

Input voltage

RX, GPIO0, GPIO1,

GPIO2/DRDY, RESET

DGND

DVDD

V

TEMPERATURE RANGE

TA

Operating ambient temperature

–40

125

°C

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